Contents on 8 August '11
- IAU Minor Planet Center
- Observers -- eleven observers
- Impact Risk Monitoring -- two objects
- Consolidated Risk Tables - the CRT page
Of 406 risk-listed objects, 9 have had news in the last 31 days. Updated at 2102 UTC on 8 Aug.
- Earth's Busy Neighborhood Traffic Report
No objects are known to be within ten LD of Earth today. Updated at 1911 UTC on 8 Aug.
- 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 8 August '11
The MPC's NEO Confirmation Page has 7 listings
When last checked at 2311 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of eighteen listings on the NEOCP today.
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 8 August '11
Minor Planet Electronic Circulars
As of last check at 2311 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2011-P34 time-stamped "06:05 UT" - Daily Orbit Update - see below
- MPEC 2011-P35 time-stamped "16:33 UT" - 2011 PT1 - see below
- MPEC 2011-P36 time-stamped "18:05 UT" - 2011 PU1
MPEC 2011-P36 - "18:05 UT" - 2011 PU1
- K11P01U 2011 PU1 (risk-listed, Earth MOID=0.4 LD, H=25.2 ~31m) from La Sagra Obs. (Aug. 6.97-99p3), Great Shefford Obs. (Aug. 7.08-09p3), Hidetaka Sato via RAS Obs. Mayhill (Aug. 7.26p2), Sandlot Obs. (Aug. 7.34-35p2), St. Pardon de Conques Obs. (Aug. 8.11-14p3), and Astronomical Research Obs. Westfield (Aug. 8.26-28p4)
MPEC 2011-P35 - "16:33 UT" - 2011 PT1
- K11P01T 2011 PT1 (H=20.1 ~323m) from the Siding Spring Survey (SSS) (Aug. 4.74-79p4, 5.65p2, 5.75p1, 7.57p2 & 7.82p1)
- Observations of risk-listed objects
- K11O26B 2011 OB26 (small asteroid, arc=10 days, H=25.6 ~26m) from Great Shefford Obs. (Aug. 7.09-11p3)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K09Q05O 2009 QO5 (arc=2 opp, H=22.0 ~135m) from SSS (Aug. 7.67-70p2)
- Observations of other objects
- K11P00U 2011 PU (arc=4 days, H=21.2 ~195m) from Frasso Sabino Obs. (Aug. 6.04-06p3)
- K11O17X 2011 OX17 (arc=9 days, H=20.2 ~309m) from SSS (Aug. 7.69p2)
- K11O05Q 2011 OQ5 (arc=11 days, H=19.2 ~490m) from Frasso Sabino Obs. (Aug. 6.02-03p3)
- K02X40P 2002 XP40 (arc=4 opp, H=19.9 ~355m) from Krisztian Sarneczky via Apache Point Obs. (2006 Oct. 2.31-32p3 & 2006 Oct. 12.30p3)
- K01SG9K 2001 SK169 (Q=4.713 AU, arc=3 opp, H=17.1 ~1.29 km) from Sarneczky/Apache Point (2006 Sept. 11.20p3)
- K00CA1P 2000 CP101 (arc=2 opp, H=19.6 ~407m) from Blanquita Obs. (Aug. 7.88-92p3)
- 90075 90075 2002 VU94 from LINEAR (Aug. 7.39-44p3)
- 39572 39572 1993 DQ1 from LINEAR (Aug. 7.39-44p4)
- 16960 16960 1998 QS52 from LINEAR (Aug. 7.33-38p3)
- 04183 4183 Cuno (1959 LM) from LINEAR (Aug. 7.39-44p3)
- 01943 1943 Anteros (1973 EC) from LINEAR (Aug. 7.39-44p4)
Observers on 8 August '11
Eleven observers appear in today's MPECs.
|Code||Observer / observatory|
|7057||Krisztian Sarneczky via Apache Point Obs. in New Mexico, 2 in MPEC 2011-P34 -- 2002 XP40, 2001 SK169|
|H21||Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2011-P36 -- 2011 PU1|
|I99||Blanquita Obs. in Spain, 1 in MPEC 2011-P34 -- 2000 CP101|
|157||Frasso Sabino Obs. in Italy, 2 in MPEC 2011-P34 -- 2011 PU, 2011 OQ5|
|J95||Great Shefford Obs. in England, 2 in MPECs 2011-P34 & 2011-P36 -- 2011 PU1, 2011 OB26|
|704||LINEAR in New Mexico, 5 in MPEC 2011-P34 -- 90075, 39572, 16960, 4183, 1943|
|J75||La Sagra Obs. in Spain, 1 in MPEC 2011-P36 -- 2011 PU1|
|H06|||Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-P36 -- 2011 PU1|
|H36||Sandlot Obs. in Kansas, 1 in MPEC 2011-P36 -- 2011 PU1|
|E12||Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2011-P34 & 2011-P35 -- 2011 PT1, 2011 OX17, 2009 QO5|
|I93||St. Pardon de Conques Obs. in France, 1 in MPEC 2011-P36 -- 2011 PU1|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 8 August '11
Notes for Today's Latest Risk Assessments
|2011 PU1||JPL Sentry||2101||2042-2111||231||2.9e-04||-3.89||-4.63||0||JPL: "Analysis based on 17 observations spanning 1.3103 days (2011-Aug-06.9677 to 2011-Aug-08.277994)." Diameter approximately 0.031 km. from mean, weighted H=25.2.|
|2011 OB26||JPL Sentry||1610||2074-2109||23||4.0e-05||-4.94||-5.41||0||JPL: "Analysis based on 26 observations spanning 9.6359 days (2011-Jul-28.4734 to 2011-Aug-07.109334)." Diameter approximately 0.027 km. from mean, weighted H=25.5.|
|NEODyS||1610||2090-2090||1||9.94e-09||-8.44||-8.44||0||NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2011-07-28.474 to 2011-08-07.110."|
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 8 August '11
Times are UTC for when items were noted or added by The Tracking News.
|2101||Noted that JPL Sentry has posted 2011 PU1 as an impact risk - see above|
|1900||Grabbed MPEC 2011-P36 - 2011 PU1 - see above|
|1708||Grabbed MPEC 2011-P35 - 2011 PT1 - see above|
|1610||Noted that JPL Sentry has updated its 2011 OB26 risk assessment - see above|
Noted that NEODyS has updated its 2011 OB26 risk assessment - see above
Grabbed MPEC 2011-P34 - Daily Orbit Update - see above