Contents  on 23 September '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 23 September '11

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2304 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, fourteen were "one nighters." The Tracking News counted a total of 42 listings on the NEOCP on this day.

New MPECs  on 23 September '11

Minor Planet Electronic Circulars

There were twelve MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-S60 - "23:40 UT" - 2011 SP32


MPEC 2011-S59 - "23:28 UT" - 2011 SQ32


MPEC 2011-S58 - "23:13 UT" - 2011 SO32


MPEC 2011-S57 - "23:12 UT" - 2011 SM32


MPEC 2011-S56 - "20:58 UT" - Observations and Orbits of Comets


MPEC 2011-S55 - "16:52 UT" - 2011 SS26


MPEC 2011-S54 - "16:50 UT" - 2011 SR26


MPEC 2011-S53 - "16:48 UT" - 2011 SQ26


MPEC 2011-S52 - "16:46 UT" - 2011 SP26


MPEC 2011-S51 - "16:44 UT" - 2011 SO26


MPEC 2011-S50 - "16:43 UT" - 2011 SN26


<< DOU on 23 Sept. '11 >>  MPEC 2011-S49 - "06:03 UT" - Daily Orbit Update

Observers  on 23 September '11

A total of 75 observers appeared in this day's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 5 in MPEC 2011-S56 -- P/2011 R2, C/2010 S1, C/2010 G2, 130P, 49P
J97Alginet Obs. in Spain, 4 in MPEC 2011-S56 -- C/2011 L3, C/2008 FK75, 213P, 78P
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2011-S49, 2011-S50, 2011-S53, 2011-S54, 2011-S55 & 2011-S58 -- 2011 SS26, 2011 SR5, 2011 SR26, 2011 SQ26, 2011 SO32, 2011 SN26, 2011 SF16, 2011 RZ, 2011 QE38, 2011 NP, 2010 TM167
I74Baxter Garden Obs., 1 in MPEC 2011-S56 -- C/2009 P1
300Bisei Spaceguard Center in Japan, 3 in MPECs 2011-S49 & 2011-S60 -- 2011 SP32, 2011 SF25, 2011 SD25
I99Blanquita Obs. in Spain, 3 in MPEC 2011-S56 -- C/2009 P1, 213P, 78P
B96Brixiis Obs. in Belgium, 1 in MPEC 2011-S56 -- C/2009 P1
215Buchloe Obs. in Germany, 11 in MPEC 2011-S56 -- P/2011 R3, P/2011 R2, P/2011 Q3, C/2011 Q1, C/2011 L3, C/2010 R1, C/2009 UG89, C/2009 P1, C/2007 VO53, 131P, 78P
235CAST Obs. in Italy, 4 in MPEC 2011-S56 -- C/2011 L3, C/2009 P1, 213P, 78P
B53Casal Lumbroso Obs. in Italy, 1 in MPEC 2011-S56 -- 45P
160Castelmartini Obs. in Italy, 9 in MPECs 2011-S49 & 2011-S56 -- 2011 SR5, 2011 QY39, 2011 QE38, 2011 OV4, 2011 LJ19, C/2009 P1, C/2006 S3, 213P, 78P
703Catalina Sky Survey (CSS) in Arizona, 19 in MPECs 2011-S49, 2011-S56, 2011-S59 & 2011-S60 -- 2011 SR5, 2011 SQ32, 2011 SP32, 2011 RR12, 2011 RJ1, P/2011 R2, P/2011 Q3, C/2009 Y1, 2008 SR7, 2004 FH11, 2000 SH8, 1998 SC15, 283460, 162980, 4183, 158P, 131P, 130P, 65P
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2011-S49, 2011-S51 & 2011-S57 -- 2011 SO26, 2011 SM32, 2011 SH16
A77Chante-Perdrix Obs. in France, 3 in MPEC 2011-S56 -- P/2010 JC81, 164P, 45P
J01Cielo Profundo Obs. in Spain, 10 in MPEC 2011-S56 -- P/2011 R3, P/2011 R2, C/2011 R1, C/2010 S1, C/2008 FK75, 213P, 131P, 130P, 78P, 48P
958Dax Obs. in France, 19 in MPEC 2011-S56 -- P/2011 R2, C/2011 R1, C/2011 L3, C/2010 S1, C/2010 R1, C/2010 G2, C/2009 Y1, C/2009 S3, C/2009 P1, C/2008 S3, C/2008 FK75, C/2006 S3, 213P, 130P, 115P, 78P, 65P, 49P, 9P
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2011-S56 -- P/2011 R3
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2011-S58 & 2011-S59 -- 2011 SQ32, 2011 SO32
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 3 in MPECs 2011-S52, 2011-S53 & 2011-S57 -- 2011 SQ26, 2011 SP26, 2011 SM32
E10Faulkes Telescope South in New South Wales, 4 in MPEC 2011-S56 -- 213P-C, 213P-B, 78P, 2P
203GiaGa Obs. in Italy, 1 in MPEC 2011-S56 -- C/2011 L3
B83Gieres Obs. in France, 3 in MPEC 2011-S56 -- C/2009 P1, 213P, 78P
J95Great Shefford Obs. in England, 6 in MPECs 2011-S49, 2011-S54, 2011-S55, 2011-S58, 2011-S59 & 2011-S60 -- 2011 SS26, 2011 SR26, 2011 SQ32, 2011 SP32, 2011 SO32, 2011 SF25
I82Guimar Obs., 1 in MPEC 2011-S56 -- C/2006 S3
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2011-S56 -- C/2009 P1, 213P, 78P
D88Hiratsuka Obs. in Japan, 3 in MPEC 2011-S56 -- P/2010 JC81, C/2010 G2, 45P
I16IAA-AI Atacama in Chile, 2 in MPECs 2011-S49 & 2011-S56 -- 2011 RJ1, P/2011 N1
H15ISON-NM Obs. in New Mexico, 2 in MPEC 2011-S56 -- 213P, 49P
D44Ishigakijima Obs., 2 in MPEC 2011-S56 -- 213P-D, 213P-C
C32Ka-Dar Obs. TAU Station in Russia, 11 in MPEC 2011-S56 -- P/2011 R2, P/2011 Q3, P/2011 P1, C/2010 U3, C/2010 G2, C/2009 P1, 215P, 164P, 131P, 77P, 36P
585Kiev Comet Station in the Ukraine, 1 in MPEC 2011-S56 -- C/2009 Y1
C04Kramatorsk Obs. in the Ukraine, 1 in MPEC 2011-S56 -- 78P
704LINEAR in New Mexico, 11 in MPECs 2011-S49, 2011-S56 & 2011-S58 -- 2011 SQ12, 2011 SO32, 2011 SJ16, P/2011 R2, C/2011 R1, 1998 SC15, 158P, 131P, 130P, 36P, 9P
J38La Vara Obs. in Spain, 6 in MPEC 2011-S56 -- C/2009 Y1, C/2009 P1, C/2008 FK75, 213P, 130P, 78P
B33Libbiano Obs. in Italy, 1 in MPEC 2011-S49 -- 2011 QY39
844Los Molinos Obs. in Uruguay, 1 in MPEC 2011-S49 -- 2011 KF4
130Lumezzane Obs. in Italy, 9 in MPECs 2011-S49 & 2011-S56 -- P/2011 R3, P/2011 R2, 2011 PT1, 2000 SH8, 219071, 138524, 215P, 131P, 36P
B82Maidbronn Obs. in Germany, 3 in MPEC 2011-S56 -- C/2011 L3, C/2009 P1, 213P
C10Maisoncelles Obs. in France, 11 in MPEC 2011-S56 -- P/2011 R3, P/2011 R2, P/2011 Q3, C/2009 P1, C/2006 S3, 213P-B, 213P, 158P, 130P, 115P, 2P
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2011-S51, 2011-S52 & 2011-S56 -- 2011 SP26, 2011 SO26, C/2011 L4
945Monte Deva Obs. in Spain, 5 in MPEC 2011-S56 -- C/2010 S1, C/2009 P1, C/2006 S3, 213P, 78P
900Moriyama Obs. in Japan, 1 in MPEC 2011-S59 -- 2011 SQ32
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2011-S53, 2011-S54 & 2011-S56 -- 2011 SR26, 2011 SQ26, P/2011 R2, 213P
E07Murrumbateman Obs. in New South Wales, 1 in MPEC 2011-S56 -- 48P
A13Naef Obs. in Switzerland, 2 in MPEC 2011-S56 -- 78P, 36P
J47Nazaret Obs. in Spain, 2 in MPEC 2011-S56 -- C/2009 P1, 213P
A24New Millennium Obs. in Italy, 20 in MPECs 2011-S49 & 2011-S56 -- 2011 SF25, 2011 QE48, 2011 QE38, 2011 PT1, 2011 OQ5, 2011 MO4, C/2009 P1, 2004 QB17, 2000 SH8, 96189, 285625, 283460, 138524, 138155, 137799, 7341, 5653, 4503, 3988, 3691
C23Olmen Obs. in Belgium, 4 in MPEC 2011-S56 -- C/2009 P1, 213P, 78P, 21P
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2011-S49, 2011-S50, 2011-S51, 2011-S52, 2011-S53, 2011-S56 & 2011-S57 -- 2011 SQ26, 2011 SP26, 2011 SO26, 2011 SN26, 2011 SM32, P/2011 R2, 2011 QF3, P/2010 J3, C/2008 S3, 143P, 77P, 9P
B49Paus Obs. in Spain, 1 in MPEC 2011-S56 -- C/2008 FK75
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-S56 -- C/2009 P1
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 7 in MPEC 2011-S56 -- P/2011 R3, P/2011 R2, C/2011 R1, P/2010 JC81, C/2010 G2, C/2010 FB87, 164P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 16 in MPECs 2011-S56 & 2011-S60 -- 2011 SP32, P/2011 Q3, C/2011 O1, C/2011 N2, C/2011 L4, C/2011 L1, C/2010 R1, C/2009 Y1, C/2009 P1, C/2006 S3, 158P, 115P, 78P, 48P, 21P, 9P
E03`Kevin Hills in England via RAS Obs. Victoria in Victoria, 2 in MPEC 2011-S56 -- C/2011 Q4, C/2011 Q2
939Rodeno Obs. in Spain, 6 in MPEC 2011-S56 -- C/2010 S1, C/2009 Y1, C/2009 P1, 213P, 130P, 78P
C09Rouet Obs. in France, 4 in MPEC 2011-S56 -- P/2011 R3, C/2011 R1, C/2010 S1, 213P
H36Sandlot Obs. in Kansas, 2 in MPECs 2011-S53 & 2011-S54 -- 2011 SR26, 2011 SQ26
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2011-S56 -- 78P
260&Rob Matson in southern California using the Siding Spring Digitized Sky Survey in New South Wales, 1 in MPEC 2011-S49 -- 2011 MV1
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2011-S56 -- C/2011 Q4, C/2011 Q2
G68Sierra Stars Obs. in northern California, 1 in MPEC 2011-S56 -- C/2009 P1
J84South Obs. in England, 1 in MPEC 2011-S49 -- 2000 SH8
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2011-S55 & 2011-S56 -- 2011 SS26, 172P
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2011-S49, 2011-S50, 2011-S51, 2011-S52, 2011-S55 & 2011-S56 -- 2011 SS26, 2011 SP26, 2011 SO26, 2011 SN26, 2011 SG5, P/2011 JB15
I93St. Pardon de Conques Obs. in France, 6 in MPECs 2011-S54, 2011-S55, 2011-S56, 2011-S58 & 2011-S60 -- 2011 SS26, 2011 SR26, 2011 SP32, 2011 SO32, 213P, 78P
A71Stixendorf Obs. in Austria, 1 in MPEC 2011-S56 -- C/2009 P1
6731program code 1 via Table Mtn. Obs. in southern California, 1 in MPEC 2011-S49 -- 1036
B01Taunus Obs. in Germany, 1 in MPEC 2011-S49 -- 2011 SR25
A98Taurus-1 Obs. in Belarus, 6 in MPECs 2011-S49 & 2011-S56 -- 2011 PT1, 2011 OV4, 2011 LJ19, C/2011 F1, C/2010 S1, C/2009 P1
C35Terrassa Obs., 1 in MPEC 2011-S56 -- C/2007 Q3
B18Terskol Obs. in Russia, 4 in MPECs 2011-S49, 2011-S53, 2011-S58 & 2011-S60 -- 2011 SQ26, 2011 SP32, 2011 SO32, 2011 SF25
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2011-S59 -- 2011 SQ32
B51Vallauris Obs. in France, 1 in MPEC 2011-S56 -- 213P-D
A48Verona Obs. in Italy, 5 in MPEC 2011-S49 -- 2011 SR5, 2011 QE38, 2011 LJ19, 2006 SV134, 2000 SH8
H47Vicksburg Obs. in Mississippi, 7 in MPEC 2011-S56 -- C/2011 R1, 213P, 130P, 78P, 65P, 49P, 9P
367Yatsuka Obs. in Japan, 4 in MPEC 2011-S56 -- C/2010 G2, C/2009 P1, C/2006 S3, 45P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 September '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2304 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 CLOMON 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 EU29JPL Sentry1835212611.8e-08-5.41-5.41-JPL: "Analysis based on 100 observations spanning 28.044 days (2011-Mar-08.20041 to 2011-Apr-05.24487)." Diameter approximately 0.370 km. from mean, weighted H=19.8.
2009 FDJPL Sentry18352185-219021.9e-03-1.76-1.80-JPL: "Analysis based on 175 observations spanning 650.95 days (2009-Feb-24.36493 to 2010-Dec-07.316529)." Diameter approximately 0.130 km. from mean, weighted H=22.1.

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 23 September '11

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

0001 9/24Grabbed MPEC 2011-S57 - 2011 SM32 - see above
Grabbed MPEC 2011-S58 - 2011 SO32 - see above
Grabbed MPEC 2011-S59 - 2011 SQ32 - see above
Grabbed MPEC 2011-S60 - 2011 SP32 - see above
2209Grabbed MPEC 2011-S56 - Observations and Orbits of Comets - see above
1835Noted that JPL Sentry has reposted 2009 FD as an impact risk - see above
Noted that JPL Sentry has reposted 2011 EU29 as an impact risk - see above
Grabbed MPEC 2011-S50 - 2011 SN26 - see above
Grabbed MPEC 2011-S51 - 2011 SO26 - see above
Grabbed MPEC 2011-S52 - 2011 SP26 - see above
Grabbed MPEC 2011-S53 - 2011 SQ26 - see above
Grabbed MPEC 2011-S54 - 2011 SR26 - see above
Grabbed MPEC 2011-S55 - 2011 SS26 - see above
1508Grabbed MPEC 2011-S49 - Daily Orbit Update - see above