Contents  on 3 January '09

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 3 January '09

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these 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 3 January '09

Minor Planet Electronic Circulars

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


MPEC 2009-A29 - "16:05 UT" - 2008 WQ63


MPEC 2009-A28 - "15:47 UT" - 1993 VC


MPEC 2009-A27 - "15:04 UT" - 2009 AV


MPEC 2009-A26 - "15:01 UT" - 2009 AU


MPEC 2009-A25 - "14:58 UT" - 2009 AT


MPEC 2009-A24 - "14:50 UT" - 2009 AS


MPEC 2009-A23 - "13:15 UT" - 2008 RE80


<< DOU on 3 Jan. '09 >>  MPEC 2009-A22 - "07:09 UT" - Daily Orbit Update


MPEC 2009-A21 - "05:02 UT" - 2008 QY40


MPEC 2009-A20 - "00:17 UT" - 2006 VA3

Observers  on 3 January '09

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPECs 2009-A22 & 2009-A25 -- 2009 AT, 2008 YA29
J51Atlante Obs. in the Canary Islands, 3 in MPEC 2009-A22 -- 2008 EV5, 162900, 141052
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2009-A22 & 2009-A25 -- 2009 AT, 2008 YK2, 162385
807Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2009-A21 -- 2008 QY40
448Desert Moon Obs. in New Mexico, 5 in MPECs 2009-A22 & 2009-A25 -- 2009 AT, 2008 YS27, 2008 YR2, 2008 YG26, 153953
J95Great Shefford Obs. in England, 12 in MPECs 2009-A22, 2009-A25, 2009-A26 & 2009-A27 -- 2009 AV, 2009 AU, 2009 AT, 2008 YY32, 2008 YV32, 2008 YS27, 2008 YH30, 2008 YG30, 2008 YF29, 2008 YE30, 2008 YB29, 2008 UL90
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2009-A22 -- 2008 YK2, 2008 WL60, 2008 SH82, 2008 EV5, 2005 BC, 2004 LV3
B15Inastars Obs. in Germany, 1 in MPEC 2009-A22 -- 2009 AK
130Lumezzane Obs. in Italy, 12 in MPEC 2009-A22 -- 2008 YO27, 2008 YN27, 2008 YG26, 2008 XE3, 2008 LW8, 2005 YS, 2004 LV3, 2002 AU4, 53319, 202435, 154715, 141052
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2009-A22, 2009-A25 & 2009-A26 -- 2009 AU, 2009 AT, 2009 AL, 2008 YU32, 2008 YC3
213Montcabre Obs. in Spain, 1 in MPEC 2009-A22 -- 2008 EV5
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2009-A22, 2009-A24, 2009-A26, 2009-A27 & 2009-A28 -- 2009 AV, 2009 AU, 2009 AS, 2007 YZ, 2003 XB22, 1993 VC, 96315, 159923
675Mt. Palomar in southern California, 1 in MPEC 2009-A21 -- 2008 QY40
J93Mt. Tuffley Obs. in England, 6 in MPEC 2009-A22 -- 89355, 162900, 136849, 12711, 4179, 1627
644NEAT's Mt. Palomar telescope in southern California, 2 in MPECs 2009-A23 & 2009-A29 -- 2008 WQ63, 2008 RE80
J47Nazaret Obs. in Spain, 1 in MPEC 2009-A22 -- 2008 EV5
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 13 in MPEC 2009-A22 -- 2008 YN27, 2008 YK2, 2008 YG26, 2008 XV2, 2008 XE3, 2008 XE2, 2008 SQ1, 2008 SH82, 2008 RT26, 2008 EV5, 2007 UY1, 2002 VY94, 2001 FX9
J52Pinsoro Obs. in Spain, 1 in MPEC 2009-A22 -- 2008 EV5
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-A25 -- 2009 AT
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2009-A20 & 2009-A22 -- 2008 YA, 2006 VA3
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2009-A22 & 2009-A24 -- 2009 AS, 2009 AO, 2009 AL, 2008 YV32, 2008 YU30, 2008 YT30, 2008 YM2, 2008 YJ3, 2008 YF30, 2008 YF29, 2008 YE29, 2008 YD29, 2008 XO2, 2003 NO4
611Starkenburg Obs. in Germany, 1 in MPEC 2009-A22 -- 2008 YG29
H53Thompsonville Obs. in Illinois, 5 in MPEC 2009-A22 -- 2008 SH82, 89355, 35107, 162900, 8567
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 January '09

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
2009 AVJPL Sentry18592010-21062091.1e-07-2.45-2.590JPL: "Analysis based on 10 observations spanning .99743 days (2009-Jan-02.54066 to 2009-Jan-03.53809)." Diameter approximately 0.905 km. from mean, weighted H=17.9.
2009 ALJPL Sentry15562049-210684.8e-07-4.81-5.080JPL: "Analysis based on 25 observations spanning 1.8705 days (2009-Jan-01.29931 to 2009-Jan-03.16982)." Diameter approximately 0.160 km. from mean, weighted H=21.6.
NEODyS15562053-205721.63e-07-5.05-5.050NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/01/01.300 to 2009/01/03.171."
2008 YY32JPL Sentry1556207912.6e-10-9.89-9.890JPL: "Analysis based on 40 observations spanning 2.6466 days (2008-Dec-31.42442 to 2009-Jan-03.071047)." Diameter approximately 0.030 km. from mean, weighted H=25.2.
2008 YV32JPL Sentry15562085-2107107.0e-06-6.06-6.650JPL: "Analysis based on 30 observations spanning 2.9281 days (2008-Dec-31.22029 to 2009-Jan-03.14842)." Diameter approximately 0.019 km. from mean, weighted H=26.2.
NEODyS15562072-209051.47e-06-6.68-6.960NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2008/12/31.221 to 2009/01/03.149."
2008 YU32JPL Sentry15562013-2103574.2e-07-3.26-3.700JPL: "Analysis based on 19 observations spanning 3.0513 days (2008-Dec-31.10188 to 2009-Jan-03.15316)." Diameter approximately 0.373 km. from mean, weighted H=19.8.
NEODyS15562013-2088482.56e-07-3.37-3.790NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2008/12/31.103 to 2009/01/03.154."
2008 YU30JPL Sentry1556R E M O V E DJPL: Risk listing removed at 1138 UTC.
NEODyS1556R E M O V E D-
2008 YT30JPL Sentry1556201511.3e-10-6.42-6.420JPL: "Analysis based on 30 observations spanning 3.0071 days (2008-Dec-31.09054 to 2009-Jan-03.09763)." Diameter approximately 0.430 km. from mean, weighted H=19.5.
NEODyS1556R E M O V E D-
2008 YF29JPL Sentry15562032-210221.7e-09-8.28-8.350JPL: "Analysis based on 36 observations spanning 3.6683 days (2008-Dec-30.24924 to 2009-Jan-02.91757)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
NEODyS15562028-205927.89e-09-7.40-7.460NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2008/12/30.250 to 2009/01/02.918."
2008 YE29JPL Sentry1556R E M O V E DJPL: Risk listing removed at 1129 UTC.
NEODyS1556R E M O V E D-
2008 YC3JPL Sentry15562088-2107192.0e-04-4.32-4.870JPL: "Analysis based on 29 observations spanning 11.879 days (2008-Dec-22.25277 to 2009-Jan-03.13185)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
NEODyS15562084-2090116.31e-05-4.79-5.220NEODyS: "Based on 33 optical observations (of which 4 are rejected as outliers) from 2008/12/22.254 to 2009/01/03.133."

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 3 January '09

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

1859Noted that JPL Sentry has posted 2009 AV as an impact risk - see above
1638Grabbed MPEC 2009-A29 - 2008 WQ63 - see above
1556Noted that JPL Sentry has updated its 2008 YC3 risk assessment - see above
Noted that NEODyS has updated its 2008 YC3 risk assessment - see above
Noted that JPL Sentry has removed 2008 YE29 as an impact risk - see above
Noted that NEODyS has removed 2008 YE29 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 YF29 risk assessment - see above
Noted that NEODyS has updated its 2008 YF29 risk assessment - see above
Noted that JPL Sentry has updated its 2008 YT30 risk assessment - see above
Noted that NEODyS has removed 2008 YT30 as an impact risk - see above
Noted that JPL Sentry has removed 2008 YU30 as an impact risk - see above
Noted that NEODyS has removed 2008 YU30 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 YU32 risk assessment - see above
Noted that NEODyS has posted 2008 YU32 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 YV32 risk assessment - see above
Noted that NEODyS has posted 2008 YV32 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 YY32 risk assessment - see above
Noted that JPL Sentry has updated its 2009 AL risk assessment - see above
Noted that NEODyS has posted 2009 AL as an impact risk - see above
Grabbed MPEC 2009-A22 - Daily Orbit Update - see above
Grabbed MPEC 2009-A23 - 2008 RE80 - see above
Grabbed MPEC 2009-A24 - 2009 AS - see above
Grabbed MPEC 2009-A25 - 2009 AT - see above
Grabbed MPEC 2009-A26 - 2009 AU - see above
Grabbed MPEC 2009-A27 - 2009 AV - see above
Grabbed MPEC 2009-A28 - 1993 VC - see above
0614Grabbed MPEC 2009-A21 - 2008 QY40 - see above
0020Grabbed MPEC 2009-A20 - 2006 VA3 - see above