Contents  on 19 January '08


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 19 January '08

The MPC's NEO Confirmation Page has 15 listings: 8 new, 7 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had eight new and seven updated listings. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 22 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 19 January '08

Minor Planet Electronic Circulars

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

MPEC 2008-B20 - "21:01 UT" - 2004 XN50

MPEC 2008-B19 - "20:16 UT" - 2004 BG41 = 2008 AA31

MPEC 2008-B18 - "20:00 UT" - Comet P/2008 A2 (LINEAR)

<< DOU on 19 Jan. '08 >>  MPEC 2008-B17 - "07:10 UT" - Daily Orbit Update

Observers  on 19 January '08

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2008-B18 -- P/2008 A2
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2008-B18 -- P/2008 A2
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2008-B17 -- 2008 AA31, 7889, 7092, 5587, 3553
448Desert Moon Obs. in New Mexico, 10 in MPEC 2008-B17 -- 2008 AX1, 2008 AU26, 2008 AF4, 2008 AE, 2008 AA31, 2007 YV56, 2007 YQ56, 2007 TU24, 2003 AK18, 162510
734Farpoint Obs. in Kansas, 1 in MPEC 2008-B18 -- P/2008 A2
F65Faulkes Telescope North in Hawaii, 1 in MPEC 2008-B18 -- P/2008 A2
143Gnosca Obs. in Switzerland, 1 in MPEC 2008-B18 -- P/2008 A2
J95Great Shefford Obs. in England, 1 in MPEC 2008-B18 -- P/2008 A2
H51Greiner Research Obs. in Wisconsin, 2 in MPEC 2008-B17 -- 2008 AF4, 2008 AE
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-B18 -- P/2008 A2
682Kanab Obs. in Utah, 2 in MPECs 2008-B17 & 2008-B18 -- 2008 BE, P/2008 A2
704LINEAR in New Mexico, 6 in MPECs 2008-B17 & 2008-B18 -- 2008 AE, P/2008 A2, 2005 TU45, 2003 BT35, 35107, 172722
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2008-B17 -- 2005 TU45, 1993 TQ2, 99935
A06Mataro Obs. in Spain, 1 in MPEC 2008-B17 -- 68359
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-B20 -- 2004 XN50
118Modra Obs. in Slovakia, 1 in MPEC 2008-B18 -- P/2008 A2
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2008-B17 & 2008-B18 -- 2008 BC, 2008 AU28, 2008 AF4, 2008 AF32, 2008 AE4, P/2008 A2, 2004 QQ, 2004 DG2, 2004 DC, 2004 BH41, 54660, 154589
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-B18 -- P/2008 A2
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-B17 -- 2008 AL33, 9172
291Spacewatch 1.8m telescope in Arizona, 13 in MPEC 2008-B17 -- 2008 AV28, 2008 AT28, 2008 AN33, 2008 AK33, 2008 AG33, 2008 AG1, 2007 YQ56, 2007 YF1, 2007 PV27, 2006 BG55, 2005 FC3, 2004 BL11, 2003 AA3
A78Stia Obs. in Italy, 1 in MPEC 2008-B17 -- 68063
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-B18 -- P/2008 A2
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2008-B17 & 2008-B19 -- 2008 AK33, 2008 AF32, 2004 BG41
G72University Hills Obs. in southern California, 1 in MPEC 2008-B17 -- 2008 AE

Impact Risk Monitoring  on 19 January '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2354 and JPL at 2355 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.





Notes for Today's Latest Risk Assessments
2008 AK33JPL Sentry23552010-2092151.5e-08-4.60-4.850JPL: "Analysis based on 32 observations spanning 3.1023 days (2008-Jan-15.08003 to 2008-Jan-18.1823)." Diameter approximately 0.260 km. from mean, weighted H=20.6.

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 19 January '08

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

2355Noted that JPL Sentry has updated its 2008 AK33 risk assessment - see above
2103Grabbed MPEC 2008-B20 - 2004 XN50 - see above
2031Grabbed MPEC 2008-B18 - Comet P/2008 A2 (LINEAR) - see above
Grabbed MPEC 2008-B19 - 2004 BG41 = 2008 AA31 - see above
2000Grabbed MPEC 2008-B17 - Daily Orbit Update - see above