Contents  on 11 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 11 January '08

The MPC's NEO Confirmation Page has 18 listings: 8 new, 10 updated

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had eight new and ten updated listings. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 29 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 11 January '08

Minor Planet Electronic Circulars

As of last check at 2356 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-A51 - "21:26 UT" - Comets C/2007 U3, 2007 U4, 2007 U5, 2007 U6 (SOHO)


MPEC 2008-A50 - "21:20 UT" - Comets C/2007 T10, 2007 T11, 2007 T12, 2007 T13, 2007 T14 (SOHO)


MPEC 2008-A49 - "18:24 UT" - Comet C/2007 T1 (McNaught)


MPEC 2008-A48 - "16:57 UT" - Comet C/2008 A1 (McNaught)


MPEC 2008-A47 - "16:49 UT" - 2008 AH4


MPEC 2008-A46 - "16:40 UT" - 2008 AG4


MPEC 2008-A45 - "16:29 UT" - 2008 AF4


MPEC 2008-A44 - "16:23 UT" - 2008 AE4


<< DOU on 11 Jan. '08 >>  MPEC 2008-A43 - "07:08 UT" - Daily Orbit Update


MPEC 2008-A42 - "00:26 UT" - 2007 RT15

Observers  on 11 January '08

A total of 26 observing facilities appear in today's MPECs.

CodeObserver / observatory
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2008-A43 -- 2005 WJ56
937Bradbury Obs., 1 in MPEC 2008-A43 -- 4954
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2008-A43 & 2008-A45 -- 2008 AF4, 2007 YK, 2007 YF1, 2003 YQ94, 22099, 170502, 162038, 3288
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2008-A43 -- 2008 AF3
151Eschenberg Obs. in Switzerland, 1 in MPEC 2008-A43 -- 2005 WJ56
734Farpoint Obs. in Kansas, 4 in MPECs 2008-A44, 2008-A45, 2008-A46 & 2008-A47 -- 2008 AH4, 2008 AG4, 2008 AF4, 2008 AE4
355Hadano Obs. in Japan, 3 in MPEC 2008-A43 -- 2007 YZ, 2007 VQ4, 2005 WJ56
B15Inastars Obs. in Germany, 1 in MPEC 2008-A43 -- 1862
715Jornada Obs. in New Mexico, 1 in MPEC 2008-A43 -- 2008 AD
704LINEAR in New Mexico, 8 in MPECs 2008-A43, 2008-A44 & 2008-A45 -- 2008 AF4, 2008 AE4, 2007 YV56, 2005 XD1, 172722, 170502, 1864, 1036
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2008-A48 -- C/2008 A1
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2008-A43 -- 2005 WJ56
213Montcabre Obs. in Spain, 1 in MPEC 2008-A43 -- 2005 WJ56
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2008-A43, 2008-A45, 2008-A46 & 2008-A47 -- 2008 AH4, 2008 AG4, 2008 AF4, 2005 XK8, 22099, 8034, 4450
675Mt. Palomar in southern California, 1 in MPEC 2008-A42 -- 2007 RT15
A13Naef Obs. in Switzerland, 3 in MPEC 2008-A43 -- 172722, 137052, 136793
J47Nazaret Obs. in Spain, 1 in MPEC 2008-A43 -- 2005 WJ56
423North Ryde Obs. in New South Wales, 2 in MPECs 2008-A48 & 2008-A49 -- C/2008 A1, C/2007 T1
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2008-A43 -- 2005 WJ56
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-A48 -- C/2008 A1
H066Andrew Lowe in Alberta via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-A43 -- 2005 WJ56
461SZTE Asteroid Program (SZTE) in Hungary, 2 in MPECs 2008-A43 & 2008-A45 -- 2008 AF4, 2007 YV56
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-A48 -- C/2008 A1
2492LASCO Coronagraph 2 (SOHO C2) via the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 9 in MPECs 2008-A50 & 2008-A51 -- C/2007 U6, C/2007 U5, C/2007 U4, C/2007 U3, C/2007 T14, C/2007 T13, C/2007 T12, C/2007 T11, C/2007 T10
2493LASCO Coronagraph 3 (SOHO C3) via the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 4 in MPECs 2008-A50 & 2008-A51 -- C/2007 U5, C/2007 U3, C/2007 T14, C/2007 T10
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-A43 -- 1999 RQ28
291Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2008-A43, 2008-A44 & 2008-A46 -- 2008 AG4, 2008 AE4, 2007 YU56, 2007 YQ56, 2007 YO56, 2007 YM56, 2007 XY9, 2007 US, 2006 CG, 2003 EE16, 2001 TW1, 2001 MA8, 1998 FX134
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-A48 -- C/2008 A1

Impact Risk Monitoring  on 11 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 AE4JPL Sentry1956207413.6e-09-7.88-7.880JPL: "Analysis based on 10 observations spanning 1.1184 days (2008-Jan-10.20616 to 2008-Jan-11.32459)." Diameter approximately 0.062 km. from mean, weighted H=23.7.
2007 YQ56JPL Sentry15332027-2106117.8e-08-4.78-5.290JPL: "Analysis based on 54 observations spanning 10.022 days (2007-Dec-31.14551 to 2008-Jan-10.16705)." Diameter approximately 0.350 km. from mean, weighted H=20.0.
NEODyS15332052-2089164.42e-08-4.96-5.380NEODyS: "Based on 54 optical observations (of which 0 are rejected as outliers) from 2007/12/31.146 to 2008/01/10.168."
2007 VK184JPL Sentry23562048-205743.4e-04-1.82-1.831JPL: "Analysis based on 101 observations spanning 60.013 days (2007-Nov-12.13904 to 2008-Jan-11.15189)." Diameter approximately 0.130 km. from mean, weighted H=22.0.
2007 USNEODyS1601R E M O V E D
JPL Sentry1533R E M O V E DJPL: Risk listing removed at 1152 UTC.

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 11 January '08

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

2356Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above
2204Grabbed MPEC 2008-A50 - Comets C/2007 T10, 2007 T11, 2007 T12, 2007 T13, 2007 T14 (SOHO) - see above
Grabbed MPEC 2008-A51 - Comets C/2007 U3, 2007 U4, 2007 U5, 2007 U6 (SOHO) - see above
1956Noted that JPL Sentry has posted 2008 AE4 as an impact risk - see above
1857Grabbed MPEC 2008-A49 - Comet C/2007 T1 (McNaught) - see above
1809Grabbed MPEC 2008-A48 - Comet C/2008 A1 (McNaught) - see above
1706Grabbed MPEC 2008-A46 - 2008 AG4 - see above
Grabbed MPEC 2008-A47 - 2008 AH4 - see above
1641Grabbed MPEC 2008-A44 - 2008 AE4 - see above
Grabbed MPEC 2008-A45 - 2008 AF4 - see above
1601Noted that NEODyS has removed 2007 US as an impact risk - see above
1533Noted that JPL Sentry has removed 2007 US as an impact risk - see above
Noted that JPL Sentry has updated its 2007 YQ56 risk assessment - see above
Noted that NEODyS has updated its 2007 YQ56 risk assessment - see above
Grabbed MPEC 2008-A43 - Daily Orbit Update - see above
0106Grabbed MPEC 2008-A42 - 2007 RT15 - see above