Contents  on 29 October '11

Note: These A/CC news pages will update more irregularly and less frequently than usual through Sunday, October 30th.

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 29 October '11

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2340 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 24 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 29 October '11

Minor Planet Electronic Circulars

As of last check at 2341 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-U100 - "20:49 UT" - Observations and Orbits of Comets


MPEC 2011-U99 - "11:19 UT" - 2011 UC190


MPEC 2011-U98 - "11:17 UT" - 2011 UB190


<< DOU on 29 Oct. '11 >>  MPEC 2011-U97 - "06:04 UT" - Daily Orbit Update

Observers  on 29 October '11

A total of 59 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2011-U97 & 2011-U99 -- 2011 UC190, 2008 SX245, 2008 GE1
565Bassano Bresciano Obs. in Italy, 1 in MPEC 2011-U100 -- 78P
B59Borken Obs. in Germany, 1 in MPEC 2011-U100 -- 78P
B96Brixiis Obs. in Belgium, 11 in MPEC 2011-U100 -- C/2011 F1, C/2010 S1, P/2010 JC81, C/2010 G2, C/2009 P1, C/2008 S3, C/2008 FK75, 213P, 131P, 78P, 45P
215Buchloe Obs. in Germany, 9 in MPEC 2011-U100 -- P/2011 P1, C/2011 L3, C/2010 U3, P/2010 TO20, C/2006 S3, 213P, 115P, 78P, 65P
B53Casal Lumbroso Obs. in Italy, 2 in MPEC 2011-U100 -- C/2009 P1, C/2008 FK75
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2011-U97, 2011-U99 & 2011-U100 -- 2011 UC190, P/2011 R3, 2011 QE38, P/2010 T1, 88188, 26760, 162186, 154302, 137799, 4503, 3554, 2212, 1943, 215P
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2011-U100 -- P/2011 R3
B50Corner Obs. in Germany, 1 in MPEC 2011-U100 -- C/2009 P1
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2011-U98 -- 2011 UB190
C74El Teatrillo de Lyra Obs. in Spain, 1 in MPEC 2011-U100 -- 78P
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2011-U99 -- 2011 UC190
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-U100 -- C/2010 G2
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2011-U100 -- 171P
762Four Winds Obs. in Michigan, 1 in MPEC 2011-U100 -- C/2009 P1
C18Frasnes-Lez-Anvaing Obs. in Belgium, 2 in MPEC 2011-U100 -- C/2010 S1, C/2010 G2
C73Galati Obs. in Romania, 1 in MPEC 2011-U97 -- 20086
372Geisei Obs. in Japan, 4 in MPEC 2011-U100 -- P/2011 R2, C/2011 R1, P/2011 Q3, C/2008 S3
B83Gieres Obs. in France, 2 in MPEC 2011-U100 -- 213P, 78P
E16Grove Creek Obs. in New South Wales, 2 in MPEC 2011-U100 -- 78P, 48P
379Hamamatsu-Yuto Obs. in Japan, 9 in MPECs 2011-U97 & 2011-U100 -- 2011 TN9, 2011 SR69, C/2009 P1, 2004 QJ7, 2004 JO2, 1990 UA, 219071, 163081, 213P
D88Hiratsuka Obs. in Japan, 4 in MPEC 2011-U100 -- P/2011 R2, C/2008 S3, C/2008 FK75, 130P
750Hobbs Obs. in Wisconsin, 1 in MPEC 2011-U100 -- C/2009 P1
C32Ka-Dar Obs. TAU Station in Russia, 2 in MPEC 2011-U100 -- P/2011 R3, 163P
352Konan Obs. in Japan, 3 in MPEC 2011-U100 -- 131P, 78P, 65P
D95Kurihara Obs. in Japan, 10 in MPEC 2011-U100 -- C/2011 S2, P/2011 R2, C/2011 G1, C/2010 S1, C/2009 P1, C/2008 S3, 213P, 78P, 45P, 21P
704LINEAR in New Mexico, 19 in MPECs 2011-U97, 2011-U99 & 2011-U100 -- 2011 UJ169, 2011 UC190, P/2011 R3, C/2011 R1, 2011 OQ5, 96590, 90075, 85628, 162433, 152942, 138524, 2368, 2212, 1943, 78P, 65P, 49P, 48P, 36P
J38La Vara Obs. in Spain, 8 in MPEC 2011-U100 -- C/2010 G2, C/2009 P1, C/2008 FK75, 244P, 213P, 131P, 130P, 78P
844Los Molinos Obs. in Uruguay, 1 in MPEC 2011-U97 -- 2011 TN9
B82Maidbronn Obs. in Germany, 2 in MPEC 2011-U100 -- C/2011 U2, C/2009 P1
C10Maisoncelles Obs. in France, 11 in MPEC 2011-U100 -- P/2011 R3, P/2011 Q3, P/2011 P1, C/2010 G2, C/2009 P1, 176P, 131P, 97P, 45P, 36P, 29P
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-U98 -- 2011 UB190
932McCarthy Obs. in Connecticut, 1 in MPEC 2011-U97 -- 2011 UL21
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2011-U97 -- 2008 UX, 2001 UE5
945Monte Deva Obs. in Spain, 4 in MPEC 2011-U100 -- C/2010 S1, C/2010 G2, C/2009 P1, 78P
900Moriyama Obs. in Japan, 3 in MPEC 2011-U100 -- C/2011 R1, C/2009 P1, 242P
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2011-U97 & 2011-U100 -- 2011 UD64, P/2011 R3, C/2011 C1, 2007 VR183, 2005 VQ, 2002 YB12, 65679, 170502, 137126
J93Mt. Tuffley Obs. in England, 5 in MPEC 2011-U97 -- 163081, 7341, 3988, 1036, 433
E07Murrumbateman Obs. in New South Wales, 2 in MPEC 2011-U100 -- P/2011 Q3, P/2011 N1
C47Nonndorf Obs. in Austria, 4 in MPEC 2011-U100 -- C/2010 S1, C/2008 S3, C/2008 FK75, 213P
C23Olmen Obs. in Belgium, 11 in MPEC 2011-U100 -- C/2010 S1, C/2010 G2, C/2009 P1, C/2008 S3, C/2006 S3, 213P, 78P, 65P, 49P, 36P, 21P
C72Palestrina Obs. in Italy, 1 in MPEC 2011-U100 -- C/2009 P1
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2011-U98 & 2011-U100 -- 2011 UB190, P/2011 R3, 215P, 163P, 65P, 48P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2011-U100 -- P/2011 R3, 65P
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 8 in MPEC 2011-U100 -- C/2011 S2, C/2011 Q1, C/2011 G1, C/2011 A3, P/2010 TO20, 48P, 45P, 21P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-U100 -- 78P
233San Vito Obs. in Italy, 3 in MPEC 2011-U100 -- C/2008 FK75, 213P, 78P
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-U99 -- 2011 UC190
C71Sant Marti Sesgueioles Obs. in Spain, 4 in MPEC 2011-U100 -- C/2008 S3, 176P, 164P, 65P
204Schiaparelli Obs. in Italy, 2 in MPECs 2011-U98 & 2011-U99 -- 2011 UC190, 2011 UB190
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2011-U97 -- 2011 UU63, 2011 SF3
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2011-U97 -- 2011 OQ5, 2008 QT3, 154302
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2011-U97 -- 2011 UU106, 2011 UT20, 2011 UF21, 2011 UA131, 2011 TC4, 2011 SE108, 2011 SD173
A98Taurus-1 Obs. in Belarus, 4 in MPEC 2011-U100 -- P/2011 R3, C/2010 S1, C/2010 G2, 65P
B18Terskol Obs. in Russia, 2 in MPECs 2011-U97 & 2011-U99 -- 2011 UJ169, 2011 UC190
B51Vallauris Obs. in France, 4 in MPEC 2011-U100 -- P/2011 R3, P/2011 R2, C/2009 P1, 213P
H47Vicksburg Obs. in Mississippi, 8 in MPEC 2011-U100 -- C/2011 R1, C/2010 G2, C/2010 FB87, 244P, 242P, 213P, 78P, 49P
B42Vitebsk Obs. in Belarus, 3 in MPEC 2011-U100 -- C/2010 S1, C/2008 FK75, 244P
I45W Crucis Obs. in Argentina, 1 in MPEC 2011-U97 -- 2011 TN9
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 October '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2341 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 UM169NEODyS16182080-209052.52e-06-5.59-5.630NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2011-10-27.376 to 2011-10-28.278."
2011 UL169NEODyS16182057-206661.16e-05-6.56-6.610NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2011-10-27.293 to 2011-10-28.271."
2011 UG169NEODyS16182018-2090133.82e-09-8.26-8.630NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2011-10-24.431 to 2011-10-25.291."
2011 UA131JPL Sentry1618R E M O V E DJPL: Risk listing removed at 0849 UTC.
NEODyS1618R E M O V E D-
2011 UL21NEODyS16182032-2075203.83e-07-1.48-2.020NEODyS: "Based on 79 optical observations (of which 0 are rejected as outliers) from 2011-10-17.483 to 2011-10-28.418."
2011 SD173NEODyS1618R 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 29 October '11

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

2304Grabbed MPEC 2011-U100 - Observations and Orbits of Comets - see above
1618Noted that NEODyS has removed 2011 SD173 as an impact risk - see above
Noted that JPL Sentry has removed 2011 UA131 as an impact risk - see above
Noted that NEODyS has removed 2011 UA131 as an impact risk - see above
Noted that NEODyS has posted 2011 UG169 as an impact risk - see above
Noted that NEODyS has posted 2011 UL169 as an impact risk - see above
Noted that NEODyS has updated its 2011 UL21 risk assessment - see above
Noted that NEODyS has posted 2011 UM169 as an impact risk - see above
Grabbed MPEC 2011-U97 - Daily Orbit Update - see above
Grabbed MPEC 2011-U98 - 2011 UB190 - see above
Grabbed MPEC 2011-U99 - 2011 UC190 - see above