Contents  on 19 November '11

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 19 November '11

The MPC's NEO Confirmation Page has 6 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six objects listed. Of these, two were "one nighters." So far The Tracking News has counted a total of seventeen listings on the NEOCP 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 19 November '11

Minor Planet Electronic Circulars

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


MPEC 2011-W29 - "20:10 UT" - 2011 WW4


MPEC 2011-W28 - "20:08 UT" - 2011 WV4


MPEC 2011-W27 - "20:07 UT" - 2011 WU4


MPEC 2011-W26 - "16:42 UT" - 2011 WQ4


MPEC 2011-W25 - "16:40 UT" - 2011 WP4


MPEC 2011-W24 - "16:38 UT" - 2011 WO4


<< DOU on 19 Nov. '11 >>  MPEC 2011-W23 - "06:04 UT" - Daily Orbit Update

Observers  on 19 November '11

A total of 27 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPECs 2011-W23, 2011-W24, 2011-W25, 2011-W27 & 2011-W28 -- 2011 WV4, 2011 WU4, 2011 WP4, 2011 WO4, 2011 WC, 2011 WA, 2011 VG9, 2011 UZ275, 2011 UU158, 2011 US63, 2011 UH20, 2011 UC115, 2011 SR69, 2011 SL102, 2011 QD48, 2011 LC19, 2011 GD62, 2009 VO24, 281070
G51Byrne Obs. in southern California, 1 in MPEC 2011-W28 -- 2011 WV4
703Catalina Sky Survey (CSS) in Arizona, 13 in MPECs 2011-W23, 2011-W28 & 2011-W29 -- 2011 WW4, 2011 WV4, 2011 UZ275, 2011 UU106, 2011 QF14, 2011 KF4, 96315, 90075, 16834, 162433, 4183, 3988, 3200
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2011-W23 -- 2011 WL2
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2011-W23 -- 2005 XB1
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2011-W23 -- 2011 WL2
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2011-W27, 2011-W28 & 2011-W29 -- 2011 WW4, 2011 WV4, 2011 WU4
C73Galati Obs. in Romania, 1 in MPEC 2011-W23 -- 3691
J95Great Shefford Obs. in England, 3 in MPECs 2011-W24, 2011-W25 & 2011-W28 -- 2011 WV4, 2011 WP4, 2011 WO4
168Kourovskaya Obs. in Russia, 8 in MPEC 2011-W23 -- 2004 JO2, 302831, 7341, 5143, 3988, 3200, 1036, 433
704LINEAR in New Mexico, 15 in MPECs 2011-W23, 2011-W24 & 2011-W26 -- 2011 WQ4, 2011 WQ2, 2011 WO4, 2011 WL2, 2007 VH186, 2004 JO2, 2001 UE5, 85713, 305090, 302591, 301844, 219071, 190166, 4503, 2201
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 1 in MPEC 2011-W23 -- 2011 UE256
B33Libbiano Obs. in Italy, 1 in MPEC 2011-W27 -- 2011 WU4
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2011-W24 & 2011-W27 -- 2011 WU4, 2011 WO4
B28Mandi Obs. in Italy, 1 in MPEC 2011-W28 -- 2011 WV4
932McCarthy Obs. in Connecticut, 1 in MPEC 2011-W23 -- 2011 WA
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2011-W23, 2011-W25, 2011-W26, 2011-W27 & 2011-W28 -- 2011 WV4, 2011 WU4, 2011 WR2, 2011 WQ4, 2011 WP4, 2011 WD, 1988 TA, 96315, 163070, 138893, 3200
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2011-W23 -- 2011 SL102, 2005 YU55
586Pic du Midi Obs. in France, 6 in MPECs 2011-W23, 2011-W25, 2011-W27, 2011-W28 & 2011-W29 -- 2011 WW4, 2011 WV4, 2011 WU4, 2011 WP4, 2011 UH21, 2008 WZ13
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-W28 -- 2011 WV4
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2011-W24 -- 2011 WO4
204Schiaparelli Obs. in Italy, 8 in MPECs 2011-W23, 2011-W24, 2011-W27 & 2011-W28 -- 2011 WV4, 2011 WU4, 2011 WU2, 2011 WO4, 2011 GH3, 2004 XM130, 2001 XP1, 303262
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2011-W23 -- 2011 UG21, 2005 WS3, 2002 VP85
510Siegen Obs. in Germany, 2 in MPEC 2011-W23 -- 2005 YU55, 1036
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2011-W23, 2011-W24 & 2011-W25 -- 2011 WP4, 2011 WO4, 2011 UH21, 2011 SJ189
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2011-W24, 2011-W25 & 2011-W27 -- 2011 WU4, 2011 WP4, 2011 WO4
B18Terskol Obs. in Russia, 3 in MPECs 2011-W27, 2011-W28 & 2011-W29 -- 2011 WW4, 2011 WV4, 2011 WU4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 November '11

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. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 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
2011 WW4JPL Sentry22062060-208347.7e-10-6.02-6.360JPL: "Analysis based on 22 observations spanning 1.4936 days (2011-Nov-18.30292 to 2011-Nov-19.79654)." Diameter approximately 0.744 km. from mean, weighted H=18.3.
2011 WQ4JPL Sentry1855208113.0e-07-7.65-7.650JPL: "Analysis based on 13 observations spanning .91445 days (2011-Nov-18.27488 to 2011-Nov-19.18933)." Diameter approximately 0.015 km. from mean, weighted H=26.8.
2011 WO4JPL Sentry1855210017.3e-09-4.69-4.690JPL: "Analysis based on 25 observations spanning 1.7416 days (2011-Nov-17.12821 to 2011-Nov-18.86986)." Diameter approximately 0.640 km. from mean, weighted H=18.6.
2011 WU2JPL Sentry1618R E M O V E DJPL #2 for the day: Risk listing removed at 0849 UTC.
2011 WS2NEODyS16212013-20901038.67e-09-3.40-4.370NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2011-11-17.065 to 2011-11-18.773."
JPL Sentry02052018-21111254.2e-08-2.77-3.640JPL: "Analysis based on 24 observations spanning 1.7084 days (2011-Nov-17.06412 to 2011-Nov-18.77251)." Diameter approximately 1.300 km. from mean, weighted H=17.1.
2011 WQ2JPL Sentry16182052-210459.2e-07-6.55-6.640JPL: "Analysis based on 23 observations spanning .93662 days (2011-Nov-17.38138 to 2011-Nov-18.318)." Diameter approximately 0.021 km. from mean, weighted H=26.0.
NEODyS16182052-208931.25e-06-6.39-6.440NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2011-11-17.382 to 2011-11-18.319."
2011 WL2JPL Sentry16182051-2108234.2e-06-3.55-3.740JPL: "Analysis based on 58 observations spanning 1.9999 days (2011-Nov-16.31883 to 2011-Nov-18.31871)." Diameter approximately 0.240 km. from mean, weighted H=20.7.
NEODyS16182060-209072.14e-07-4.69-5.110NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2011-11-16.320 to 2011-11-18.319."
2011 VG9JPL Sentry16182085-2111134.4e-06-3.86-4.150JPL: "Analysis based on 37 observations spanning 2.9098 days (2011-Nov-15.37847 to 2011-Nov-18.288244)." Diameter approximately 0.120 km. from mean, weighted H=22.2.
NEODyS16182085-208633.27e-06-3.98-4.170NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2011-11-15.379 to 2011-11-18.289."
2008 VS4JPL Sentry02052011-21102637.1e-07-4.86-4.970JPL: "Analysis based on 10 observations spanning .08330 days (2008-Nov-07.413 to 2008-Nov-07.4963)." Diameter approximately 0.050 km. from mean, weighted H=24.2.

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 19 November '11

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

2206Noted that JPL Sentry has posted 2011 WW4 as an impact risk - see above
2018Grabbed MPEC 2011-W27 - 2011 WU4 - see above
Grabbed MPEC 2011-W28 - 2011 WV4 - see above
Grabbed MPEC 2011-W29 - 2011 WW4 - see above
1855Noted that JPL Sentry has posted 2011 WO4 as an impact risk - see above
Noted that JPL Sentry has posted 2011 WQ4 as an impact risk - see above
1749Grabbed MPEC 2011-W24 - 2011 WO4 - see above
Grabbed MPEC 2011-W25 - 2011 WP4 - see above
Grabbed MPEC 2011-W26 - 2011 WQ4 - see above
1618Noted that JPL Sentry has updated its 2011 VG9 risk assessment - see above
Noted that NEODyS has updated its 2011 VG9 risk assessment - see above
Noted that JPL Sentry has updated its 2011 WL2 risk assessment - see above
Noted that NEODyS has posted 2011 WL2 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 WQ2 risk assessment - see above
Noted that NEODyS has posted 2011 WQ2 as an impact risk - see above
Noted that NEODyS has posted 2011 WS2 as an impact risk - see above
Noted that JPL Sentry has removed 2011 WU2 as an impact risk - see above
Grabbed MPEC 2011-W23 - Daily Orbit Update - see above
0205Noted that JPL Sentry has updated its 2008 VS4 risk assessment - see above
Noted that JPL Sentry has posted 2011 WS2 as an impact risk - see above
Noted that JPL Sentry has posted 2011 WU2 as an impact risk - see above