Contents  on 27 December '10

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 27 December '10

The MPC's NEO Confirmation Page has 4 listings: 2 new, 2 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and two updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of six listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 27 December '10

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-Y31 - "23:07 UT" - 2010 YH


MPEC 2010-Y30 - "18:28 UT" - Comet P/2010 WK (LINEAR)


MPEC 2010-Y29 - "15:40 UT" - Comet P/2002 VP94 (LINEAR)


<< DOU on 27 Dec. '10 >>  MPEC 2010-Y28 - "07:12 UT" - Daily Orbit Update

Observers  on 27 December '10

Seventeen observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 2 in MPECs 2010-Y29 & 2010-Y30 -- P/2010 WK, P/2002 VP94
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2010-Y31 -- 2010 YH
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-Y31 -- 2010 YH
160Castelmartini Obs. in Italy, 2 in MPECs 2010-Y30 & 2010-Y31 -- 2010 YH, P/2010 WK
703Catalina Sky Survey in Arizona, 1 in MPEC 2010-Y31 -- 2010 YH
448Desert Moon Obs. in New Mexico, 6 in MPEC 2010-Y28 -- 2010 WD9, 2010 VL1, 2010 TC47, 2007 EJ, 2006 VA3, 4401
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2010-Y28 -- 2010 JL33
511Haute Provence Obs. in Germany, 1 in MPEC 2010-Y29 -- P/2002 VP94
H15ISON-NM Obs. in New Mexico, 2 in MPECs 2010-Y29 & 2010-Y30 -- P/2010 WK, P/2002 VP94
J28Jaen Obs. in Spain, 1 in MPEC 2010-Y28 -- 2010 RN80
900Moriyama Obs. in Japan, 1 in MPEC 2010-Y31 -- 2010 YH
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2010-Y31 -- 2010 YH
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 2 in MPECs 2010-Y29 & 2010-Y30 -- P/2010 WK, P/2002 VP94
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 2 in MPECs 2010-Y29 & 2010-Y30 -- P/2010 WK, P/2002 VP94
H36Sandlot Obs. in Kansas, 2 in MPECs 2010-Y28 & 2010-Y31 -- 2010 YH, 2010 XC25
204Schiaparelli Obs. in Italy, 15 in MPECs 2010-Y28, 2010-Y29, 2010-Y30 & 2010-Y31 -- 2010 YH, 2010 XZ58, 2010 XX58, 2010 XG11, 2010 XE11, 2010 XB25, 2010 XB24, 2010 WL, P/2010 WK, 2010 WJ, 2010 WB9, 2010 JL33, 2006 VB14, 2005 GC120, P/2002 VP94
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2010-Y28 & 2010-Y31 -- 2010 YH, 2010 XD11, 2010 OC101, 2010 LR68, 2001 CA32
H10Tzec Maun Obs. Mayhill in New Mexico, 2 in MPECs 2010-Y29 & 2010-Y30 -- P/2010 WK, P/2002 VP94
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 December '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
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
2010 XC25JPL Sentry19342048-207083.3e-05-2.30-2.341JPL: "Analysis based on 53 observations spanning 18.906 days (2010-Dec-08.37716 to 2010-Dec-27.28327)." Diameter approximately 0.250 km. from mean, weighted H=20.7.
NEODyS15592048-2083102.97e-05-2.34-2.420NEODyS: "Based on 53 optical observations (of which 1 are rejected as outliers) from 2010-12-08.378 to 2010-12-27.284."

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 27 December '10

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

2319Grabbed MPEC 2010-Y31 - 2010 YH - see above
1934Noted that JPL Sentry has updated its 2010 XC25 risk assessment - see above
Grabbed MPEC 2010-Y30 - Comet P/2010 WK (LINEAR) - see above
1835Grabbed MPEC 2010-Y29 - Comet P/2002 VP94 (LINEAR) - see above
1559Noted that NEODyS has updated its 2010 XC25 risk assessment - see above
Grabbed MPEC 2010-Y28 - Daily Orbit Update - see above