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Earth's Busy Neighborhood

    ACC's Small Object Report for 26 June - 2 July 2006    

A semi-automated report compiled on 2 July 2006 at 2359 UTC

There are five* small asteroids reported in the last 168 hours, during which one was newly discovered.
Currently 1,070 NEAs are listed with H>22.0 by JPL and/or the MPC (891 are listed as such by both).
*This week's report also includes one larger asteroid passing close by.
[ 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 MB14 (K06M14B) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 30 meters per JPL H=25.27, MPC H=25.4 JPL classifies 2006 MB14 as an Apollo and calculates an Earth MOID of 0.004583 AU (1.78 LD). Observations are reported from the following observatories in MPECs 2006-N02 and 2006-N04: LINEAR [704] 2006-06-30 0618-0714, 5 pos. in MPEC 2006-N02, discovery (*) 2006-07-01 0533-0619, 4 pos. in MPEC 2006-N04, follow-up Consell Obs. [176] 2006-06-30 2255-2304, 10 pos. in MPEC 2006-N02, confirmation Farra d'Isonzo Obs. [595] 2006-06-30 2345-0007, 3 pos. in MPEC 2006-N02, confirmation Gnosca Obs. [143] 2006-07-01 0025-0035, 3 pos. in MPEC 2006-N02, confirmation Farpoint Obs. [734] 2006-07-01 0515-0522, 4 pos. in MPEC 2006-N02, confirmation Catalina Sky Survey (CSS) [703] 2006-07-01 0631-0722, 7 pos. in MPEC 2006-N02, confirmation Sabino Canyon Obs. [854] 2006-07-01 0820-0835, 4 pos. in MPEC 2006-N02, confirmation 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 0.093094 AU (36.22 LD). Lowell Observatory reports 2006 KJ89 has an MOID of 0.03505 AU (13.64 LD) with Mars. Observations are reported from the following observatories in MPEC 2006-N01: Nordic Near-Earth-Object Network (NEON) [J50] 2006-06-27 0034-0105, 2 pos. in MPEC 2006-N01, follow-up See also information from the week ending 25 June 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 0.062514 AU (24.32 LD). Observations are reported from the following observatories in MPECs 2006-M46, 2006-N01, and 2006-N04: Andrushivka Obs. [A50] 2006-06-25 2336-2350, 5 pos. in MPEC 2006-M46, follow-up 2006-06-26 2250-2259, 5 pos. in MPEC 2006-N04, follow-up 2006-06-27 2251-2301, 5 pos. in MPEC 2006-N04, follow-up 2006-06-30 2319-2327, 4 pos. in MPEC 2006-N04, follow-up Farpoint Obs. [734] 2006-06-27 0428-0437, 4 pos. in MPEC 2006-M46, follow-up Consell Obs. [176] 2006-06-30 2130-2143, 5 pos. in MPEC 2006-N01, follow-up See also information from the week ending 25 June 2006. 2006 MY1 (K06M01Y) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 116 meters per JPL H=22.33, MPC H=22.3 JPL classifies 2006 MY1 as an Amor and calculates an Earth MOID of 0.147149 AU (57.26 LD). Observations are reported from the following observatories in MPEC 2006-M46: Farpoint Obs. [734] 2006-06-27 0342-0408, 3 pos. in MPEC 2006-M46, follow-up See also information from the week ending 25 June 2006. 2006 MH10 (K06M10H) [ JPL Orbit Viewer | NEODyS object home | news | viewing | index | top ]
Size estimate: 117 meters per JPL H=22.30, MPC H=22.4 JPL classifies 2006 MH10 as an Amor and calculates an Earth MOID of 0.125218 AU (48.72 LD). Observations are reported from the following observatories in MPEC 2006-M46: Farpoint Obs. [734] 2006-06-26 0545-0555, 3 pos. in MPEC 2006-M46, follow-up 2006-06-27 0310-0321, 3 pos. in MPEC 2006-M46, follow-up See also information from the week ending 25 June 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=19.4 -- 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 will pass Earth at 1.1 lunar distances (LD) on 3 July 2006 at 0426 UT. Observations are reported from the following observatories in MPECs 2006-M46 and 2006-M49: Siding Spring Survey (SSS) [E12] 2006-06-26 1951-1954, 2 pos. in MPEC 2006-M46, follow-up 2006-06-27 1952-1955, 2 pos. in MPEC 2006-M49, follow-up 2006-06-28 1958-1959, 2 pos. in MPEC 2006-M49, follow-up CEAMIG-REA [I77] 2006-06-28 0829-0839, 3 pos. in MPEC 2006-M49, follow-up
48+120 Hours [ Objects Listings (size order) | Object Index (alpha/xref) | top ]
Observations of five small objects were reported during the last 168 hours: 2006 KJ89, 2006 MB, 2006 MB14, 2006 MH10 & 2006 MY1, plus larger 2004 XP14 in MPECs: 2006-M46 time-stamped 2006 June 27, 06:17 UT - Daily Orbit Update 2006-M49 time-stamped 2006 June 29, 06:17 UT - Daily Orbit Update 2006-N01 time-stamped 2006 July 1, 06:16 UT - Daily Orbit Update 2006-N02 time-stamped 2006 July 1, 12:08 UT - 2006 MB14 2006-N04 time-stamped 2006 July 2, 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 1, 1511 UTC JPL NEO Orbital Elements, downloaded at 2006 July 2, 1521 UTC Lowell Observatory Orbit intersections, time-stamped 2006 Jul 01 1952:57 UTC MPC NEA.DAT from MPC mirror, downloaded at 2006 July 2, 1511 UTC Risk monitoring sites, as of A/CC's check at 2006 July 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 12 small objects as being currently in view, including 6 not reported in the last 7 days, plus one larger asteroid observed and close by this week. Viewing by date order - see this list also by designation order Object View until MOID AU Dia H Arc Notes (calc date) ---------- ---------- -------- --- ----- --- - ----------------------- 2005 YA37 2006-07-09 0.035665 112 22.40 128 - past obs. - (25 May) 2006 MB14 2006-07-10 0.004583 30 25.27 1 - (2 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 - (27 June) 2006 KJ89 2006-07-28 0.093094 58 23.85 7 - (1 July) 2006 MB 2006-07-31 0.062514 104 22.56 13 - (2 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 - (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) 2004 XP14 2008-11-17 0.001799 467 19.30 2op - was risk listed - NOT small! - (27 June) 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 0.004583 30 25.27 1 - (2 July) 2006 MH10 2006-08-24 0.125218 117 22.30 5 - (27 June) 2006 MY1 2006-07-24 0.147149 116 22.33 7 - (27 June) 2006 MB 2006-07-31 0.062514 104 22.56 13 - (2 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 - (1 July) 2005 YA37 2006-07-09 0.035665 112 22.40 128 - past obs. - (25 May) 2004 XP14 2008-11-17 0.001799 467 19.30 2op - was risk listed - NOT small! - (27 June) 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 ]
ObjectObserved by MPC code
2004 XP14E12, I77
2006 KJ89J50
2006 MB176, 734, A50
2006 MB14143, 176, 595, 703, 704, 734, 854
2006 MH10734
2006 MY1734
CodeObservatoryObjects Observed
143Gnosca Obs. 2006 MB14
176Consell Obs. 2006 MB, 2006 MB14
595Farra d'Isonzo Obs. 2006 MB14
703Catalina Sky Survey (CSS) 2006 MB14
704LINEAR 2006 MB14
734Farpoint Obs. 2006 MB, 2006 MB14, 2006 MH10, 2006 MY1
854Sabino Canyon Obs. 2006 MB14
A50Andrushivka Obs. 2006 MB
E12Siding Spring Survey (SSS) 2004 XP14
I77CEAMIG-REA 2004 XP14
J50Nordic Near-Earth-Object Network (NEON) 2006 KJ89
[ object listings | index | 48 Hours | viewing | top ]

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