Contents  on 6 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 6 December '07

The MPC's NEO Confirmation Page has 8 listings: 3 new, 5 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and five updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of 22 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 6 December '07

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been nine MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2007-X33 - "19:17 UT" - 2005 VT5


MPEC 2007-X32 - "18:21 UT" - 2007 XD10


MPEC 2007-X31 - "18:18 UT" - 2007 XC10


MPEC 2007-X30 - "18:16 UT" - 2007 XB10


MPEC 2007-X29 - "18:13 UT" - 2007 XA10


MPEC 2007-X28 - "18:11 UT" - 2007 XZ9


MPEC 2007-X27 - "18:07 UT" - 2007 XY9


<< DOU on 6 Dec. '07 >>  MPEC 2007-X26 - "07:11 UT" - Daily Orbit Update


MPEC 2007-X25 - "03:27 UT" - 2007 RH283

Observers  on 6 December '07

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 3 in MPECs 2007-X26, 2007-X28 & 2007-X31 -- 2007 XZ9, 2007 XT3, 2007 XC10
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPECs 2007-X30 & 2007-X33 -- 2007 XB10, 2005 VT5
B09Capannoli Obs. in Italy, 1 in MPEC 2007-X26 -- 2007 TG15
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2007-X26 & 2007-X27 -- 2007 XY9, 2007 XN, 2007 VH184, 2003 AD1, 2001 JM1, 40267, 35107, 162173, 11405, 11398
448Desert Moon Obs. in New Mexico, 6 in MPEC 2007-X26 -- 2007 TX18, 2007 RU17, 2007 LQ19, 2005 XW77, 2003 AD1, 7482
151Eschenberg Obs. in Switzerland, 2 in MPEC 2007-X26 -- 2007 WF55, 2003 BH84
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2007-X28 & 2007-X31 -- 2007 XZ9, 2007 XC10
651Grasslands Obs. in Arizona, 4 in MPECs 2007-X27, 2007-X28, 2007-X29 & 2007-X31 -- 2007 XZ9, 2007 XY9, 2007 XC10, 2007 XA10
J95Great Shefford Obs. in England, 2 in MPECs 2007-X28 & 2007-X31 -- 2007 XZ9, 2007 XC10
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2007-X26 -- 2007 VQ4, 2007 SP6, 2003 BH84
J37Huelva Obs. in Spain, 2 in MPEC 2007-X26 -- 3200, 1036
704LINEAR in New Mexico, 10 in MPECs 2007-X26, 2007-X27, 2007-X28 & 2007-X29 -- 2007 XZ9, 2007 XY9, 2007 XP3, 2007 XN3, 2007 XA10, 2007 LR32, 96189, 162142, 8034, 3553
699LONEOS in Arizona, 10 in MPEC 2007-X26 -- 2007 SP6, 2005 YW55, 2004 BV102, 2002 XY4, 1994 AW1, 90403, 21374, 162273, 4503, 1864
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2007-X26, 2007-X28 & 2007-X31 -- 2007 XZ9, 2007 XC10, 2007 VL8, 2007 BM8, 2000 JN10
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2007-X25 -- 2007 RH283
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 14 in MPEC 2007-X26 -- 2007 WV4, 2007 WF55, 2007 WE55, 2007 UX1, 2007 PU11, 2005 YW55, 2001 FZ6, 1993 TQ2, 68359, 18736, 170891, 153591, 153201, 138852
473Remanzacco Obs. in Italy, 1 in MPEC 2007-X31 -- 2007 XC10
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2007-X31 -- 2007 XC10
691Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2007-X26, 2007-X30 & 2007-X32 -- 2007 XD10, 2007 XB10, 68063, 162273, 153201, 138947, 8034
291Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2007-X26, 2007-X30 & 2007-X32 -- 2007 XD10, 2007 XB10, 2007 WY3, 2007 WP3, 2007 WD5, 2007 VJ8, 2007 MK13, 2006 HX5, 2006 BA148, 2005 CZ36, 2004 LZ5, 2004 BH41, 2002 RQ25
6967Tim Spahr via Whipple Obs. in Arizona, 27 in MPEC 2007-X26 -- 2007 WA, 2007 VW83, 2007 VH8, 2007 UY1, 2007 UR, 2007 UM12, 2007 TU24, 2007 TO74, 2007 TL23, 2007 TJ19, 2007 TH72, 2007 TH19, 2007 RH1, 2007 PV27, 2007 EH88, 2006 SP134, 2006 KT1, 2005 XK8, 2005 LW39, 2004 SB20, 2004 FU64, 2003 YS117, 2003 YQ94, 2001 QH142, 1999 AQ10, 1997 XV11, 6491

Impact Risk Monitoring  on 6 December '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2355 and JPL at 2356 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 XD10JPL Sentry21012010-2086326.5e-09-4.98-5.250JPL: "Analysis based on 8 observations spanning .87834 days (2007-Dec-05.44337 to 2007-Dec-06.32171)." Diameter approximately 0.274 km. from mean, weighted H=20.5.
2007 XZ9JPL Sentry23562056-208941.6e-06-5.68-6.010JPL: "Analysis based on 28 observations spanning 2.1041 days (2007-Dec-04.19408 to 2007-Dec-06.29819)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
2007 WP3JPL Sentry23562098-2106115.5e-06-4.81-5.180JPL: "Analysis based on 57 observations spanning 16.940 days (2007-Nov-18.26457 to 2007-Dec-05.2041)." Diameter approximately 0.067 km. from mean, weighted H=23.5.

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 6 December '07

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

2356Noted that JPL Sentry has updated its 2007 WP3 risk assessment - see above
Noted that JPL Sentry has posted 2007 XZ9 as an impact risk - see above
2101Noted that JPL Sentry has posted 2007 XD10 as an impact risk - see above
1937Grabbed MPEC 2007-X33 - 2005 VT5 - see above
1833Grabbed MPEC 2007-X28 - 2007 XZ9 - see above
Grabbed MPEC 2007-X29 - 2007 XA10 - see above
Grabbed MPEC 2007-X30 - 2007 XB10 - see above
Grabbed MPEC 2007-X31 - 2007 XC10 - see above
Grabbed MPEC 2007-X32 - 2007 XD10 - see above
1809Grabbed MPEC 2007-X27 - 2007 XY9 - see above
1706Grabbed MPEC 2007-X26 - Daily Orbit Update - see above
0401Grabbed MPEC 2007-X25 - 2007 RH283 - see above