Contents  on 22 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.

Radar Astrometry  on 22 December '08

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0058 UTC when the database was dated 21 Dec.

NEOCP Activity  on 22 December '08

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of 29 objects listed on the NEOCP at some point today.

New MPECs  on 22 December '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 20 MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-Y43 - "21:39 UT" - 2008 YG3


MPEC 2008-Y42 - "21:34 UT" - 2008 YF3


MPEC 2008-Y41 - "19:28 UT" - 2008 YE3


MPEC 2008-Y40 - "19:16 UT" - 2008 YD3


MPEC 2008-Y39 - "19:14 UT" - 2008 YC3


MPEC 2008-Y38 - "19:11 UT" - 2008 YB3


MPEC 2008-Y37 - "17:29 UT" - 2008 YR2


MPEC 2008-Y36 - "17:27 UT" - 2008 YQ2


MPEC 2008-Y35 - "17:24 UT" - 2008 YP2


MPEC 2008-Y34 - "17:20 UT" - 2008 YO2


MPEC 2008-Y33 - "17:17 UT" - 2008 YN2


MPEC 2008-Y32 - "17:14 UT" - 2008 YM2


MPEC 2008-Y31 - "17:11 UT" - 2008 YL2


MPEC 2008-Y30 - "17:08 UT" - 2008 YK2


MPEC 2008-Y29 - "17:05 UT" - 2008 YJ2


MPEC 2008-Y28 - "14:18 UT" - 2005 YX128


MPEC 2008-Y27 - "12:26 UT" - 2008 CH116


<< DOU on 22 Dec. '08 >>  MPEC 2008-Y26 - "07:05 UT" - Daily Orbit Update

No observations of objects are reported.


MPEC 2008-Y25 - "03:59 UT" - 2000 BL19


MPEC 2008-Y24 - "03:13 UT" - 2007 TS19

Observers  on 22 December '08

A total of 26 observing facilities appear in today's MPECs.

CodeObserver / observatory
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-Y30 -- 2008 YK2
235CAST Obs. in Italy, 1 in MPEC 2008-Y30 -- 2008 YK2
493Calar Alto Obs. in Spain, 13 in MPECs 2008-Y25, 2008-Y27, 2008-Y28, 2008-Y29, 2008-Y30, 2008-Y31, 2008-Y32, 2008-Y33, 2008-Y35, 2008-Y36, 2008-Y37, 2008-Y42 & 2008-Y43 -- 2008 YR2, 2008 YQ2, 2008 YP2, 2008 YN2, 2008 YM2, 2008 YL2, 2008 YK2, 2008 YJ2, 2008 YG3, 2008 YF3, 2008 CH116, 2005 YX128, 2000 BL19
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2008-Y31, 2008-Y32, 2008-Y33, 2008-Y36, 2008-Y37, 2008-Y39, 2008-Y41 & 2008-Y43 -- 2008 YR2, 2008 YQ2, 2008 YN2, 2008 YM2, 2008 YL2, 2008 YG3, 2008 YE3, 2008 YC3
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2008-Y43 -- 2008 YG3
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-Y30 -- 2008 YK2
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2008 EV5
704LINEAR in New Mexico, 3 in MPECs 2008-Y29, 2008-Y30 & 2008-Y42 -- 2008 YK2, 2008 YJ2, 2008 YF3
J75La Sagra Obs. in Spain, 1 in MPEC 2008-Y30 -- 2008 YK2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2008-Y29, 2008-Y30, 2008-Y31, 2008-Y32, 2008-Y33, 2008-Y34 & 2008-Y36 -- 2008 YQ2, 2008 YO2, 2008 YN2, 2008 YM2, 2008 YL2, 2008 YK2, 2008 YJ2
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-Y24 -- 2007 TS19
900Moriyama Obs. in Japan, 1 in MPEC 2008-Y30 -- 2008 YK2
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-Y28, 2008-Y29, 2008-Y31, 2008-Y32, 2008-Y33, 2008-Y34, 2008-Y35, 2008-Y36, 2008-Y37 & 2008-Y40 -- 2008 YR2, 2008 YQ2, 2008 YP2, 2008 YO2, 2008 YN2, 2008 YM2, 2008 YL2, 2008 YJ2, 2008 YD3, 2005 YX128
A13Naef Obs. in Switzerland, 3 in MPECs 2008-Y39, 2008-Y42 & 2008-Y43 -- 2008 YG3, 2008 YF3, 2008 YC3
A24New Millennium Obs. in Italy, 1 in MPEC 2008-Y29 -- 2008 YJ2
H06%E. Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-Y30 -- 2008 YK2
473Remanzacco Obs. in Italy, 3 in MPECs 2008-Y29, 2008-Y30 & 2008-Y36 -- 2008 YQ2, 2008 YK2, 2008 YJ2
854Sabino Canyon Obs. in Arizona, 5 in MPECs 2008-Y29, 2008-Y30, 2008-Y31, 2008-Y36 & 2008-Y42 -- 2008 YQ2, 2008 YL2, 2008 YK2, 2008 YJ2, 2008 YF3
H36Sandlot Obs. in Kansas, 5 in MPECs 2008-Y29, 2008-Y31, 2008-Y32, 2008-Y33 & 2008-Y35 -- 2008 YP2, 2008 YN2, 2008 YM2, 2008 YL2, 2008 YJ2
204Schiaparelli Obs. in Italy, 6 in MPECs 2008-Y29, 2008-Y30, 2008-Y31, 2008-Y32, 2008-Y33 & 2008-Y36 -- 2008 YQ2, 2008 YN2, 2008 YM2, 2008 YL2, 2008 YK2, 2008 YJ2
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-Y38 -- 2008 YB3
587Sormano Obs. in Italy, 3 in MPECs 2008-Y29, 2008-Y30 & 2008-Y31 -- 2008 YL2, 2008 YK2, 2008 YJ2
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2008-Y28, 2008-Y29 & 2008-Y35 -- 2008 YP2, 2008 YJ2, 2005 YX128
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-Y29 -- 2008 YJ2
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2008-Y41 -- 2008 YE3
648Winer Obs. in Arizona, 2 in MPECs 2008-Y29 & 2008-Y30 -- 2008 YK2, 2008 YJ2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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 YD3JPL Sentry22582012-2104214.3e-08-7.82-8.250JPL: "Analysis based on 12 observations spanning .14315 days (2008-Dec-22.34245 to 2008-Dec-22.4856)." Diameter approximately 0.020 km. from mean, weighted H=26.2.
2008 YC3JPL Sentry22012045-21062563.0e-05-5.08-6.000JPL: "Analysis based on 12 observations spanning .50384 days (2008-Dec-22.25277 to 2008-Dec-22.75661)." Diameter approximately 0.028 km. from mean, weighted H=25.4.
2008 YO2JPL Sentry19342052-2107466.6e-06-5.32-5.880JPL: "Analysis based on 25 observations spanning 1.0020 days (2008-Dec-21.16512 to 2008-Dec-22.16708)." Diameter approximately 0.031 km. from mean, weighted H=25.2.
2008 YN2JPL Sentry1934208411.2e-10-10.84-10.80JPL: "Analysis based on 32 observations spanning 1.0745 days (2008-Dec-21.14374 to 2008-Dec-22.21827)." Diameter approximately 0.019 km. from mean, weighted H=26.3.

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 22 December '08

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

2258Noted that JPL Sentry has posted 2008 YD3 as an impact risk - see above
2201Noted that JPL Sentry has posted 2008 YC3 as an impact risk - see above
Grabbed MPEC 2008-Y42 - 2008 YF3 - see above
Grabbed MPEC 2008-Y43 - 2008 YG3 - see above
1935Grabbed MPEC 2008-Y38 - 2008 YB3 - see above
Grabbed MPEC 2008-Y39 - 2008 YC3 - see above
Grabbed MPEC 2008-Y40 - 2008 YD3 - see above
Grabbed MPEC 2008-Y41 - 2008 YE3 - see above
1934Noted that JPL Sentry has posted 2008 YN2 as an impact risk - see above
Noted that JPL Sentry has posted 2008 YO2 as an impact risk - see above
1758Grabbed MPEC 2008-Y30 - 2008 YK2 - see above
Grabbed MPEC 2008-Y31 - 2008 YL2 - see above
Grabbed MPEC 2008-Y32 - 2008 YM2 - see above
Grabbed MPEC 2008-Y33 - 2008 YN2 - see above
Grabbed MPEC 2008-Y34 - 2008 YO2 - see above
Grabbed MPEC 2008-Y35 - 2008 YP2 - see above
Grabbed MPEC 2008-Y36 - 2008 YQ2 - see above
Grabbed MPEC 2008-Y37 - 2008 YR2 - see above
1728Grabbed MPEC 2008-Y29 - 2008 YJ2 - see above
1457Grabbed MPEC 2008-Y26 - Daily Orbit Update - see above
Grabbed MPEC 2008-Y27 - 2008 CH116 - see above
Grabbed MPEC 2008-Y28 - 2005 YX128 - see above
0559Grabbed MPEC 2008-Y24 - 2007 TS19 - see above
Grabbed MPEC 2008-Y25 - 2000 BL19 - see above
0058Noted Radar Astrometry database update - see above