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Earth's Busy Neighborhood

    ACC's Small Object Report for 16-23 April 2006    

A semi-automated report compiled on 23 April 2006 at 2357 UTC

There are 14 small asteroids reported in the last 168 hours, during which five were newly discovered.
Currently 1,034 NEAs are listed with H>22.0 by JPL and/or the MPC (854 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 someday. Mainly a sampling of distant asteroid populations, 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 ]

Object Listings -- smallest objects first [ Alpha Index | 48 Hours | top ]
2006 HE2 (K06H02E) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 17 meters per JPL H=26.51, MPC H=26.5 This object has been listed as an impact risk since 20 April 2006. JPL classifies 2006 HE2 as an Apollo and calculates an Earth MOID of 0.004429 AU (1.72 LD), and reports this object passed Earth at 2.7 lunar distances (LD) on 22 April 2006 at 1336 UT. Observations are reported from the following observatories in MPECs 2006-H15 and 2006-H31: Catalina Sky Survey (CSS) [703] 2006-04-19 0942-1138, 12 pos in MPEC 2006-H15, discovery (*) 2006-04-20 1005-1015, 8 pos in MPEC 2006-H15, confirmation Farpoint Obs. [734] 2006-04-20 0519-0533, 6 pos in MPEC 2006-H15, confirmation Sabino Canyon Obs. [854] 2006-04-20 0632-0637, 3 pos in MPEC 2006-H15, confirmation Mt. Lemmon Survey (MLS) [G96] 2006-04-20 0906-0907, 4 pos in MPEC 2006-H15, confirmation Faulkes Telescope North [F65{1}] coded to UKAPP 2006-04-22 1239-1241, 3 pos in MPEC 2006-H31, follow-up 2006 HC (K06H00C) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 26 meters per JPL H=25.54, MPC H=25.5 JPL classifies 2006 HC as an Amor and calculates an Earth MOID of 0.024349 AU (9.47 LD), and reports this object will pass Earth at 9.5 LD on 24 April 2006 at about 1010 UT. Observations are reported from the following observatories in MPECs 2006-H08 and 2006-H27: Catalina Sky Survey (CSS) [703] 2006-04-18 0712-0816, 8 pos in MPEC 2006-H08, discovery (*) Gnosca Obs. [143] 2006-04-18 2022-2059, 3 pos in MPEC 2006-H08, confirmation Great Shefford Obs. [J95] 2006-04-18 2132-2137, 2 pos in MPEC 2006-H08, confirmation Farpoint Obs. [734] 2006-04-19 0352-0414, 3 pos in MPEC 2006-H08, confirmation Table Mountain Obs. [673{5}] coded to Jim Young 2006-04-19 0401-0422, 4 pos in MPEC 2006-H08, confirmation Sabino Canyon Obs. [854] 2006-04-19 0431-0441, 3 pos in MPEC 2006-H08, confirmation 2006-04-19 0656-0708, 6 pos in MPEC 2006-H08, confirmation Mt. Lemmon Survey (MLS) [G96] 2006-04-19 0525-0613, 4 pos in MPEC 2006-H08, confirmation Whipple Obs. [696{1}] coded to Carl Hergenrother 2006-04-21 0545-0547, 3 pos in MPEC 2006-H27, follow-up Sandlot Obs. [H36] 2006-04-22 0451-0500, 3 pos in MPEC 2006-H27, follow-up 2006 HZ5 (K06H05Z) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 38 meters per JPL H=24.75, MPC H=24.7 JPL classifies 2006 HZ5 as an Apollo and calculates an Earth MOID of 0.010752 AU (4.18 LD), and reports this object passed Earth at 7.4 LD on 2 April 2006 at about 0625 UT. Observations are reported from the following observatories in MPEC 2006-H23: Spacewatch 0.9m telescope [691] 2006-04-20 0900-0950, 3 pos in MPEC 2006-H23, discovery (*) Spacewatch 1.8m telescope [291] 2006-04-20 1106-1121, 3 pos in MPEC 2006-H23, confirmation 2006-04-21 0741-0753, 3 pos in MPEC 2006-H23, confirmation Farpoint Obs. [734] 2006-04-21 0708-0714, 3 pos in MPEC 2006-H23, confirmation Mt. Lemmon Survey (MLS) [G96] 2006-04-21 0829-0912, 4 pos in MPEC 2006-H23, confirmation Grasslands Obs. [651] 2006-04-21 0941-0944, 3 pos in MPEC 2006-H23, confirmation 2006 GC (K06G00C) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 44 meters per JPL H=24.45, MPC H=24.4 This object was listed from 4 until 7 April 2006 as an impact risk. JPL classifies 2006 GC as an Apollo and calculates an Earth MOID of 0.038079 AU (14.82 LD), and reports this object passed Earth at 16.3 LD on 16 April 2006. Observations are reported from the following observatories in MPEC 2006-H02: Great Shefford Obs. [J95] 2006-04-17 0147-0201, 3 pos in MPEC 2006-H02, follow-up See also information from the week ending 16 April 2006. 2006 HW5 (K06H05W) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 45 meters per JPL H=24.36, MPC H=24.4 This object has been listed as an impact risk since 22 April 2006. JPL classifies 2006 HW5 as an Amor and calculates an Earth MOID of 0.026790 AU (10.42 LD), and reports this object will pass Earth at 17.7 LD on 28 April 2006. Observations are reported from the following observatories in MPEC 2006-H20: Mt. Lemmon Survey (MLS) [G96] 2006-04-20 0441-0620, 8 pos in MPEC 2006-H20, discovery (*) Farpoint Obs. [734] 2006-04-21 0334-0343, 3 pos in MPEC 2006-H20, confirmation Grasslands Obs. [651] 2006-04-21 0345-0428, 5 pos in MPEC 2006-H20, confirmation 2006 HF6 (K06H06F) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 47 meters per JPL H=24.29, MPC H=24.3 This object has been listed as an impact risk since 22 April 2006. JPL classifies 2006 HF6 as an Apollo and calculates an Earth MOID of 0.002721 AU (1.06 LD), and reports this object passed Earth at 1.9 LD on 18 April 2006 at about 0829 UT. Lowell Observatory reports 2006 HF6 has an MOID of 0.01506 AU (5.86 LD) with Venus. Observations are reported from the following observatories in MPECs 2006-H25, 2006-H27, and 2006-H31: Catalina Sky Survey (CSS) [703] 2006-04-21 0802-0923, 8 pos in MPEC 2006-H25, discovery (*) LINEAR [704] 2006-04-21 0825-0934, 5 pos in MPEC 2006-H27, follow-up Siding Spring Survey (SSS) [E12] 2006-04-21 1556-1641, 4 pos in MPEC 2006-H25, confirmation Faulkes Telescope North [F65{1}] coded to UKAPP 2006-04-22 1215-1217, 3 pos in MPEC 2006-H31, follow-up 2006 FH (K06F00H) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 48 meters per JPL H=24.26, MPC H=24.3 JPL classifies 2006 FH as an Amor and calculates an Earth MOID of 0.047163 AU (18.35 LD), and reports this object passed Earth at 18.7 LD on 15 April 2006. Observations are reported from the following observatories in MPECs 2006-H05 and 2006-H12: Naef Obs. [A13] 2006-04-19 0039-0056, 4 pos in MPEC 2006-H05, follow-up 2006-04-19 2230-2321, 3 pos in MPEC 2006-H12, follow-up See also information from the week ending 9 April 2006. 2006 GB1 (K06G01B) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 50 meters per JPL H=24.14, MPC H=24.1 JPL classifies 2006 GB1 as an Apollo and calculates an Earth MOID of 0.009792 AU (3.81 LD), and reports this object will pass Earth at 14.7 LD on 27 April 2006. Observations are reported from the following observatories in MPECs 2006-H02 and 2006-H12: Farpoint Obs. [734] 2006-04-17 0510-0517, 3 pos in MPEC 2006-H02, follow-up Catalina Sky Survey (CSS) [703] 2006-04-19 0510-0545, 4 pos in MPEC 2006-H12, follow-up See also information from the week ending 16 April 2006. 2006 EB1 (K06E01B) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 68 meters per JPL H=23.48, MPC H=23.4 JPL classifies 2006 EB1 as an Amor and calculates an Earth MOID of 0.035275 AU (13.73 LD), and reports this object passed Earth at 14.7 LD on 1 March 2006. Observations are reported from the following observatories in MPEC 2006-H12: Spacewatch 1.8m telescope [291] 2006-04-19 1034-1046, 3 pos in MPEC 2006-H12, follow-up (H) See also information from the week ending 12 March 2006. 2006 FV (K06F00V) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 81 meters per JPL H=23.10, MPC H=23.1 JPL classifies 2006 FV as an Amor and calculates an Earth MOID of 0.108290 AU (42.14 LD). Lowell Observatory reports 2006 FV has an MOID of 0.03960 AU (15.41 LD) with Mars. Observations are reported from the following observatories in MPEC 2006-H12: Spacewatch 1.8m telescope [291] 2006-04-19 0823-0834, 3 pos in MPEC 2006-H12, follow-up (H) See also information from the week ending 9 April 2006. 2006 FH36 (K06F36H) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 89 meters per JPL H=22.90, MPC H=22.9 JPL classifies 2006 FH36 as an Aten and calculates an Earth MOID of 0.015398 AU (5.99 LD), and reports this object passed Earth at 11.6 LD on 30 March 2006. Lowell Observatory reports 2006 FH36 has an MOID of 0.04398 AU (17.11 LD) with Venus. Observations are reported from the following observatories in MPECs 2006-H12 and 2006-H27: Farpoint Obs. [734] 2006-04-19 0640-0653, 3 pos in MPEC 2006-H12, follow-up Siding Spring Survey (SSS) [E12] 2006-04-21 1139-1222, 4 pos in MPEC 2006-H27, follow-up See also information from the week ending 9 April 2006. 2000 SJ344 (K00SY4J) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 104 meters per JPL H=22.57, MPC H=22.6 JPL classifies 2000 SJ344 as an Apollo and calculates an Earth MOID of 0.046576 AU (18.12 LD). Observations are reported from the following observatories in MPEC 2006-H16: Mauna Kea [568{2}] coded to David Tholen et al. 2005-05-05 1442-1447, 2 pos in MPEC 2006-H16, follow-up 2005-06-09 1412-1416, 2 pos in MPEC 2006-H16, 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=22.4 JPL classifies 2006 CW as an Amor and calculates an Earth MOID of 0.153265 AU (59.64 LD). Observations are reported from the following observatories in MPEC 2006-H05: Spacewatch 1.8m telescope [291] 2006-04-18 1043-1055, 3 pos in MPEC 2006-H05, follow-up See also information from the week ending 26 March 2006. 2006 DT63 (K06D63T) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 118 meters per JPL H=22.29, MPC H=22.3 This object was listed from 1 until 4 March 2006 as an impact risk. JPL classifies 2006 DT63 as an Amor and calculates an Earth MOID of 0.267927 AU (104.25 LD). Observations are reported from the following observatories in MPEC 2006-H12: Spacewatch 1.8m telescope [291] 2006-04-19 0655-0712, 3 pos in MPEC 2006-H12, follow-up See also information from the week ending 26 March 2006.
48+120 Hours [ Objects Listings (size order) | Object Index (alpha/xref) | top ]
Observations of 14 small objects were reported during the last 168 hours: 2000 SJ344, 2006 CW, 2006 DT63, 2006 EB1, 2006 FH, 2006 FH36, 2006 FV, 2006 GB1, 2006 GC, 2006 HC, 2006 HE2, 2006 HF6, 2006 HW5 & 2006 HZ5 in MPECs: 2006-H02 time-stamped 2006 Apr. 17, 06:08 UT - Daily Orbit Update 2006-H05 time-stamped 2006 Apr. 19, 06:09 UT - Daily Orbit Update 2006-H08 time-stamped 2006 Apr. 19, 11:07 UT - 2006 HC 2006-H12 time-stamped 2006 Apr. 20, 06:08 UT - Daily Orbit Update 2006-H15 time-stamped 2006 Apr. 20, 12:06 UT - 2006 HE2 2006-H16 time-stamped 2006 Apr. 20, 12:08 UT - 2000 SJ344 2006-H20 time-stamped 2006 Apr. 21, 17:21 UT - 2006 HW5 2006-H23 time-stamped 2006 Apr. 21, 17:29 UT - 2006 HZ5 2006-H25 time-stamped 2006 Apr. 21, 18:40 UT - 2006 HF6 2006-H27 time-stamped 2006 Apr. 22, 06:09 UT - Daily Orbit Update 2006-H31 time-stamped 2006 Apr. 23, 06:10 UT - Daily Orbit Update Date & times for other sources that were parsed to compile this page: JPL Close Approaches, downloaded at 2006 April 23, 1534 UTC JPL NEO Orbital Elements, downloaded at 2006 April 23, 1539 UTC Lowell Observatory Orbit intersections, time-stamped 2006 Apr 23 1308:59 UTC MPC NEA.DAT from MPC mirror, downloaded at 2006 April 23, 1534 UTC Risk monitoring sites, as of A/CC's check at 2006 April 23, 1542 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 21 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 FV 2006-04-24 0.108290 81 23.10 26 - (22 April) 2006 HE2 2006-04-25 0.004429 17 26.51 3 - risk listed - (23 April) 2006 EE 2006-04-27 0.060515 70 23.41 8 - past obs. - (12 March) 2006 DT63 2006-04-27 0.267927 118 22.29 51 - was risk listed - (22 April) 2002 FT6 2006-05-01 0.040999 120 22.26 3op - (11 Feb.) 2006 GB1 2006-05-01 0.009792 50 24.14 17 - (22 April) 2006 EY 2006-05-04 0.048691 31 25.16 21 - past obs. - (29 March) 2002 GK1 2006-05-05 0.004309 114 22.36 6 - faint recov. poss. - (22 Jan.) 2006 HF6 2006-05-08 0.002721 47 24.29 1 - risk listed - (23 April) 2003 SN214 2006-05-09 0.074328 87 22.94 34 - (11 Feb.) 2002 GD10 2006-05-11 0.060027 121 22.23 85 - faint recov. poss. - (15 Dec.) 2006 HC 2006-05-18 0.024349 26 25.54 4 - (22 April) 2006 FH 2006-05-20 0.047163 48 24.26 28 - (22 April) 2004 RQ252 2006-05-22 0.000443 115 22.34 23 - risk listed - (5 March) 2006 HZ5 2006-05-25 0.010752 38 24.75 1 - (22 April) 2006 CL9 2006-05-26 0.039810 96 22.73 48 - past obs. - (5 April) 2006 HW5 2006-05-30 0.026790 45 24.36 1 - risk listed - (22 April) 2006 CW 2006-06-01 0.153265 109 22.47 74 - (19 April) 2006 FH36 2006-06-04 0.015398 89 22.90 21 - (22 April) 2005 YM128 2006-06-30 0.029697 56 23.91 13 - past obs. - (5 March) 2005 YA37 2006-07-09 0.035667 111 22.43 26 - past obs. - (4 Feb.) Coming into view soon: 2000 SJ344 2006-06-11 0.046576 104 22.57 2op - >29 April, faint recov. poss. - (20 April) Viewing by designation order - see also Viewing by date order Object View until MOID AU Dia H Arc Notes (calc date) ---------- ---------- -------- --- ----- --- - ----------------------- 2006 HF6 2006-05-08 0.002721 47 24.29 1 - risk listed - (23 April) 2006 HZ5 2006-05-25 0.010752 38 24.75 1 - (22 April) 2006 HW5 2006-05-30 0.026790 45 24.36 1 - risk listed - (22 April) 2006 HE2 2006-04-25 0.004429 17 26.51 3 - risk listed - (23 April) 2006 HC 2006-05-18 0.024349 26 25.54 4 - (22 April) 2006 GB1 2006-05-01 0.009792 50 24.14 17 - (22 April) 2006 FH36 2006-06-04 0.015398 89 22.90 21 - (22 April) 2006 FV 2006-04-24 0.108290 81 23.10 26 - (22 April) 2006 FH 2006-05-20 0.047163 48 24.26 28 - (22 April) 2006 EY 2006-05-04 0.048691 31 25.16 21 - past obs. - (29 March) 2006 EE 2006-04-27 0.060515 70 23.41 8 - past obs. - (12 March) 2006 DT63 2006-04-27 0.267927 118 22.29 51 - was risk listed - (22 April) 2006 CL9 2006-05-26 0.039810 96 22.73 48 - past obs. - (5 April) 2006 CW 2006-06-01 0.153265 109 22.47 74 - (19 April) 2005 YM128 2006-06-30 0.029697 56 23.91 13 - past obs. - (5 March) 2005 YA37 2006-07-09 0.035667 111 22.43 26 - past obs. - (4 Feb.) 2004 RQ252 2006-05-22 0.000443 115 22.34 23 - risk listed - (5 March) 2003 SN214 2006-05-09 0.074328 87 22.94 34 - (11 Feb.) 2002 GD10 2006-05-11 0.060027 121 22.23 85 - faint recov. poss. - (15 Dec.) 2002 GK1 2006-05-05 0.004309 114 22.36 6 - faint recov. poss. - (22 Jan.) 2002 FT6 2006-05-01 0.040999 120 22.26 3op - (11 Feb.) 2000 SJ344 2006-06-11 0.046576 104 22.57 2op - >29 April, faint recov. poss. - (20 April) 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 ]
ObjectObserved by MPC code
2000 SJ344568
2006 CW291
2006 DT63291
2006 EB1291
2006 FHA13
2006 FH36734, E12
2006 FV291
2006 GB1703, 734
2006 GCJ95
2006 HC143, 673, 696, 703, 734, 854, G96, H36, J95
2006 HE2703, 734, 854, F65, G96
2006 HF6703, 704, E12, F65
2006 HW5651, 734, G96
2006 HZ5291, 651, 691, 734, G96
CodeObservatoryObjects Observed
143Gnosca Obs. 2006 HC
291Spacewatch 1.8m telescope 2006 CW, 2006 DT63, 2006 EB1, 2006 FV, 2006 HZ5
5682Mauna Kea - David Tholen et al.2000 SJ344
651Grasslands Obs. 2006 HW5, 2006 HZ5
6735Table Mountain Obs. - Jim Young2006 HC
691Spacewatch 0.9m telescope 2006 HZ5
6961Whipple Obs. - Carl Hergenrother2006 HC
703Catalina Sky Survey (CSS) 2006 GB1, 2006 HC, 2006 HE2, 2006 HF6
704LINEAR 2006 HF6
734Farpoint Obs. 2006 FH36, 2006 GB1, 2006 HC, 2006 HE2, 2006 HW5, 2006 HZ5
854Sabino Canyon Obs. 2006 HC, 2006 HE2
A13Naef Obs. 2006 FH
E12Siding Spring Survey (SSS) 2006 FH36, 2006 HF6
F651Faulkes Telescope North - UKAPP2006 HE2, 2006 HF6
G96Mt. Lemmon Survey (MLS) 2006 HC, 2006 HE2, 2006 HW5, 2006 HZ5
H36Sandlot Obs. 2006 HC
J95Great Shefford Obs. 2006 GC, 2006 HC
[ object listings | index | 48 Hours | viewing | top ]

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