Contents on 20 June '11
- IAU Minor Planet Center
- Observers -- eight observers
- Impact Risk Monitoring -- one object
- Consolidated Risk Tables - the CRT page
Of 424 risk-listed objects, 348 have had news in the last 30 days. Updated at 1443 UTC on 20 June.
- Earth's Busy Neighborhood Traffic Report
One object is known to be within ten LD of Earth today. Updated at 1706 UTC on 20 June.
- 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 20 June '11
The MPC's NEO Confirmation Page has 2 listings
When last checked at 2323 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two objects listed. Both of these 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 20 June '11
Minor Planet Electronic Circulars
As of last check at 2323 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2011-M14 time-stamped "01:15 UT" - 2005 XN4 - see below
- MPEC 2011-M15 time-stamped "07:05 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K11L19C 2011 LC19 (Q=5.538 AU, arc=10 days, H=18.1 ~812m) from Astronomical Research Obs. Westfield (June 19.20-21p4), San Marcello Pistoiese Obs. (June 19.93-95p3), Great Shefford Obs. (June 19.98-99p2), and Sandlot Obs. (June 20.23-26p3)
- Observations of recently (no longer) risk-listed objects
- K11L19A 2011 LA19 (Q=4.833 AU, arc=10 days, H=19.1 ~513m) from ARO Westfield (June 19.12-13p5)
- Observations of other objects
- K11L20J 2011 LJ20 (i=41.6°, arc=8 days, H=20.5 ~269m) from ARO Westfield (June 19.19p3)
- K11L01J 2011 LJ1 (Q=4.090 AU, arc=15 days, H=19.3 ~467m) from ARO Westfield (June 19.10-11p3 & 19.17-18p3)
- K11K17P 2011 KP17 (arc=39 days, H=19.2 ~490m) from ARO Westfield (June 19.19-20p5 & 20.11-12p3)
- K11K09N 2011 KN9 (arc=26 days, H=18.8 ~589m) from ARO Westfield (June 19.20-21p3)
- K11H00O 2011 HO (Q=5.278 AU, arc=56 days, H=19.6 ~407m) from ARO Westfield (June 19.22p4)
- K11G62L 2011 GL62 (q=0.334 AU, arc=68 days, H=19.5 ~426m) from ARO Westfield (June 20.13-15p3 at V=21.9-22.3)
- K11G60L 2011 GL60 (arc=71 days, H=21.2 ~195m) from ARO Westfield (June 19.12-14p3 at V=21.9-22.2)
- K10N01J 2010 NJ1 (arc=2 opp, H=20.3 ~295m) from Schiaparelli Obs. (June 18.99-00p2)
- K08L16V 2008 LV16 (arc=2 opp, H=20.2 ~309m) from the Siding Spring Survey (SSS) (June 19.65-70p4)
- K06SD4V 2006 SV134 (arc=3 opp, H=18.8 ~589m) from ARO Westfield (June 19.11-12p3)
- A2873 102873 1999 WK11 from Pan-STARRS 1 (PS1) (June 19.28-29p4)
- 07482 7482 1994 PC1 from Pear Tree Obs. (June 19.08-11p3)
MPEC 2011-M14 - "01:15 UT" - 2005 XN4
- K05X04N 2005 XN4 (i=58.0°, H=19.8 ~371m) from Great Shefford Obs. (June 16.95-98p3 & 19.93-96p3)
Observers on 20 June '11
Eight observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 10 in MPEC 2011-M15 -- 2011 LJ20, 2011 LJ1, 2011 LC19, 2011 LA19, 2011 KP17, 2011 KN9, 2011 HO, 2011 GL62, 2011 GL60, 2006 SV134|
|J95||Great Shefford Obs. in England, 2 in MPECs 2011-M14 & 2011-M15 -- 2011 LC19, 2005 XN4|
|F51||Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-M15 -- 102873|
|H23||Pear Tree Obs. in Florida, 1 in MPEC 2011-M15 -- 7482|
|104||San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-M15 -- 2011 LC19|
|H36||Sandlot Obs. in Kansas, 1 in MPEC 2011-M15 -- 2011 LC19|
|204||Schiaparelli Obs. in Italy, 1 in MPEC 2011-M15 -- 2010 NJ1|
|E12||Siding Spring Survey in New South Wales, 1 in MPEC 2011-M15 -- 2008 LV16|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 20 June '11
Notes for Today's Latest Risk Assessments
|2011 LC19||JPL Sentry||1436||R E M O V E D||JPL: Risk listing removed at 0949 UTC.|
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.