Contents  on 1 February '08

Resources:

The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

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 1 February '08

The MPC's NEO Confirmation Page has 7 listings: 3 new, 4 updated

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and four updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of sixteen objects listed on the NEOCP at some point today.

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 1 February '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-C03 - "22:45 UT" - 2008 BT18


MPEC 2008-C02 - "19:17 UT" - Comet P/2007 VQ11 (Catalina)


<< DOU on 1 Feb. '08 >>  MPEC 2008-C01 - "07:08 UT" - Daily Orbit Update

Observers  on 1 February '08

Thirteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2008-C01 -- 2007 YH, 162825
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2008-C01 & 2008-C02 -- 2007 YB2, P/2007 VQ11, 2005 TU45, 2005 BT1, 2005 BE2, 2002 AV31, 40267, 38091, 170891, 154347, 144922, 3691
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-C01 -- 3288
J95Great Shefford Obs. in England, 1 in MPEC 2008-C03 -- 2008 BT18
379Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2008-C01 -- 2008 AF4, 2005 TU45, 170891, 154347
704LINEAR in New Mexico, 4 in MPECs 2008-C01 & 2008-C03 -- 2008 BT18, 2008 BE15, 2008 AE, 96189
699LONEOS in Arizona, 1 in MPEC 2008-C02 -- P/2007 VQ11
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2008-C01 & 2008-C03 -- 2008 BT18, 2008 BC15, 2004 HK33, 2003 EE16
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2008-C01 -- 2007 YK
A13Naef Obs. in Switzerland, 2 in MPEC 2008-C01 -- 38091, 144922
291Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2008-C01 -- 2008 BS2, 2008 BE15, 2008 BD15, 2007 YV56, 2007 YO56, 2007 VJ184, 2007 VD184, 2007 QE3, 2005 GP21, 2005 CV25, 2003 QZ29, 2001 SG10, 2000 YH29
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-C02 -- P/2007 VQ11
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-C03 -- 2008 BT18
H53Thompsonville Obs. in Illinois, 1 in MPEC 2008-C01 -- 1685

Impact Risk Monitoring  on 1 February '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2356 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of objects under current observation.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2008 BO16NEODyS15232021-2088461.62e-07-5.11-5.980NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/01/30.382 to 2008/01/31.304."
2008 BN16NEODyS15232028-2090232.45e-07-6.83-7.490NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/01/30.248 to 2008/01/31.346."
2008 BE15JPL Sentry15222075-209833.0e-08-7.18-7.390JPL: "Analysis based on 27 observations spanning 1.0674 days (2008-Jan-30.3833 to 2008-Jan-31.45071)." Diameter approximately 0.044 km. from mean, weighted H=24.5.
NEODyS1523R E M O V E D
2008 BD15NEODyS15232025-2090427.27e-07-3.74-3.970NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2008/01/30.314 to 2008/02/01.195."
JPL Sentry15222025-2107446.7e-07-3.80-4.040JPL: "Analysis based on 18 observations spanning 1.8812 days (2008-Jan-30.31301 to 2008-Feb-01.1942)." Diameter approximately 0.220 km. from mean, weighted H=20.9.
2008 BC15NEODyS1523207212.44e-07-7.22-7.220NEODyS: "Based on 25 optical observations (of which 2 are rejected as outliers) from 2008/01/30.313 to 2008/01/31.272."
JPL Sentry15222072-209421.4e-06-6.55-6.740JPL: "Analysis based on 24 observations spanning .95917 days (2008-Jan-30.31193 to 2008-Jan-31.2711)." Diameter approximately 0.016 km. from mean, weighted H=26.6.
2008 AF4NEODyS15232078-2090134.2e-06-3.08-3.220NEODyS: "Based on 338 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/01/31.730."
JPL Sentry15222088-2105251.7e-05-2.51-3.140JPL: "Analysis based on 334 observations spanning 21.333 days (2008-Jan-10.39652 to 2008-Jan-31.72966)." Diameter approximately 0.379 km. from mean, weighted H=19.8.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

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 1 February '08

Times are UTC for when items were noted or added by The Tracking News.

2327Grabbed MPEC 2008-C03 - 2008 BT18 - see above
2031Grabbed MPEC 2008-C02 - Comet P/2007 VQ11 (Catalina) - see above
1523Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 BC15 risk assessment - see above
Noted that NEODyS has posted 2008 BD15 as an impact risk - see above
Noted that NEODyS has removed 2008 BE15 as an impact risk - see above
Noted that NEODyS has posted 2008 BN16 as an impact risk - see above
Noted that NEODyS has posted 2008 BO16 as an impact risk - see above
1522Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 BC15 risk assessment - see above
Noted that JPL Sentry has updated its 2008 BD15 risk assessment - see above
Noted that JPL Sentry has updated its 2008 BE15 risk assessment - see above
Grabbed MPEC 2008-C01 - Daily Orbit Update - see above