Contents  on 30 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 30 September '11

The MPC's NEO Confirmation Page has 22 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 22 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 48 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 30 September '11

Minor Planet Electronic Circulars

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


MPEC 2011-S107 - "18:37 UT" - Observations and Orbits of Comets


MPEC 2011-S106 - "18:10 UT" - 2011 SO189


MPEC 2011-S105 - "18:01 UT" - 2011 SN189


MPEC 2011-S104 - "17:57 UT" - 2011 SM189


MPEC 2011-S103 - "17:55 UT" - 2011 SL189


MPEC 2011-S102 - "17:51 UT" - 2011 SK189


MPEC 2011-S101 - "17:48 UT" - 2011 SJ189


MPEC 2011-S100 - "17:46 UT" - 2011 SH189


MPEC 2011-S99 - "17:44 UT" - 2011 SG189


<< DOU on 30 Sept. '11 >>  MPEC 2011-S98 - "06:04 UT" - Daily Orbit Update

Observers  on 30 September '11

A total of 76 observers appear in today's MPECs.

CodeObserver / observatory
J24Altamira Obs. in the Canary Islands, 16 in MPEC 2011-S107 -- P/2011 R2, C/2011 R1, C/2010 S1, C/2010 G2, C/2009 Y1, C/2009 P1, C/2008 S3, 244P, 242P, 213P, 130P, 115P, 78P, 49P, 21P, 9P
B03Alter Satzberg Obs. in Austria, 2 in MPEC 2011-S98 -- 2011 SR69, 2011 SL102
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2011-S98 -- 2011 QE38
C60Argelander Institute for Astronomy Obs. (AIfA Obs.) in Germany, 12 in MPECs 2011-S98 & 2011-S107 -- 2011 SO32, 1998 SC15, 90075, 39572, 267494, 219071, 16960, 136923, 7341, 4503, 4183, 78P
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2011-S98 & 2011-S101 -- 2011 SV71, 2011 SP26, 2011 SJ189, 2011 SE97, 2011 SA25
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2011-S98 -- 2011 SO32
I99Blanquita Obs. in Spain, 3 in MPEC 2011-S107 -- C/2009 P1, 213P, 78P
432Boambee Obs. in New South Wales, 4 in MPEC 2011-S98 -- 2007 SP6, 2006 GQ2, 2003 FB, 66959
B96Brixiis Obs. in Belgium, 12 in MPEC 2011-S107 -- C/2011 L3, C/2010 S1, C/2010 G2, C/2009 P1, C/2008 S3, C/2008 FK75, 213P, 131P, 78P, 65P, 45P, 36P
215Buchloe Obs. in Germany, 2 in MPEC 2011-S107 -- 164P, 45P
235CAST Obs. in Italy, 5 in MPEC 2011-S107 -- C/2010 G2, C/2009 P1, 213P, 78P, 21P
B66Casasco Obs. in Italy, 2 in MPEC 2011-S107 -- C/2009 P1, 213P
160Castelmartini Obs. in Italy, 13 in MPECs 2011-S98 & 2011-S107 -- 2011 SQ12, 2011 QE38, 2011 PT1, 2011 LJ19, C/2009 P1, 2005 CJ, 2004 SV55, 2000 SP43, 1991 TF3, 163081, 138524, 213P, 78P
703Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2011-S98 & 2011-S107 -- 2011 SL102, 2011 PT1, C/2011 L3, 2011 HD63, 2004 FH11, 155140, 143678, 105140, 131P
G58Chabot Obs. in northern California, 6 in MPEC 2011-S98 -- 2011 SE97, 2011 RZ, 2011 LX10, 2006 OU10, 1998 VN, 154275
J01Cielo Profundo Obs. in Spain, 5 in MPEC 2011-S107 -- P/2011 P1, C/2010 G2, 242P, 213P, 49P
850Cordell-Lorenz Obs. in Tennessee, 6 in MPECs 2011-S98 & 2011-S107 -- C/2011 R1, 2011 OQ5, C/2009 P1, 213P, 164P, 78P
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2011-S98 -- 2011 SQ12
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2011-S98 -- 2011 SM68
C74El Teatrillo de Lyra Obs., 1 in MPEC 2011-S107 -- C/2009 P1
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-S106 -- 2011 SO189
E10Faulkes Telescope South in New South Wales, 3 in MPECs 2011-S98 & 2011-S107 -- 2011 SM68, C/2009 P1, 2P
J95Great Shefford Obs. in England, 1 in MPEC 2011-S102 -- 2011 SK189
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2011-S107 -- C/2009 P1
750Hobbs Obs. in Wisconsin, 1 in MPEC 2011-S107 -- C/2009 P1
C43Hoyerswerda Obs., 1 in MPEC 2011-S107 -- C/2009 P1
H15ISON-NM Obs. in New Mexico, 3 in MPEC 2011-S107 -- 131P, 77P, 21P
C32Ka-Dar Obs. TAU Station in Russia, 2 in MPEC 2011-S107 -- P/2010 JC81, 163P
B02Kielce Obs. in Poland, 1 in MPEC 2011-S107 -- C/2009 P1
585Kiev Comet Station in the Ukraine, 2 in MPEC 2011-S107 -- 213P, 78P
046Klet Obs. in the Czech Republic, 1 in MPEC 2011-S107 -- C/2011 L3
C06Krasnoyarsk Obs. in Russia, 1 in MPEC 2011-S107 -- C/2009 P1
D95Kurihara Obs. in Japan, 11 in MPEC 2011-S107 -- P/2011 R2, C/2011 L3, C/2011 F1, C/2009 P1, C/2006 S3, 213P, 130P, 78P, 48P, 45P, 21P
704LINEAR in New Mexico, 19 in MPECs 2011-S98 & 2011-S107 -- 2011 SR69, 2011 SR25, 2011 RJ1, P/2011 R3, P/2011 R2, 2011 QE38, P/2011 Q3, 2011 GA55, 2008 RJ1, 190491, 190135, 155140, 4183, 244P, 213P, 158P, 131P, 65P, 36P
J38La Vara Obs. in Spain, 8 in MPEC 2011-S107 -- C/2009 Y1, C/2009 P1, C/2008 FK75, 244P, 213P, 131P, 130P, 78P
844Los Molinos Obs. in Uruguay, 1 in MPEC 2011-S107 -- 78P
130Lumezzane Obs. in Italy, 1 in MPEC 2011-S107 -- C/2010 U3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2011-S98, 2011-S100, 2011-S101 & 2011-S102 -- 2011 SY120, 2011 SP26, 2011 SK189, 2011 SJ189, 2011 SH189, 101955
B82Maidbronn Obs. in Germany, 7 in MPEC 2011-S107 -- C/2011 L3, C/2011 F1, C/2009 P1, C/2008 FK75, 213P, 78P, 36P
C10Maisoncelles Obs. in France, 12 in MPEC 2011-S107 -- P/2011 R3, P/2011 R2, C/2010 G2, C/2008 S3, 213P-D, 213P-C, 213P, 176P, 131P, 78P, 45P, 36P
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-S98 -- 2011 PU1
152Moletai Obs. in Lithuania, 4 in MPEC 2011-S107 -- C/2011 S1, C/2009 P1, 213P, 45P
213Montcabre Obs. in Spain, 1 in MPEC 2011-S107 -- C/2009 P1
945Monte Deva Obs. in Spain, 4 in MPEC 2011-S107 -- C/2010 S1, C/2009 P1, 213P, 78P
900Moriyama Obs. in Japan, 18 in MPEC 2011-S107 -- P/2011 R2, C/2011 R1, C/2011 Q4, C/2011 L3, C/2011 A3, C/2010 S1, C/2009 Y1, C/2009 P1, C/2008 S3, C/2008 FK75, C/2006 S3, 213P, 130P, 78P, 48P, 36P, 21P, 9P
474Mt. John Obs. in New Zealand, 16 in MPEC 2011-S98 -- 2011 SU67, 2011 SP68, 2011 SP12, 2011 SO5, 2011 SO26, 2011 SM68, 2011 SM102, 2011 SJ68, 2011 SH16, 2011 SE97, 2011 SE16, 2011 SE108, 2011 QC46, 2009 KJ, 2007 WU4, 2006 BE55
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2011-S98, 2011-S99, 2011-S102, 2011-S103, 2011-S104, 2011-S105, 2011-S106 & 2011-S107 -- 2011 SZ15, 2011 SO189, 2011 SN189, 2011 SM189, 2011 SL189, 2011 SK189, 2011 SG189, C/2011 S1, 2007 QX14, 6491, 36P, 2P
D81Nagano Obs. in Japan, 3 in MPEC 2011-S107 -- P/2010 JC81, C/2010 G2, 45P
J47Nazaret Obs. in Spain, 1 in MPEC 2011-S107 -- C/2009 P1
A24New Millennium Obs. in Italy, 16 in MPEC 2011-S98 -- 2011 LA19, 2011 KP17, 2011 KN9, 2011 JP29, 2011 EZ78, 2010 NJ1, 2009 WW104, 2004 LH, 2004 JO2, 37336, 267759, 20086, 163250, 137170, 7482, 2102
089Nikolaev Obs. in the Ukraine, 3 in MPEC 2011-S107 -- C/2009 P1, 213P, 78P
C47Nonndorf Obs., 1 in MPEC 2011-S107 -- C/2010 S1
C23Olmen Obs. in Belgium, 8 in MPEC 2011-S107 -- P/2010 JC81, C/2010 G2, C/2009 P1, 213P, 78P, 49P, 45P, 21P
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPEC 2011-S107 -- 215P, 163P, 65P, 36P
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-S107 -- 78P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2011-S107 -- P/2011 R2, C/2009 P1, 213P, 78P
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-S107 -- 45P
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 7 in MPEC 2011-S107 -- C/2011 S1, C/2011 R1, P/2011 Q3, P/2010 T1, C/2010 G2, 131P, 45P
071Rhozen Obs. in Bulgaria, 6 in MPEC 2011-S107 -- C/2010 S1, C/2010 G2, C/2009 P1, C/2006 S3, 213P, 78P
C09Rouet Obs. in France, 4 in MPEC 2011-S107 -- C/2010 G2, C/2009 P1, 213P, 78P
104San Marcello Pistoiese Obs. in Italy, 7 in MPECs 2011-S102 & 2011-S107 -- 2011 SK189, C/2011 L3, C/2009 P1, 213P-C, 213P-B, 213P, 78P
233San Vito Obs. in Italy, 1 in MPEC 2011-S107 -- C/2009 P1
H36Sandlot Obs. in Kansas, 4 in MPECs 2011-S98 & 2011-S107 -- 2011 SP68, 2011 SF108, 2011 SE97, 242P
B56Sant Pere Obs. in Spain, 1 in MPEC 2011-S107 -- C/2009 P1
B38Santa Mama Obs. in Italy, 2 in MPEC 2011-S98 -- 2004 SV55, 37336
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-S107 -- C/2011 R1
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-S98 -- 54789
J84South Obs. in England, 1 in MPEC 2011-S98 -- 2004 SV55
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2011-S98, 2011-S100, 2011-S101 & 2011-S107 -- 2011 SJ189, 2011 SH189, 226514, 172P
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2011-S98, 2011-S100 & 2011-S101 -- 2011 SJ189, 2011 SH189, 2011 QF3
I86UCM Obs., 1 in MPEC 2011-S107 -- C/2009 P1
B51Vallauris Obs. in France, 1 in MPEC 2011-S107 -- 36P
H47Vicksburg Obs. in Mississippi, 9 in MPEC 2011-S107 -- C/2011 R1, 242P, 213P, 130P, 78P, 65P, 49P, 36P, 9P
940Waterlooville Obs. in England, 1 in MPEC 2011-S107 -- C/2009 P1
C28Wellinghofen Obs. in Germany, 2 in MPEC 2011-S107 -- C/2009 P1, 78P
C75Whitestar Obs., 1 in MPEC 2011-S107 -- P/2011 R3
367Yatsuka Obs. in Japan, 8 in MPEC 2011-S107 -- C/2011 A3, C/2010 G2, C/2009 P1, C/2006 S3, 49P, 48P, 45P, 21P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 September '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 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 SO189JPL Sentry20012050-2102222.7e-05-5.35-5.700JPL: "Analysis based on 11 observations spanning 1.1381 days (2011-Sep-29.42352 to 2011-Sep-30.56161)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
2011 SM173NEODyS15522058-208975.55e-05-5.50-5.540NEODyS: "Based on 24 optical observations (of which 2 are rejected as outliers) from 2011-09-29.226 to 2011-09-29.909."
JPL Sentry01532058-208974.0e-05-5.64-5.670JPL: "Analysis based on 24 observations spanning .68298 days (2011-Sep-29.22504 to 2011-Sep-29.90802)." Diameter approximately 0.009 km. from mean, weighted H=27.8.
2011 SD173NEODyS15522022-2090601.09e-06-3.09-3.760NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2011-09-24.426 to 2011-09-29.367."
2011 SY120JPL Sentry15522017-206621.1e-09-7.25-7.270JPL: "Analysis based on 23 observations spanning 3.0308 days (2011-Sep-26.34936 to 2011-Sep-29.3802)." Diameter approximately 0.071 km. from mean, weighted H=23.4.
2011 SE97JPL Sentry1552209525.4e-08-7.17-7.170JPL: "Analysis based on 47 observations spanning 3.2015 days (2011-Sep-26.35341 to 2011-Sep-29.55492)." Diameter approximately 0.040 km. from mean, weighted H=24.7.
2011 SV71JPL Sentry15522019-2110494.3e-07-3.05-3.730JPL: "Analysis based on 19 observations spanning 4.8327 days (2011-Sep-24.4869 to 2011-Sep-29.319598)." Diameter approximately 0.737 km. from mean, weighted H=18.3.
NEODyS15522015-2089492.62e-07-3.10-3.770NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2011-09-24.488 to 2011-09-29.320."
2011 SM68JPL Sentry1552201614.7e-05-0.37-0.371JPL: "Analysis based on 72 observations spanning 5.3804 days (2011-Sep-24.35532 to 2011-Sep-29.735687)." Diameter approximately 0.430 km. from mean, weighted H=19.5.
NEODyS15522016-201615.7e-05-0.29-0.291NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2011-09-24.356 to 2011-09-29.736."
2011 SP26JPL Sentry1552R E M O V E DJPL: Risk listing removed at 0930 UTC.
2011 PU1JPL Sentry15522063-2106171.9e-04-4.09-4.510JPL: "Analysis based on 50 observations spanning 45.352 days (2011-Aug-06.9677 to 2011-Sep-21.319885)." Diameter approximately 0.032 km. from mean, weighted H=25.1.
NEODyS15522081-209051.33e-04-4.27-4.40NEODyS: "Based on 50 optical observations (of which 1 are rejected as outliers) from 2011-08-06.968 to 2011-09-21.321."

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 30 September '11

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

2001Noted that JPL Sentry has posted 2011 SO189 as an impact risk - see above
1905Grabbed MPEC 2011-S99 - 2011 SG189 - see above
Grabbed MPEC 2011-S100 - 2011 SH189 - see above
Grabbed MPEC 2011-S101 - 2011 SJ189 - see above
Grabbed MPEC 2011-S102 - 2011 SK189 - see above
Grabbed MPEC 2011-S103 - 2011 SL189 - see above
Grabbed MPEC 2011-S104 - 2011 SM189 - see above
Grabbed MPEC 2011-S105 - 2011 SN189 - see above
Grabbed MPEC 2011-S106 - 2011 SO189 - see above
Grabbed MPEC 2011-S107 - Observations and Orbits of Comets - see above
1552Noted that JPL Sentry has updated its 2011 PU1 risk assessment - see above
Noted that NEODyS has updated its 2011 PU1 risk assessment - see above
Noted that NEODyS has posted 2011 SD173 as an impact risk - see above
Noted that JPL Sentry has posted 2011 SE97 as an impact risk - see above
Noted that NEODyS has posted 2011 SM173 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 SM68 risk assessment - see above
Noted that NEODyS has updated its 2011 SM68 risk assessment - see above
Noted that JPL Sentry has removed 2011 SP26 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 SV71 risk assessment - see above
Noted that NEODyS has updated its 2011 SV71 risk assessment - see above
Noted that JPL Sentry has updated its 2011 SY120 risk assessment - see above
Grabbed MPEC 2011-S98 - Daily Orbit Update - see above
0153Noted that JPL Sentry has posted 2011 SM173 as an impact risk - see above