Contents  on 21 October '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.

Radar Astrometry  on 21 October '11

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0102 UTC when the database was dated 20 Oct.

NEOCP Activity  on 21 October '11

The MPC's NEO Confirmation Page has 28 listings

When last checked at 2350 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 28 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 49 listings on the NEOCP today.

New MPECs  on 21 October '11

Minor Planet Electronic Circulars

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


MPEC 2011-U42 - "16:51 UT" - Observations and Orbits of Comets


MPEC 2011-U41 - "13:46 UT" - Comet P/2010 TO20 (LINEAR-Grauer)


MPEC 2011-U40 - "13:35 UT" - 2011 UJ21


MPEC 2011-U39 - "13:02 UT" - 2011 UL21


MPEC 2011-U38 - "13:01 UT" - 2011 UK21


MPEC 2011-U37 - "11:04 UT" - 2011 UH21


MPEC 2011-U36 - "11:02 UT" - 2011 UG21


MPEC 2011-U35 - "11:01 UT" - 2011 UF21


MPEC 2011-U34 - "10:59 UT" - 2011 UE21


<< DOU on 21 Oct. '11 >>  MPEC 2011-U33 - "06:03 UT" - Daily Orbit Update


MPEC 2011-U32 - "00:42 UT" - 2011 UD21

Observers  on 21 October '11

A total of 92 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 10 in MPEC 2011-U42 -- C/2011 S2, C/2011 R1, C/2011 Q4, C/2011 A3, P/2010 JC81, C/2010 G2, C/2008 S3, 213P, 115P, 21P
251Arecibo in Puerto Rico, 1 in radar -- 297418
C60Argelander Institute for Astronomy Obs. (AIfA Obs.) in Germany, 5 in MPEC 2011-U33 -- 2011 SR69, 96315, 36284, 22771, 21088
H49Arkansas Tech Univ. Obs. in Arkansas, 1 in MPEC 2011-U33 -- 2011 TN9
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2011-U37, 2011-U38 & 2011-U39 -- 2011 UL21, 2011 UK21, 2011 UH21
C77Bernezzo Obs., 1 in MPEC 2011-U42 -- 78P
B75Betelgeuse Station in Italy, 4 in MPEC 2011-U42 -- C/2010 S1, C/2009 P1, C/2008 FK75, 213P
300Bisei Spaceguard Center in Japan, 3 in MPECs 2011-U32 & 2011-U33 -- 2011 UH20, 2011 UG20, 2011 UD21
I99Blanquita Obs. in Spain, 2 in MPEC 2011-U42 -- C/2009 P1, 78P
B59Borken Obs. in Germany, 1 in MPEC 2011-U42 -- 78P
B96Brixiis Obs. in Belgium, 7 in MPEC 2011-U42 -- C/2010 S1, P/2010 JC81, C/2010 G2, C/2009 P1, 213P, 131P, 78P
J96Cantabria Obs. in Spain, 1 in MPEC 2011-U42 -- C/2009 P1
B53Casal Lumbroso Obs. in Italy, 2 in MPEC 2011-U42 -- C/2009 P1, 45P
160Castelmartini Obs. in Italy, 4 in MPEC 2011-U42 -- C/2009 P1, 213P, 131P, 78P
703Catalina Sky Survey (CSS) in Arizona, 13 in MPECs 2011-U33, 2011-U38, 2011-U39, 2011-U40 & 2011-U42 -- 2011 UL21, 2011 UK21, 2011 UJ21, P/2011 R3, C/2011 R1, C/2008 S3, 2000 DQ110, 85709, 26760, 164P, 131P, 78P, 36P
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2011-U32, 2011-U33, 2011-U35 & 2011-U36 -- 2011 UG21, 2011 UF21, 2011 UD21, 2011 SO32, 2011 SL102, 2011 SK16, 2011 SJ68, 2011 SJ16, 2011 SF3, 2011 LA19
J01Cielo Profundo Obs. in Spain, 11 in MPEC 2011-U42 -- C/2011 R1, C/2010 S1, C/2010 G2, C/2008 FK75, 242P, 213P, 131P, 130P, 78P, 65P, 49P
821Cordoba-Bosque Alegre Obs., 3 in MPECs 2011-U35, 2011-U36 & 2011-U38 -- 2011 UK21, 2011 UG21, 2011 UF21
B50Corner Obs. in Germany, 2 in MPEC 2011-U42 -- C/2009 P1, 78P
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2011-U33 -- 2011 SO32
958Dax Obs. in France, 22 in MPEC 2011-U42 -- C/2011 S2, P/2011 R3, P/2011 R2, C/2011 R1, P/2011 Q3, C/2011 L3, C/2010 S1, C/2010 G2, C/2009 Y1, C/2009 P1, C/2008 S3, C/2008 FK75, C/2006 S3, 213P, 164P, 130P, 78P, 65P, 49P, 48P, 45P, 9P
448Desert Moon Obs. in New Mexico, 3 in MPEC 2011-U33 -- 2011 SQ25, 2011 MD11, 154275
C81Dolomites Obs., 1 in MPEC 2011-U33 -- 2011 TN9
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2011-U41 -- P/2010 TO20
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 3 in MPECs 2011-U39, 2011-U41 & 2011-U42 -- 2011 UL21, P/2010 TO20, 49P
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-U39 -- 2011 UL21
E10Faulkes Telescope South in New South Wales, 5 in MPECs 2011-U35, 2011-U41 & 2011-U42 -- 2011 UF21, P/2011 N1, C/2011 L4, P/2010 TO20, 213P
762Four Winds Obs. in Michigan, 1 in MPEC 2011-U42 -- C/2009 P1
372Geisei Obs. in Japan, 2 in MPEC 2011-U42 -- C/2011 S2, 45P
B83Gieres Obs. in France, 3 in MPEC 2011-U42 -- C/2009 P1, 213P, 78P
E94Gisborne Obs. in New Zealand, 1 in MPEC 2011-U42 -- C/2011 R1
J95Great Shefford Obs. in England, 2 in MPECs 2011-U32 & 2011-U34 -- 2011 UE21, 2011 UD21
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2011-U42 -- 48P
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2011-U42 -- C/2009 P1
D88Hiratsuka Obs. in Japan, 4 in MPEC 2011-U42 -- C/2010 S1, C/2009 Y1, 213P, 78P
750Hobbs Obs. in Wisconsin, 1 in MPEC 2011-U42 -- C/2009 P1
017Hoher List Obs. in Belgium, 2 in MPEC 2011-U42 -- C/2009 Y1, C/2009 P1
C46Horizon Obs., 2 in MPEC 2011-U42 -- C/2009 P1, 78P
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-U42 -- C/2011 S2
B15Inastars Obs. in Germany, 1 in MPEC 2011-U42 -- 78P
246KLENOT in the Czech Republic, 2 in MPEC 2011-U42 -- P/2011 Q3, 213P
C32Ka-Dar Obs. TAU Station in Russia, 8 in MPEC 2011-U42 -- C/2011 R1, C/2011 L3, C/2010 S1, P/2010 JC81, C/2009 P1, C/2005 L3, 97P, 49P
046Klet Obs. in the Czech Republic, 1 in MPEC 2011-U42 -- 213P
D95Kurihara Obs. in Japan, 8 in MPEC 2011-U42 -- C/2011 S2, P/2010 JC81, C/2010 G2, C/2009 P1, 164P, 65P, 49P, 45P
704LINEAR in New Mexico, 14 in MPECs 2011-U32, 2011-U33, 2011-U41 & 2011-U42 -- 2011 UD21, 2011 TN9, 2011 SM68, 2011 SL102, C/2011 R1, 2011 MD11, 2011 HC36, P/2010 TO20, 2004 QJ7, 190491, 190166, 2201, 130P, 9P
J38La Vara Obs. in Spain, 8 in MPEC 2011-U42 -- C/2009 Y1, C/2009 P1, C/2008 FK75, C/2006 S3, 213P, 130P, 78P, 9P
A14Les Engarouines Obs. in France, 1 in MPEC 2011-U42 -- C/2008 S3
130Lumezzane Obs. in Italy, 3 in MPEC 2011-U42 -- P/2011 P1, C/2009 S3, 81P
B82Maidbronn Obs. in Germany, 4 in MPEC 2011-U42 -- C/2011 F1, C/2010 S1, C/2009 P1, C/2008 S3
C10Maisoncelles Obs. in France, 9 in MPEC 2011-U42 -- C/2011 S2, P/2011 R2, P/2010 JC81, C/2009 P1, 164P, 158P, 78P, 45P, 2P
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-U33 -- 2011 QF48
118Modra Obs. in Slovakia, 1 in MPEC 2011-U39 -- 2011 UL21
213Montcabre Obs. in Spain, 1 in MPEC 2011-U42 -- C/2009 P1
945Monte Deva Obs. in Spain, 5 in MPEC 2011-U42 -- C/2010 S1, C/2010 G2, C/2009 P1, 213P, 78P
108Montelupo Obs. in Italy, 1 in MPEC 2011-U42 -- 78P
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2011-U32, 2011-U33, 2011-U34, 2011-U37 & 2011-U41 -- 2011 UH21, 2011 UE21, 2011 UD21, 2011 SJ189, P/2010 TO20, 2008 WK32, 292220, 250577, 162433
J93Mt. Tuffley Obs. in England, 2 in MPEC 2011-U42 -- C/2009 P1, 78P
E07Murrumbateman Obs. in New South Wales, 1 in MPEC 2011-U42 -- 130P
A13Naef Obs. in Switzerland, 2 in MPEC 2011-U33 -- 90075, 163081
583Odessa-Mayaki Obs. in the Ukraine, 3 in MPECs 2011-U33 & 2011-U42 -- 138524, 213P, 78P
C23Olmen Obs. in Belgium, 12 in MPEC 2011-U42 -- C/2011 L3, C/2010 S1, P/2010 JC81, C/2010 G2, C/2009 P1, C/2008 S3, C/2006 S3, 213P, 78P, 49P, 45P, 21P
F51Pan-STARRS 1 (PS1) in Hawaii, 15 in MPECs 2011-U33, 2011-U35 & 2011-U42 -- 2011 UF21, C/2008 S3, 2007 MM13, 2004 FH11, 2001 GR2, 96744, 96536, 244670, 20429, 137671, 7092, 4503, 130P, 48P, 36P
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-U42 -- 78P
J52Pinsoro Obs. in Spain, 10 in MPEC 2011-U42 -- C/2010 S1, C/2010 G2, C/2009 Y1, C/2009 P1, C/2008 FK75, 213P, 130P, 78P, 48P, 9P
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2011-U42 -- P/2011 R3, 65P
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 11 in MPECs 2011-U39 & 2011-U42 -- 2011 UL21, C/2011 S2, P/2010 JC81, C/2010 G2, 244P, 242P, 164P, 115P, 49P, 45P, 21P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 5 in MPEC 2011-U42 -- P/2011 R3, C/2009 F4, 176P, 130P, 65P
E03`Kevin Hills in England via RAS Obs. Victoria in Victoria, 3 in MPEC 2011-U42 -- C/2011 Q2, 73P-C, 37P
I20Rio Cuarto Obs. in Argentina, 1 in MPEC 2011-U36 -- 2011 UG21
939Rodeno Obs. in Spain, 2 in MPEC 2011-U42 -- C/2010 S1, C/2009 P1
C09Rouet Obs. in France, 3 in MPEC 2011-U42 -- C/2009 P1, 213P, 78P
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2011-U32, 2011-U39 & 2011-U40 -- 2011 UL21, 2011 UJ21, 2011 UD21
104San Marcello Pistoiese Obs. in Italy, 2 in MPEC 2011-U42 -- P/2011 R2, 131P
233San Vito Obs. in Italy, 5 in MPEC 2011-U42 -- C/2010 S1, C/2009 P1, C/2008 FK75, 213P, 78P
H36Sandlot Obs. in Kansas, 4 in MPECs 2011-U32, 2011-U34, 2011-U38 & 2011-U39 -- 2011 UL21, 2011 UK21, 2011 UE21, 2011 UD21
C71Sant Marti Sesgueioles Obs., 9 in MPEC 2011-U42 -- P/2011 R3, P/2011 R2, C/2008 S3, 244P, 213P, 131P, 78P, 65P, 49P
B56Sant Pere Obs. in Spain, 1 in MPEC 2011-U42 -- C/2009 P1
B74Santa Maria de Montmagastrell Obs. in Spain, 3 in MPEC 2011-U42 -- C/2009 P1, C/2008 FK75, 48P
204Schiaparelli Obs. in Italy, 8 in MPECs 2011-U32, 2011-U35, 2011-U37, 2011-U38, 2011-U39, 2011-U40 & 2011-U42 -- 2011 UL21, 2011 UK21, 2011 UJ21, 2011 UH21, 2011 UF21, 2011 UD21, P/2011 R3, 45P
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2011-U33 & 2011-U36 -- 2011 UL10, 2011 UG21
510Siegen Obs. in Germany, 4 in MPEC 2011-U42 -- C/2011 S2, C/2010 G2, C/2009 P1, 78P
A12Sozzago Station, 1 in MPEC 2011-U42 -- 78P
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2011-U33 & 2011-U42 -- 2011 SJ189, P/2011 P1, 2008 UX
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2011-U33, 2011-U34, 2011-U35, 2011-U39 & 2011-U42 -- 2011 UU, 2011 UT, 2011 UL21, 2011 UH20, 2011 UF21, 2011 UE21, 2011 UA, 2011 TQ8, 2011 TC4, 2011 SU68, 2011 SE108, 2011 SD173, 1988 TA, 213P
I93St. Pardon de Conques Obs. in France, 5 in MPECs 2011-U32, 2011-U34, 2011-U35, 2011-U37 & 2011-U42 -- 2011 UH21, 2011 UF21, 2011 UE21, 2011 UD21, C/2009 S3
A71Stixendorf Obs. in Austria, 7 in MPEC 2011-U42 -- P/2011 R3, C/2011 R1, P/2011 Q3, C/2009 P1, C/2008 S3, 213P, 48P
I40TRAPPIST in Chile, 11 in MPEC 2011-U42 -- C/2011 Q4, C/2011 Q2, C/2009 P1, C/2006 W3, C/2006 S3, 213P, 130P, 78P, 49P, 48P, 9P
A98Taurus-1 Obs. in Belarus, 2 in MPEC 2011-U42 -- C/2010 S1, 78P
B51Vallauris Obs. in France, 5 in MPEC 2011-U42 -- C/2010 S1, 176P, 78P, 65P, 49P
H47Vicksburg Obs. in Mississippi, 8 in MPEC 2011-U42 -- P/2011 R3, C/2011 R1, C/2010 G2, 242P, 213P, 130P, 78P, 49P
B42Vitebsk Obs. in Belarus, 4 in MPEC 2011-U42 -- C/2010 S1, C/2008 FK75, 213P, 78P
C75Whitestar Obs., 1 in MPEC 2011-U42 -- P/2011 R3
367Yatsuka Obs. in Japan, 5 in MPEC 2011-U42 -- C/2011 R1, P/2010 JC81, C/2010 G2, 49P, 45P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 October '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2340 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 UL21JPL Sentry15262020-2111802.1e-07-1.64-2.440JPL: "Analysis based on 51 observations spanning 3.9818 days (2011-Oct-17.48272 to 2011-Oct-21.464517)." Diameter approximately 2.600 km. from mean, weighted H=15.6.
2011 UH20JPL Sentry15262042-2109233.6e-06-3.27-3.910JPL: "Analysis based on 23 observations spanning 2.9867 days (2011-Oct-18.15098 to 2011-Oct-21.13771)." Diameter approximately 0.220 km. from mean, weighted H=20.9.
NEODyS15262042-2089229.37e-07-3.83-4.670NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2011-10-18.152 to 2011-10-21.138."
2011 UTJPL Sentry15262034-210995.6e-06-5.82-6.440JPL: "Analysis based on 38 observations spanning 3.0727 days (2011-Oct-17.41107 to 2011-Oct-20.48379)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
NEODyS15262034-208541.73e-06-5.96-6.420NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2011-10-17.412 to 2011-10-20.485."
2011 SD173JPL Sentry15262045-2090136.2e-07-3.64-3.890JPL: "Analysis based on 37 observations spanning 26.047 days (2011-Sep-24.42522 to 2011-Oct-20.47267)." Diameter approximately 0.420 km. from mean, weighted H=19.5.
NEODyS15262062-2090191.08e-06-3.42-3.540NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2011-09-24.426 to 2011-10-20.473."
2011 QF48JPL Sentry1526206723.5e-07-6.40-6.510JPL: "Analysis based on 47 observations spanning 21.769 days (2011-Aug-30.7015 to 2011-Sep-21.470845)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
NEODyS15262067-206723.04e-07-6.46-6.570NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2011-08-30.702 to 2011-09-21.472."

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 October '11

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

1800Grabbed MPEC 2011-U42 - Observations and Orbits of Comets - see above
1526Noted that JPL Sentry has updated its 2011 QF48 risk assessment - see above
Noted that NEODyS has updated its 2011 QF48 risk assessment - see above
Noted that JPL Sentry has updated its 2011 SD173 risk assessment - see above
Noted that NEODyS has updated its 2011 SD173 risk assessment - see above
Noted that JPL Sentry has updated its 2011 UH20 risk assessment - see above
Noted that NEODyS has posted 2011 UH20 as an impact risk - see above
Noted that JPL Sentry has posted 2011 UL21 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 UT risk assessment - see above
Noted that NEODyS has updated its 2011 UT risk assessment - see above
Grabbed MPEC 2011-U33 - Daily Orbit Update - see above
Grabbed MPEC 2011-U34 - 2011 UE21 - see above
Grabbed MPEC 2011-U35 - 2011 UF21 - see above
Grabbed MPEC 2011-U36 - 2011 UG21 - see above
Grabbed MPEC 2011-U37 - 2011 UH21 - see above
Grabbed MPEC 2011-U38 - 2011 UK21 - see above
Grabbed MPEC 2011-U39 - 2011 UL21 - see above
Grabbed MPEC 2011-U40 - 2011 UJ21 - see above
Grabbed MPEC 2011-U41 - Comet P/2010 TO20 (LINEAR-Grauer) - see above
0102Grabbed MPEC 2011-U32 - 2011 UD21 - see above
Noted Radar Astrometry database update - see above