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1P/Halley imaged from Giotto on 13 March 1986. (c)Copyright ESA, courtesy of MPAe.

Science@NASA revisited a theory yesterday that most Oort cloud objects such as comet 1P/Halley (seen here in 1986) "had to have formed close to other stars and then been hijacked" by the Sun before leaving its stellar nursery. See June links and also, somewhat related, "Can the Sun's Siblings Be Found?" at Science Now. Image from Giotto, ©copyright ESA, courtesy of MPAe.


Contents  on 24 November '10

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.

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NEOCP Activity  on 24 November '10

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2359 UTC). It was last noted active on November 21st.

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New MPECs  on 24 November '10

Minor Planet Electronic Circulars

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


MPEC 2010-W23 - "18:17 UT" - 2007 WW4


MPEC 2010-W22 - "17:03 UT" - Comet 103P/Hartley


<< DOU on 24 Nov. '10 >>  MPEC 2010-W21 - "07:12 UT" - Daily Orbit Update

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Observers  on 24 November '10

A total of 98 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2010-W22 -- 103P
J97Alginet Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2010-W22 -- 103P
I92Astreo Obs., 1 in MPEC 2010-W22 -- 103P
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2010-W21 -- 2010 SK15, 2010 RN80, 2010 RK43, 2010 RF, 2010 PM10, 2010 PD57, 2003 TX7
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2010-W22 -- 103P
A81Balzaretto Obs. in Italy, 1 in MPEC 2010-W22 -- 103P
C12Berta Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
I32Beta Orionis Obs. in Argentina, 1 in MPEC 2010-W22 -- 103P
B59Borken Obs. in Germany, 1 in MPEC 2010-W22 -- 103P
127Bornheim Obs. in Germany, 3 in MPEC 2010-W21 -- 154029, 152558, 100926
B96Brixiis Obs. in Belgium, 1 in MPEC 2010-W22 -- 103P
215Buchloe Obs. in Germany, 1 in MPEC 2010-W22 -- 103P
235CAST Obs. in Italy, 1 in MPEC 2010-W22 -- 103P
B20Carmelita Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
B66Casasco Obs. in Italy, 1 in MPEC 2010-W22 -- 103P
160Castelmartini Obs. in Italy, 1 in MPEC 2010-W22 -- 103P
470Ceccano Obs. in Italy, 1 in MPEC 2010-W22 -- 103P
A77Chante-Perdrix Obs. in France, 1 in MPEC 2010-W22 -- 103P
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2010-W22 -- 103P
B50Corner Obs. in Germany, 1 in MPEC 2010-W22 -- 103P
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2010-W22 -- 103P
448Desert Moon Obs. in New Mexico, 4 in MPEC 2010-W21 -- 2010 VE139, 189011, 163683, 163412
J19El Maestrat Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2010-W22 -- 103P
F65Faulkes Telescope North in Hawaii, 1 in MPEC 2010-W22 -- 103P
762Four Winds Obs. in Michigan, 1 in MPEC 2010-W22 -- 103P
I88Fuensanta de Martos Obs., 1 in MPEC 2010-W22 -- 103P
B83Gieres Obs. in France, 1 in MPEC 2010-W22 -- 103P
J77Golden Hill Obs. in England, 1 in MPEC 2010-W22 -- 103P
J95Great Shefford Obs. in England, 2 in MPEC 2010-W21 -- 2010 WL, 2010 UE51
442Gualba Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
355Hadano Obs. in Japan, 1 in MPEC 2010-W22 -- 103P
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2010-W22 -- 103P
750Hobbs Obs. in Wisconsin, 1 in MPEC 2010-W22 -- 103P
J37Huelva Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
B15Inastars Obs. in Germany, 1 in MPEC 2010-W22 -- 103P
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2010-W22 -- 103P
J28Jaen Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
185Jurassien-Vicques Obs. in Switzerland, 1 in MPEC 2010-W22 -- 103P
415Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2010-W22 -- 103P
585Kiev Comet Station in the Ukraine, 2 in MPECs 2010-W21 & 2010-W22 -- 5869, 103P
046Klet Obs. in the Czech Republic, 1 in MPEC 2010-W22 -- 103P
168Kourovskaya Obs. in Russia, 1 in MPEC 2010-W22 -- 103P
D95Kurihara Obs. in Japan, 1 in MPEC 2010-W22 -- 103P
J31La Axarquia Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
J38La Vara Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
B33Libbiano Obs. in Italy, 1 in MPEC 2010-W22 -- 103P
I36Los Campitos Obs. in Argentina, 1 in MPEC 2010-W22 -- 103P
844Los Molinos Obs. in Uruguay, 2 in MPECs 2010-W21 & 2010-W22 -- 2010 SC41, 103P
B82Maidbronn Obs. in Germany, 1 in MPEC 2010-W22 -- 103P
C10Maisoncelles Obs. in France, 1 in MPEC 2010-W22 -- 103P
J40Malaga Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
J98Manises Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
232Masquefa Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
A06Mataro Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
568Mauna Kea in Hawaii, 1 in MPEC 2010-W22 -- 103P
118Modra Obs. in Slovakia, 2 in MPECs 2010-W21 & 2010-W22 -- 2010 RF181, 103P
152Moletai Obs. in Lithuania, 1 in MPEC 2010-W22 -- 103P
213Montcabre Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
945Monte Deva Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
B06Montseny Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
900Moriyama Obs. in Japan, 1 in MPEC 2010-W22 -- 103P
J93Mt. Tuffley Obs. in England, 1 in MPEC 2010-W22 -- 103P
J78Murcia Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
J47Nazaret Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
583Odessa-Mayaki Obs. in the Ukraine, 1 in MPEC 2010-W22 -- 103P
C23Olmen Obs. in Belgium, 1 in MPEC 2010-W22 -- 103P
D92Osaki Obs. in Japan, 1 in MPEC 2010-W22 -- 103P
B49Paus Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
H23Pear Tree Obs. in Florida, 1 in MPEC 2010-W22 -- 103P
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2010-W22 -- 103P
J53Posadas Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
C20Pulkovo Obs. Kislovodsk Mtn. Station in Russia, 1 in MPEC 2010-W22 -- 103P
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-W22 -- 103P
473Remanzacco Obs. in Italy, 1 in MPEC 2010-W22 -- 103P
939Rodeno Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
C09Rouet Obs. in France, 1 in MPEC 2010-W22 -- 103P
B56Sant Pere Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
204Schiaparelli Obs. in Italy, 1 in MPEC 2010-W22 -- 103P
D93Sendai Obs. in Japan, 1 in MPEC 2010-W22 -- 103P
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2010-W21 & 2010-W23 -- 2010 UH7, 2007 WW4
510Siegen Obs. in Germany, 1 in MPEC 2010-W22 -- 103P
G68Sierra Stars Obs. in northern California, 1 in MPEC 2010-W22 -- 103P
A97Stammersdorf Obs. in Austria, 1 in MPEC 2010-W22 -- 103P
A71Stixendorf Obs. in Austria, 1 in MPEC 2010-W22 -- 103P
A98Taurus-1 Obs. in Belarus, 1 in MPEC 2010-W22 -- 103P
C35Terrassa Obs., 1 in MPEC 2010-W22 -- 103P
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-W22 -- 103P
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2010-W22 -- 103P
A92Urseanu Obs. in Romania, 1 in MPEC 2010-W22 -- 103P
B51Vallauris Obs. in France, 1 in MPEC 2010-W22 -- 103P
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2010-W22 -- 103P
C28Wellinghofen Obs. in Germany, 1 in MPEC 2010-W22 -- 103P
367Yatsuka Obs. in Japan, 1 in MPEC 2010-W22 -- 103P
J08Zonalunar Obs. in Spain, 1 in MPEC 2010-W22 -- 103P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

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Impact Risk Monitoring  on 24 November '10

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.
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
2010 UE51JPL Sentry16432075-207835.1e-05-6.27-6.640JPL: "Analysis based on 163 observations spanning 25.874 days (2010-Oct-29.25716 to 2010-Nov-24.13111)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
NEODyS16432073-207845.03e-05-6.28-6.630NEODyS: "Based on 167 optical observations (of which 4 are rejected as outliers) from 2010-10-29.258 to 2010-11-24.132."

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.

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Chronology  on 24 November '10

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

1827Grabbed MPEC 2010-W22 - Comet 103P/Hartley - see above
Grabbed MPEC 2010-W23 - 2007 WW4 - see above
1643Noted that JPL Sentry has updated its 2010 UE51 risk assessment - see above
Noted that NEODyS has updated its 2010 UE51 risk assessment - see above
Grabbed MPEC 2010-W21 - Daily Orbit Update - see above