Contents on 20 February '08
- IAU Minor Planet Center
- Impact Risk Monitoring -- two objects
- Consolidated Risk Tables - the CRT page
- Earth's Busy Neighborhood Traffic Report
- Ephemerides for risk-rated and nearby objects
- 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 February '08
The MPC's NEO Confirmation Page has 2 listings: 2 updated
When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Of these, one was a "one nighter."
To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.
New MPECs on 20 February '08
Minor Planet Electronic Circulars
As of last check at 2354 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observations of risk-listed objects
- K08C71C 2008 CC71 (small asteroid, arc=10 days, H=24.8 ~37m) from the Catalina Sky Survey (CSS) (Feb. 19.49p3)
- Observations of small asteroids (H>22.0)
- K07P02F 2007 PF2 (arc=4 days, H=24.5 ~43m) from the Siding Spring Survey (SSS) (2007 Aug. 11.37p3)
- K07D00A 2007 DA (arc=2 opp, H=22.4 ~112m) from Siegen Obs. (Feb. 17.91p2)
- Observations of other objects
- K08CB6R 2008 CR116 (arc=8 days, H=20.3 ~295m) from Petit Jean Mtn. South Obs. (PJMSO) (Feb. 19.39-40p8)
- K08C01N 2008 CN1 (arc=17 days, H=20.5 ~269m) from PJMSO (Feb. 19.38-39p10)
- K08C01L 2008 CL1 (arc=17 days, H=19.2 ~490m) from PJMSO (Feb. 19.47-48p7)
- K08C00H 2008 CH (arc=18 days, H=20.4 ~282m) from CSS (Feb. 19.32-34p4)
- K08A00E 2008 AE (arc=2 opp, H=19.7 ~389m) from PJMSO (Feb. 19.40-41p6)
- K07T24U 2007 TU24 (arc=131 days, H=20.6 ~257m) from PJMSO (Feb. 19.41-43p5)
- K07T08G 2007 TG8 (Q=4.305 AU, arc=159 days, H=18.6 ~645m) from PJMSO (Feb. 19.43p5)
- K05E70K 2005 EK70 (arc=4 opp, H=17.4 ~1.12 km) from Hamamatsu-Yuto Obs. (Feb. 19.45-49p8)
- F3591 153591 2001 SN263 from Siegen Obs. (Feb. 15.94p3 & 17.01p3)
- D7158 137158 1999 FB from CSS (Feb. 19.41-43p3)
- 16657 16657 1993 UB from CSS (Feb. 19.27-28p4)
- 11398 11398 1998 YP11 from PJMSO (Feb. 19.44p5)
- 04450 4450 Pan (1987 SY) from Siegen Obs. (Feb. 15.92p3 & 17.89p3)
- 01685 1685 Toro (1948 OA) from Siegen Obs. (Feb. 15.90p3 & 17.88p2)
- 01036 1036 Ganymed (1924 TD) from Laietania Obs. (Feb. 5.91p1 & 5.99p1) and Siegen Obs. (Feb. 15.91p3)
Observers on 20 February '08
Six observing facilities appear in today's MPEC.
|Code||Observer / observatory|
|703||Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2008-D17 -- 2008 CH, 2008 CC71, 16657, 137158|
|379||Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2008-D17 -- 2005 EK70|
|B57||Laietania Obs. in Spain, 1 in MPEC 2008-D17 -- 1036|
|H45||Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2008-D17 -- 2008 CR116, 2008 CN1, 2008 CL1, 2008 AE, 2007 TU24, 2007 TG8, 11398|
|E12||Siding Spring Survey in New South Wales, 1 in MPEC 2008-D17 -- 2007 PF2|
|510||Siegen Obs. in Germany, 5 in MPEC 2008-D17 -- 2007 DA, 153591, 4450, 1685, 1036|
Impact Risk Monitoring on 20 February '08
Notes for Today's Latest Risk Assessments
|2008 DB||NEODyS||1836||2046-2090||29||2.89e-05||-4.92||-4.98||0||NEODyS: "Based on 35 optical observations (of which 2 are rejected as outliers) from 2008/02/18.243 to 2008/02/19.410."|
|2008 CC71||NEODyS||1730||2034-2089||28||1.05e-04||-3.98||-4.13||0||NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2008/02/09.397 to 2008/02/19.487."|
|JPL Sentry||1603||2033-2082||27||1.1e-04||-3.97||-4.13||0||JPL: "Analysis based on 29 observations spanning 10.090 days (2008-Feb-09.39625 to 2008-Feb-19.48606)." Diameter approximately 0.038 km. from mean, weighted H=24.8.|
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 20 February '08
Times are UTC for when items were noted or added by The Tracking News.
|1835||Noted that NEODyS has posted 2008 DB as an impact risk - see above|
|1730||Noted that NEODyS has updated its 2008 CC71 risk assessment - see above|
|1603||Noted that JPL Sentry has updated its 2008 CC71 risk assessment - see above|
Grabbed MPEC 2008-D17 - Daily Orbit Update - see above