Contents  on 17 January '11


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NEOCP Activity  on 17 January '11

The MPC's NEO Confirmation Page has 3 listings: 3 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. Of these, two were "one nighters." The Tracking News counted a total of eleven listings on the NEOCP at some point on this day.

New MPECs  on 17 January '11

Minor Planet Electronic Circulars

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

MPEC 2011-B08 - "22:41 UT" - Comet P/2006 U1 = 2010 A4 (LINEAR)

MPEC 2011-B07 - "21:26 UT" - Comet C/2011 A3 (Gibbs)

MPEC 2011-B06 - "10:31 UT" - 2011 BC

MPEC 2011-B05 - "10:04 UT" - 2011 BB

<< DOU on 17 Jan. '11 >>  MPEC 2011-B04 - "07:12 UT" - Daily Orbit Update

MPEC 2011-B03 - "03:31 UT" - 2011 BA

Observers  on 17 January '11

Eighteen observers appeared in this day's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2011-B07 -- C/2011 A3
300Bisei Spaceguard Center in Japan, 2 in MPECs 2011-B03 & 2011-B07 -- 2011 BA, C/2011 A3
160Castelmartini Obs. in Italy, 2 in MPEC 2011-B04 -- 2011 AL1, 2010 JL33
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2011-B03, 2011-B04 & 2011-B07 -- 2011 BA, C/2011 A3, 256670, 251346, 198856, 164400, 162781
G58Chabot Obs. in northern California, 2 in MPEC 2011-B04 -- 2011 AN37, 2011 AF37
F65%T. Lister via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-B05 -- 2011 BB
J95Great Shefford Obs. in England, 1 in MPEC 2011-B04 -- 2011 AN52
A17Guidestar Obs. in Germany, 1 in MPEC 2011-B04 -- 2011 AL1
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-B08 -- C/2010 A4
704LINEAR in New Mexico, 2 in MPEC 2011-B04 -- 111253, 3122
844Los Molinos Obs. in Uruguay, 1 in MPEC 2011-B04 -- 2011 AN16
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2011-B04, 2011-B05, 2011-B06 & 2011-B07 -- 2011 BC, 2011 BB, C/2011 A3, 2006 AK8, 2003 YO3, 1996 AJ1, 250706, 20826, 152889, 145656, 5143
I89Nerpio Obs. in Italy, 1 in MPEC 2011-B07 -- C/2011 A3
B49Paus Obs. in Spain, 1 in MPEC 2011-B07 -- C/2011 A3
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-B07 -- C/2011 A3
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-B07 -- C/2011 A3
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-B03 -- 2011 BA
204Schiaparelli Obs. in Italy, 3 in MPECs 2011-B03, 2011-B04 & 2011-B07 -- 2011 BA, 2011 AB37, C/2011 A3
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2011-B07 -- C/2011 A3
I15Wishing Star Obs. in Rhode Island, 2 in MPEC 2011-B04 -- 253106, 198856
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 January '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 (backup) risk pages.





Notes for Today's Latest Risk Assessments
2011 AN52NEODyS1605R E M O V E D-
JPL Sentry1605R E M O V E DJPL: Risk listing removed at 1053 UTC.

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 17 January '11

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

2359Grabbed MPEC 2011-B08 - Comet P/2006 U1 = 2010 A4 (LINEAR) - see above
2245Grabbed MPEC 2011-B07 - Comet C/2011 A3 (Gibbs) - see above
1605Noted that JPL Sentry has removed 2011 AN52 as an impact risk - see above
Noted that NEODyS has removed 2011 AN52 as an impact risk - see above
Grabbed MPEC 2011-B04 - Daily Orbit Update - see above
Grabbed MPEC 2011-B05 - 2011 BB - see above
Grabbed MPEC 2011-B06 - 2011 BC - see above
0528Grabbed MPEC 2011-B03 - 2011 BA - see above