Contents  on 15 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 15 January '08

The MPC's NEO Confirmation Page has 12 listings: 3 new, 9 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and nine updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of eighteen 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 15 January '08

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been six MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-A76 - "21:54 UT" - Comets C/2007 V7, 2007 V8, 2007 V9, 2007 V10 (SOHO)


MPEC 2008-A75 - "21:48 UT" - Comets C/2007 V3, 2007 V4, 2007 V5, 2007 V6 (SOHO)


MPEC 2008-A74 - "17:40 UT" - 2008 AF32


<< DOU on 15 Jan. '08 >>  MPEC 2008-A73 - "07:09 UT" - Daily Orbit Update


MPEC 2008-A72 - "03:06 UT" - Comets C/2007 U10, 2007 U11, 2007 U12, 2007 U13 (SOHO)


MPEC 2008-A71 - "02:56 UT" - Comets C/2007 S11, 2007 U7, 2007 U8, 2007 U9 (SOHO)

Observers  on 15 January '08

Ten observing facilities appear in today's MPECs.

CodeObserver / observatory
4131Rob McNaught via Australian Natl. Univ. 1m telescope in New South Wales, 2 in MPEC 2008-A73 -- 2008 AX1, 2007 JZ20
703Catalina Sky Survey in Arizona, 1 in MPEC 2008-A74 -- 2008 AF32
639Dresden Obs. in Germany, 1 in MPEC 2008-A73 -- 90403
734Farpoint Obs. in Kansas, 1 in MPEC 2008-A74 -- 2008 AF32
B49Paus Obs. in Spain, 1 in MPEC 2008-A73 -- 2008 AF4
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2008-A73 -- 2008 AF4, 2007 WF55, 2005 XK8, 2005 XD1, 2005 TU45, 1993 TQ2, 90403, 68359, 68063, 153591, 136793, 5131
461SZTE Asteroid Program (SZTE) in Hungary, 2 in MPEC 2008-A73 -- 2008 AF4, 2008 AF3
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2008-A73 -- 2008 AG1, 2002 XY4, 54686
2492LASCO Coronagraph 2 (SOHO C2) via the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 16 in MPECs 2008-A71, 2008-A72, 2008-A75 & 2008-A76 -- C/2007 V9, C/2007 V8, C/2007 V7, C/2007 V6, C/2007 V5, C/2007 V4, C/2007 V3, C/2007 V10, C/2007 U9, C/2007 U8, C/2007 U7, C/2007 U13, C/2007 U12, C/2007 U11, C/2007 U10, C/2007 S11
2493LASCO Coronagraph 3 (SOHO C3) via the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 7 in MPECs 2008-A71, 2008-A72, 2008-A75 & 2008-A76 -- C/2007 V9, C/2007 V4, C/2007 U9, C/2007 U8, C/2007 U13, C/2007 U12, C/2007 U10
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2008-A73 -- 2008 AS28, 2007 YU56, 2007 YM56, 2007 XY9, 2007 XK11, 2007 XF25, 2007 XC10, 2007 VP243

Impact Risk Monitoring  on 15 January '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS 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.
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 AS28NEODyS16292082-208922.99e-10-6.74-6.940NEODyS: "Based on 31 optical observations (of which 1 are rejected as outliers) from 2008/01/10.136 to 2008/01/15.206."
JPL Sentry16282089-210732.3e-09-5.98-6.060JPL: "Analysis based on 31 observations spanning 5.0699 days (2008-Jan-10.135 to 2008-Jan-15.20486)." Diameter approximately 0.421 km. from mean, weighted H=19.5.
2008 AF4JPL Sentry19352086-2108533.1e-05-2.10-2.241JPL: "Analysis based on 59 observations spanning 4.8063 days (2008-Jan-10.39652 to 2008-Jan-15.20285)." Diameter approximately 0.422 km. from mean, weighted H=19.5.
NEODyS16292086-2090132.29e-05-2.22-2.241NEODyS: "Based on 60 optical observations (of which 1 are rejected as outliers) from 2008/01/10.397 to 2008/01/15.204. NOTE: The Virtual Impactor in 2089/01/09.479 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 15 January '08

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

2206Grabbed MPEC 2008-A75 - Comets C/2007 V3, 2007 V4, 2007 V5, 2007 V6 (SOHO) - see above
Grabbed MPEC 2008-A76 - Comets C/2007 V7, 2007 V8, 2007 V9, 2007 V10 (SOHO) - see above
1935Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
1804Grabbed MPEC 2008-A74 - 2008 AF32 - see above
1629Noted that NEODyS has updated its 2008 AF4 risk assessment - see above
Noted that NEODyS has updated its 2008 AS28 risk assessment - see above
Grabbed MPEC 2008-A73 - Daily Orbit Update - see above
1628Noted that JPL Sentry has updated its 2008 AS28 risk assessment - see above
0335Grabbed MPEC 2008-A71 - Comets C/2007 S11, 2007 U7, 2007 U8, 2007 U9 (SOHO) - see above
Grabbed MPEC 2008-A72 - Comets C/2007 U10, 2007 U11, 2007 U12, 2007 U13 (SOHO) - see above