Contents  on 10 December '07

Resources:

The latest news: framed access (best), RSS news feed RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site, which now has its own backup 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 this year 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 '07

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

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and one updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of seven objects listed on the NEOCP at some point today.

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 10 December '07

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been eleven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2007-X50 - "17:46 UT" - 2007 XJ16


MPEC 2007-X49 - "16:54 UT" - Observations of Comets


MPEC 2007-X48 - "16:33 UT" - Comet C/2007 W3 (LINEAR)


MPEC 2007-X47 - "16:29 UT" - Comet C/2007 W1 (Boattini)


MPEC 2007-X46 - "16:25 UT" - Comet P/2007 V2 (Hill)


MPEC 2007-X45 - "16:22 UT" - Comet C/2007 U1 (LINEAR)


MPEC 2007-X44 - "16:18 UT" - Comet P/2007 T6 (Catalina)


MPEC 2007-X43 - "16:11 UT" - Comet C/2007 T5 (Gibbs)


MPEC 2007-X42 - "16:08 UT" - Comet P/2007 T2 (Kowalski)


MPEC 2007-X41 - "15:24 UT" - 2007 XH16


<< DOU on 10 Dec. '07 >>  MPEC 2007-X40 - "07:10 UT" - Daily Orbit Update

Observers  on 10 December '07

A total of 54 observing facilities appear in today's MPECs.

CodeObserver / observatory
H077300 Obs. in New Mexico, 1 in MPEC 2007-X49 -- 172P
349Ageo Obs. in Japan, 13 in MPECs 2007-X42, 2007-X43, 2007-X48 & 2007-X49 -- C/2007 W3, C/2007 T5, P/2007 T2, P/2007 C2, C/2007 B2, C/2006 M1, C/2006 K3, C/2006 K1, 173P, 172P, 70P, 46P, 29P
J97Alginet Obs. in Spain, 5 in MPEC 2007-X49 -- P/2007 H1, C/2006 W3, C/2006 OF2, 188P, 17P
B37Ametlla del Valles Obs. in Spain, 3 in MPEC 2007-X49 -- 110P, 74P, 29P
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2007-X50 -- 2007 XJ16
215Buchloe Obs. in Germany, 3 in MPECs 2007-X46 & 2007-X49 -- P/2007 V2, 190P, 150P
235CAST Obs. in Italy, 9 in MPEC 2007-X49 -- P/2007 H1, C/2006 OF2, 110P, 93P, 50P, 46P, 29P, 17P, 8P
B09Capannoli Obs. in Italy, 2 in MPEC 2007-X49 -- 110P, 29P
B20Carmelita Obs. in Spain, 6 in MPEC 2007-X49 -- P/2007 H1, 93P, 50P, 29P, 17P, 8P
703Catalina Sky Survey in Arizona, 1 in MPEC 2007-X44 -- P/2007 T6
B24Cesson Obs. in France, 2 in MPEC 2007-X49 -- 50P, 17P
A77Chante-Perdrix Obs. in France, 3 in MPEC 2007-X49 -- 150P, 17P, 8P
J36El Olivo Obs., 6 in MPEC 2007-X49 -- P/2007 H1, C/2006 W3, C/2006 S5, 74P, 29P, 17P
372Geisei Obs. in Japan, 3 in MPEC 2007-X49 -- 46P, 17P, 8P
683Goodricke-Pigott Obs. in Arizona, 2 in MPEC 2007-X49 -- P/2004 F3, 188P
J95Great Shefford Obs. in England, 1 in MPEC 2007-X49 -- 17P
B34Green Island Obs. in Cyprus, 1 in MPEC 2007-X49 -- 17P
458Guadarrama Obs. in Spain, 3 in MPEC 2007-X49 -- 93P, 29P, 17P
442Gualba Obs. in Spain, 2 in MPEC 2007-X49 -- 29P, 17P
379Hamamatsu-Yuto Obs. in Japan, 9 in MPECs 2007-X40 & 2007-X49 -- 2007 VQ4, 2007 SP6, 2007 PU11, 2003 BH84, 110P, 93P, 50P, 29P, 17P
987Isle of Man Obs. on the Isle of Man, 3 in MPEC 2007-X49 -- 93P, 17P, 8P
701Junk Bond Obs. in Arizona, 1 in MPEC 2007-X48 -- C/2007 W3
415Kambah Obs. in Australia, 6 in MPECs 2007-X45 & 2007-X49 -- C/2007 U1, C/2007 Q3, P/2007 H1, C/2006 Q1, C/2006 K1, 192P
585Kiev Comet Station in the Ukraine, 5 in MPECs 2007-X43, 2007-X45, 2007-X47 & 2007-X49 -- C/2007 W1, C/2007 U1, C/2007 T5, C/2007 S2, 50P
704LINEAR in New Mexico, 6 in MPEC 2007-X49 -- P/2007 V1, C/2007 E1, C/2006 S5, 173P, 128P, 74P
699LONEOS in Arizona, 6 in MPEC 2007-X49 -- C/2007 S2, P/2007 C2, C/2006 S5, C/2006 M1, 128P, 70P
J76La Murta Obs. in Spain, 1 in MPEC 2007-X49 -- C/2006 S5
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2007-X40 -- 2005 TF50
130Lumezzane Obs. in Italy, 4 in MPEC 2007-X49 -- P/2007 W2, C/2007 S2, C/2006 K3, 108P
A01Masia Cal Maciarol Modul 1 (MCM1), 2 in MPEC 2007-X49 -- 17P, 8P
232Masquefa Obs. in Spain, 11 in MPEC 2007-X49 -- C/2007 B2, C/2006 W3, C/2006 S5, 188P, 173P, 93P, 74P, 50P, 29P, 17P, 8P
A06Mataro Obs. in Spain, 2 in MPEC 2007-X49 -- C/2006 W3, 17P
J46Montana Blanca Obs. in the Canary Islands, 3 in MPECs 2007-X45 & 2007-X49 -- P/2007 W2, P/2007 V1, C/2007 U1
213Montcabre Obs. in Spain, 12 in MPECs 2007-X42, 2007-X43, 2007-X47, 2007-X48 & 2007-X49 -- C/2007 W3, P/2007 W2, C/2007 W1, P/2007 V1, C/2007 T5, P/2007 T2, 110P, 93P, 50P, 29P, 17P, 8P
945Monte Deva Obs. in Spain, 9 in MPEC 2007-X49 -- P/2007 H1, C/2006 S5, C/2006 OF2, 110P, 93P, 46P, 29P, 17P, 8P
900Moriyama Obs. in Japan, 2 in MPEC 2007-X49 -- 93P, 17P
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2007-X49 -- 173P, 150P, 108P, 74P
J47Nazaret Obs. in Spain, 8 in MPECs 2007-X42, 2007-X44, 2007-X46 & 2007-X49 -- P/2007 W2, P/2007 V2, P/2007 V1, P/2007 T6, P/2007 T2, P/2007 R1, 50P, 17P
423North Ryde Obs. in New South Wales, 1 in MPEC 2007-X49 -- C/2007 Q3
A32Panker Obs. in Germany, 7 in MPEC 2007-X49 -- C/2007 E1, C/2006 M1, 110P, 93P, 50P, 29P, 8P
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2007-X49 -- 17P
561Piszkesteto Sta. in Hungary, 8 in MPECs 2007-X43, 2007-X44, 2007-X46, 2007-X47, 2007-X48 & 2007-X49 -- C/2007 W3, P/2007 W2, C/2007 W1, P/2007 V2, P/2007 T6, C/2007 T5, C/2007 S2, 17P
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-X49 -- 17P
H06%E. Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-X41 -- 2007 XH16
939Rodeno Obs. in Spain, 6 in MPEC 2007-X49 -- P/2007 H1, C/2006 W3, C/2006 S5, 93P, 29P, 17P
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2007-X48 -- C/2007 W3
233San Vito Obs. in Italy, 1 in MPEC 2007-X49 -- C/2006 OF2
204Schiaparelli Obs. in Italy, 1 in MPEC 2007-X49 -- P/2007 R1
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2007-X41 & 2007-X49 -- 2007 XH16, 192P
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2007-X49 & 2007-X50 -- 2007 XJ16, 190P, 173P, 128P
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2007-X50 -- 2007 XJ16
629Szeged Obs. in Hungary, 2 in MPEC 2007-X49 -- 110P, 8P
B26Terres Blanches Obs. in France, 2 in MPEC 2007-X49 -- 50P, 17P
A92Urseanu Obs. in Romania, 1 in MPEC 2007-X49 -- 8P
J70Vega del Thader Obs. in Spain, 8 in MPEC 2007-X49 -- C/2007 S2, C/2006 S5, 110P, 93P, 74P, 50P, 29P, 17P

Impact Risk Monitoring  on 10 December '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks.
Note that the time horizon for JPL is 100 years from today and for NEODyS is now 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
2007 XJ16JPL Sentry23242011-2106936.9e-08-4.17-4.690JPL: "Analysis based on 11 observations spanning .97312 days (2007-Dec-05.38279 to 2007-Dec-06.355912)." Diameter approximately 0.460 km. from mean, weighted H=19.3.

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 '07

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

2324Noted that JPL Sentry has posted 2007 XJ16 as an impact risk - see above
1843Grabbed MPEC 2007-X50 - 2007 XJ16 - see above
1716Grabbed MPEC 2007-X41 - 2007 XH16 - see above
Grabbed MPEC 2007-X42 - Comet P/2007 T2 (Kowalski) - see above
Grabbed MPEC 2007-X43 - Comet C/2007 T5 (Gibbs) - see above
Grabbed MPEC 2007-X44 - Comet P/2007 T6 (Catalina) - see above
Grabbed MPEC 2007-X45 - Comet C/2007 U1 (LINEAR) - see above
Grabbed MPEC 2007-X46 - Comet P/2007 V2 (Hill) - see above
Grabbed MPEC 2007-X47 - Comet C/2007 W1 (Boattini) - see above
Grabbed MPEC 2007-X48 - Comet C/2007 W3 (LINEAR) - see above
Grabbed MPEC 2007-X49 - Observations of Comets - see above
1448Grabbed MPEC 2007-X40 - Daily Orbit Update - see above