Contents  on 5 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 5 December '07

The MPC's NEO Confirmation Page has 13 listings: 6 new, 7 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had six new and seven updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of 36 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 5 December '07

Minor Planet Electronic Circulars

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


MPEC 2007-X24 - "23:18 UT" - 2007 XT3


MPEC 2007-X23 - "21:46 UT" - 2007 XQ3


MPEC 2007-X22 - "21:42 UT" - 2007 XP3


MPEC 2007-X21 - "20:48 UT" - 2007 XO3


MPEC 2007-X20 - "20:39 UT" - 2007 XN3


<< DOU on 5 Dec. '07 >>  MPEC 2007-X19 - "07:10 UT" - Daily Orbit Update

Observers  on 5 December '07

A total of 20 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2007-X19 -- 2007 VP243, 2007 VK3, 2007 VG189, 2007 UR3, 2007 UP6, 2007 OG3, 2007 LQ19
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2007-X19, 2007-X21 & 2007-X24 -- 2007 XT3, 2007 XO3, 2007 WV4, 2007 RU12
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2007-X19 -- 2007 OG3
448Desert Moon Obs. in New Mexico, 7 in MPEC 2007-X19 -- 2007 WV4, 2007 VT6, 2007 VH3, 2007 VH184, 2007 SJ, 2000 CH59, 154589
734Farpoint Obs. in Kansas, 1 in MPEC 2007-X19 -- 2007 OG3
143Gnosca Obs. in Switzerland, 1 in MPEC 2007-X20 -- 2007 XN3
B34Green Island Obs. in Cyprus, 2 in MPEC 2007-X19 -- 66272, 162142
715Jornada Obs. in New Mexico, 1 in MPEC 2007-X19 -- 2007 UM12
704LINEAR in New Mexico, 7 in MPECs 2007-X19, 2007-X20 & 2007-X22 -- 2007 XP3, 2007 XN3, 2007 XN, 2007 WV4, 2005 YW55, 170903, 162273
699LONEOS in Arizona, 2 in MPEC 2007-X19 -- 68063, 18736
J40Malaga Obs. in Spain, 1 in MPEC 2007-X19 -- 85804
J46Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2007-X19 -- 4544
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2007-X19 & 2007-X21 -- 2007 XO3, 2007 XN, 2007 VG189, 2007 UX1
A24New Millennium Obs. in Italy, 9 in MPEC 2007-X19 -- 2007 WF55, 1993 TQ2, 85804, 68359, 21374, 18736, 170903, 170891, 1580
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2007-X19 -- 2007 VW137, 2007 VQ4, 2007 SP6, 2007 RU12, 2005 TU45, 2002 XY4, 90403, 21374
473Remanzacco Obs. in Italy, 1 in MPEC 2007-X24 -- 2007 XT3
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2007-X24 -- 2007 XT3
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2007-X19 & 2007-X23 -- 2007 XQ3, 2007 WY3, 2007 RU12, 2007 OG3, 143404
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2007-X19, 2007-X20, 2007-X22 & 2007-X23 -- 2007 XQ3, 2007 XP3, 2007 XN3, 2007 WY3, 2007 WU4, 2007 WT4, 2007 WP3, 2007 WD5, 2007 VK184, 2007 VB3, 2007 UQ13, 2007 TU24, 2007 OG3, 2004 XK35, 2004 VA64, 1996 AJ1
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-X19 -- 2007 OG3

Impact Risk Monitoring  on 5 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 WY3JPL Sentry1330210111.6e-07-3.53-3.530JPL: "Analysis based on 34 observations spanning 16.088 days (2007-Nov-18.44048 to 2007-Dec-04.52816)." Diameter approximately 0.780 km. from mean, weighted H=18.2.
2007 VK184JPL Sentry13302046-2062157.5e-05-2.50-2.520JPL: "Analysis based on 83 observations spanning 22.938 days (2007-Nov-12.13904 to 2007-Dec-05.07674)." Diameter approximately 0.130 km. from mean, weighted H=22.0.
NEODyS13302033-2069287.31e-05-2.51-2.530NEODyS: "Based on 83 optical observations (of which 0 are rejected as outliers) from 2007/11/12.140 to 2007/12/05.077."

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 5 December '07

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

2332Grabbed MPEC 2007-X24 - 2007 XT3 - see above
2203Grabbed MPEC 2007-X21 - 2007 XO3 - see above
Grabbed MPEC 2007-X22 - 2007 XP3 - see above
Grabbed MPEC 2007-X23 - 2007 XQ3 - see above
2110Grabbed MPEC 2007-X20 - 2007 XN3 - see above
1332Grabbed MPEC 2007-X19 - Daily Orbit Update - see above
1330Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above
Noted that NEODyS has updated its 2007 VK184 risk assessment - see above
Noted that JPL Sentry has updated its 2007 WY3 risk assessment - see above