Earth's Busy Neighborhood
ACC's Small Object Report for 19-25 June 2006
A semi-automated report compiled on 25 June 2006 at 2359 UTC
There are Seven small asteroids reported in the last 168 hours, during which four were newly discovered.
Currently 1,069 NEAs are listed with H>22.0 by JPL and/or the MPC (890 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 exploration and
exploitation in the future. They present a sampling of distant asteroid
populations and a few may be remnants of the event that created the
Earth-Moon system.
Some of these objects are discovered while close to Earth moving across the sky
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 |
viewing |
weekly |
top ]
- Week in Review: During this past week four small asteroids were discovered and three others were observed. The discoveries are credited one each to LINEAR in Massachusetts from its New Mexico observing facility, NEAT in southern California using its Mt. Palomar telescope, and, in Arizona, Spacewatch with its 0.9m telescope and the Mt. Lemmon Survey. Another sixteen observing sites participated in the week's work.
In A/CC's small objects report of June 10th about passers-by, it was mentioned that no asteroids were known to be passing within ten lunar distances (LD) of Earth between 19 and 30 June, but "objects are probably always passing through unnoticed." And, indeed, one was caught by LINEAR last Monday morning, the 19th. 2006 MV1 is within the ten-LD bubble from June 12th until the 30th, and two days after discovery passed Earth at 2.5 LD. It is estimated to be on the order of 15 meters wide and goes out of view for most NEO observers on June 27th.
- June 25: The Sunday Daily Orbit Update (DOU) MPEC 2006-M41 reports observations of three small near-Earth asteroids. Farpoint Observatory in Kansas added 22.272 days to the 6.726-day observing arc for 2006 KJ89 and also tracked 2006 MY1, and Andrushivka Observatory in the Ukraine observed 2006 MB.
- June 24: Observations of two small asteroids are reported in Saturday DOU MPEC 2006-M36. Farpoint Observatory in Kansas provided the first follow-up for 2006 MY1, adding about three days to a one-day observing arc, and Consell Observatory in Spain tracked 2006 MB.
- June 23: The discovery of small asteroid 2006 MH10 has been announced on Friday. It was found yesterday morning by NEAT with its Mt. Palomar telescope and confirmed overnight from England, Brazil, southern California, and Kansas.
Today's DOU MPEC 2006-M31 reports new observations of two small asteroids. The Nordic Near-Earth-Object Network (NEON) used the 2.5m Nordic Optical Telescope on La Palma in the Canary Islands to catch 2006 KC on both sides of midnight of June 21st, adding 21.581 days to a 12.121-day observing arc, and Great Shefford Observatory in England kept track of 2006 MV1. Also, some confirmation observations for 2006 MB were restated.
- June 22: An unusual update MPEC (2006-M21) early Thursday UT reported the first follow-up observations for 2006 MV1. These came from Great Shefford Observatory in England last night and added 1.767 days to this object's 0.993-day observing arc. And today's DOU MPEC 2006-M22 reports observations of two small asteroids, both from Great Shefford, which this morning extended 2006 MV1's arc by another two-plus hours and provided the first observations of 2006 MB beyond its discovery arc, stretching its observing period from 1.145 to 3.742 days.
- June 21: On Wednesday, the discovery of 2006 MY1 has been announced, found by the Mt. Lemmon Survey (MLS) in Arizona yesterday morning. At absolute magnitude (brightness) H=22.1, which very roughly converts to about 130 meters in diameter, it is at the large end of the "small asteroid" scale. And it is among the more distant of the observed small asteroid population with an Earth MOID (minimum orbit intersection distance) of 54.5 lunar distances (see a brief report about distant small asteroids along with news from the week ending June 4th).
Today's DOU MPEC 2006-M17 reports observation of two small asteroids. The MLS added about four days to what had been 2006 KM89's eighteen-day observing arc, and there is additional observation of 2006 MB from within its discovery arc.
- June 20 #2: The discovery of 2006 MV1 by LINEAR yesterday morning has been announced today. JPL calculates that it will fly past Earth tomorrow at 2.5 lunar distances almost exactly 48 hours after discovery.
- June 20 #1: Tuesday's DOU MPEC 2006-M13 reports one small asteroid, with additional observation of 2006 MB from within its discovery arc.
- June 19: No observations of small asteroids are reported in the Monday DOU MPEC, but the discovery of 2006 MB has been announced. It was discovered with the Spacewatch 0.9m telescope on the morning of June 18th and is headed away from Earth, having been closest at the beginning of the month, and will be in view for a few weeks.
- See also news from the week of 12-18 June and from previous weeks, and you can look up individual objects.
Object Listings -- smallest objects first [ Alpha Index | 48 Hours | top ]
2006 MV1 (K06M01V) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 16 meters per JPL H=26.67, MPC H=26.8
JPL classifies 2006 MV1 as an Apollo and calculates an Earth MOID of 0.006643 AU (2.58 LD),
and reports this object passed Earth at 2.5 lunar distances (LD) on 21 June 2006 at 0505 UT.
Lowell Observatory reports 2006 MV1 has an MOID of 0.01705 AU (6.63 LD) with Mars.
Observations are reported from the following observatories in MPECs 2006-M15, 2006-M21,
2006-M22, and 2006-M31:
LINEAR [704]
2006-06-19 0530-0613, 4 pos. in MPEC 2006-M15, discovery (*)
Catalina Sky Survey (CSS) [703]
2006-06-20 0519-0520, 4 pos. in MPEC 2006-M15, confirmation
Great Shefford Obs. [J95]
2006-06-21 2344-2345, 3 pos. in MPEC 2006-M21, follow-up
2006-06-22 0155-0156, 3 pos. in MPEC 2006-M22, follow-up
2006-06-22 2211-2227, 3 pos. in MPEC 2006-M31, follow-up
2006 KJ89 (K06K89J) [ 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 KJ89 as an Amor and calculates an Earth MOID of 0.093078 AU (36.22 LD),
and reports this object passed Earth at 38.5 LD on 3 June 2006.
Lowell Observatory reports 2006 KJ89 has an MOID of 0.03596 AU (13.99 LD) with Mars.
Observations are reported from the following observatories in MPEC 2006-M41:
Farpoint Obs. [734]
2006-06-24 0742-0822, 3 pos. in MPEC 2006-M41, follow-up
See also information from the week ending 4 June 2006.
2006 KM89 (K06K89M) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 62 meters per JPL H=23.67, MPC H=23.6
JPL classifies 2006 KM89 as an Amor and calculates an Earth MOID of 0.146410 AU (56.97 LD).
Lowell Observatory reports 2006 KM89 has an MOID of 0.00359 AU (1.4 LD) with Mars.
Observations are reported from the following observatories in MPEC 2006-M17:
Mt. Lemmon Survey (MLS) [G96]
2006-06-20 0716-0736, 3 pos. in MPEC 2006-M17, follow-up
See also information from the week ending 18 June 2006.
2006 MB (K06M00B) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 103 meters per JPL H=22.59, MPC H=22.6
JPL classifies 2006 MB as an Amor and calculates an Earth MOID of 0.062572 AU (24.35 LD),
and reports this object passed Earth at 27.2 LD on 4 June 2006.
Observations are reported from the following observatories in MPECs 2006-M10, 2006-M13,
2006-M17, 2006-M22, 2006-M31, 2006-M36, and 2006-M41:
Spacewatch 0.9m telescope [691]
2006-06-18 0625-0702, 3 pos. in MPEC 2006-M10, discovery (*)
Andrushivka Obs. [A50]
2006-06-18 2039-2048, 10 pos. in MPECs 2006-M17 -M41, follow-up
2006-06-23 2104-2117, 10 pos. in MPEC 2006-M41, follow-up
2006-06-24 2220-2231, 5 pos. in MPEC 2006-M41, follow-up
Spacewatch 1.8m telescope [291]
2006-06-19 0356-0415, 3 pos. in MPEC 2006-M10, confirmation (t)
2006-06-19 0719-0756, 6 pos. in MPEC 2006-M10, confirmation (t)
Junk Bond Obs. [701]
2006-06-19 0447-0617, 4 pos. in MPEC 2006-M13, follow-up
Farpoint Obs. [734]
2006-06-19 0452-0457, 3 pos. in MPEC 2006-M10, confirmation
Sabino Canyon Obs. [854]
2006-06-19 0452-0526, 3 pos. in MPEC 2006-M10, confirmation
Table Mountain Obs. [673{5}] coded to Jim Young
2006-06-19 0522-0548, 4 pos. in MPEC 2006-M10, confirmation
Kanab Obs. [682]
2006-06-19 0537-0640, 3 pos. in MPECs 2006-M31 -M10, confirmation
Mt. John Obs. [474]
2006-06-19 0918-0953, 5 pos. in MPEC 2006-M10, confirmation (t)
Great Shefford Obs. [J95]
2006-06-22 0006-0014, 3 pos. in MPEC 2006-M22, follow-up
Consell Obs. [176]
2006-06-23 2124-2133, 5 pos. in MPEC 2006-M36, follow-up
2006 MY1 (K06M01Y) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 116 meters per JPL H=22.32, MPC H=22.3
JPL classifies 2006 MY1 as an Amor and calculates an Earth MOID of 0.145143 AU (56.48 LD).
Observations are reported from the following observatories in MPECs 2006-M19, 2006-M36,
and 2006-M41:
Mt. Lemmon Survey (MLS) [G96]
2006-06-20 0712-0759, 8 pos. in MPEC 2006-M19, discovery (*)
SZTE Asteroid Program [461]
2006-06-20 2215-2229, 3 pos. in MPEC 2006-M19, confirmation (F)
Grasslands Obs. [651]
2006-06-21 0423-0436, 3 pos. in MPEC 2006-M19, confirmation
Spacewatch 1.8m telescope [291]
2006-06-21 0453-0503, 3 pos. in MPEC 2006-M19, confirmation
Table Mountain Obs. [673{5}] coded to Jim Young
2006-06-21 0459-0526, 4 pos. in MPEC 2006-M19, confirmation
Farpoint Obs. [734]
2006-06-24 0319-0408, 4 pos. in MPEC 2006-M36, follow-up
2006-06-25 0501-0527, 3 pos. in MPEC 2006-M41, follow-up
2006 KC (K06K00C) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 123 meters per JPL H=22.20, MPC H=22.2
JPL classifies 2006 KC as an Apollo and calculates an Earth MOID of 0.032236 AU (12.54 LD),
and reports this object passed Earth at 16.3 LD on 10 May 2006.
Observations are reported from the following observatories in MPEC 2006-M31:
Nordic Near-Earth-Object Network (NEON) [J50]
2006-06-21 2335-0047, 6 pos. in MPEC 2006-M31, follow-up
See also information from the week ending 18 June 2006.
2006 MH10 (K06M10H) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 125 meters per JPL H=22.17, MPC H=22.3
JPL classifies 2006 MH10 as an Amor and calculates an Earth MOID of 0.123334 AU (47.99 LD).
Observations are reported from the following observatories in MPEC 2006-M32:
NEAT's Mt. Palomar telescope [644]
2006-06-22 0608-0708, 3 pos. in MPEC 2006-M32, discovery (*)
Great Shefford Obs. [J95]
2006-06-22 2242-2246, 2 pos. in MPEC 2006-M32, confirmation
CEAMIG-REA [I77]
2006-06-23 0056-0110, 3 pos. in MPEC 2006-M32, confirmation
Table Mountain Obs. [673{5}] coded to Jim Young
2006-06-23 0425-0527, 4 pos. in MPEC 2006-M32, confirmation
Sandlot Obs. [H36]
2006-06-23 0430-0453, 3 pos. in MPEC 2006-M32, confirmation
48+120 Hours [ Objects Listings (size order) | Object Index (alpha/xref) | top ]
Observations of seven small objects were reported during the last 168 hours:
2006 KC, 2006 KJ89, 2006 KM89, 2006 MB, 2006 MH10, 2006 MV1 & 2006 MY1
in MPECs:
2006-M10 time-stamped 2006 June 19, 17:24 UT - 2006 MB
2006-M13 time-stamped 2006 June 20, 06:14 UT - Daily Orbit Update
2006-M15 time-stamped 2006 June 20, 16:35 UT - 2006 MV1
2006-M17 time-stamped 2006 June 21, 06:15 UT - Daily Orbit Update
2006-M19 time-stamped 2006 June 21, 13:42 UT - 2006 MY1
2006-M21 time-stamped 2006 June 22, 02:23 UT - 2006 MV1
2006-M22 time-stamped 2006 June 22, 06:14 UT - Daily Orbit Update
2006-M31 time-stamped 2006 June 23, 06:16 UT - Daily Orbit Update
2006-M32 time-stamped 2006 June 23, 09:31 UT - 2006 MH10
2006-M36 time-stamped 2006 June 24, 06:16 UT - Daily Orbit Update
2006-M41 time-stamped 2006 June 25, 06:16 UT - Daily Orbit Update
Date & times for other sources that were parsed to compile this page:
JPL Close Approaches, downloaded at 2006 June 25, 1353 UTC
JPL NEO Orbital Elements, downloaded at 2006 June 25, 1412 UTC
Lowell Observatory Orbit intersections, time-stamped 2006 Jun 24 1832:47 UTC
MPC NEA.DAT from MPC mirror, downloaded at 2006 June 25, 1350 UTC
Risk monitoring sites, as of A/CC's check at 2006 June 25, 2359 UTC (see CRT page)
Some observation sets have MPEC codes in parentheses, such as (*) denoting discovery.
Viewing Opportunities for Small Objects [ news | size order | alpha order | top ]
This compilation shows 15 small objects as being currently in view,
including 9 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)
---------- ---------- -------- --- ----- --- - -----------------------
2006 KC40 2006-06-27 0.026521 78 23.20 20 - past obs. - (16 June)
2006 MV1 2006-06-27 0.006643 16 26.67 4 - (23 June)
1997 YM9 2006-06-28 0.029668 45 24.36 2op - aka 2005 YM128 - past obs. - (2 June)
2006 LB 2006-07-02 0.122414 60 23.77 1 - past obs. - (2 June)
2005 YA37 2006-07-09 0.035665 112 22.40 128 - past obs. - (25 May)
2006 KL103 2006-07-14 0.025073 27 25.50 3 - past obs. - (3 June)
2000 HB24 2006-07-15 0.016250 73 23.34 10 - faint recov. poss. - (30 April)
2006 MB 2006-07-25 0.062572 103 22.59 6 - (25 June)
2006 MY1 2006-07-25 0.145143 116 22.32 4 - (25 June)
2006 KM89 2006-08-01 0.146410 62 23.67 22 - (21 June)
2006 KJ89 2006-08-04 0.093078 58 23.85 29 - (25 June)
2006 KK103 2006-08-28 0.146319 107 22.51 9 - past obs. - (4 June)
2006 MH10 2006-09-07 0.123334 125 22.17 1 - (23 June)
1999 LK1 2006-09-11 0.028403 128 22.11 14 - faint recov. poss. - (30 April)
1998 HG49 2006-12-21 0.076170 139 21.94 2op - (30 April)
Viewing by designation order - see also Viewing by date order
Object View until MOID AU Dia H Arc Notes (calc date)
---------- ---------- -------- --- ----- --- - -----------------------
2006 MH10 2006-09-07 0.123334 125 22.17 1 - (23 June)
2006 MY1 2006-07-25 0.145143 116 22.32 4 - (25 June)
2006 MV1 2006-06-27 0.006643 16 26.67 4 - (23 June)
2006 MB 2006-07-25 0.062572 103 22.59 6 - (25 June)
2006 LB 2006-07-02 0.122414 60 23.77 1 - past obs. - (2 June)
2006 KL103 2006-07-14 0.025073 27 25.50 3 - past obs. - (3 June)
2006 KK103 2006-08-28 0.146319 107 22.51 9 - past obs. - (4 June)
2006 KM89 2006-08-01 0.146410 62 23.67 22 - (21 June)
2006 KJ89 2006-08-04 0.093078 58 23.85 29 - (25 June)
2006 KC40 2006-06-27 0.026521 78 23.20 20 - past obs. - (16 June)
1997 YM9 2006-06-28 0.029668 45 24.36 2op - aka 2005 YM128 - past obs. - (2 June)
2005 YA37 2006-07-09 0.035665 112 22.40 128 - past obs. - (25 May)
2000 HB24 2006-07-15 0.016250 73 23.34 10 - faint recov. poss. - (30 April)
1999 LK1 2006-09-11 0.028403 128 22.11 14 - faint recov. poss. - (30 April)
1998 HG49 2006-12-21 0.076170 139 21.94 2op - (30 April)
Out-of-view date based on MPES solar elongation <40° and/or magnitude V>22.0 at 1200 UT
geocentric. (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.
"In view" does not necessarily mean locatable for objects with short arcs in prior years
and for which a large search or accidental rediscovery are the best hopes.
Small object observation cross index [ size order | 48 Hours | viewing | top ]
| Object | Observed by MPC code |
|---|
| 2006 KC | J50 |
| 2006 KJ89 | 734 |
| 2006 KM89 | G96 |
| 2006 MB | 176, 291, 474, 673, 682, 691, 701, 734, 854, A50, J95 |
| 2006 MH10 | 644, 673, H36, I77, J95 |
| 2006 MV1 | 703, 704, J95 |
| 2006 MY1 | 291, 461, 651, 673, 734, G96 |
|
|
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