Earth's Busy Neighborhood
ACC's Small Object Report for 20-26 February 2006
A semi-automated report compiled on 26 February 2006 at 2359 UTC
There are 17* small objects reported in the last 168 hours, during which 10 were newly discovered.
*One other object with absolute magnitude just outside H=22.0 is also included in this week's report.
Currently 1000 NEAs are listed with H>22.0 by JPL and/or the Minor Planet Center (822 are listed as such by both).
[ news | objects by size | object index alpha/cross-ref | 48 Hours | viewing | weekly ]
Editor's note: As asteroids go, "small" is defined as having an
absolute magnitude (brightness) calculated at greater than H=22.0, which
converts very roughly to a diameter under 135 meters.
No matter how close they come to the Earth, the astronomical community
does not classify such objects as "potentially hazardous." However, as
demonstrated by the mile wide (1.6 km.) Barringer Crater in Arizona, blasted
out by a "small" asteroid some 50,000 years ago, there are asteroids too small to be labeled "potentially hazardous" that actually could cause severe local damage. These are sometimes called "Tunguska-class objects" (TCOs), after the 1908 event probably caused by a comet fragment or asteroid too small to be classified today as hazardous but packing enough wallop to flatten a Siberian forest area the size of a large city.
NEODyS in December 2005 changed its main Risk page to classify "Objects too small to result in heavy damage on the ground" as having "absolute magnitude > 25," which corresponds to perhaps 35 meters wide. And JPL two months earlier started flagging (with a blue background) risk-listed objects of "Estimated diameter 50 meters or less" as "not likely to cause significant damage in the event of an impact, although impact damage does depend heavily upon the specific (and usually unknown) physical properties of the object in question."
Small asteroids that come close enough to Earth to be seen have significant
potential for scientific study today, and for future exploration and
exploitation. They are mostly a sampling of distant asteroid populations, but some may be remnants of the event that created the Earth-Moon system.
Often these objects are discovered while close to Earth moving quite quickly, when they are called FMOs or VFMOs (very fast moving objects). The discovery and follow-up tracking of asteroids with H>22.0 represents
some of the most difficult and very best observing work being done today by
amateur and professional astronomers around the world, and the page you are
reading is dedicated to recognizing their ongoing successes.
Small Object News (newest items first) [ object listings |
index |
48 Hours |
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- Week in Review:
In summary, ten small asteroids were discovered this past week of 20-26 February, and six more were tracked, as was an asteroid just outside the definition of small, and observation of another small asteroid was reported from last November. Twenty-one observing facilities participated in the week's work, including, in Arizona, the Catalina Sky Survey (CSS), which made six discoveries, its sibling Mt. Lemmon Survey, which made three, and LONEOS, which made one. (The FMO Project was right behind CSS on one discovery, as reported below about 2006 DU.) Tops among amateur observers was Sandlot Observatory in Kansas, which was in on confirming seven discoveries.
There were two intruders this week, but only one was known at the time to be inside the Earth-Moon system. 2006 DD1 was discovered by CSS at 0622 UT on Wednesday, February 22nd, its discovery announcement was time-stamped 2122 UT, and it passed Earth at 0656 UT the next day at 0.31 lunar distance (LD). Less than a day later, at 0257 UT on Friday the 24th, 2006 DM63 flew by at 0.61 LD, but it wouldn't be discovered until 0445 UT on Monday the 27th, when it was retreating at about 7 LD.
This was the week that the nominal 1,000th small asteroid was discovered, with the announcement of 2006 DD42 on Sunday the 26th. Some asteroids on either side of the H>22.0 dividing line may cross over with future observation and calculation, and even more will someday cross over when physically measured. But, still, it is a bit of a milestone. This count comes from totalling all asteroids with H>22.0 as calculated by the Minor Planet Center or JPL and published in their online databases, so it is important to note that they agree on only 822. The differences come from differing H calculations and differing decisions on what asteroids to list as near-Earth asteroids (NEAs). For comparison, the MPC NEA list on March 4th contains 3,656 as compared with JPL's 3,911 asteroidal objects. And JPL includes, for instance, all seven small asteroids discovered during 1991, while the MPC lists only one (tiny 1991 VG, which was observed again in April 1992).
The first asteroid discovered with H calculated over 22.0 was 1990 UN. IAUC 5130 of 2 November 1990 in its copyrighted report stated that "1990 UN ... has absolute magnitude H=23.5, making it intrinsically the faintest natural object ever observed outside the earth's atmosphere." The discovery "during October" was made with the Spacewatch 0.9m telescope and its new 2048x2048 CCD, and comment was made that more discoveries were likely but, "since the number of IAUC subscribers who are both willing and able to perform follow-up astrometry or physical observations must be extremely small, there seems little need to give these very faint objects extensive coverage in the IAUCs."
The next small object was reported in IAUC 5172 of 21 January 1991. Spacewatch's Jan. 18.23 UT discovery 1991 BA was announced as passing Earth "at a record (geocentric) miss distance of 0.0011 AU (170 000 km) on Jan. 18.72 UT," and having H=28.5, "presumably some ten times smaller than 1990 UN." There were six more H>22.0 discoveries during 1991 -- as many as are sometimes found today in a week -- but, in the 15 years and 998 discoveries since then, only 16 have been observed by telescope to come closer than 1991 BA's 0.44 lunar distance.
- Feb. 26: The discovery of small asteroid 2006 DD42 was announced today and Sunday's Minor Planet Center (MPC) Daily Orbit Update (DOU) MPEC 2006-D48 carries observations of four other small asteroids. 2006 DL and 2006 DN were tracked and additional positions were reported for 2006 DQ14 within its discovery arc. 2006 BA9 is now only visible to larger telescopes and was followed from Arizona with the Spacewatch 1.8-meter.
- Feb. 25: Discoveries from Arizona of two small asteroids were announced today: tiny 2006 DR14 from the Mt. Lemmon Survey and tinier 2006 DQ14 from LONEOS. MPES is showing that 2006 DR14 flew past Earth on the 23rd at about 3.0 lunar distances (LD), while 2006 DQ14 was at about 5.1 LD during 21-22 Feb.
The Saturday DOU MPEC 2006-D39 reports observation of eight small asteroids: 2005 WG57 from late December,
risk-listed 2006 DL and
2006 DN,
the first follow-up for 2006 DX since its discovery announcement,
2006 AX44 with its observing arc more than doubled to about 45 days,
smallish 2006 BE55, plus
2006 CL9 and
2006 CW.
- Feb. 24: Friday's DOU MPEC 2006-D36 carries positions reported for five small asteroids:
2006 DL,
2006 DM,
the now departed 2006 DD1,
risk listed 2006 DN,
and borderline-small 2006 BE55.
- Feb. 23: Thursday DOU MPEC 2006-D26 reports observations of of six small asteroids: 2006 CT, 2006 CL9, 2006 DD1,
2006 DM, and risk-listed
2006 DL and
2006 DN. The swiftly departing 2006 DD1 was tracked by Sabino Canyon Observatory and the Catalina Sky Survey, both in Arizona, and has been removed as an impact risk.
- Feb. 22 #2: The discoveries of four small asteroids have been announced today. The latest of these, 2006 DD1, is coming into the Earth-Moon system and JPL reports will pass Earth at 0.3 lunar distance tomorrow at around 0700 UT and quickly go out of view. It was discovered by the Catalina Sky Survey (CSS) in Arizona at 0622 today and confirmed from there three and a half hours later. UPDATE: JPL has posted 2006 DD1 as an impact risk.
Also discovered by CSS are 2006 DA1 and 2006 DU, and the nearby Mt. Lemmon Survey discovered 2006 DX. The earliest observation of 2006 DU came in the hour before discovery, reported by FMO Project volunteer H. Liu of China who was reviewing images online from the Spacewatch 0.9m telescope in Arizona.
- Feb. 22 #1: JPL and NEODyS have posted 2006 DL and 2006 DN as impact risks. And JPL today removed the last impact solutions for 2006 CT after it was the only small asteroid reported in today's DOU MPEC 2006-D15. It was caught with the Spacewatch 1.8m telescope in Arizona, adding about 14 days to what had been a 5-day observing arc.
- Feb. 21 #2: Three asteroid discoveries were announced today, and all three are small objects: 2006 DL, 2006 DM, and 2006 DN. They were all found by the Catalina Sky Survey in Arizona.
- Feb. 21 #1: The Tuesday DOU MPEC 2006-D11 reports observations of four small asteroids. The Spacewatch 1.8m telescope in Arizona was used to add about 19 days to what had been a 10-day observing arc for 2006 BA9, and 16 days to an 11-day arc for 2006 BO6, which has just gone out of view for most NEO observers. 2006 CW was tracked by the Catalina Sky Survey in Arizona , and 2006 CL9 by LINEAR in New Mexico and Naef Observatory in Switzerland.
- Feb. 20: Monday's DOU MPEC 2006-D10 reports observation of one small asteroid, 2006 CL9, from McCarthy Observatory in Connecticut.
- See more news, from the week of 13-19 February 2006 and other weeks.
Object Listings -- smallest objects first [ Alpha Index | 48 Hours | top ]
2006 DQ14 (K06D14Q) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 13 meters per JPL H=27.04, MPC H=27.1
JPL classifies 2006 DQ14 as an Apollo and calculates an Earth MOID of 0.013349 AU (5.19 LD),
and reports this object passed Earth at 5.2 lunar distances (LD) on 22 Feb. 2006 at about 0438 UT.
Observations are reported from the following observatories in MPECs 2006-D41 and 2006-D48:
LONEOS [699]
2006-02-23 0620-0759, 4 pos in MPEC 2006-D41, discovery (*)
2006-02-25 0713-0738, 8 pos in MPEC 2006-D48, follow-up
LINEAR [704]
2006-02-24 0649-0757, 5 pos in MPEC 2006-D41, confirmation
2006-02-25 0719-0827, 5 pos in MPEC 2006-D48, follow-up
Mt. Lemmon Survey (MLS) [G96]
2006-02-24 0833-0834, 4 pos in MPEC 2006-D41, confirmation
2006-02-24 1010-1011, 4 pos in MPEC 2006-D41, confirmation
2006-02-25 0552-0553, 4 pos in MPEC 2006-D41, confirmation
Farpoint Obs. [734]
2006-02-25 0443-0453, 3 pos in MPEC 2006-D41, confirmation
Grasslands Obs. [651]
2006-02-25 0830-0832, 3 pos in MPEC 2006-D41, confirmation
2006 DD1 (K06D01D) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 17 meters per JPL H=26.54, MPC H=26.5
This object was listed from 22 until 23 Feb. 2006 as an impact risk.
JPL classifies 2006 DD1 as an Apollo and calculates an Earth MOID of 0.000612 AU (0.24 LD),
and reports this object passed Earth at 0.3 LD on 23 Feb. 2006 at 0656 UT.
Observations are reported from the following observatories in MPECs 2006-D24, 2006-D26,
and 2006-D36:
Catalina Sky Survey (CSS) [703]
2006-02-22 0622-0736, 8 pos in MPEC 2006-D24, discovery (*)
2006-02-22 0952-1000, 4 pos in MPEC 2006-D24, confirmation
2006-02-23 0233-0358, 12 pos in MPECs 2006-D26 -D36, follow-up
2006-02-23 0557-0637, 16 pos in MPEC 2006-D36, follow-up
Sabino Canyon Obs. [854]
2006-02-23 0210-0340, 11 pos in MPEC 2006-D26, follow-up
2006-02-23 0520-0520, 3 pos in MPEC 2006-D26, follow-up
McCarthy Obs. [932]
2006-02-23 0352-0402, 5 pos in MPEC 2006-D36, follow-up
2006 DR14 (K06D14R) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 20 meters per JPL H=26.13, MPC H=26.1
JPL classifies 2006 DR14 as an Apollo and calculates an Earth MOID of 0.003302 AU (1.28 LD),
and reports this object passed Earth at 3.0 LD on 23 Feb. 2006 at 0247 UT.
Observations are reported from the following observatories in MPEC 2006-D42:
Mt. Lemmon Survey (MLS) [G96]
2006-02-24 0635-0834, 12 pos in MPEC 2006-D42, discovery (*)
2006-02-24 1008-1009, 4 pos in MPEC 2006-D42, confirmation
2006-02-25 0711-0712, 2 pos in MPEC 2006-D42, confirmation
Sandlot Obs. [H36]
2006-02-24 1032-1036, 2 pos in MPEC 2006-D42, confirmation
Andrushivka Obs. [A50]
2006-02-24 1726-1729, 4 pos in MPEC 2006-D42, confirmation
Farpoint Obs. [734]
2006-02-25 0509-0514, 4 pos in MPEC 2006-D42, confirmation
McCarthy Obs. [932]
2006-02-25 0747-0804, 3 pos in MPEC 2006-D42, confirmation
Grasslands Obs. [651]
2006-02-25 0838-0840, 3 pos in MPEC 2006-D42, confirmation
2006 AX44 (K06A44X) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 35 meters per JPL H=24.94, MPC H=24.8
This object was listed from 12 until 21 Jan. 2006 as an impact risk.
JPL classifies 2006 AX44 as an Amor and calculates an Earth MOID of 0.116875 AU (45.48 LD).
Lowell Observatory reports 2006 AX44 has an MOID of 0.04781 AU (18.6 LD) with Mars.
Observations are reported from the following observatories in MPEC 2006-D39:
Mt. Lemmon Survey (MLS) [G96]
2006-02-24 0712-0736, 3 pos in MPEC 2006-D39, follow-up
See also information from the week ending 5 Feb. 2006.
2006 DA1 (K06D01A) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 36 meters per JPL H=24.84, MPC H=24.8
JPL classifies 2006 DA1 as an Apollo and calculates an Earth MOID of 0.024118 AU (9.38 LD),
and reports this object passed Earth at 9.5 LD on 24 Feb. 2006 at 1115 UT.
Lowell Observatory reports 2006 DA1 has an MOID of 0.01463 AU (5.69 LD) with Mars.
Observations are reported from the following observatories in MPEC 2006-D21:
Catalina Sky Survey (CSS) [703]
2006-02-21 0834-0957, 8 pos in MPEC 2006-D21, discovery (*)
2006-02-21 1207-1209, 4 pos in MPEC 2006-D21, confirmation
2006-02-22 0738-0740, 4 pos in MPEC 2006-D21, confirmation
2006-02-22 1005-1006, 4 pos in MPEC 2006-D21, confirmation
Sandlot Obs. [H36]
2006-02-22 0355-0422, 6 pos in MPEC 2006-D21, confirmation
Sabino Canyon Obs. [854]
2006-02-22 0540-0545, 3 pos in MPEC 2006-D21, confirmation
2006 DU (K06D00U) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 38 meters per JPL H=24.76, MPC H=24.7
JPL classifies 2006 DU as an Apollo and calculates an Earth MOID of 0.024599 AU (9.57 LD),
and reports this object passed Earth at 14.2 LD on 25 Feb. 2006
Observations are reported from the following observatories in MPEC 2006-D16:
Spacewatch 0.9m telescope [691]
2006-02-20 0533-0625, 3 pos in MPEC 2006-D16, prediscovery (t)
Catalina Sky Survey (CSS) [703]
2006-02-20 0625-0722, 7 pos in MPEC 2006-D16, discovery (*)
2006-02-20 1033-1114, 3 pos in MPEC 2006-D16, confirmation
2006-02-21 0910-1004, 8 pos in MPEC 2006-D16, confirmation
2006-02-22 0743-0745, 4 pos in MPEC 2006-D16, confirmation
Great Shefford Obs. [J95]
2006-02-20 2151-2158, 3 pos in MPEC 2006-D16, confirmation
Sandlot Obs. [H36]
2006-02-21 0809-0821, 4 pos in MPEC 2006-D16, confirmation
2006-02-22 0817-0826, 4 pos in MPEC 2006-D16, confirmation
Sabino Canyon Obs. [854]
2006-02-21 0859-0908, 6 pos in MPEC 2006-D16, confirmation
Mt. Lemmon Survey (MLS) [G96]
2006-02-21 0909-0944, 4 pos in MPEC 2006-D16, confirmation
2006 DN (K06D00N) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 40 meters per JPL H=24.63, MPC H=24.7
This object has been listed as an impact risk since 22 Feb. 2006.
JPL classifies 2006 DN as an Apollo and calculates an Earth MOID of 0.004366 AU (1.70 LD),
and reports this object will pass Earth at 10.2 LD on 17 March 2006
Lowell Observatory reports 2006 DN has an MOID of 0.02166 AU (8.43 LD) with Mars.
Observations are reported from the following observatories in MPECs 2006-D14, 2006-D26,
2006-D36, 2006-D39, and 2006-D48:
Catalina Sky Survey (CSS) [703]
2006-02-20 0931-1110, 8 pos in MPEC 2006-D14, discovery (*)
Great Shefford Obs. [J95]
2006-02-21 0013-0021, 3 pos in MPEC 2006-D14, confirmation
Sandlot Obs. [H36]
2006-02-21 0741-0802, 3 pos in MPEC 2006-D14, confirmation
Mt. Lemmon Survey (MLS) [G96]
2006-02-21 0816-1034, 8 pos in MPEC 2006-D14, confirmation
Sabino Canyon Obs. [854]
2006-02-21 0841-0849, 3 pos in MPEC 2006-D14, confirmation
Eschenberg Obs. [151]
2006-02-21 2032-2038, 3 pos in MPEC 2006-D14, confirmation
Spacewatch 1.8m telescope [291]
2006-02-22 0617-0642, 3 pos in MPEC 2006-D26, follow-up
2006-02-24 0447-0459, 3 pos in MPEC 2006-D39, follow-up
Antares Obseratory [H55]
2006-02-23 0700-0748, 3 pos in MPEC 2006-D48, follow-up
Farpoint Obs. [734]
2006-02-23 0752-0801, 3 pos in MPEC 2006-D36, follow-up
2006-02-24 0931-0944, 3 pos in MPEC 2006-D39, follow-up
Powell Obs. [649]
2006-02-23 0944-0951, 3 pos in MPEC 2006-D39, follow-up
LINEAR [704]
2006-02-25 0743-0834, 4 pos in MPEC 2006-D48, follow-up
2006 DX (K06D00X) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 44 meters per JPL H=24.44, MPC H=24.6
JPL classifies 2006 DX as an Apollo and calculates an Earth MOID of 0.046203 AU (17.98 LD),
and reports this object passed Earth at 36.1 LD on 16 Sept.
Observations are reported from the following observatories in MPECs 2006-D18 and 2006-D39:
Mt. Lemmon Survey (MLS) [G96]
2006-02-20 0928-1125, 8 pos in MPEC 2006-D18, discovery (*)
2006-02-21 0815-0852, 4 pos in MPEC 2006-D18, confirmation
2006-02-24 0707-0742, 4 pos in MPEC 2006-D39, follow-up
Sandlot Obs. [H36]
2006-02-21 0631-0707, 3 pos in MPEC 2006-D18, confirmation
Spacewatch 1.8m telescope [291]
2006-02-21 0817-0829, 3 pos in MPEC 2006-D18, confirmation
2006 DM (K06D00M) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 50 meters per JPL H=24.15, MPC H=24.2
JPL classifies 2006 DM as an Amor and calculates an Earth MOID of 0.078897 AU (30.70 LD),
and reports this object passed Earth at 31.1 LD on 23 Feb. 2006
Observations are reported from the following observatories in MPECs 2006-D13, 2006-D26,
and 2006-D36:
Catalina Sky Survey (CSS) [703]
2006-02-20 0757-0849, 8 pos in MPEC 2006-D13, discovery (*)
Great Shefford Obs. [J95]
2006-02-20 2121-2131, 3 pos in MPEC 2006-D13, confirmation
Sandlot Obs. [H36]
2006-02-21 0333-0351, 3 pos in MPEC 2006-D13, confirmation
Mt. Lemmon Survey (MLS) [G96]
2006-02-21 0813-0851, 4 pos in MPEC 2006-D13, confirmation
2006-02-23 0714-0749, 4 pos in MPEC 2006-D36, follow-up
Sabino Canyon Obs. [854]
2006-02-21 0822-0830, 3 pos in MPEC 2006-D13, confirmation
Eschenberg Obs. [151]
2006-02-21 1843-1856, 4 pos in MPEC 2006-D13, confirmation
LINEAR [704]
2006-02-22 0717-0812, 4 pos in MPEC 2006-D26, follow-up
2006 DD42 (K06D42D) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 58 meters per JPL H=23.85, MPC H=23.8
JPL classifies 2006 DD42 as an Amor and calculates an Earth MOID of 0.124831 AU (48.57 LD).
Observations are reported from the following observatories in MPEC 2006-D49:
Mt. Lemmon Survey (MLS) [G96]
2006-02-24 0938-1005, 4 pos in MPEC 2006-D49, discovery (*)
2006-02-24 1140-1142, 2 pos in MPEC 2006-D49, confirmation
2006-02-25 0928-0932, 4 pos in MPEC 2006-D49, confirmation
Spacewatch 1.8m telescope [291]
2006-02-26 0619-0630, 3 pos in MPEC 2006-D49, confirmation
2005 WG57 (K05W57G) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 63 meters per JPL H=23.64, MPC H=23.7
This object has been listed as an impact risk since 1 Dec. 2005.
JPL classifies 2005 WG57 as an Apollo and calculates an Earth MOID of 0.001690 AU (0.66 LD),
and reports this object passed Earth at 13.9 LD on 21 Nov.
Lowell Observatory reports 2005 WG57 has an MOID of 0.04401 AU (17.12 LD) with Mars.
Observations are reported from the following observatories in MPEC 2006-D39:
Mauna Kea [568{2}] coded to David Tholen et al.
2005-12-30 0557-0603, 2 pos in MPEC 2006-D39, follow-up
See also information from the week ending 1 Jan. 2006.
2006 BA9 (K06B09A) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 91 meters per JPL H=22.86, MPC H=22.7
JPL classifies 2006 BA9 as an Aten and calculates an Earth MOID of 0.072470 AU (28.20 LD).
Observations are reported from the following observatories in MPECs 2006-D11 and 2006-D48:
Spacewatch 1.8m telescope [291]
2006-02-20 0529-0540, 3 pos in MPEC 2006-D11, follow-up (H)
2006-02-25 0308-0332, 3 pos in MPEC 2006-D48, follow-up (H)
See also information from the week ending 5 Feb. 2006.
2006 CL9 (K06C09L) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 102 meters per JPL H=22.61, MPC H=22.4
JPL classifies 2006 CL9 as an Amor and calculates an Earth MOID of 0.039754 AU (15.47 LD),
and reports this object passed Earth at 18.6 LD on 25 Feb. 2006
Observations are reported from the following observatories in MPECs 2006-D10, 2006-D11,
2006-D26, and 2006-D39:
Schiaparelli Obs. [204]
2006-02-17 2339-2344, 2 pos in MPEC 2006-D10, follow-up
McCarthy Obs. [932]
2006-02-20 0302-0316, 3 pos in MPEC 2006-D10, follow-up
LINEAR [704]
2006-02-20 0535-0652, 5 pos in MPEC 2006-D11, follow-up
Naef Obs. [A13]
2006-02-20 1911-1958, 4 pos in MPEC 2006-D11, follow-up
Catalina Sky Survey (CSS) [703]
2006-02-22 0308-0337, 3 pos in MPEC 2006-D26, follow-up
LONEOS [699]
2006-02-24 0411-0609, 4 pos in MPEC 2006-D39, follow-up
See also information from the week ending 19 Feb. 2006.
2006 DL (K06D00L) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 105 meters per JPL H=22.54, MPC H=22.4
This object has been listed as an impact risk since 22 Feb. 2006.
JPL classifies 2006 DL as an Apollo and calculates an Earth MOID of 0.009285 AU (3.61 LD),
and reports this object passed Earth at 22.3 LD on 10 Feb. 2006
Lowell Observatory reports 2006 DL has significant MOIDs with planets Venus (0.02364 AU =
9.2 LD) and Mars (0.01923 AU = 7.48 LD).
Observations are reported from the following observatories in MPECs 2006-D12, 2006-D26,
2006-D36, 2006-D39, and 2006-D48:
Catalina Sky Survey (CSS) [703]
2006-02-20 0416-0608, 7 pos in MPEC 2006-D12, discovery (*)
McCarthy Obs. [932]
2006-02-20 0545-0637, 3 pos in MPEC 2006-D26, follow-up
2006-02-21 0056-0122, 3 pos in MPEC 2006-D12, confirmation
Sabino Canyon Obs. [854]
2006-02-20 0627-0641, 2 pos in MPEC 2006-D12, confirmation
Great Shefford Obs. [J95]
2006-02-20 2023-2026, 2 pos in MPEC 2006-D12, confirmation
Sandlot Obs. [H36]
2006-02-21 0253-0310, 2 pos in MPEC 2006-D12, confirmation
2006-02-24 0550-0617, 3 pos in MPEC 2006-D36, follow-up
Eschenberg Obs. [151]
2006-02-21 2103-2113, 3 pos in MPEC 2006-D12, confirmation
Spacewatch 0.9m telescope [691]
2006-02-23 0251-0344, 3 pos in MPEC 2006-D26, follow-up (t)
Spacewatch 1.8m telescope [291]
2006-02-24 0256-0308, 3 pos in MPEC 2006-D39, follow-up (H)
2006-02-25 0217-0228, 3 pos in MPEC 2006-D48, follow-up
2006 CW (K06C00W) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 109 meters per JPL H=22.47, MPC H=22.5
JPL classifies 2006 CW as an Amor and calculates an Earth MOID of 0.152999 AU (59.53 LD).
Observations are reported from the following observatories in MPECs 2006-D11 and 2006-D39:
Catalina Sky Survey (CSS) [703]
2006-02-20 0759-0816, 4 pos in MPEC 2006-D11, follow-up
Spacewatch 1.8m telescope [291]
2006-02-24 0426-0439, 3 pos in MPEC 2006-D39, follow-up
See also information from the week ending 19 Feb. 2006.
2006 BO6 (K06B06O) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 112 meters per JPL H=22.40, MPC H=22.4
JPL classifies 2006 BO6 as an Apollo and calculates an Earth MOID of 0.029806 AU (11.60 LD).
Lowell Observatory reports 2006 BO6 has an MOID of 0.6599 AU (256.8 LD) with Jupiter.
Observations are reported from the following observatories in MPEC 2006-D11:
Spacewatch 1.8m telescope [291]
2006-02-20 0502-0519, 3 pos in MPEC 2006-D11, follow-up (H)
See also information from the week ending 5 Feb. 2006.
2006 CT (K06C00T) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 117 meters per JPL H=22.31, MPC H=22.2
This object was listed from 5 until 22 Feb. 2006 as an impact risk.
JPL classifies 2006 CT as an Apollo and calculates an Earth MOID of 0.001701 AU (0.66 LD).
Observations are reported from the following observatories in MPECs 2006-D15 and 2006-D26:
Spacewatch 1.8m telescope [291]
2006-02-21 0836-0848, 3 pos in MPEC 2006-D15, follow-up
2006-02-22 0837-0848, 3 pos in MPEC 2006-D26, follow-up (t)
See also information from the week ending 12 Feb. 2006.
2006 BE55 (K06B55E) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 141 meters per JPL H=21.90, MPC H=21.9 -- borderline size ("not small")
JPL classifies 2006 BE55 as an Apollo and calculates an Earth MOID of 0.023644 AU (9.20 LD),
and reports this object will pass Earth at 16.1 LD on 27 Feb. 2006
Lowell Observatory reports 2006 BE55 has significant MOIDs with planets Venus (0.00395 AU =
1.54 LD) and Mars (0.04380 AU = 17.04 LD).
Observations are reported from the following observatories in MPECs 2006-D36 and 2006-D39:
Baldwin Lake Obs. [G77]
2006-02-23 0901-1038, 4 pos in MPEC 2006-D36, follow-up
Pla D'Arguines Obs. [941]
2006-02-25 0247-0248, 3 pos in MPEC 2006-D39, follow-up
See also information from the week ending 19 Feb. 2006.
48 Hours [ Objects Listings (size order) | Object Index (alpha/xref) | top ]
Observations of 12 small objects were reported during the last 48 hours:
2005 WG57, 2006 AX44, 2006 BA9, 2006 BE55, 2006 CL9, 2006 CW, 2006 DD42, 2006 DL,
2006 DN, 2006 DQ14, 2006 DR14 & 2006 DX
in MPECs:
2006-D39 time-stamped 2006 Feb. 25, 07:28 UT - Daily Orbit Update
2006-D41 time-stamped 2006 Feb. 25, 15:14 UT - 2006 DQ14
2006-D42 time-stamped 2006 Feb. 25, 15:19 UT - 2006 DR14
2006-D48 time-stamped 2006 Feb. 26, 07:30 UT - Daily Orbit Update
2006-D49 time-stamped 2006 Feb. 26, 13:43 UT - 2006 DD42
Date & times for other sources that were parsed to compile this page:
JPL Close Approaches, downloaded at 2006 Feb. 26, 1716 UTC
JPL NEO Orbital Elements, downloaded at 2006 Feb. 26, 1822 UTC
Lowell Observatory Orbit intersections, time-stamped 2006 Feb 26 09:28:58 UTC
MPC NEA.DAT from MPC mirror, downloaded at 2006 Feb. 26, 1714 UTC
Risk monitoring sites, as of A/CC's check at 2006 Feb. 26, 2359 UTC (see CRT page)
Viewing Opportunities for Small Objects [ news | size order | alpha order | top ]
This compilation shows 25 small objects as being currently in view,
including 10 not reported in the last seven days.
Viewing by date order - see this list also by designation order
Object View until MOID AU Dia H Arc Notes (calc date)
---------- ---------- -------- --- ----- --- - -----------------------
2005 CN61 2006-02-28 0.021639 29 25.30 6 - very faint recov. poss. - (15 Dec.)
2006 BN26 2006-02-28 0.026180 68 23.49 13 - past obs. - (8 Feb.)
2006 DA1 2006-03-01 0.024118 36 24.84 1 - (22 Feb.)
2005 ML13 2006-03-02 0.062125 112 22.41 2op - past obs. - (30 Jan.)
2006 BJ55 2006-03-02 0.027612 49 24.21 14 - past obs. - (10 Feb.)
2006 BO6 2006-03-03 0.029806 112 22.40 29 - (21 Feb.)
2006 BE55 2006-03-05 0.023644 141 21.90 30 - (25 Feb.)
2006 DX 2006-03-06 0.046203 44 24.44 4 - (22 Feb.)
2006 BZ147 2006-03-07 0.002250 28 25.42 18 - past obs. - (19 Feb.)
2005 RZ2 2006-03-08 0.077868 77 23.22 5 - (28 Dec.)
2006 DR14 2006-03-08 0.003302 20 26.13 1 - (25 Feb.)
2006 AX44 2006-03-09 0.116875 35 24.94 45 - was risk listed - (25 Feb.)
1999 NW2 2006-03-10 0.016428 80 23.13 28 - very faint recov. poss. - (15 Dec.)
2006 DL 2006-03-10 0.009285 105 22.54 5 - risk listed - (26 Feb.)
2006 DQ14 2006-03-12 0.013349 13 27.04 2 - (26 Feb.)
2006 DU 2006-03-15 0.024599 38 24.76 2 - (22 Feb.)
1999 AO10 2006-03-18 0.021364 57 23.86 33 - faint recov. poss. - (15 Dec.)
2006 CT 2006-03-19 0.001701 117 22.31 20 - was risk listed - (23 Feb.)
2006 DD42 2006-04-08 0.124831 58 23.85 2 - (26 Feb.)
2006 DM 2006-04-10 0.078897 50 24.15 3 - (24 Feb.)
2006 DN 2006-04-11 0.004366 40 24.63 5 - risk listed - (26 Feb.)
2005 XO4 2006-04-20 0.021856 126 22.14 23 - past obs. - (7 Jan.)
2006 CL9 2006-05-28 0.039754 102 22.61 20 - (25 Feb.)
2006 CW 2006-06-01 0.152999 109 22.47 21 - (25 Feb.)
2005 YA37 2006-07-09 0.035667 111 22.43 26 - past obs. - (4 Feb.)
Coming into view soon:
2002 GK1 2006-05-05 0.004309 114 22.36 6 - >10 March, faint recov. poss. - (22 Jan.)
Viewing by designation order - see also Viewing by date order
Object View until MOID AU Dia H Arc Notes (calc date)
---------- ---------- -------- --- ----- --- - -----------------------
2006 DD42 2006-04-08 0.124831 58 23.85 2 - (26 Feb.)
2006 DR14 2006-03-08 0.003302 20 26.13 1 - (25 Feb.)
2006 DQ14 2006-03-12 0.013349 13 27.04 2 - (26 Feb.)
2006 DA1 2006-03-01 0.024118 36 24.84 1 - (22 Feb.)
2006 DX 2006-03-06 0.046203 44 24.44 4 - (22 Feb.)
2006 DU 2006-03-15 0.024599 38 24.76 2 - (22 Feb.)
2006 DN 2006-04-11 0.004366 40 24.63 5 - risk listed - (26 Feb.)
2006 DM 2006-04-10 0.078897 50 24.15 3 - (24 Feb.)
2006 DL 2006-03-10 0.009285 105 22.54 5 - risk listed - (26 Feb.)
2006 CL9 2006-05-28 0.039754 102 22.61 20 - (25 Feb.)
2006 CW 2006-06-01 0.152999 109 22.47 21 - (25 Feb.)
2006 CT 2006-03-19 0.001701 117 22.31 20 - was risk listed - (23 Feb.)
2006 BZ147 2006-03-07 0.002250 28 25.42 18 - past obs. - (19 Feb.)
2006 BJ55 2006-03-02 0.027612 49 24.21 14 - past obs. - (10 Feb.)
2006 BE55 2006-03-05 0.023644 141 21.90 30 - (25 Feb.)
2006 BN26 2006-02-28 0.026180 68 23.49 13 - past obs. - (8 Feb.)
2006 BO6 2006-03-03 0.029806 112 22.40 29 - (21 Feb.)
2006 AX44 2006-03-09 0.116875 35 24.94 45 - was risk listed - (25 Feb.)
2005 YA37 2006-07-09 0.035667 111 22.43 26 - past obs. - (4 Feb.)
2005 XO4 2006-04-20 0.021856 126 22.14 23 - past obs. - (7 Jan.)
2005 RZ2 2006-03-08 0.077868 77 23.22 5 - (28 Dec.)
2005 ML13 2006-03-02 0.062125 112 22.41 2op - past obs. - (30 Jan.)
2005 CN61 2006-02-28 0.021639 29 25.30 6 - very faint recov. poss. - (15 Dec.)
2002 GK1 2006-05-05 0.004309 114 22.36 6 - >10 March, faint recov. poss. - (22 Jan.)
1999 NW2 2006-03-10 0.016428 80 23.13 28 - very faint recov. poss. - (15 Dec.)
1999 AO10 2006-03-18 0.021364 57 23.86 33 - faint recov. poss. - (15 Dec.)
Out-of-view date based on MPES solar elongation <40° and/or magnitude V>22.0 at 1200 UT.
(Not factored in is any lunar interference with viewing.)
Objects are linked in the left-most column only if observed in the last seven days,
while objects with earlier small-object reporting are linked under "Notes."
Diameter ("Dia") is in meters, a very rough estimate from brightness (H).
Observing "Arc" is from MPES in days or number of oppositions.
Small object observation cross index [ size order | 48 Hours | viewing | top ]
| Object | Observed by MPC code |
|---|
| 2005 WG57 | 568 |
| 2006 AX44 | G96 |
| 2006 BA9 | 291 |
| 2006 BE55 | 941, G77 |
| 2006 BO6 | 291 |
| 2006 CL9 | 204, 699, 703, 704, 932, A13 |
| 2006 CT | 291 |
| 2006 CW | 291, 703 |
| 2006 DA1 | 703, 854, H36 |
| 2006 DD1 | 703, 854, 932 |
| 2006 DD42 | 291, G96 |
| 2006 DL | 151, 291, 691, 703, 854, 932, H36, J95 |
| 2006 DM | 151, 703, 704, 854, G96, H36, J95 |
| 2006 DN | 151, 291, 649, 703, 704, 734, 854, G96, H36, H55, J95 |
| 2006 DQ14 | 651, 699, 704, 734, G96 |
| 2006 DR14 | 651, 734, 932, A50, G96, H36 |
| 2006 DU | 691, 703, 854, G96, H36, J95 |
| 2006 DX | 291, G96, H36 |
|
| Code | Observatory | Objects Observed |
|---|
| 151 | Eschenberg Obs. | 2006 DL, 2006 DM, 2006 DN |
| 204 | Schiaparelli Obs. | 2006 CL9 |
| 291 | Spacewatch 1.8m telescope | 2006 BA9, 2006 BO6, 2006 CT, 2006 CW, 2006 DD42, 2006 DL, 2006 DN, 2006 DX |
| 5682 | Mauna Kea - David Tholen et al. | 2005 WG57 |
| 649 | Powell Obs. | 2006 DN |
| 651 | Grasslands Obs. | 2006 DQ14, 2006 DR14 |
| 691 | Spacewatch 0.9m telescope | 2006 DL, 2006 DU |
| 699 | LONEOS | 2006 CL9, 2006 DQ14 |
| 703 | Catalina Sky Survey (CSS) | 2006 CL9, 2006 CW, 2006 DA1, 2006 DD1, 2006 DL, 2006 DM, 2006 DN, 2006 DU |
| 704 | LINEAR | 2006 CL9, 2006 DM, 2006 DN, 2006 DQ14 |
| 734 | Farpoint Obs. | 2006 DN, 2006 DQ14, 2006 DR14 |
| 854 | Sabino Canyon Obs. | 2006 DA1, 2006 DD1, 2006 DL, 2006 DM, 2006 DN, 2006 DU |
| 932 | McCarthy Obs. | 2006 CL9, 2006 DD1, 2006 DL, 2006 DR14 |
| 941 | Pla D'Arguines Obs. | 2006 BE55 |
| A13 | Naef Obs. | 2006 CL9 |
| A50 | Andrushivka Obs. | 2006 DR14 |
| G77 | Baldwin Lake Obs. | 2006 BE55 |
| G96 | Mt. Lemmon Survey (MLS) | 2006 AX44, 2006 DD42, 2006 DM, 2006 DN, 2006 DQ14, 2006 DR14, 2006 DU, 2006 DX |
| H36 | Sandlot Obs. | 2006 DA1, 2006 DL, 2006 DM, 2006 DN, 2006 DR14, 2006 DU, 2006 DX |
| H55 | Antares Obseratory | 2006 DN |
| J95 | Great Shefford Obs. | 2006 DL, 2006 DM, 2006 DN, 2006 DU |
|
[ object listings |
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