Contents  on 12 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 12 January '08

The MPC's NEO Confirmation Page has 13 listings: 6 new, 7 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had six new and seven updated listings. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 30 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 12 January '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been seven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-A58 - "22:30 UT" - 2008 AU26


MPEC 2008-A57 - "20:32 UT" - 2008 AW28


MPEC 2008-A56 - "20:29 UT" - 2008 AV28


MPEC 2008-A55 - "20:27 UT" - 2008 AU28


MPEC 2008-A54 - "20:24 UT" - 2008 AT28


MPEC 2008-A53 - "20:21 UT" - 2008 AS28


<< DOU on 12 Jan. '08 >>  MPEC 2008-A52 - "07:08 UT" - Daily Orbit Update

Observers  on 12 January '08

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 3 in MPECs 2008-A54, 2008-A55 & 2008-A56 -- 2008 AV28, 2008 AU28, 2008 AT28
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2008-A52 -- 2003 XL, 2003 AD1, 65706, 40267, 144922, 137427, 7889, 3691, 1862
151Eschenberg Obs. in Switzerland, 1 in MPEC 2008-A52 -- 2005 WJ56
734Farpoint Obs. in Kansas, 2 in MPECs 2008-A53 & 2008-A54 -- 2008 AT28, 2008 AS28
651Grasslands Obs. in Arizona, 1 in MPEC 2008-A55 -- 2008 AU28
J37Huelva Obs. in Spain, 1 in MPEC 2008-A52 -- 2005 WJ56
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-A58 -- 2008 AU26
185Jurassien-Vicques Obs. in Switzerland, 1 in MPEC 2008-A52 -- 90403
246KLENOT in the Czech Republic, 3 in MPECs 2008-A52 & 2008-A55 -- 2008 AU28, 2008 AD, 2007 YQ56
704LINEAR in New Mexico, 8 in MPEC 2008-A52 -- 2007 PU11, 65706, 40267, 154589, 136793, 5587, 3691, 1862
699LONEOS in Arizona, 1 in MPEC 2008-A52 -- 170903
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2008-A52 & 2008-A55 -- 2008 AU28, 2007 VK184
J40Malaga Obs. in Spain, 1 in MPEC 2008-A52 -- 2005 WJ56
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2008-A52, 2008-A53, 2008-A54, 2008-A55, 2008-A56, 2008-A57 & 2008-A58 -- 2008 AW28, 2008 AV28, 2008 AU28, 2008 AU26, 2008 AT28, 2008 AS28, 2006 KT1, 2005 XK8, 2005 CZ36, 85953, 8034
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2008-A52 -- 2007 YZ, 2007 YF1, 2007 WF55, 2007 VH3, 2007 SP6, 2005 XD1, 2005 TU45, 90403, 68359, 138947, 136793, 5131
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2008-A52, 2008-A54, 2008-A56 & 2008-A58 -- 2008 AV28, 2008 AU26, 2008 AT28, 2006 KT1, 144411
291Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2008-A52, 2008-A53, 2008-A54, 2008-A56, 2008-A57 & 2008-A58 -- 2008 AW28, 2008 AV28, 2008 AU26, 2008 AT28, 2008 AS28, 2007 YS56, 2007 YQ56, 2007 YO56, 2007 YM56, 2007 XJ16, 2007 TA19, 1998 BB10, 137078

Impact Risk Monitoring  on 12 January '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 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 AS28JPL Sentry23212013-2107646.9e-08-3.88-4.280JPL: "Analysis based on 22 observations spanning 2.0592 days (2008-Jan-10.135 to 2008-Jan-12.19416)." Diameter approximately 0.441 km. from mean, weighted H=19.4.
2008 AF4JPL Sentry20512084-2099542.4e-05-2.19-2.411JPL: "Analysis based on 42 observations spanning 1.1138 days (2008-Jan-10.39652 to 2008-Jan-11.51032)." Diameter approximately 0.431 km. from mean, weighted H=19.5.
NEODyS17022078-2090271.69e-05-2.33-2.421NEODyS: "Based on 43 optical observations (of which 1 are rejected as outliers) from 2008/01/10.397 to 2008/01/11.511."
2007 YS56JPL Sentry1544210417.1e-08-7.91-7.910JPL: "Analysis based on 49 observations spanning 11.051 days (2007-Dec-31.24562 to 2008-Jan-11.29675)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
2007 YQ56JPL Sentry15442094-210021.7e-09-6.50-6.680JPL: "Analysis based on 66 observations spanning 12.049 days (2007-Dec-31.14551 to 2008-Jan-12.19435)." Diameter approximately 0.340 km. from mean, weighted H=20.0.
NEODyS1544R E M O V E D
2007 VK184NEODyS15442048-207163.43e-04-1.82-1.831NEODyS: "Based on 102 optical observations (of which 1 are rejected as outliers) from 2007/11/12.140 to 2008/01/11.153. NOTE: The Virtual Impactor in 2048/06/03.088 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 12 January '08

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

2321Noted that JPL Sentry has posted 2008 AS28 as an impact risk - see above
2239Grabbed MPEC 2008-A58 - 2008 AU26 - see above
2051Noted that JPL Sentry has posted 2008 AF4 as an impact risk - see above
Grabbed MPEC 2008-A53 - 2008 AS28 - see above
Grabbed MPEC 2008-A54 - 2008 AT28 - see above
Grabbed MPEC 2008-A55 - 2008 AU28 - see above
Grabbed MPEC 2008-A56 - 2008 AV28 - see above
Grabbed MPEC 2008-A57 - 2008 AW28 - see above
1702Noted that NEODyS has posted 2008 AF4 as an impact risk - see above
1544Noted that NEODyS has updated its 2007 VK184 risk assessment - see above
Noted that JPL Sentry has updated its 2007 YQ56 risk assessment - see above
Noted that NEODyS has removed 2007 YQ56 as an impact risk - see above
Noted that JPL Sentry has updated its 2007 YS56 risk assessment - see above
Grabbed MPEC 2008-A52 - Daily Orbit Update - see above