Contents on 14 September '09
- IAU Minor Planet Center
- Observers -- thirteen observing facilities
- Impact Risk Monitoring -- two objects
- Consolidated Risk Tables - the CRT page
- Earth's Busy Neighborhood Traffic Report
- Ephemerides for risk-rated and nearby objects
- News image catalog - new 13-14 Aug. 2009
- 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 14 September '09
The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and six updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of eleven listings on the NEOCP at some point 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 14 September '09
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2009-R54 time-stamped "06:07 UT" - Daily Orbit Update - see below
- MPEC 2009-R55 time-stamped "10:23 UT" - 2009 RG2 - see below
- MPEC 2009-R56 time-stamped "10:29 UT" - 2009 RH2 - see below
- MPEC 2009-R57 time-stamped "10:31 UT" - 2009 RJ2
MPEC 2009-R57 - "10:31 UT" - 2009 RJ2
- K09R02J 2009 RJ2 was discovered at 0658 UT on 13 Sept. by LINEAR, which observed it at Sept. 13.29-34p3. The discovery was confirmed by Skylive Obs. (Sept. 13.95-97p4), ESA Optical Ground Station (ESA OGS) (Sept. 13.96-97p4), Doc Greiner Research Obs. (DGRO) (Sept. 14.16p3), and Sabino Canyon Obs. (Sept. 14.32p3).
MPEC 2009-R56 - "10:29 UT" - 2009 RH2
- K09R02H 2009 RH2 was discovered at 0543 UT on 13 Sept. by LINEAR, which observed it at Sept. 13.24-27p4. The discovery was confirmed by Saint-Barthelemy Obs. (Sept. 13.88-90p4), ESA OGS (Sept. 13.95-97p4), DGRO (Sept. 14.11-12p3), and Sabino Canyon Obs. (Sept. 14.27-28p2).
MPEC 2009-R55 - "10:23 UT" - 2009 RG2
- K09R02G 2009 RG2 was discovered at 0535 UT on 13 Sept. by LINEAR, which observed it at Sept. 13.23-28p4. The discovery was confirmed by ESA OGS (Sept. 13.95-96p4), Skylive Obs. (Sept. 14.06-08p4), DGRO (Sept. 14.15p3), and Sabino Canyon Obs. (Sept. 14.31-34p8).
- Observations of risk-listed objects
- K09R00R 2009 RR (small asteroid, arc=2 days, H=25.5 ~27m) from Sormano Obs. (Sept. 12.87p2 & 12.91p2)
- K09R00N 2009 RN (Q=4.727 AU, arc=2 days, H=19.9 ~355m) from Rio Cuarto Obs. (Sept. 13.29-30p3)
- Observations of small asteroids (H>22.0)
- K09R01T 2009 RT1 (arc=2 days, H=23.5 ~68m) from Sormano Obs. (Sept. 12.94p1)
- K09R00H 2009 RH (arc=3 days, H=23.9 ~56m) from Rio Cuarto Obs. (Sept. 13.03p2)
- K09Q00C 2009 QC (arc=28 days, H=22.3 ~117m) from Rio Cuarto Obs. (Sept. 13.26-27p3)
- Observations of other objects
- K09R01D 2009 RD1 (arc=3 days, H=20.7 ~245m) from DGRO (Sept. 14.13-14p9)
- K09Q36B 2009 QB36 (Q=4.006 AU, arc=14 days, H=17.6 ~1.02 km) from Sormano Obs. (Sept. 12.83p3)
- K09Q33Y 2009 QY33 (arc=26 days, H=19.6 ~407m) from Rio Cuarto Obs. (Sept. 13.21-22p3) and LINEAR (Sept. 13.23-28p5)
- K09M09C 2009 MC9 (arc=75 days, H=18.1 ~812m) from Atlante Obs. (Sept. 13.93-94p3)
- K05E00F 2005 EF (arc=2 opp, H=20.7 ~245m) from LINEAR (Sept. 13.20-22p3)
- F9402 159402 1999 AP10 from Rio Cuarto Obs. (Sept. 13.18-19p3) and LINEAR (Sept. 13.20-22p3)
- D8883 138883 2000 YL29 from Jaen Obs. (Sept. 13.94-95p3)
- 52750 52750 1998 KK17 from LINEAR (Sept. 13.20-22p3)
- 17511 17511 1992 QN from Purple Mtn. Obs. XuYi Station (XuYi Sta.) (Sept. 13.76-79p4)
- 17274 17274 2000 LC16 from An Carraig Obs. (Sept. 12.93-96p5) and Atlante Obs. (Sept. 13.96-97p3)
- 15745 15745 1991 PM5 from Boambee Obs. (Sept. 11.37-40p3 & 13.41-47p3)
- 01865 1865 Cerberus (1971 UA) from Jaen Obs. (Sept. 13.87-88p3)
Observers on 14 September '09
Thirteen observing facilities appear in today's MPECs.
|Code||Observer / observatory|
|J16||An Carraig Obs. in Northern Ireland, 1 in MPEC 2009-R54 -- 17274|
|J51||Atlante Obs. in the Canary Islands, 2 in MPEC 2009-R54 -- 2009 MC9, 17274|
|432||Boambee Obs. in New South Wales, 1 in MPEC 2009-R54 -- 15745|
|H26||Doc Greiner Research Obs. (DGRO) in Wisconsin, 4 in MPECs 2009-R54, 2009-R55, 2009-R56 & 2009-R57 -- 2009 RJ2, 2009 RH2, 2009 RG2, 2009 RD1|
|J04||ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2009-R55, 2009-R56 & 2009-R57 -- 2009 RJ2, 2009 RH2, 2009 RG2|
|J28||Jaen Obs. in Spain, 2 in MPEC 2009-R54 -- 138883, 1865|
|704||LINEAR in New Mexico, 7 in MPECs 2009-R54, 2009-R55, 2009-R56 & 2009-R57 -- 2009 RJ2, 2009 RH2, 2009 RG2, 2009 QY33, 2005 EF, 52750, 159402|
|D29||Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2009-R54 -- 17511|
|I20||Rio Cuarto Obs. in Argentina, 5 in MPEC 2009-R54 -- 2009 RN, 2009 RH, 2009 QY33, 2009 QC, 159402|
|854||Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-R55, 2009-R56 & 2009-R57 -- 2009 RJ2, 2009 RH2, 2009 RG2|
|B04||Saint-Barthelemy Obs. in Italy, 1 in MPEC 2009-R56 -- 2009 RH2|
|B40||Skylive Obs. in Italy, 2 in MPECs 2009-R55 & 2009-R57 -- 2009 RJ2, 2009 RG2|
|587||Sormano Obs. in Italy, 3 in MPEC 2009-R54 -- 2009 RT1, 2009 RR, 2009 QB36|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 14 September '09
Notes for Today's Latest Risk Assessments
|2009 RR||JPL Sentry||1403||2102-2108||11||2.4e-06||-6.11||-6.84||0||JPL: "Analysis based on 24 observations spanning 1.8608 days (2009-Sep-11.18242 to 2009-Sep-13.04322)." Diameter approximately 0.027 km. from mean, weighted H=25.5.|
|2009 RN||JPL Sentry||1403||2091-2107||3||2.0e-09||-6.50||-6.77||0||JPL: "Analysis based on 39 observations spanning 2.3023 days (2009-Sep-11.00009 to 2009-Sep-13.30238)." Diameter approximately 0.370 km. from mean, weighted H=19.8.|
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 14 September '09
Times are UTC for when items were noted or added by The Tracking News.
|1403||Noted that JPL Sentry has updated its 2009 RN risk assessment - see above|
Noted that JPL Sentry has updated its 2009 RR risk assessment - see above
Grabbed MPEC 2009-R54 - Daily Orbit Update - see above
Grabbed MPEC 2009-R55 - 2009 RG2 - see above
Grabbed MPEC 2009-R56 - 2009 RH2 - see above
Grabbed MPEC 2009-R57 - 2009 RJ2 - see above