Contents  on 18 January '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 this year 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 18 January '08

The MPC's NEO Confirmation Page has 9 listings: 1 new, 8 updated

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and eight updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of thirteen 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 18 January '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-B16 - "19:44 UT" - Comet C/2007 VO53 (Spacewatch)


MPEC 2008-B15 - "13:05 UT" - 2008 BE


<< DOU on 18 Jan. '08 >>  MPEC 2008-B14 - "07:09 UT" - Daily Orbit Update

Observers  on 18 January '08

Eight observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 16 in MPECs 2008-B14 & 2008-B16 -- 2008 AZ30, 2008 AT28, 2008 AS28, 2008 AH4, 2008 AF4, 2008 AF32, 2008 AF3, 2008 AE4, 2008 AB31, 2008 AA31, 2007 YH, C/2007 VO53, 2007 TC23, 2007 NS4, 2006 AM4, 2005 EK70
I77CEAMIG-REA in Brazil, 1 in MPEC 2008-B14 -- 2007 TU24
703Catalina Sky Survey in Arizona, 1 in MPEC 2008-B14 -- 172722
A27Eridanus Obs. in Germany, 1 in MPEC 2008-B14 -- 1036
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-B16 -- C/2007 VO53
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2008-B14, 2008-B15 & 2008-B16 -- 2008 BE, 2008 AG4, C/2007 VO53
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2008-B14 & 2008-B16 -- C/2007 VO53, 2004 HK33, 2001 JU2
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2008-B14, 2008-B15 & 2008-B16 -- 2008 BE, 2008 AX1, 2008 AN33, 2008 AL33, 2007 YT56, 2007 YO56, 2007 YM56, C/2007 VO53

Impact Risk Monitoring  on 18 January '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.
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 AN33JPL Sentry15492087-209734.4e-10-6.48-6.900JPL: "Analysis based on 30 observations spanning 1.9788 days (2008-Jan-15.4591 to 2008-Jan-17.4379)." Diameter approximately 0.637 km. from mean, weighted H=18.6.
NEODyS1549R E M O V E D
2008 AL33JPL Sentry1549R E M O V E DJPL: Risk listing removed at 1122 UTC.
NEODyS1549R E M O V E D
2008 AS28JPL Sentry1549210412.4e-10-6.94-6.940JPL: "Analysis based on 33 observations spanning 5.9323 days (2008-Jan-10.135 to 2008-Jan-16.067258)." Diameter approximately 0.440 km. from mean, weighted H=19.4.
NEODyS1549R E M O V E D
2008 AF4JPL Sentry18292089-2108452.2e-05-2.31-2.481JPL: "Analysis based on 87 observations spanning 6.6328 days (2008-Jan-10.39652 to 2008-Jan-17.02932)." Diameter approximately 0.410 km. from mean, weighted H=19.6.
NEODyS15492084-2090111.47e-05-2.45-2.471NEODyS: "Based on 88 optical observations (of which 1 are rejected as outliers) from 2008/01/10.397 to 2008/01/17.030. NOTE: The Virtual Impactor in 2089/01/09.478 in the table above is rated as Torino Scale 1."

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 18 January '08

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

2032Grabbed MPEC 2008-B16 - Comet C/2007 VO53 (Spacewatch) - see above
1829Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
1549Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has removed 2008 AL33 as an impact risk - see above
Noted that NEODyS has removed 2008 AL33 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 AN33 risk assessment - see above
Noted that NEODyS has removed 2008 AN33 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 AS28 risk assessment - see above
Noted that NEODyS has removed 2008 AS28 as an impact risk - see above
Grabbed MPEC 2008-B14 - Daily Orbit Update - see above
Grabbed MPEC 2008-B15 - 2008 BE - see above