Contents  on 30 November '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 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 30 November '08

The MPC's NEO Confirmation Page has 11 listings: 1 new, 10 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and ten updated listings. Of these, eight were "one nighters."

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 30 November '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-W85 - "15:44 UT" - 2005 XM4


<< DOU on 30 Nov. '08 >>  MPEC 2008-W84 - "07:09 UT" - Daily Orbit Update

Observers  on 30 November '08

Ten observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 19 in MPEC 2008-W84 -- 2008 WQ2, 2008 WQ1, 2008 WP1, 2008 WO2, 2008 WN, 2008 WL, 2008 WK, 2008 WG14, 2008 WF14, 2008 WD, 2008 WC, 2008 VU3, 2008 VK14, 2008 VF, 2008 UN3, 2008 UE7, 2008 MZ, 2008 KZ5, 2004 XK3
448Desert Moon Obs. in New Mexico, 1 in MPEC 2008-W84 -- 2008 UC95
639Dresden Obs. in Germany, 2 in MPEC 2008-W84 -- 2008 UE7, 2005 TZ51
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-W84 -- 2008 TK157
A17Guidestar Obs. in Germany, 2 in MPEC 2008-W84 -- 2008 WL64, 2008 WB59
B19Iluro Obs. in Spain, 3 in MPEC 2008-W84 -- 2008 UE7, 2006 SZ217, 142348
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-W84 -- 2008 WS62
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-W85 -- 2005 XM4
291Spacewatch 1.8m telescope in Arizona, 14 in MPEC 2008-W84 -- 2008 WZ13, 2008 WY13, 2008 WX32, 2008 WW32, 2008 WT62, 2008 WK32, 2008 WF14, 2008 VB1, 2008 UV91, 2008 UU1, 2008 UT99, 2008 UK90, 2008 RM98, 2008 OB9
648Winer Obs. in Arizona, 1 in MPEC 2008-W84 -- 2008 WH60
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 November '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
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 WW32NEODyS1544R E M O V E D-
2008 WZ13NEODyS15452023-2090231.3e-06-2.74-3.180NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2008/11/20.276 to 2008/11/30.200."
JPL Sentry15442023-2108541.4e-06-2.74-3.140JPL: "Analysis based on 40 observations spanning 9.9233 days (2008-Nov-20.27557 to 2008-Nov-30.19891)." Diameter approximately 0.583 km. from mean, weighted H=18.8.
2008 WY13JPL Sentry1544210312.8e-09-6.85-6.850JPL: "Analysis based on 29 observations spanning 9.9001 days (2008-Nov-20.27393 to 2008-Nov-30.17406)." Diameter approximately 0.170 km. from mean, weighted H=21.6.
NEODyS1544R E M O V E D-
2008 WO2NEODyS15452065-208831.43e-06-8.38-8.420NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2008/11/20.219 to 2008/11/22.142."
JPL Sentry15442065-209696.0e-05-6.91-7.220JPL: "Analysis based on 27 observations spanning 1.9233 days (2008-Nov-20.21777 to 2008-Nov-22.14106)." Diameter approximately 0.004 km. from mean, weighted H=29.8.

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 30 November '08

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

1658Grabbed MPEC 2008-W85 - 2005 XM4 - see above
1545Noted that NEODyS has updated its 2008 WO2 risk assessment - see above
Noted that NEODyS has updated its 2008 WZ13 risk assessment - see above
1544Noted that JPL Sentry has updated its 2008 WO2 risk assessment - see above
Noted that NEODyS has removed 2008 WW32 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 WY13 risk assessment - see above
Noted that NEODyS has removed 2008 WY13 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 WZ13 risk assessment - see above
Grabbed MPEC 2008-W84 - Daily Orbit Update - see above
Noted that the NEOCP has become active