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Earth's Busy Neighborhood

    ACC's Small Object Report for 27 March - 2 April 2006    

A semi-automated report compiled on 3 April 2006 at 0000 UTC

There are five* small objects reported in the last 168 hours, during which one was newly discovered.
*One probably larger object is also included in this week's report.
Currently 1025 NEAs are listed with H>22.0 by JPL and/or the Minor Planet Center (845 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 FU (K06F00U) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 26 meters per JPL H=25.59, MPC H=25.6 JPL classifies 2006 FU as an Apollo and calculates an Earth MOID of 0.009077 AU (3.53 LD), and reports this object passed Earth at 3.8 lunar distances (LD) on 28 March 2006 at 0432 UT. Observations are reported from the following observatories in MPEC 2006-F41: Great Shefford Obs. [J95] 2006-03-27 2149-2149, 2 pos in MPEC 2006-F41, follow-up See also information from the week ending 26 March 2006. 2006 FH (K06F00H) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 43 meters per JPL H=24.48, MPC H=24.5 JPL classifies 2006 FH as an Amor and calculates an Earth MOID of 0.046704 AU (18.17 LD), and reports this object will pass Earth at 18.6 LD on 15 April 2006. Observations are reported from the following observatories in MPEC 2006-F45: Farpoint Obs. [734] 2006-03-29 0508-0533, 4 pos in MPEC 2006-F45, follow-up See also information from the week ending 26 March 2006. 2006 FV (K06F00V) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 82 meters per JPL H=23.07, MPC H=23.0 JPL classifies 2006 FV as an Amor and calculates an Earth MOID of 0.108320 AU (42.15 LD). Lowell Observatory reports 2006 FV has an MOID of 0.04555 AU (17.72 LD) with Mars. Observations are reported from the following observatories in MPECs 2006-F37 and 2006-F45: Desert Moon Obs. [448] 2006-03-26 0735-0800, 3 pos in MPEC 2006-F37, follow-up Farpoint Obs. [734] 2006-03-29 0548-0601, 3 pos in MPEC 2006-F45, follow-up See also information from the week ending 26 March 2006. 2006 FH36 (K06F36H) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 87 meters per JPL H=22.95, MPC H=22.9 JPL classifies 2006 FH36 as an Aten and calculates an Earth MOID of 0.015537 AU (6.05 LD), and reports this object passed Earth at 11.6 LD on 30 March 2006. Lowell Observatory reports 2006 FH36 has an MOID of 0.04360 AU (16.96 LD) with Venus. Observations are reported from the following observatories in MPEC 2006-G04: Siding Spring Survey (SSS) [E12] 2006-03-31 1041-1110, 4 pos in MPEC 2006-G04, discovery (*) 2006-03-31 1242-1248, 4 pos in MPEC 2006-G04, confirmation 2006-04-01 0941-0943, 4 pos in MPEC 2006-G04, confirmation 2006-04-01 1228-1247, 3 pos in MPEC 2006-G04, confirmation Mt. John Obs. [474] 2006-03-31 1254-1321, 5 pos in MPEC 2006-G04, confirmation 2006-04-01 0816-0821, 3 pos in MPEC 2006-G04, confirmation 2006-04-01 0934-0946, 3 pos in MPEC 2006-G04, confirmation Reedy Creek Obs. [428] 2006-04-01 0951-0958, 3 pos in MPEC 2006-G04, confirmation 2006 FW (K06F00W) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 93 meters per JPL H=22.81, MPC H=22.8 This object was listed from 26 until 30 March 2006 as an impact risk. JPL classifies 2006 FW as an Apollo and calculates an Earth MOID of 0.087012 AU (33.86 LD). Observations are reported from the following observatories in MPEC 2006-F52: Spacewatch 1.8m telescope [291] 2006-03-29 0314-0325, 3 pos in MPEC 2006-F52, follow-up (H) See also information from the week ending 26 March 2006. 2006 FW33 (K06F33W) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 320 meters per JPL H=20.12, MPC H=20.2 -- not small This object has been listed as an impact risk since 29 March 2006. JPL classifies 2006 FW33 as an Apollo and calculates an Earth MOID of 0.065878 AU (25.63 LD). Lowell Observatory reports 2006 FW33 has significant MOIDs with planets Mercury (0.01990 AU = 7.74 LD) and Mars (0.03830 AU = 14.9 LD). Observations are reported from the following observatories in MPEC 2006-F47: Mt. Lemmon Survey (MLS) [G96] 2006-03-26 0702-0846, 7 pos in MPEC 2006-F47, discovery (*) Spacewatch 1.8m telescope [291] 2006-03-29 0428-0445, 3 pos in MPEC 2006-F47, confirmation (H)
48+120 Hours [ Objects Listings (size order) | Object Index (alpha/xref) | top ]
Observations of six small objects were reported during the last 168 hours: 2006 FH, 2006 FH36, 2006 FU, 2006 FV, 2006 FW & 2006 FW33 in MPECs: 2006-F37 time-stamped 2006 Mar. 27, 07:07 UT - Daily Orbit Update 2006-F41 time-stamped 2006 Mar. 28, 07:07 UT - Daily Orbit Update 2006-F45 time-stamped 2006 Mar. 29, 07:07 UT - Daily Orbit Update 2006-F47 time-stamped 2006 Mar. 29, 16:24 UT - 2006 FW33 2006-F52 time-stamped 2006 Mar. 30, 07:07 UT - Daily Orbit Update 2006-G04 time-stamped 2006 Apr. 1, 13:07 UT - 2006 FH36 Date & times for other sources that were parsed to compile this page: JPL Close Approaches, downloaded at 2006 April 2, 2354 UTC JPL NEO Orbital Elements, downloaded at 2006 April 2, 2351 UTC Lowell Observatory Orbit intersections, time-stamped 2006 Apr 02 1248:45 UTC MPC NEA.DAT from MPC mirror, downloaded at 2006 April 2, 2352 UTC Risk monitoring sites, as of A/CC's check at 2006 April 2, 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 25 small objects as being currently in view, including 20 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 FW 2006-04-03 0.087012 93 22.81 4 - was risk listed - (30 March) 2006 EF1 2006-04-05 0.028321 91 22.86 4 - past obs. - (11 March) 2006 EK53 2006-04-05 0.013657 84 23.03 14 - past obs. - (29 March) 2006 DD42 2006-04-05 0.127327 56 23.92 29 - past obs. - (29 March) 2006 EJ53 2006-04-06 0.286309 114 22.36 17 - past obs. - (29 March) 2006 EW 2006-04-09 0.029542 66 23.54 17 - past obs. - (29 March) 2006 EW52 2006-04-09 0.143728 126 22.14 20 - past obs. - (29 March) 2006 FW33 2006-04-11 0.065878 320 20.12 3 - risk listed - nominally not small - (29 March) 2006 DM 2006-04-12 0.078535 51 24.09 31 - past obs. - (29 Feb.) 2003 FK1 2006-04-14 0.013874 112 22.41 8 - faint recov. poss. - (22 Jan.) 2006 DN 2006-04-15 0.004389 43 24.48 32 - past obs. - (29 March) 2006 EB1 2006-04-16 0.035213 68 23.48 3 - past obs. - (12 March) 2005 XO4 2006-04-20 0.021856 126 22.14 23 - past obs. - (7 Jan.) 2006 FV 2006-04-25 0.108320 82 23.07 5 - (29 March) 2006 FL10 2006-04-25 2 - nominally not small - (29 March) 2006 EE 2006-04-27 0.060515 70 23.41 8 - past obs. - (12 March) 2006 DT63 2006-04-29 0.267903 120 22.25 24 - past obs. - (29 March) 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.) 2002 GD10 2006-05-11 0.060027 121 22.23 85 - faint recov. poss. - (15 Dec.) 2006 FH 2006-05-16 0.046704 43 24.48 6 - (29 March) 2006 CL9 2006-05-26 0.039810 97 22.72 47 - past obs. - (29 March) 2006 CW 2006-06-01 0.153258 110 22.45 45 - past obs. - (29 March) 2006 FH36 2006-06-04 0.015537 87 22.95 1 - (3 April) 2005 YA37 2006-07-09 0.035667 111 22.43 26 - past obs. - (4 Feb.) Coming into view soon: 2002 FT6 2006-05-01 0.040999 120 22.26 3op - >4 April - (11 Feb.) 2003 SN214 2006-05-09 0.074328 87 22.94 34 - >3 April - (11 Feb.) Viewing by designation order - see also Viewing by date order Object View until MOID AU Dia H Arc Notes (calc date) ---------- ---------- -------- --- ----- --- - ----------------------- 2006 FH36 2006-06-04 0.015537 87 22.95 1 - (3 April) 2006 FW33 2006-04-11 0.065878 320 20.12 3 - risk listed - nominally not small - (29 March) 2006 FL10 2006-04-25 2 - nominally not small - (29 March) 2006 FW 2006-04-03 0.087012 93 22.81 4 - was risk listed - (30 March) 2006 FV 2006-04-25 0.108320 82 23.07 5 - (29 March) 2006 FH 2006-05-16 0.046704 43 24.48 6 - (29 March) 2006 EK53 2006-04-05 0.013657 84 23.03 14 - past obs. - (29 March) 2006 EJ53 2006-04-06 0.286309 114 22.36 17 - past obs. - (29 March) 2006 EW52 2006-04-09 0.143728 126 22.14 20 - past obs. - (29 March) 2006 EF1 2006-04-05 0.028321 91 22.86 4 - past obs. - (11 March) 2006 EB1 2006-04-16 0.035213 68 23.48 3 - past obs. - (12 March) 2006 EY 2006-05-04 0.048691 31 25.16 21 - past obs. - (29 March) 2006 EW 2006-04-09 0.029542 66 23.54 17 - past obs. - (29 March) 2006 EE 2006-04-27 0.060515 70 23.41 8 - past obs. - (12 March) 2006 DT63 2006-04-29 0.267903 120 22.25 24 - past obs. - (29 March) 2006 DD42 2006-04-05 0.127327 56 23.92 29 - past obs. - (29 March) 2006 DN 2006-04-15 0.004389 43 24.48 32 - past obs. - (29 March) 2006 DM 2006-04-12 0.078535 51 24.09 31 - past obs. - (29 Feb.) 2006 CL9 2006-05-26 0.039810 97 22.72 47 - past obs. - (29 March) 2006 CW 2006-06-01 0.153258 110 22.45 45 - past obs. - (29 March) 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.) 2003 SN214 2006-05-09 0.074328 87 22.94 34 - >3 April - (11 Feb.) 2003 FK1 2006-04-14 0.013874 112 22.41 8 - faint recov. poss. - (22 Jan.) 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 - >4 April - (11 Feb.) 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
2006 FH734
2006 FH36428, 474, E12
2006 FUJ95
2006 FV448, 734
2006 FW291
2006 FW33291, G96
CodeObservatoryObjects Observed
291Spacewatch 1.8m telescope 2006 FW, 2006 FW33
428Reedy Creek Obs. 2006 FH36
448Desert Moon Obs. 2006 FV
474Mt. John Obs. 2006 FH36
734Farpoint Obs. 2006 FH, 2006 FV
E12Siding Spring Survey (SSS) 2006 FH36
G96Mt. Lemmon Survey (MLS) 2006 FW33
J95Great Shefford Obs. 2006 FU
[ object listings | index | 48 Hours | viewing | top ]

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