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Earth's Busy Neighborhood

    ACC's Small Object Report for 8-14 May 2006    

A semi-automated report compiled on 14 May 2006 at 2359 UTC

There are seven small asteroids reported in the last 168 hours, during which three were newly discovered.
Currently 1,049 NEAs are listed with H>22.0 by JPL and/or the MPC (870 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 ]

Object Listings -- smallest objects first [ Alpha Index | 48 Hours | top ]
2006 JY26 (K06J26Y) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 7 meters per JPL H=28.35, MPC H=28.4 This object has been listed as an impact risk since 8 May 2006. JPL classifies 2006 JY26 as an Aten and calculates an Earth MOID of 0.001671 AU (0.65 LD), and reports this object passed Earth at 1.1 lunar distances (LD) on 10 May 2006 at 0010 UT. Observations are reported from the following observatories in MPECs 2006-J38, 2006-J39, 2006-J42, and 2006-J43: Catalina Sky Survey (CSS) [703] 2006-05-06 0831-1019, 12 pos in MPEC 2006-J38, discovery (*) 2006-05-07 0615-0715, 8 pos in MPEC 2006-J38, confirmation Grasslands Obs. [651] 2006-05-06 1045-1050, 3 pos in MPEC 2006-J38, confirmation Table Mountain Obs. [673{5}] coded to Jim Young 2006-05-08 0351-0506, 6 pos in MPEC 2006-J38, confirmation Mt. Lemmon Survey (MLS) [G96] 2006-05-08 0435-0436, 4 pos in MPEC 2006-J38, confirmation 2006-05-09 0329-0344, 24 pos in MPECs 2006-J43 -J42, follow-up 2006-05-10 0405-0411, 12 pos in MPEC 2006-J43, follow-up Siding Spring Survey (SSS) [E12] 2006-05-08 1048-1050, 4 pos in MPEC 2006-J42, follow-up Great Shefford Obs. [J95] 2006-05-08 2108-2120, 4 pos in MPEC 2006-J39, follow-up 2006 JV26 (K06J26V) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 31 meters per JPL H=25.19, MPC H=25.2 JPL classifies 2006 JV26 as an Apollo and calculates an Earth MOID of 0.005635 AU (2.19 LD), and reports this object passed Earth at 2.5 LD on 9 May 2006 at 0218 UT. Lowell Observatory reports 2006 JV26 has an MOID of 0.01000 AU (3.89 LD) with Venus. Observations are reported from the following observatories in MPECs 2006-J37 and 2006-J39: Catalina Sky Survey (CSS) [703] 2006-05-08 0942-1127, 19 pos in MPEC 2006-J37, discovery (*) Siding Spring Survey (SSS) [E12] 2006-05-08 1254-1315, 33 pos in MPEC 2006-J37, confirmation 2006-05-08 1428-1538, 10 pos in MPEC 2006-J39, follow-up Great Shefford Obs. [J95] 2006-05-08 2126-2156, 5 pos in MPEC 2006-J39, follow-up 2006 JT41 (K06J41T) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 37 meters per JPL H=24.78, MPC H=24.8 JPL classifies 2006 JT41 as an Amor and calculates an Earth MOID of 0.055973 AU (21.78 LD), and reports this object passed Earth at 22.6 LD on 16 April 2006. Lowell Observatory reports 2006 JT41 has an MOID of 0.04782 AU (18.61 LD) with Mars. Observations are reported from the following observatories in MPEC 2006-J40: Spacewatch 0.9m telescope [691] 2006-05-06 0911-1002, 3 pos in MPEC 2006-J40, discovery (*) Spacewatch 1.8m telescope [291] 2006-05-08 0801-0812, 3 pos in MPEC 2006-J40, confirmation 2006-05-09 0604-0640, 4 pos in MPEC 2006-J40, confirmation (tH) 2006 HZ5 (K06H05Z) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 41 meters per JPL H=24.61, MPC H=24.5 JPL classifies 2006 HZ5 as an Apollo and calculates an Earth MOID of 0.010913 AU (4.25 LD), and reports this object passed Earth at 7.4 LD on 2 April 2006 at about 0312 UT. Observations are reported from the following observatories in MPECs 2006-J33 and 2006-J39: Jornada Obs. [715] 2006-05-07 0557-0619, 3 pos in MPEC 2006-J33, follow-up (I) Kanab Obs. [682] 2006-05-08 0634-0721, 2 pos in MPEC 2006-J39, follow-up Spacewatch 1.8m telescope [291] 2006-05-08 0705-0717, 3 pos in MPEC 2006-J39, follow-up See also information from the week ending 7 May 2006. 2006 HF6 (K06H06F) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 43 meters per JPL H=24.47, MPC H=24.4 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 0.002724 AU (1.06 LD), and reports this object passed Earth at 1.9 LD on 18 April 2006 at 0829 UT. Lowell Observatory reports 2006 HF6 has an MOID of 0.01555 AU (6.05 LD) with Venus. Observations are reported from the following observatories in MPEC 2006-J33: Spacewatch 1.8m telescope [291] 2006-05-07 0457-0536, 3 pos in MPEC 2006-J33, follow-up (H) See also information from the week ending 7 May 2006. 2006 JM6 (K06J06M) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 64 meters per JPL H=23.61, MPC H=23.6 JPL classifies 2006 JM6 as an Amor and calculates an Earth MOID of 0.031896 AU (12.41 LD), and reports this object passed Earth at 19.0 LD on 14 May 2006. Observations are reported from the following observatories in MPEC 2006-J43: Siding Spring Survey (SSS) [E12] 2006-05-10 1014-1017, 4 pos in MPEC 2006-J43, follow-up See also information from the week ending 7 May 2006. 2005 SP1 (K05S01P) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 77 meters per JPL H=23.23, MPC H=23.2 This object was listed from 25 Sept. 2005 until 11 May 2006 as an impact risk. JPL classifies 2005 SP1 as an Apollo and calculates an Earth MOID of 0.014003 AU (5.45 LD), and reports this object passed Earth at 5.7 LD on 15 Sept. at 1838 UT. Lowell Observatory reports 2005 SP1 has an MOID of 0.03237 AU (12.6 LD) with Mars. Observations are reported from the following observatories in MPEC 2006-J43: Andrushivka Obs. [A50] 2005-09-25 2219-2231, 4 pos in MPEC 2006-J43, follow-up
48+120 Hours [ Objects Listings (size order) | Object Index (alpha/xref) | top ]
Observations of seven small objects were reported during the last 168 hours: 2005 SP1, 2006 HF6, 2006 HZ5, 2006 JM6, 2006 JT41, 2006 JV26 & 2006 JY26 in MPECs: 2006-J33 time-stamped 2006 May 8, 06:10 UT - Daily Orbit Update 2006-J37 time-stamped 2006 May 8, 14:12 UT - 2006 JV26 2006-J38 time-stamped 2006 May 8, 18:07 UT - 2006 JY26 2006-J39 time-stamped 2006 May 9, 06:10 UT - Daily Orbit Update 2006-J40 time-stamped 2006 May 9, 21:26 UT - 2006 JT41 2006-J42 time-stamped 2006 May 10, 06:10 UT - Daily Orbit Update 2006-J43 time-stamped 2006 May 11, 06:11 UT - Daily Orbit Update Date & times for other sources that were parsed to compile this page: JPL Close Approaches, downloaded at 2006 May 13, 1503 UTC JPL NEO Orbital Elements, downloaded at 2006 May 13, 1506 UTC Lowell Observatory Orbit intersections, time-stamped 2006 May 13 0827:19 UTC MPC NEA.DAT from MPC mirror, downloaded at 2006 May 13, 1501 UTC Risk monitoring sites, as of A/CC's check at 2006 May 15, 0003 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 18 small objects as being currently in view, including 15 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 HX30 2006-05-17 0.018538 20 26.12 7 - past obs. - (3 May) 2006 FH 2006-05-20 0.047163 48 24.26 28 - past obs. - (22 April) 2006 HC 2006-05-20 0.024345 27 25.48 12 - past obs. - (2 May) 2006 HV50 2006-05-21 0.033033 70 23.41 7 - past obs. - (4 May) 2004 RQ252 2006-05-22 0.000443 115 22.34 23 - risk listed - (5 March) 2006 JP 2006-05-25 0.151563 61 23.72 1 - past obs. - (3 May) 2006 CL9 2006-05-26 0.039810 96 22.73 48 - past obs. - (5 April) 2006 HZ5 2006-05-28 0.010913 41 24.61 17 - (9 May) 2006 HW5 2006-05-31 0.027256 47 24.27 13 - past obs. - (4 May) 2006 CW 2006-06-01 0.153265 109 22.47 74 - past obs. - (19 April) 2006 FH36 2006-06-04 0.015393 87 22.94 31 - past obs. - (4 May) 2006 JT41 2006-06-05 0.055973 37 24.78 3 - (9 May) 2000 SJ344 2006-06-11 0.046576 104 22.57 3op - "only one night" - past obs. - (2 May) 2006 HW50 2006-06-11 0.020646 46 24.32 14 - past obs. - (7 May) 2006 JM6 2006-06-25 0.031896 64 23.61 5 - (11 May) 2005 YM128 2006-06-30 0.029665 55 23.93 125 - past obs. - (7 May) 2005 YA37 2006-07-09 0.035667 110 22.45 128 - past obs. - (4 May) 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 JT41 2006-06-05 0.055973 37 24.78 3 - (9 May) 2006 JM6 2006-06-25 0.031896 64 23.61 5 - (11 May) 2006 JP 2006-05-25 0.151563 61 23.72 1 - past obs. - (3 May) 2006 HW50 2006-06-11 0.020646 46 24.32 14 - past obs. - (7 May) 2006 HV50 2006-05-21 0.033033 70 23.41 7 - past obs. - (4 May) 2006 HX30 2006-05-17 0.018538 20 26.12 7 - past obs. - (3 May) 2006 HZ5 2006-05-28 0.010913 41 24.61 17 - (9 May) 2006 HW5 2006-05-31 0.027256 47 24.27 13 - past obs. - (4 May) 2006 HC 2006-05-20 0.024345 27 25.48 12 - past obs. - (2 May) 2006 FH36 2006-06-04 0.015393 87 22.94 31 - past obs. - (4 May) 2006 FH 2006-05-20 0.047163 48 24.26 28 - past obs. - (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 - past obs. - (19 April) 2005 YM128 2006-06-30 0.029665 55 23.93 125 - past obs. - (7 May) 2005 YA37 2006-07-09 0.035667 110 22.45 128 - past obs. - (4 May) 2004 RQ252 2006-05-22 0.000443 115 22.34 23 - risk listed - (5 March) 2000 SJ344 2006-06-11 0.046576 104 22.57 3op - "only one night" - past obs. - (2 May) 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 ]
ObjectObserved by MPC code
2005 SP1  A50
2006 HF6291
2006 HZ5291, 682, 715
2006 JM6E12
2006 JT41291, 691
2006 JV26703, E12, J95
2006 JY26651, 673, 703, E12, G96, J95
CodeObservatoryObjects Observed
291Spacewatch 1.8m telescope 2006 HF6, 2006 HZ5, 2006 JT41
651Grasslands Obs. 2006 JY26
6735Table Mountain Obs. - Jim Young2006 JY26
682Kanab Obs. 2006 HZ5
691Spacewatch 0.9m telescope 2006 JT41
703Catalina Sky Survey (CSS) 2006 JV26, 2006 JY26
715Jornada Obs. 2006 HZ5
A50Andrushivka Obs. 2005 SP1
E12Siding Spring Survey (SSS) 2006 JM6, 2006 JV26, 2006 JY26
G96Mt. Lemmon Survey (MLS) 2006 JY26
J95Great Shefford Obs. 2006 JV26, 2006 JY26
[ object listings | index | 48 Hours | viewing | top ]

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