3-9 July '06 - A/CC Small Object Report

ACC's Small Object Report for 3-9 July 2006

A semi-automated report compiled on 9 July 2006 at 2359 UTC

Two* small asteroids were reported in the last 168 hours, during which none were newly discovered.

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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.

Object Listings -- smallest objects first [ Alpha Index | 48 Hours | top ]

Size estimate: 29 meters per JPL H=25.31, MPC H=25.4 JPL classifies 2006 MB14 as an Apollo and calculates an Earth MOID of 0.004579 AU (1.78 LD), and reports this object passed Earth at 1.7 lunar distances (LD) on 28 June 2006 at 0725 UT. Observations are reported from the following observatories in MPECs 2006-N05, 2006-N09, and 2006-N18: Wildberg Obs. [198] 2006-07-02 2306-2322, 5 pos. in MPEC 2006-N05, follow-up 2006-07-03 2234-2247, 4 pos. in MPEC 2006-N09, follow-up Table Mountain Obs. [673{5}] coded to Jim Young 2006-07-03 0442-0503, 4 pos. in MPEC 2006-N05, follow-up Great Shefford Obs. [J95] 2006-07-07 2306-2343, 3 pos. in MPEC 2006-N18, follow-up See also information from the week ending 2 July 2006. 2006 MB (K06M00B) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]

Size estimate: 104 meters per JPL H=22.56, MPC H=22.5 JPL classifies 2006 MB as an Amor and calculates an Earth MOID of 0.062462 AU (24.30 LD), and reports this object passed Earth at 27.2 LD on 4 June 2006. Observations are reported from the following observatories in MPEC 2006-N18: Great Shefford Obs. [J95] 2006-07-07 2204-2234, 2 pos. in MPEC 2006-N18, follow-up See also information from the week ending 2 July 2006. 2004 XP14 (K04X14P) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]

Size estimate: 467 meters per JPL H=19.30, MPC H=19.9 -- not small This object was listed from 11 Dec. 2004 until 17 March 2005 as an impact risk. JPL classifies 2004 XP14 as an Apollo and calculates an Earth MOID of 0.001799 AU (0.70 LD), and reports this object passed Earth at 1.1 LD on 3 July 2006 at 0426 UT. Observations are reported from the following observatories in MPECs 2006-N05, 2006-N09, 2006-N18, and 2006-N19: CEAMIG-REA [I77] 2006-07-02 0809-0841, 11 pos. in MPEC 2006-N05, follow-up Siding Spring Survey (SSS) [E12] 2006-07-02 1949-2015, 23 pos. in MPEC 2006-N05, follow-up Table Mountain Obs. [673{5}] coded to Jim Young 2006-07-03 0814-0844, 6 pos. in MPEC 2006-N09, follow-up 2006-07-03 1009-1034, 6 pos. in MPEC 2006-N09, follow-up 2006-07-05 0430-0520, 6 pos. in MPEC 2006-N09, follow-up New Mexico Skies [H06{2}] coded to Robert Hutsebaut via Rent-A-Scope 2006-07-03 0840-0841, 5 pos. in MPEC 2006-N09, follow-up Hamamatsu-Yuto Obs. [379] 2006-07-03 1548-1553, 6 pos. in MPEC 2006-N09, follow-up Lulin Sky Survey (LUSS) [D35] 2006-07-03 1709-1721, 17 pos. in MPEC 2006-N09, follow-up 2006-07-04 1534-1552, 4 pos. in MPEC 2006-N09, follow-up Campo Catino Automated Telescope [A38] 2006-07-03 2056-2115, 109 pos. in MPEC 2006-N09, follow-up Eschenberg Obs. [151] 2006-07-03 2102-2103, 2 pos. in MPEC 2006-N09, follow-up Wildberg Obs. [198] 2006-07-03 2126-2138, 7 pos. in MPEC 2006-N09, follow-up 2006-07-04 2143-2157, 5 pos. in MPEC 2006-N09, follow-up Waterlooville Obs. [940] 2006-07-03 2129-2137, 2 pos. in MPEC 2006-N09, follow-up Balzaretto Obs. [A81] 2006-07-03 2129-2138, 5 pos. in MPEC 2006-N09, follow-up Village-Neuf Obs. [138] 2006-07-03 2131-2142, 11 pos. in MPEC 2006-N09, follow-up Naef Obs. [A13] 2006-07-03 2131-2216, 16 pos. in MPEC 2006-N09, follow-up 2006-07-04 2203-2208, 3 pos. in MPEC 2006-N09, follow-up Radebeul Obs. [A72] 2006-07-03 2136-2138, 4 pos. in MPEC 2006-N09, follow-up Stammersdorf Obs. [A97] 2006-07-03 2202-2242, 50 pos. in MPEC 2006-N09, follow-up Montcabre Obs. [213] 2006-07-03 2237-2238, 5 pos. in MPEC 2006-N09, follow-up Taunus Obs. [B01] 2006-07-03 2342-2357, 27 pos. in MPEC 2006-N09, follow-up North Obs. [J69] 2006-07-03 2344-2357, 9 pos. in MPEC 2006-N09, follow-up Modra Obs. [118] 2006-07-04 0048-0051, 5 pos. in MPEC 2006-N09, follow-up Klet Obs. [046] 2006-07-04 2304-2315, 5 pos. in MPEC 2006-N09, follow-up Golden Hill Obs. [J77] 2006-07-04 2306-0022, 16 pos. in MPECs 2006-N19 -N18, follow-up Tweenhills Obs. [J68] 2006-07-04 2338-0019, 6 pos. in MPEC 2006-N09, follow-up

48+120 Hours [ Objects Listings (size order) | Object Index (alpha/xref) | top ]

Observations of two small objects were reported during the last 168 hours: 2006 MB & 2006 MB14, plus 2004 XP14 in MPECs: 2006-N05 time-stamped 2006 July 3, 06:17 UT - Daily Orbit Update 2006-N09 time-stamped 2006 July 7, 06:16 UT - Daily Orbit Update 2006-N18 time-stamped 2006 July 8, 06:17 UT - Daily Orbit Update 2006-N19 time-stamped 2006 July 9, 06:17 UT - Daily Orbit Update Date & times for other sources that were parsed to compile this page: JPL Close Approaches, downloaded at 2006 July 8, 1933 UTC JPL NEO Orbital Elements, downloaded at 2006 July 8, 1937 UTC Lowell Observatory Orbit intersections, time-stamped 2006 Jul 09 1357:28 UTC MPC NEA.DAT from MPC mirror, downloaded at 2006 July 8, 1930 UTC Risk monitoring sites, as of A/CC's check at 2006 July 9, 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 11 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 MB14 2006-07-10 0.004579 29 25.31 8 - (8 July) 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 MY1 2006-07-24 0.147149 116 22.33 7 - past obs. - (27 June) 2006 KJ89 2006-07-28 0.093094 58 23.85 7 - past obs. - (1 July) 2006 MB 2006-07-31 0.062462 104 22.56 20 - (8 July) 2006 KM89 2006-08-01 0.146410 62 23.67 22 - past obs. - (21 June) 2006 MH10 2006-08-24 0.125218 117 22.30 5 - past obs. - (27 June) 2006 KK103 2006-08-28 0.146319 107 22.51 32 - past obs. - (4 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 MB14 2006-07-10 0.004579 29 25.31 8 - (8 July) 2006 MH10 2006-08-24 0.125218 117 22.30 5 - past obs. - (27 June) 2006 MY1 2006-07-24 0.147149 116 22.33 7 - past obs. - (27 June) 2006 MB 2006-07-31 0.062462 104 22.56 20 - (8 July) 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 32 - past obs. - (4 June) 2006 KM89 2006-08-01 0.146410 62 23.67 22 - past obs. - (21 June) 2006 KJ89 2006-07-28 0.093094 58 23.85 7 - past obs. - (1 July) 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

2004 XP14

046, 118, 138, 151, 198, 213, 379, 673, 940, A13, A38, A72, A81, A97, B01, D35, E12, H06, I77, J68, J69, J77

2006 MB

J95

2006 MB14

198, 673, J95

Code

Observatory

Objects Observed