Contents  on 16 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 16 December '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were nine listings noted earlier today.

New MPECs  on 16 December '09

Minor Planet Electronic Circulars

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


MPEC 2009-Y16 - "19:23 UT" - Observations of Comets


MPEC 2009-Y15 - "18:58 UT" - Comet C/2009 W2 (Boattini)


MPEC 2009-Y14 - "18:38 UT" - Comet P/2009 W1 (Hill)


MPEC 2009-Y13 - "18:32 UT" - Comet P/2009 U4 (McNaught)


MPEC 2009-Y12 - "18:26 UT" - Comet C/2009 U3 (Hill)


MPEC 2009-Y11 - "18:20 UT" - Comet C/2009 T3 (LINEAR)


MPEC 2009-Y10 - "18:13 UT" - Comet C/2009 T1 (McNaught)


MPEC 2009-Y09 - "15:39 UT" - 2009 XL8


MPEC 2009-Y08 - "15:27 UT" - 2009 XK8


MPEC 2009-Y07 - "15:19 UT" - 2009 XJ8


MPEC 2009-Y06 - "15:11 UT" - 2009 XH8


MPEC 2009-Y05 - "15:07 UT" - 2009 XG8


MPEC 2009-Y04 - "15:01 UT" - 2009 XF8


MPEC 2009-Y03 - "14:53 UT" - 2009 YA


<< DOU on 16 Dec. '09 >>  MPEC 2009-Y02 - "07:11 UT" - Daily Orbit Update


MPEC 2009-Y01 - "00:22 UT" - 2009 XP7

Observers  on 16 December '09

A total of 73 observing facilities appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2009-Y16 -- 217P
349Ageo Obs. in Japan, 10 in MPECs 2009-Y11, 2009-Y12, 2009-Y13 & 2009-Y16 -- P/2009 U4, C/2009 U3, C/2009 T3, P/2009 T2, C/2009 R1, C/2006 W3, C/2006 OF2, 217P, 88P, 22P
J97Alginet Obs. in Spain, 5 in MPEC 2009-Y16 -- P/2009 T2, C/2008 P1, C/2007 N3, 157P, 30P
J10Alicante Obs. in Spain, 3 in MPECs 2009-Y12 & 2009-Y16 -- C/2009 U3, P/2009 T2, C/2008 P1
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2009-Y16 -- P/2008 T1
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2009-Y02 -- 2002 XN14
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 2 in MPECs 2009-Y06 & 2009-Y09 -- 2009 XL8, 2009 XH8
J51Atlante Obs. in the Canary Islands, 5 in MPEC 2009-Y16 -- P/2009 T2, 217P, 203P, 118P, 30P
467Auckland Obs. in New Zealand, 2 in MPEC 2009-Y16 -- P/2009 T2, P/2009 Q5
B96Brixiis Obs. in Belgium, 2 in MPECs 2009-Y12 & 2009-Y16 -- C/2009 U3, 157P
215Buchloe Obs. in Germany, 3 in MPEC 2009-Y16 -- C/2009 R1, C/2006 W3, 88P
235CAST Obs. in Italy, 15 in MPECs 2009-Y12 & 2009-Y16 -- C/2009 U3, P/2009 T2, P/2009 Q4, C/2008 P1, C/2007 N3, C/2006 OF2, 217P, 157P, 137P, 118P, 94P, 81P, 30P, 29P, 22P
I10Campo Catino Austral Obs. (CAO) in Chile, 3 in MPEC 2009-Y16 -- 68P, 31P, 29P
B20Carmelita Obs. in Spain, 1 in MPEC 2009-Y16 -- 217P
160Castelmartini Obs. in Italy, 11 in MPECs 2009-Y11, 2009-Y12 & 2009-Y16 -- C/2009 U3, C/2009 T3, P/2009 T2, C/2008 S3, C/2007 N3, C/2006 W3, 203P, 157P, 127P, 68P, 22P
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2009-Y02, 2009-Y08, 2009-Y11 & 2009-Y16 -- 2009 XK8, C/2009 T3, P/2009 T2, C/2008 S3, 2005 TY51, 2005 QL, 2004 XD50, 86326, 35396, 10150, 30P
A77Chante-Perdrix Obs. in France, 6 in MPEC 2009-Y16 -- P/2009 SK280, 217P, 157P, 127P, 88P, 29P
J01Cielo Profundo Obs. in Spain, 8 in MPECs 2009-Y12 & 2009-Y16 -- C/2009 U3, P/2009 T2, C/2007 N3, 217P, 157P, 118P, 47P, 30P
978Conder Brow Obs., 2 in MPEC 2009-Y16 -- 217P, 118P
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-Y16 -- P/2009 T2
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 4 in MPECs 2009-Y02 & 2009-Y09 -- 2009 XV, 2009 XO2, 2009 XL8, 2009 XD
808El Leoncito Obs. in Argentina, 1 in MPEC 2009-Y16 -- C/2007 G1
372Geisei Obs. in Japan, 3 in MPECs 2009-Y11, 2009-Y15 & 2009-Y16 -- C/2009 W2, C/2009 T3, P/2009 O3
B83Gieres Obs. in France, 4 in MPECs 2009-Y12 & 2009-Y16 -- C/2009 U3, 217P, 118P, 30P
143Gnosca Obs. in Switzerland, 1 in MPEC 2009-Y01 -- 2009 XP7
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-Y16 -- C/2007 G1
442Gualba Obs. in Spain, 1 in MPEC 2009-Y16 -- 29P
379Hamamatsu-Yuto Obs. in Japan, 6 in MPECs 2009-Y02 & 2009-Y16 -- 2009 XD, 2009 WZ104, 2009 NA, 2002 XN14, 2002 WP, 217P
415Kambah Obs. in the Australian Capital Territory, 14 in MPECs 2009-Y10, 2009-Y13 & 2009-Y16 -- P/2009 U4, P/2009 T2, C/2009 T1, P/2009 Q5, P/2009 Q4, C/2009 P1, C/2009 O4, C/2009 F6, C/2007 N3, C/2007 G1, 217P, 137P, 118P, 30P
585Kiev Comet Station in the Ukraine, 1 in MPEC 2009-Y12 -- C/2009 U3
400Kitami Obs. in Japan, 1 in MPEC 2009-Y16 -- P/2009 O3
D95Kurihara Obs., 6 in MPEC 2009-Y16 -- C/2007 Q3, C/2006 W3, 217P, 118P, 88P, 22P
704LINEAR in New Mexico, 25 in MPECs 2009-Y01, 2009-Y02, 2009-Y09, 2009-Y12, 2009-Y14 & 2009-Y16 -- 2009 XT6, 2009 XP7, 2009 XL8, 2009 WZ7, 2009 WF, P/2009 W1, 2009 UV18, P/2009 U6, C/2009 U3, P/2009 Q4, C/2007 N3, 2006 AO4, 68359, 226554, 6456, 5653, 217P, 203P, 157P, 127P, 94P, 81P, 47P, 31P, 30P
J31La Axarquia Obs. in Spain, 1 in MPEC 2009-Y16 -- 217P
J76La Murta Obs. in Spain, 2 in MPEC 2009-Y16 -- C/2007 N3, 30P
J75La Sagra Obs. in Spain, 3 in MPEC 2009-Y16 -- P/2009 U6, C/2008 S3, 94P
J38La Vara Obs. in Spain, 14 in MPECs 2009-Y02 & 2009-Y16 -- P/2009 T2, C/2008 P1, C/2007 N3, C/2006 OF2, 4015, 217P, 157P, 127P, 118P, 94P, 31P, 30P, 29P, 22P
B33Libbiano Obs. in Italy, 1 in MPEC 2009-Y09 -- 2009 XL8
130Lumezzane Obs. in Italy, 2 in MPEC 2009-Y16 -- C/2008 S3, 137P
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2009-Y02, 2009-Y03, 2009-Y04, 2009-Y05, 2009-Y06, 2009-Y07, 2009-Y08 & 2009-Y09 -- 2009 YA, 2009 XZ6, 2009 XL8, 2009 XK8, 2009 XJ8, 2009 XH8, 2009 XG8, 2009 XF8
B82Maidbronn Obs. in Germany, 1 in MPEC 2009-Y16 -- C/2008 P1
232Masquefa Obs. in Spain, 1 in MPEC 2009-Y16 -- 203P
A06Mataro Obs. in Spain, 5 in MPEC 2009-Y16 -- P/2009 T2, 217P, 157P, 88P, 22P
932McCarthy Obs. in Connecticut, 1 in MPEC 2009-Y09 -- 2009 XL8
213Montcabre Obs. in Spain, 1 in MPEC 2009-Y11 -- C/2009 T3
945Monte Deva Obs. in Spain, 7 in MPEC 2009-Y16 -- P/2009 Q4, C/2007 Q3, C/2007 N3, 217P, 118P, 81P, 30P
900Moriyama Obs. in Japan, 11 in MPECs 2009-Y12 & 2009-Y16 -- C/2009 U3, P/2009 Q5, C/2007 N3, 217P, 137P, 118P, 68P, 47P, 43P, 30P, 22P
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2009-Y02, 2009-Y03, 2009-Y04, 2009-Y05, 2009-Y06, 2009-Y07, 2009-Y08 & 2009-Y16 -- 2009 YA, 2009 XT6, 2009 XO, 2009 XK8, 2009 XJ8, 2009 XH8, 2009 XG8, 2009 XF8, P/2009 SK280, 2006 XA, P/2005 Y2, 222008, 154300, 152560
D81Nagano Obs. in Japan, 1 in MPEC 2009-Y16 -- P/2009 T2
J47Nazaret Obs. in Spain, 11 in MPECs 2009-Y11, 2009-Y14 & 2009-Y16 -- P/2009 W1, C/2009 T3, P/2009 T2, P/2009 Q4, C/2007 Q3, C/2006 W3, 217P, 88P, 81P, 29P, 22P
423North Ryde Obs. in New South Wales, 3 in MPECs 2009-Y10 & 2009-Y16 -- C/2009 T1, C/2009 P1, C/2007 G1
D92Osaki Obs. in Japan, 4 in MPEC 2009-Y16 -- C/2008 P1, C/2006 W3, 157P, 22P
B49Paus Obs. in Spain, 2 in MPEC 2009-Y16 -- 217P, 137P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2009-Y16 -- C/2008 P1, 217P, 43P, 30P
H06RAS Obs. Mayhill in New Mexico, 8 in MPECs 2009-Y12 & 2009-Y16 -- C/2009 U3, P/2009 Q4, C/2008 S3, C/2008 Q3, C/2007 Q3, 217P, 157P, 81P
D90RAS Obs. Moorook in South Australia, 2 in MPEC 2009-Y16 -- C/2009 R1, C/2009 O4
473Remanzacco Obs. in Italy, 4 in MPECs 2009-Y09, 2009-Y12, 2009-Y14 & 2009-Y16 -- 2009 XL8, P/2009 W1, C/2009 U3, P/2009 T2
939Rodeno Obs. in Spain, 4 in MPEC 2009-Y16 -- P/2009 T2, 157P, 43P, 22P
C09Rouet Obs., 1 in MPEC 2009-Y16 -- 217P
461SZTE Asteroid Program in Hungary, 3 in MPECs 2009-Y14 & 2009-Y16 -- P/2009 W1, P/2009 U6, C/2008 S3
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2009-Y12 & 2009-Y15 -- C/2009 W2, C/2009 U3
H36Sandlot Obs. in Kansas, 2 in MPECs 2009-Y02 & 2009-Y08 -- 2009 XT6, 2009 XK8
B74Santa Maria de Montmagastrell Obs. in Spain, 9 in MPECs 2009-Y02, 2009-Y11 & 2009-Y16 -- 2009 WF, C/2009 T3, P/2009 Q4, C/2008 S3, C/2007 Q3, 217P, 118P, 81P, 30P
204Schiaparelli Obs. in Italy, 13 in MPECs 2009-Y01, 2009-Y02, 2009-Y09 & 2009-Y16 -- 2009 XZ6, 2009 XP7, 2009 XL8, 2009 WW25, 2009 WD11, 2009 WD106, C/2008 S3, 2005 TY51, 2002 XN14, 2000 WK10, 203P, 47P, 30P
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-Y16 -- P/2005 Y2
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2009-Y04, 2009-Y05, 2009-Y08 & 2009-Y16 -- 2009 XK8, 2009 XG8, 2009 XF8, C/2008 S3
I19Tanti Obs. in Argentina, 1 in MPEC 2009-Y16 -- C/2009 F6
926Tenagra II Obs. in Arizona, 7 in MPECs 2009-Y02, 2009-Y08, 2009-Y09 & 2009-Y16 -- 2009 XZ1, 2009 XP7, 2009 XP2, 2009 XL8, 2009 XK8, 2009 XF2, C/2008 S3
H10Tzec Maun Obs. Mayhill in New Mexico, 6 in MPEC 2009-Y16 -- P/2009 Q4, C/2008 Q3, C/2007 Q3, 118P, 30P, 29P
D25Tzec Maun Obs. Pingelly in Western Australia, 1 in MPEC 2009-Y16 -- 30P
B51Vallauris Obs. in France, 1 in MPEC 2009-Y16 -- 157P
C00Velikie Luki Obs. in Russia, 2 in MPEC 2009-Y02 -- 2009 RN, 2002 WP
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2009-Y02 -- 162273
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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 XJ8JPL Sentry1746201112.3e-10-6.15-6.150JPL: "Analysis based on 16 observations spanning 1.0595 days (2009-Dec-15.18816 to 2009-Dec-16.24761)." Diameter approximately 0.210 km. from mean, weighted H=21.0.
2009 XG8JPL Sentry17462024-2107172.2e-08-4.08-4.710JPL: "Analysis based on 19 observations spanning 1.1053 days (2009-Dec-15.11126 to 2009-Dec-16.21657)." Diameter approximately 0.530 km. from mean, weighted H=19.0.
2009 XT6JPL Sentry15372037-207142.1e-06-2.76-2.830JPL: "Analysis based on 29 observations spanning 2.1212 days (2009-Dec-13.4056 to 2009-Dec-15.52682)." Diameter approximately 0.343 km. from mean, weighted H=20.0.
NEODyS15372037-207121.97e-06-2.80-2.870NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2009/12/13.406 to 2009/12/15.528."
2009 XONEODyS1537207011.03e-10-7.68-7.680NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2009/12/15.375."
2005 TM173NEODyS18242010-20871224.21e-07-5.82-6.570NEODyS: "Based on 6 optical observations (of which 0 are rejected as outliers) from 2005/10/09.201 to 2005/10/11.148."

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 16 December '09

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

2029Grabbed MPEC 2009-Y16 - Observations of Comets - see above
1936Grabbed MPEC 2009-Y13 - Comet P/2009 U4 (McNaught) - see above
Grabbed MPEC 2009-Y14 - Comet P/2009 W1 (Hill) - see above
Grabbed MPEC 2009-Y15 - Comet C/2009 W2 (Boattini) - see above
1834Grabbed MPEC 2009-Y10 - Comet C/2009 T1 (McNaught) - see above
Grabbed MPEC 2009-Y11 - Comet C/2009 T3 (LINEAR) - see above
Grabbed MPEC 2009-Y12 - Comet C/2009 U3 (Hill) - see above
1824Noted that NEODyS has updated its 2005 TM173 risk assessment - see above
1746Noted that JPL Sentry has posted 2009 XG8 as an impact risk - see above
Noted that JPL Sentry has posted 2009 XJ8 as an impact risk - see above
Grabbed MPEC 2009-Y09 - 2009 XL8 - see above
Noted that the NEOCP has become empty
1537Noted that NEODyS has updated its 2009 XO risk assessment - see above
Noted that JPL Sentry has updated its 2009 XT6 risk assessment - see above
Noted that NEODyS has updated its 2009 XT6 risk assessment - see above
Grabbed MPEC 2009-Y02 - Daily Orbit Update - see above
Grabbed MPEC 2009-Y03 - 2009 YA - see above
Grabbed MPEC 2009-Y04 - 2009 XF8 - see above
Grabbed MPEC 2009-Y05 - 2009 XG8 - see above
Grabbed MPEC 2009-Y06 - 2009 XH8 - see above
Grabbed MPEC 2009-Y07 - 2009 XJ8 - see above
Grabbed MPEC 2009-Y08 - 2009 XK8 - see above
0243Grabbed MPEC 2009-Y01 - 2009 XP7 - see above