Contents  on 10 December '09

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 10 December '09

The MPC's NEO Confirmation Page has 7 listings: 4 new, 3 updated

When last checked at 2313 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and three updated listings. Of these, four were "one nighters."

New MPECs  on 10 December '09

Minor Planet Electronic Circulars

There were three MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-X33 - "23:26 UT" - 2009 XV


<< DOU on 10 Dec. '09 >>  MPEC 2009-X32 - "07:08 UT" - Daily Orbit Update


MPEC 2009-X31 - "00:01 UT" - 2009 XO

Observers  on 10 December '09

A total of 28 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 12 in MPEC 2009-X32 -- 2009 WZ7, 2009 WL1, 2009 WF104, 2009 WF, 2009 UX17, 2009 RN, 2009 QD34, 2009 NA, 2009 MX6, 2007 UR3, 2006 UR, 2000 GU127
160Castelmartini Obs. in Italy, 5 in MPEC 2009-X32 -- 2009 XO, 2009 WZ104, 2002 NW16, 12711, 9202
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2009 WG106
J27El Guijo Obs. in Spain, 2 in MPEC 2009-X32 -- 2009 WZ104, 2005 RQ6
151Eschenberg Obs. in Switzerland, 4 in MPECs 2009-X31 & 2009-X32 -- 2009 XO, 2009 XD, 2009 WZ104, 2008 WB59
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-X31 -- 2009 XO
J95Great Shefford Obs. in England, 1 in MPEC 2009-X33 -- 2009 XV
442Gualba Obs. in Spain, 1 in MPEC 2009-X32 -- 4015
704LINEAR in New Mexico, 5 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2009 WF, 2009 ST19, 226198, 138852
J75La Sagra Obs. in Spain, 3 in MPECs 2009-X31 & 2009-X32 -- 2009 XO, 1998 HJ3, 35396
560Madonna di Dossobuono Obs. in Italy, 5 in MPEC 2009-X32 -- 2009 XD, 2009 WZ104, 2009 WX51, 2009 WD11, 2009 ST19
568[Ovidiu Vaduvescu on Mauna Kea in Hawaii, 18 in MPEC 2009-X32 -- 2008 RZ24, 2008 OX2, 2008 ED69, 2008 CR118, 2008 AF4, 2004 UL, 2004 BE86, 87311, 68359, 54071, 209924, 171819, 164342, 153315, 7092, 6569, 4587, 2059
932McCarthy Obs. in Connecticut, 4 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2009 WZ104, 2009 WD11, 2002 WP
A99Monte Baldo Obs. in Italy, 2 in MPECs 2009-X31, 2009-X32 & 2009-X33 -- 2009 XV, 2009 XO
A13Naef Obs. in Switzerland, 2 in MPEC 2009-X32 -- 2009 QD34, 2009 KN4
J47Nazaret Obs. in Spain, 1 in MPEC 2009-X32 -- 4015
A24New Millennium Obs. in Italy, 2 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2009 XO
B49Paus Obs. in Spain, 3 in MPECs 2009-X31, 2009-X32 & 2009-X33 -- 2009 XV, 2009 XO, 2009 XD
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-X33 -- 2009 XV
J41Raheny Obs. in Ireland, 1 in MPEC 2009-X33 -- 2009 XV
473Remanzacco Obs. in Italy, 1 in MPEC 2009-X33 -- 2009 XV
939Rodeno Obs. in Spain, 1 in MPEC 2009-X32 -- 4015
434San Benedetto Po Obs. in Italy, 2 in MPEC 2009-X32 -- 2002 WP, 4015
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-X33 -- 2009 XV
204Schiaparelli Obs. in Italy, 2 in MPECs 2009-X31 & 2009-X33 -- 2009 XV, 2009 XO
926Tenagra II Obs. in Arizona, 2 in MPECs 2009-X32 & 2009-X33 -- 2009 XV, 2007 WV3
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-X33 -- 2009 XV
A48Verona Obs. in Italy, 2 in MPEC 2009-X32 -- 2009 XD, 2009 MX6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 December '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2323 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few 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
2009 XOJPL Sentry15402015-21093476.7e-06-2.57-3.210JPL #2 for the day: "Analysis based on 48 observations spanning 1.0240 days (2009-Dec-09.152 to 2009-Dec-10.17595)." Diameter approximately 0.345 km. from mean, weighted H=20.0.
NEODyS15402015-2087432.98e-06-2.71-3.230NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2009/12/10.177."
2008 AF4JPL Sentry15402099-210025.9e-07-3.93-3.930JPL: "Analysis based on 607 observations spanning 296.97 days (2007-Jul-28.349 to 2008-May-20.315005)." Diameter approximately 0.400 km. from mean, weighted H=19.7.

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 10 December '09

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

0004 12/11Grabbed MPEC 2009-X33 - 2009 XV - see above
1540Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has updated its 2009 XO risk assessment - see above
Noted that NEODyS has posted 2009 XO as an impact risk - see above
Grabbed MPEC 2009-X32 - Daily Orbit Update - see above
0532Noted that JPL Sentry has posted 2009 XO as an impact risk - see above
0017Grabbed MPEC 2009-X31 - 2009 XO - see above