Contents  on 21 November '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 21 November '09

The MPC's NEO Confirmation Page has 11 listings: 4 new, 7 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and seven updated listings. Of these, eight were "one nighters." So far The Tracking News has counted a total of 20 listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 21 November '09

Minor Planet Electronic Circulars

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


MPEC 2009-W62 - "13:37 UT" - 2009 WD11


MPEC 2009-W61 - "13:35 UT" - 2009 WC11


MPEC 2009-W60 - "13:31 UT" - 2009 WB11


MPEC 2009-W59 - "13:18 UT" - 2002 WX12


<< DOU on 21 Nov. '09 >>  MPEC 2009-W58 - "07:11 UT" - Daily Orbit Update

Observers  on 21 November '09

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

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 2 in MPECs 2009-W61 & 2009-W62 -- 2009 WD11, 2009 WC11
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 5 in MPECs 2009-W58 & 2009-W60 -- 2009 WZ7, 2009 WX7, 2009 WJ6, 2009 WB11, 1998 HJ3
160Castelmartini Obs. in Italy, 7 in MPEC 2009-W58 -- 2009 VW, 2009 UK28, 2009 SM103, 20790, 17274, 162998, 143678
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2009-W58 -- 66272, 217807, 16834, 154631, 3553, 3200
448Desert Moon Obs. in New Mexico, 5 in MPEC 2009-W58 -- 2009 WL1, 2009 VO24, 2009 US87, 2009 UK, 2006 WR1
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-W58 -- 2009 WL1
J95Great Shefford Obs. in England, 1 in MPEC 2009-W58 -- 2009 WY7
J28Jaen Obs. in Spain, 2 in MPEC 2009-W58 -- 2009 RN, 2009 MX6
704LINEAR in New Mexico, 17 in MPEC 2009-W58 -- 2009 WY7, 2009 WN8, 2009 WB, 2009 UV18, 2009 KK8, 2007 UR3, 2003 WR21, 1999 YC, 1998 HJ3, 35396, 217683, 215188, 17274, 16834, 162273, 136617, 5653
J75La Sagra Obs. in Spain, 3 in MPEC 2009-W58 -- 99248, 216689, 152560
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2009-W58, 2009-W59, 2009-W60, 2009-W61 & 2009-W62 -- 2009 WY7, 2009 WR6, 2009 WD7, 2009 WD11, 2009 WC11, 2009 WB11, 2009 VA26, 2002 WX12
932McCarthy Obs. in Connecticut, 2 in MPEC 2009-W58 -- 2009 WY7, 2009 WX6
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-W58 & 2009-W59 -- 2009 VT, 2009 VS44, 2002 WX12, 2002 VT85, 38091, 163295, 1863
J93Mt. Tuffley Obs. in England, 2 in MPEC 2009-W58 -- 217807, 433
J47Nazaret Obs. in Spain, 1 in MPEC 2009-W58 -- 4015
233San Vito Obs. in Italy, 1 in MPEC 2009-W58 -- 2002 NW16
H36Sandlot Obs. in Kansas, 4 in MPECs 2009-W59, 2009-W60, 2009-W61 & 2009-W62 -- 2009 WD11, 2009 WC11, 2009 WB11, 2002 WX12
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2009-W58, 2009-W60, 2009-W61 & 2009-W62 -- 2009 WD11, 2009 WC11, 2009 WB11, 2002 AT15, 2000 WS67, 21088
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2009-W58, 2009-W59, 2009-W60, 2009-W61 & 2009-W62 -- 2009 WR6, 2009 WM1, 2009 WJ1, 2009 WD11, 2009 WC11, 2009 WB11, 2009 VS44, 2009 VN1, 2009 TL8, 2009 SL104, 2005 EZ29, 2004 XK4, 2002 WX12, 2001 YU3
926Tenagra II Obs. in Arizona, 3 in MPECs 2009-W58 & 2009-W62 -- 2009 WX6, 2009 WD11, 2009 WB
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-W58 -- 1998 HJ3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 November '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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
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 WY7JPL Sentry1639R E M O V E DJPL: Risk listing removed at 1301 UTC.
2009 WW7NEODyS16402042-2090181.32e-05-7.01-7.120NEODyS: "Based on 26 optical observations (of which 1 are rejected as outliers) from 2009/11/19.239 to 2009/11/20.373."
2009 WD7JPL Sentry1639R E M O V E DJPL: Risk listing removed at 1052 UTC.
2009 WR6NEODyS1639R E M O V E D-
JPL Sentry1639R E M O V E DJPL: Risk listing removed at 1049 UTC.
2009 WJ6JPL Sentry16392049-205624.1e-08-8.37-8.390JPL: "Analysis based on 54 observations spanning 1.0263 days (2009-Nov-19.26657 to 2009-Nov-20.292876)." Diameter approximately 0.010 km. from mean, weighted H=27.6.
NEODyS1639R E M O V E D-
2009 WM1NEODyS16402018-2090702.25e-05-2.04-2.460NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2009/11/17.465 to 2009/11/20.482."
JPL Sentry16392018-2107943.0e-05-1.99-2.470JPL: "Analysis based on 30 observations spanning 3.0170 days (2009-Nov-17.4641 to 2009-Nov-20.48107)." Diameter approximately 0.272 km. from mean, weighted H=20.5.
2009 WJ1NEODyS16402057-208024.83e-09-6.37-6.450NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2009/11/17.110 to 2009/11/21.076."
JPL Sentry16392080-210741.3e-08-6.11-6.530JPL: "Analysis based on 31 observations spanning 3.9665 days (2009-Nov-17.10881 to 2009-Nov-21.07531)." Diameter approximately 0.214 km. from mean, weighted H=21.0.
2009 VA26JPL Sentry1639R E M O V E DJPL: Risk listing removed at 1051 UTC.
2009 VZ25NEODyS1639R 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 21 November '09

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

1640Noted that NEODyS has updated its 2009 WJ1 risk assessment - see above
Noted that NEODyS has updated its 2009 WM1 risk assessment - see above
Grabbed MPEC 2009-W58 - Daily Orbit Update - see above
Grabbed MPEC 2009-W59 - 2002 WX12 - see above
Grabbed MPEC 2009-W60 - 2009 WB11 - see above
Grabbed MPEC 2009-W61 - 2009 WC11 - see above
1639Noted that JPL Sentry has removed 2009 VA26 as an impact risk - see above
Noted that NEODyS has removed 2009 VZ25 as an impact risk - see above
Noted that JPL Sentry has removed 2009 WD7 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 WJ1 risk assessment - see above
Noted that JPL Sentry has updated its 2009 WJ6 risk assessment - see above
Noted that NEODyS has removed 2009 WJ6 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 WM1 risk assessment - see above
Noted that JPL Sentry has removed 2009 WR6 as an impact risk - see above
Noted that NEODyS has removed 2009 WR6 as an impact risk - see above
Noted that NEODyS has posted 2009 WW7 as an impact risk - see above
Noted that JPL Sentry has removed 2009 WY7 as an impact risk - see above
Grabbed MPEC 2009-W62 - 2009 WD11 - see above