Contents  on 24 December '08

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 24 December '08

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of three 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 24 December '08

Minor Planet Electronic Circulars

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


<< DOU on 24 Dec. '08 >>  MPEC 2008-Y50 - "07:06 UT" - Daily Orbit Update


MPEC 2008-Y49 - "04:01 UT" - 2008 JY30

Observers  on 24 December '08

A total of 37 observing facilities appear in today's MPECs.

CodeObserver / observatory
J51Atlante Obs. in the Canary Islands, 4 in MPEC 2008-Y50 -- 2008 SQ1, 2008 EV5, 142348, 7358
493Calar Alto Obs. in Spain, 1 in MPEC 2008-Y49 -- 2008 JY30
B80Campomaggiore Obs., 1 in MPEC 2008-Y50 -- 4179
703Catalina Sky Survey (CSS) in Arizona, 28 in MPEC 2008-Y50 -- 2008 WZ94, 2008 WQ63, 2008 WN2, 2008 TK157, 2008 SH82, 2008 QT3, 2005 XM4, 2003 YO1, 2003 UX34, 2001 VK5, 2001 OE84, 85236, 65733, 55532, 54071, 39572, 194386, 189973, 142348, 141765, 137799, 136849, 136635, 12923, 11500, 4544, 3360, 1980
A94Cormons Obs. in Italy, 1 in MPEC 2008-Y50 -- 162900
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2008-Y50 -- 2008 XE2, 3122
B60Deep Sky Obs. in Germany, 1 in MPEC 2008-Y50 -- 8567
448Desert Moon Obs. in New Mexico, 10 in MPEC 2008-Y50 -- 2008 XV2, 2008 XP2, 2008 XN, 2008 WN2, 2008 WH60, 2008 UC95, 2008 TE157, 2008 TD27, 2005 SN25, 2001 WT1
J27El Guijo Obs. in Spain, 6 in MPEC 2008-Y50 -- 2008 WQ63, 2005 WS55, 1994 AW1, 200754, 141765, 141052
B23Fiamene Obs. in Italy, 1 in MPEC 2008-Y50 -- 2008 SQ1
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-Y50 -- 6569
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2008-Y50 -- 2008 WQ63, 2008 WL60, 2008 SQ1, 2005 TZ51, 2000 FL1, 4179
J28Jaen Obs. in Spain, 3 in MPEC 2008-Y50 -- 12711, 7358, 1864
704LINEAR in New Mexico, 26 in MPEC 2008-Y50 -- 2008 YF, 2008 WQ63, 2008 UC95, 2008 SH82, 2007 MK13, 2005 XM4, 1994 AW1, 85236, 68372, 54071, 52768, 39572, 36284, 202435, 199801, 198752, 189058, 17511, 152931, 143651, 142348, 141765, 137924, 137805, 7358, 2368
J59Linceo Obs. in Spain, 1 in MPEC 2008-Y50 -- 1627
540Linz Obs. in Austria, 1 in MPEC 2008-Y50 -- 2008 WZ94
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2008-Y50 -- 2368
130Lumezzane Obs. in Italy, 3 in MPEC 2008-Y50 -- 2008 SH82, 2005 XM4, 2002 VY94
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2008-Y50 -- 2008 XB1, 2008 SH82, 2008 QT3, 2005 YS
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-Y50 -- 2008 WK96
B79Marana Obs., 4 in MPEC 2008-Y50 -- 2008 MZ, 199801, 194386, 137805
A06Mataro Obs. in Spain, 2 in MPEC 2008-Y50 -- 2008 WL60, 162900
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2008-Y50 -- 2008 EE, 2007 VL8, 2005 CV25
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2008-Y50 -- 2008 XE3, 2008 WQ63, 2008 EV5
474Mt. John Obs. in New Zealand, 2 in MPEC 2008-Y50 -- 2008 YA, 2003 QM47
G96Mt. Lemmon Survey (MLS) in Arizona, 19 in MPEC 2008-Y50 -- 2008 WZ94, 2008 WH60, 2008 VG14, 2006 OB5, 2005 XM4, 2005 VY17, 2003 YL, 68372, 200840, 19764, 18106, 175114, 153220, 8013, 7358, 6178, 5189, 4486, 2368
A13Naef Obs. in Switzerland, 1 in MPEC 2008-Y50 -- 2008 YL2
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2008-Y50 -- 2008 WQ63, 2008 SQ1, 2008 EV5
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2008-Y50 -- 2008 WQ63, 2008 WL60, 2008 SQ1, 2008 EV5, 2005 TZ51, 2002 VY94
J53Posadas Obs. in Spain, 1 in MPEC 2008-Y50 -- 137805
233San Vito Obs. in Italy, 1 in MPEC 2008-Y50 -- 1994 AW1
204Schiaparelli Obs. in Italy, 2 in MPEC 2008-Y50 -- 2008 EV5, 2005 BC
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPEC 2008-Y50 -- 2008 YQ2, 2006 WY2, 2006 SZ217, 53430, 35107
587Sormano Obs. in Italy, 2 in MPEC 2008-Y50 -- 2008 YP2, 2008 YF
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2008-Y50 -- 96315, 159923, 159368, 5189, 3102, 2368
291Spacewatch 1.8m telescope in Arizona, 28 in MPEC 2008-Y50 -- 2008 XU2, 2008 XO2, 2008 XN, 2008 XM, 2008 XL1, 2008 XK1, 2008 WZ94, 2008 WZ13, 2008 WN2, 2008 WM64, 2008 WK96, 2008 WK32, 2008 WJ96, 2008 WJ60, 2008 WF14, 2008 VA15, 2008 UU1, 2008 SX7, 2006 SU131, 2006 BC10, 2005 SN25, 2005 SB71, 2005 AY28, 2002 EL6, 2002 AC5, 2001 QA143, 2000 AZ93, 1993 VD
A78Stia Obs. in Italy, 8 in MPEC 2008-Y50 -- 2008 XE2, 2008 VK14, 2008 UC, 2008 SH82, 2008 MZ, 20460, 200840, 136923
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 December '08

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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is 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
2008 YJ3NEODyS14162012-20901322.4e-07-3.83-5.160NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2008/12/22.268 to 2008/12/23.475."
2008 XU2JPL Sentry1415203919.3e-08-7.14-7.140JPL: "Analysis based on 31 observations spanning 16.275 days (2008-Dec-06.2616 to 2008-Dec-22.53631)." Diameter approximately 0.026 km. from mean, weighted H=25.5.
NEODyS1415R E M O V E D-
2008 XO2JPL Sentry1415R E M O V E DJPL: Risk listing removed at 0949 UTC.
NEODyS1415R E M O V E D-
2008 WK96JPL Sentry1415R E M O V E DJPL: Risk listing removed at 0953 UTC.
NEODyS1415R E M O V E D-

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 24 December '08

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

1416Grabbed MPEC 2008-Y50 - Daily Orbit Update - see above
1415Noted that JPL Sentry has removed 2008 WK96 as an impact risk - see above
Noted that NEODyS has removed 2008 WK96 as an impact risk - see above
Noted that JPL Sentry has removed 2008 XO2 as an impact risk - see above
Noted that NEODyS has removed 2008 XO2 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 XU2 risk assessment - see above
Noted that NEODyS has removed 2008 XU2 as an impact risk - see above
Noted that NEODyS has posted 2008 YJ3 as an impact risk - see above
0506Grabbed MPEC 2008-Y49 - 2008 JY30 - see above