Contents  on 23 October '11

Resources:

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NEOCP Activity  on 23 October '11

The MPC's NEO Confirmation Page has 27 listings

When last checked at 2302 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 27 objects listed. Of these, eighteen were "one nighters." The Tracking News counted a total of 76 listings on the NEOCP on this day.

New MPECs  on 23 October '11

Minor Planet Electronic Circulars

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


MPEC 2011-U60 - "14:30 UT" - 2011 UD64


MPEC 2011-U59 - "14:28 UT" - 2011 UC64


MPEC 2011-U58 - "14:27 UT" - 2011 UB64


MPEC 2011-U57 - "14:09 UT" - 2011 UA64


MPEC 2011-U56 - "14:07 UT" - 2011 UZ63


MPEC 2011-U55 - "14:05 UT" - 2011 UY63


MPEC 2011-U54 - "14:03 UT" - 2011 UX63


MPEC 2011-U53 - "14:02 UT" - 2011 UW63


MPEC 2011-U52 - "13:56 UT" - 2011 UV63


MPEC 2011-U51 - "13:54 UT" - 2011 UU63


MPEC 2011-U50 - "13:46 UT" - 2011 UT63


MPEC 2011-U49 - "13:44 UT" - 2011 US63


MPEC 2011-U48 - "13:43 UT" - 2011 UR63


MPEC 2011-U47 - "13:41 UT" - 2011 UQ63


MPEC 2011-U46 - "13:39 UT" - 2011 UP63


<< DOU on 23 Oct. '11 >>  MPEC 2011-U45 - "06:03 UT" - Daily Orbit Update


MPEC 2011-U44 - "00:16 UT" - 2005 GD60

Observers  on 23 October '11

A total of 34 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 25 in MPECs 2011-U44, 2011-U45, 2011-U46, 2011-U47, 2011-U48, 2011-U49, 2011-U51, 2011-U52, 2011-U53, 2011-U54, 2011-U55, 2011-U56, 2011-U57, 2011-U59 & 2011-U60 -- 2011 UZ63, 2011 UY63, 2011 UX63, 2011 UW63, 2011 UV63, 2011 UU63, 2011 US63, 2011 UR63, 2011 UQ63, 2011 UP63, 2011 UN20, 2011 UK21, 2011 UK10, 2011 UJ21, 2011 UJ10, 2011 UD64, 2011 UC64, 2011 UA64, 2011 UA, 2011 ST232, 2011 SQ26, 2011 SO32, 2011 SB25, 2011 OE, 2005 GD60
A74Bergen-Enkheim Obs. in Germany, 2 in MPECs 2011-U49 & 2011-U58 -- 2011 US63, 2011 UB64
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2011-U45, 2011-U48, 2011-U49, 2011-U50, 2011-U51 & 2011-U53 -- 2011 UW63, 2011 UU63, 2011 UT63, 2011 US63, 2011 UR63, 85628, 21088
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2011-U44, 2011-U45 & 2011-U47 -- 2011 UQ63, 2011 UK10, 2011 UF21, 2005 GD60
G58Chabot Obs. in northern California, 3 in MPECs 2011-U52, 2011-U58 & 2011-U59 -- 2011 UV63, 2011 UC64, 2011 UB64
I45Crucis Obs., 1 in MPEC 2011-U45 -- 2011 SM68
448Desert Moon Obs. in New Mexico, 7 in MPEC 2011-U45 -- 2011 UD, 2011 TG2, 2011 SU232, 2011 SO25, 2011 QY37, 2011 OL51, 2005 VQ
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2011-U45 -- 2212
595Farra d'Isonzo Obs. in Italy, 3 in MPECs 2011-U46, 2011-U49 & 2011-U53 -- 2011 UW63, 2011 US63, 2011 UP63
E10Faulkes Telescope South in New South Wales, 2 in MPECs 2011-U45 & 2011-U47 -- 2011 UQ63, 1917
A17Guidestar Obs. in Germany, 7 in MPECs 2011-U45, 2011-U51 & 2011-U59 -- 2011 UU63, 2011 UE, 2011 UD, 2011 UC64, 2011 TN9, 2011 SO25, 2008 UX
B86Hagen Obs. in Germany, 1 in MPEC 2011-U49 -- 2011 US63
240Herrenberg Obs. in Germany, 3 in MPEC 2011-U45 -- 154275, 136617, 7341
046Klet Obs. in the Czech Republic, 8 in MPEC 2011-U45 -- 2011 UD, 2011 TN9, 2011 TG2, 2011 TA4, 2011 SR69, 2011 SQ12, 2011 PT1, 2011 MO4
704LINEAR in New Mexico, 19 in MPECs 2011-U45, 2011-U46, 2011-U48, 2011-U50, 2011-U51 & 2011-U53 -- 2011 UW63, 2011 UU63, 2011 UT63, 2011 UR63, 2011 UP63, 2011 TN9, 2011 SR69, 2011 OQ5, 2011 LJ19, 2011 HC36, 276274, 16816, 163081, 162273, 152942, 136617, 2212, 1943, 1036
B33Libbiano Obs. in Italy, 1 in MPEC 2011-U46 -- 2011 UP63
H01Magdalena Ridge Obs. (MRO) in New Mexico, 14 in MPECs 2011-U44, 2011-U46, 2011-U47, 2011-U48, 2011-U49, 2011-U50, 2011-U51, 2011-U52, 2011-U54, 2011-U56, 2011-U57, 2011-U58, 2011-U59 & 2011-U60 -- 2011 UZ63, 2011 UX63, 2011 UV63, 2011 UU63, 2011 UT63, 2011 US63, 2011 UR63, 2011 UQ63, 2011 UP63, 2011 UD64, 2011 UC64, 2011 UB64, 2011 UA64, 2005 GD60
118Modra Obs. in Slovakia, 1 in MPEC 2011-U49 -- 2011 US63
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2011-U44, 2011-U45, 2011-U52, 2011-U54, 2011-U55, 2011-U56, 2011-U57, 2011-U58, 2011-U59 & 2011-U60 -- 2011 UZ63, 2011 UY63, 2011 UX63, 2011 UV63, 2011 UD64, 2011 UC64, 2011 UB64, 2011 UA64, 2011 SM120, 2005 GD60, 19764, 190166, 4503
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-U47 -- 2011 UQ63
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-U45 -- 2011 TN9
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2011-U45 -- 2011 OQ5, 2011 KF4, 163081
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-U51 -- 2011 UU63
854Sabino Canyon Obs. in Arizona, 6 in MPECs 2011-U46, 2011-U48, 2011-U50, 2011-U51, 2011-U53 & 2011-U60 -- 2011 UW63, 2011 UU63, 2011 UT63, 2011 UR63, 2011 UP63, 2011 UD64
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2011-U49 & 2011-U51 -- 2011 UU63, 2011 US63
233San Vito Obs. in Italy, 3 in MPEC 2011-U45 -- 53430, 36284, 16960
H36Sandlot Obs. in Kansas, 5 in MPECs 2011-U45 & 2011-U46 -- 2011 UT, 2011 UP63, 2011 UE, 2009 DO111, 2005 BY2
204Schiaparelli Obs. in Italy, 27 in MPECs 2011-U45, 2011-U46, 2011-U48, 2011-U49, 2011-U50, 2011-U51, 2011-U53, 2011-U58 & 2011-U59 -- 2011 UW63, 2011 UU63, 2011 UT63, 2011 US63, 2011 UR63, 2011 UP63, 2011 UK10, 2011 UG10, 2011 UC64, 2011 UB64, 2011 TG2, 2011 TA4, 2011 SQ12, 2011 SJ16, 2011 LJ19, 2011 KF4, 2011 HC36, 2009 SK1, 2009 HV2, 2006 HX5, 2005 CJ, 2004 SV55, 2004 QJ7, 2001 TD45, 2000 DQ110, 1991 TF3, 1990 UA
510Siegen Obs. in Germany, 1 in MPEC 2011-U49 -- 2011 US63
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2011-U45 -- 2007 TH19
291Spacewatch 1.8m telescope in Arizona, 25 in MPECs 2011-U45, 2011-U46, 2011-U47, 2011-U49, 2011-U52, 2011-U54, 2011-U55, 2011-U56, 2011-U57, 2011-U58, 2011-U59 & 2011-U60 -- 2011 UZ63, 2011 UY63, 2011 UX63, 2011 UV63, 2011 UU, 2011 UT, 2011 US63, 2011 UQ63, 2011 UP63, 2011 UK10, 2011 UH20, 2011 UF10, 2011 UD64, 2011 UC64, 2011 UB64, 2011 UA64, 2011 TX8, 2011 SW71, 2011 SV71, 2011 SS67, 2011 SH189, 2011 SF108, 2011 SD173, 2006 SK134, 2005 GD60
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2011-U44, 2011-U46 & 2011-U49 -- 2011 US63, 2011 UP63, 2005 GD60
611Starkenburg Obs. in Germany, 1 in MPEC 2011-U59 -- 2011 UC64
G56Walnut Creek Obs. in northern California, 2 in MPEC 2011-U45 -- 2011 UD, 2011 TG2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 October '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2302 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 UC64JPL Sentry17082093-2110206.3e-06-6.70-7.090JPL: "Analysis based on 42 observations spanning 1.0882 days (2011-Oct-22.324 to 2011-Oct-23.41216)." Diameter approximately 0.009 km. from mean, weighted H=27.8.
2011 US63JPL Sentry17082058-210764.2e-09-4.90-5.500JPL: "Analysis based on 45 observations spanning 2.0919 days (2011-Oct-21.25465 to 2011-Oct-23.34659)." Diameter approximately 0.891 km. from mean, weighted H=17.9.
2011 UR63JPL Sentry1708211029.3e-08-7.65-7.760JPL: "Analysis based on 22 observations spanning 2.0644 days (2011-Oct-21.25408 to 2011-Oct-23.31848)." Diameter approximately 0.024 km. from mean, weighted H=25.7.
2011 UH20NEODyS15442050-2085145.28e-07-4.01-4.320NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2011-10-18.152 to 2011-10-23.109."
JPL Sentry15432050-2109151.9e-06-3.46-3.780JPL: "Analysis based on 33 observations spanning 4.9575 days (2011-Oct-18.15098 to 2011-Oct-23.10852)." Diameter approximately 0.220 km. from mean, weighted H=20.9.
2011 UTNEODyS15442034-204932.0e-06-5.88-6.330NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2011-10-17.412 to 2011-10-22.511."
JPL Sentry15432034-210995.2e-06-5.78-6.310JPL: "Analysis based on 49 observations spanning 5.0988 days (2011-Oct-17.41107 to 2011-Oct-22.50985)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
2011 SD173NEODyS15442062-2090196.01e-07-3.66-3.880NEODyS: "Based on 42 optical observations (of which 1 are rejected as outliers) from 2011-09-24.426 to 2011-10-22.389."
JPL Sentry15432062-209093.5e-07-3.86-4.130JPL: "Analysis based on 41 observations spanning 27.963 days (2011-Sep-24.42522 to 2011-Oct-22.38853)." Diameter approximately 0.420 km. from mean, weighted H=19.5.

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 October '11

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

1708Noted that JPL Sentry has posted 2011 UC64 as an impact risk - see above
Noted that JPL Sentry has posted 2011 UR63 as an impact risk - see above
Noted that JPL Sentry has posted 2011 US63 as an impact risk - see above
1544Noted that NEODyS has updated its 2011 SD173 risk assessment - see above
Noted that NEODyS has updated its 2011 UH20 risk assessment - see above
Noted that NEODyS has updated its 2011 UT risk assessment - see above
1543Noted that JPL Sentry has updated its 2011 SD173 risk assessment - see above
Noted that JPL Sentry has updated its 2011 UH20 risk assessment - see above
Noted that JPL Sentry has updated its 2011 UT risk assessment - see above
Grabbed MPEC 2011-U45 - Daily Orbit Update - see above
Grabbed MPEC 2011-U46 - 2011 UP63 - see above
Grabbed MPEC 2011-U47 - 2011 UQ63 - see above
Grabbed MPEC 2011-U48 - 2011 UR63 - see above
Grabbed MPEC 2011-U49 - 2011 US63 - see above
Grabbed MPEC 2011-U50 - 2011 UT63 - see above
Grabbed MPEC 2011-U51 - 2011 UU63 - see above
Grabbed MPEC 2011-U52 - 2011 UV63 - see above
Grabbed MPEC 2011-U53 - 2011 UW63 - see above
Grabbed MPEC 2011-U54 - 2011 UX63 - see above
Grabbed MPEC 2011-U55 - 2011 UY63 - see above
Grabbed MPEC 2011-U56 - 2011 UZ63 - see above
Grabbed MPEC 2011-U57 - 2011 UA64 - see above
Grabbed MPEC 2011-U58 - 2011 UB64 - see above
Grabbed MPEC 2011-U59 - 2011 UC64 - see above
Grabbed MPEC 2011-U60 - 2011 UD64 - see above
0125Grabbed MPEC 2011-U44 - 2005 GD60 - see above