Contents  on 12 December '09

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NEOCP Activity  on 12 December '09

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and three updated listings. All of these were "one nighters." The Tracking News counted a total of ten listings on the NEOCP at some point on this day.

New MPECs  on 12 December '09

Minor Planet Electronic Circulars

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


MPEC 2009-X47 - "22:41 UT" - Comet P/2009 U6 = 1997 A2 = 2002 Q15 (LINEAR)


MPEC 2009-X46 - "22:18 UT" - 2009 XF2


MPEC 2009-X45 - "17:32 UT" - Twelve Sungrazing Comets


MPEC 2009-X44 - "14:21 UT" - 2009 XC2


MPEC 2009-X43 - "14:18 UT" - 2009 XB2


MPEC 2009-X42 - "14:16 UT" - 2009 XA2


MPEC 2009-X41 - "14:13 UT" - 2009 XZ1


<< DOU on 12 Dec. '09 >>  MPEC 2009-X40 - "07:09 UT" - Daily Orbit Update

Observers  on 12 December '09

A total of 31 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 10 in MPECs 2009-X40, 2009-X41 & 2009-X42 -- 2009 XZ1, 2009 XO, 2009 XA2, 2009 WR6, 2009 UZ17, 2009 SL104, 2009 SD229, 2009 RV1, 2005 UB, 1999 RM45
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-X40 -- 2009 XD
160Castelmartini Obs. in Italy, 9 in MPEC 2009-X40 -- 2009 XD, 2009 WZ104, 2009 WW25, 2004 XM35, 2002 WP, 1998 HJ3, 162998, 4015, 3200
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2009-X40, 2009-X41, 2009-X42 & 2009-X43 -- 2009 XZ1, 2009 XD, 2009 XB2, 2009 XA2, 2009 WW25, 2009 QD34, 2006 XA, 99248, 54401, 225416, 215188, 17274, 16816, 138893, 3553
A77Chante-Perdrix Obs. in France, 1 in MPEC 2009-X40 -- 54401
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 7 in MPEC 2009-X40 -- 2009 XD, 2009 WZ104, 2009 WX51, 2009 WW25, 2009 WL1, 2009 WF, 2002 WP
J95Great Shefford Obs. in England, 1 in MPEC 2009-X46 -- 2009 XF2
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-X40 -- 54789
442Gualba Obs. in Spain, 1 in MPEC 2009-X40 -- 4015
585Kiev Comet Station in the Ukraine, 1 in MPEC 2009-X47 -- P/2009 U6
6951Marc W. Buie via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2009-X40 -- 2009 SU19
704LINEAR in New Mexico, 8 in MPECs 2009-X40, 2009-X44 & 2009-X46 -- 2009 XV, 2009 XF2, 2009 XD, 2009 XC2, 2009 NA, 2006 UR, 2006 AO4, 85839
699LONEOS in Arizona, 2 in MPEC 2009-X40 -- 2009 ST19, 2009 SN98
J87La Canada Obs. in Spain, 1 in MPEC 2009-X44 -- 2009 XC2
J75La Sagra Obs. in Spain, 4 in MPECs 2009-X40 & 2009-X44 -- 2009 XD, 2009 XC2, 2009 WC26, 2004 XM35
J38La Vara Obs. in Spain, 1 in MPEC 2009-X40 -- 4015
932McCarthy Obs. in Connecticut, 8 in MPECs 2009-X40, 2009-X41 & 2009-X43 -- 2009 XZ1, 2009 XV, 2009 XO, 2009 XD, 2009 XB2, 2009 WZ104, 2009 WO6, 2009 WD11
A99Monte Baldo Obs. in Italy, 1 in MPEC 2009-X44 -- 2009 XC2
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2009-X40, 2009-X41 & 2009-X42 -- 2009 XZ1, 2009 XA2, 2009 TG10, 2006 XA, 2006 KQ21, 226219, 225586, 154244
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2009-X47 -- P/1997 A2
644NEAT's Mt. Palomar telescope in southern California, 2 in MPECs 2009-X40 & 2009-X47 -- 2009 TG8, P/2002 Q15
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2009-X47 -- P/2002 Q15
J47Nazaret Obs. in Spain, 1 in MPEC 2009-X40 -- 2009 XW1
C494HI1-A instrument (4) aboard STEREO-A in heliocentric orbit leading Earth, 12 in MPEC 2009-X45 -- C/2009 E4, C/2009 E2, C/2009 D7, C/2009 D5, C/2009 D4, C/2009 D3, C/2009 D2, C/2009 C4, C/2009 C3, C/2009 B9, C/2009 B8, C/2009 B11
C495COR2-A instrument (5) aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2009-X45 -- C/2009 C3
C505COR2-B instrument (5) aboard STEREO-B in heliocentric orbit trailing Earth, 1 in MPEC 2009-X45 -- C/2009 C3
434San Benedetto Po Obs. in Italy, 1 in MPEC 2009-X40 -- 2009 WZ104
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-X40 -- 2009 WM139
645Sloan Digital Sky Survey (SDSS) in New Mexico, 3 in MPEC 2009-X40 -- 2009 WD106, 2009 QB36, 2009 EK1
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-X40 -- 2009 WM139, 2008 AX28
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-X40 -- 2003 SM84
926Tenagra II Obs. in Arizona, 5 in MPECs 2009-X40, 2009-X41, 2009-X42, 2009-X43 & 2009-X44 -- 2009 XZ1, 2009 XC2, 2009 XB2, 2009 XA2, 2009 WC26
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 December '09

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.
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 XF2JPL Sentry23582024-2077144.1e-09-5.37-6.010JPL: "Analysis based on 8 observations spanning .64972 days (2009-Dec-12.26504 to 2009-Dec-12.91476)." Diameter approximately 0.519 km. from mean, weighted H=19.1.
2009 XC2JPL Sentry17002021-2104246.1e-09-3.91-4.530JPL: "Analysis based on 19 observations spanning 1.0548 days (2009-Dec-11.442 to 2009-Dec-12.49682)." Diameter approximately 1.400 km. from mean, weighted H=17.0.
2009 XR1NEODyS15372026-206833.79e-08-9.46-9.550NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2009/12/11.147 to 2009/12/11.374."
2009 XOJPL Sentry15372075-210552.3e-07-4.40-4.400JPL: "Analysis based on 62 observations spanning 3.0197 days (2009-Dec-09.152 to 2009-Dec-12.17168)." Diameter approximately 0.330 km. from mean, weighted H=20.0.
NEODyS15372034-205922.87e-10-6.79-6.800NEODyS: "Based on 62 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2009/12/12.172."

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 12 December '09

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

0602 12/13Grabbed MPEC 2009-X47 - Comet P/2009 U6 = 1997 A2 = 2002 Q15 (LINEAR) - see above
2358Noted that JPL Sentry has posted 2009 XF2 as an impact risk - see above
2301Grabbed MPEC 2009-X46 - 2009 XF2 - see above
1806Grabbed MPEC 2009-X45 - Twelve Sungrazing Comets - see above
1700Noted that JPL Sentry has posted 2009 XC2 as an impact risk - see above
1537Noted that JPL Sentry has updated its 2009 XO risk assessment - see above
Noted that NEODyS has updated its 2009 XO risk assessment - see above
Noted that NEODyS has posted 2009 XR1 as an impact risk - see above
Grabbed MPEC 2009-X40 - Daily Orbit Update - see above
Grabbed MPEC 2009-X41 - 2009 XZ1 - see above
Grabbed MPEC 2009-X42 - 2009 XA2 - see above
Grabbed MPEC 2009-X43 - 2009 XB2 - see above
Grabbed MPEC 2009-X44 - 2009 XC2 - see above