Contents  on 26 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 26 November '09

The MPC's NEO Confirmation Page has 17 listings: 4 new, 13 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and thirteen updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of 25 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 26 November '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 26 Nov. '09 >>  MPEC 2009-W118 - "07:13 UT" - Daily Orbit Update


MPEC 2009-W117 - "00:21 UT" - 2009 WN105

Observers  on 26 November '09

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2009-W118 -- 2009 WN25
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-W118 -- 2009 WN25
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-W118 -- 2009 WZ104
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2009-W118 -- 2009 WY51, 222073, 218863, 185716, 163899, 138883, 137062, 5751, 5646
448Desert Moon Obs. in New Mexico, 4 in MPEC 2009-W118 -- 2009 WY51, 2009 WV25, 2009 WF, 2009 US87
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2009-W118 -- 2009 WV25, 2009 WR25
J95Great Shefford Obs. in England, 2 in MPECs 2009-W117 & 2009-W118 -- 2009 WQ52, 2009 WN105
442Gualba Obs. in Spain, 1 in MPEC 2009-W118 -- 4015
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2009-W118 -- 2009 UV18, 2009 RN, 2009 NA, 2006 UR, 2005 RQ6
682Kanab Obs. in Utah, 1 in MPEC 2009-W118 -- 2009 WH104
704LINEAR in New Mexico, 7 in MPEC 2009-W118 -- 2009 WF, 2009 WB105, 2009 WA105, 2005 MC, 2004 VA15, 217807, 154631
J75La Sagra Obs. in Spain, 1 in MPEC 2009-W118 -- 5131
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPEC 2009-W118 -- 2009 WV25, 2009 WD52, 2009 VR44, 2009 BP58, 22771, 217683, 162273, 3288
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-W118 -- 2009 WV25, 2009 WF, 2009 UV18, 2005 RQ6, 2004 XJ3
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-W118 -- 2009 WV25
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2009-W118 -- 2009 VZ, 1998 VF32, 96590, 202683
071Smolyan Obs. in Bulgaria, 1 in MPEC 2009-W118 -- 1627
691Spacewatch 0.9m telescope in Arizona, 24 in MPEC 2009-W118 -- 2009 WT25, 2009 WD7, 2009 WD11, 2009 WB, 2009 VW, 2009 VR44, 2009 US87, 2009 QH2, 2009 KK, 2007 UR3, 2006 XA, 2006 WN1, 2003 UX34, 2002 VT85, 2001 WT1, 2001 SG286, 2001 RE8, 2001 HA8, 1990 UA, 89136, 152895, 143404, 138852, 5653
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2009-W117 & 2009-W118 -- 2009 WR52, 2009 WN105, 2009 WM1, 2009 WC11, 2009 VQ44, 2009 TE10, 2009 SM, 2009 SG2, 2009 RD1, 2006 VG13, 1996 XB27, 1995 SA
926Tenagra II Obs. in Arizona, 1 in MPEC 2009-W118 -- 2009 WA54
A92Urseanu Obs. in Romania, 1 in MPEC 2009-W118 -- 217807
I15Wishing Star Obs. in Rhode Island, 1 in MPEC 2009-W118 -- 162273
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 November '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 WA105JPL Sentry16062096-210321.7e-09-8.56-8.630JPL: "Analysis based on 20 observations spanning .23898 days (2009-Nov-25.15421 to 2009-Nov-25.39319)." Diameter approximately 0.057 km. from mean, weighted H=23.9.
2009 WR52JPL Sentry16062031-2109831.0e-04-5.80-5.980JPL: "Analysis based on 20 observations spanning 2.9127 days (2009-Nov-23.21917 to 2009-Nov-26.13188)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
NEODyS16062031-2090467.8e-05-5.88-6.020NEODyS: "Based on 21 optical observations (of which 1 are rejected as outliers) from 2009/11/23.220 to 2009/11/26.137."
2009 WQ52JPL Sentry1606203713.7e-07-7.61-7.610JPL: "Analysis based on 21 observations spanning 2.6368 days (2009-Nov-23.19879 to 2009-Nov-25.835553)." Diameter approximately 0.008 km. from mean, weighted H=28.2.
NEODyS1606R E M O V E D-
2009 WN25JPL Sentry1606R E M O V E DJPL: Risk listing removed at 0951 UTC.
2009 WM1NEODyS16062018-20901573.15e-04-0.70-0.961NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2009/11/17.465 to 2009/11/25.488. NOTE: The Virtual Impactors in 2018/11/22.956 and 2027/11/23.216 ... are rated as Torino Scale 1."

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 26 November '09

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

1606Noted that JPL Sentry has posted 2009 WA105 as an impact risk - see above
Noted that NEODyS has updated its 2009 WM1 risk assessment - see above
Noted that JPL Sentry has removed 2009 WN25 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 WQ52 risk assessment - see above
Noted that NEODyS has removed 2009 WQ52 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 WR52 risk assessment - see above
Noted that NEODyS has updated its 2009 WR52 risk assessment - see above
Grabbed MPEC 2009-W118 - Daily Orbit Update - see above
0027Grabbed MPEC 2009-W117 - 2009 WN105 - see above