Contents on 21 July '10
- IAU Minor Planet Center
- Observers -- nine observing facilities
- Impact Risk Monitoring -- two objects
Note: A/CC news pages will update infrequently for much of the remainder of July.
- Consolidated Risk Tables - the CRT page
Of 327 risk-listed objects, 22 have had news in the last month. Updated at 1305 UTC.
- Earth's Busy Neighborhood Traffic Report
No objects are known to be within ten LD of Earth today. Updated at 0137 UTC.
- Ephemerides for risk-rated and nearby objects
- News image catalog
- Old & new CRT Archive
- Old News Archive & Small Objects Archive
Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.
NEOCP Activity on 21 July '10
The MPC's NEO Confirmation Page has 19 listings: 13 new, 6 updated
When last checked at 2128 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had thirteen new and six updated listings. Of these, seven were "one nighters."
To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.
New MPECs on 21 July '10
Minor Planet Electronic Circulars
As of last check at 2128 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2010-O16 time-stamped "04:05 UT" - 2003 WX87 - see below
- MPEC 2010-O17 time-stamped "06:13 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K10O00C 2010 OC (Q=4.662 AU, arc=1 day, H=18.8 ~589m) from Doc Greiner Research Obs. (DGRO) (July 20.33-34p3) and the Siding Spring Survey (SSS) (July 20.75-79p4)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K10O00B 2010 OB (Q=4.343 AU, arc=2 days, H=21.9 ~141m) from DGRO (July 20.36-37p5)
- Observations of other objects
- K10O00A 2010 OA (arc=3 days, H=20.4 ~282m) from SSS (July 20.83p2)
- K10L15E 2010 LE15 (arc=2 opp, H=19.4 ~446m) from DGRO (July 20.35-36p6)
- K10A00E 2010 AE (arc=197 days, H=19.4 ~446m) from Naef Obs. (July 20.92-96p3)
- K09W26C 2009 WC26 (arc=2 opp, H=17.4 ~1.12 km) from LINEAR (July 20.33-37p4)
- K09A00V 2009 AV (i=45.9°, arc=2 opp, H=17.9 ~891m) from LINEAR (July 20.40-43p4)
- K06K21L 2006 KL21 (arc=2 opp, H=20.9 ~224m) from DGRO (July 20.34p6)
- K02O04S 2002 OS4 (arc=3 opp, H=18.2 ~776m) from Crni Vrh Obs. (July 20.00-04p4)
- K02A09C 2002 AC9 (arc=2 opp, H=20.9 ~224m) from NEAT's Mt. Palomar telescope (2002 Feb. 4.41-45p3)
- G8378 168378 1997 ET30 from La Sagra Obs. (July 20.11-14p3)
- D8404 138404 2000 HA24 from La Sagra Obs. (July 19.13-16p3)
- 23187 23187 2000 PN9 from LINEAR (July 20.34-37p4)
- 04055 4055 Magellan (1985 DO2) from Siegen Obs. (June 24.97-98p3, July 15.89-91p4 & 19.91-94p5)
MPEC 2010-O16 - "04:05 UT" - 2003 WX87
Observers on 21 July '10
Nine observing facilities appear in today's MPECs.
|Code||Observer / observatory|
|106||Crni Vrh Obs. in Slovenia, 1 in MPEC 2010-O17 -- 2002 OS4|
|H26||Doc Greiner Research Obs. (DGRO) in Wisconsin, 4 in MPEC 2010-O17 -- 2010 OC, 2010 OB, 2010 LE15, 2006 KL21|
|704||LINEAR in New Mexico, 3 in MPEC 2010-O17 -- 2009 WC26, 2009 AV, 23187|
|J75||La Sagra Obs. in Spain, 2 in MPEC 2010-O17 -- 168378, 138404|
|5683||Christian Veillet on Mauna Kea in Hawaii, 1 in MPEC 2010-O16 -- 2003 WX87|
|644||NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2010-O17 -- 2002 AC9|
|A13||Naef Obs. in Switzerland, 1 in MPEC 2010-O17 -- 2010 AE|
|E12||Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2010-O17 -- 2010 OC, 2010 OA|
|510||Siegen Obs. in Germany, 1 in MPEC 2010-O17 -- 4055|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 21 July '10
Notes for Today's Latest Risk Assessments
|2010 OC||JPL Sentry||1303||2077||1||3.8e-09||-5.52||-5.52||0||JPL: "Analysis based on 34 observations spanning 1.4755 days (2010-Jul-19.31361 to 2010-Jul-20.789114)." Diameter approximately 0.600 km. from mean, weighted H=18.8.|
|2010 NY65||NEODyS||1303||2011-2087||27||2.26e-08||-4.38||-4.47||0||NEODyS: "Based on 7 optical observations (of which 0 are rejected as outliers) from 2010/07/14.144 to 2010/07/20.280."|
An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.
Chronology on 21 July '10
Times are UTC for when items were noted or added by The Tracking News.
|1303||Noted that JPL Sentry has updated its 2010 OC risk assessment - see above|
Grabbed MPEC 2010-O17 - Daily Orbit Update - see above
|1302||Noted that NEODyS has posted 2010 NY65 as an impact risk - see above|
Grabbed MPEC 2010-O16 - 2003 WX87 - see above