2010 RF12 & 2010 RX30 fly through the Earth-Moon 
system 8-9 Sept. 2010. Credit: NASA/JPL.

Today the small asteroids 2010 RF12 and 2010 RX30 are flying through the Earth-Moon system. See A/CC's news links for more info and a larger illustration. Illustration credit: NASA/JPL.
Postscript: There were actually an unprecedented three intruders, including 2010 RK53, all inside the Earth-Moon system for about six and half hours on September 8th.


Contents  on 8 September '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.

NEOCP Activity  on 8 September '10

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were three listings noted earlier today.

New MPECs  on 8 September '10

Minor Planet Electronic Circulars

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


MPEC 2010-R72 - "15:05 UT" - Observations of Comets


<< DOU on 8 Sept. '10 >>  MPEC 2010-R71 - "06:09 UT" - Daily Orbit Update

Observers  on 8 September '10

A total of 68 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 9 in MPEC 2010-R72 -- C/2010 G2, C/2009 P1, C/2009 K5, C/2008 FK75, C/2007 Q3-A, C/2006 S3, 236P, 81P, 10P
B54Ager Obs. in Spain, 2 in MPEC 2010-R72 -- 103P, 10P
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2010-R71 -- 2010 RX30, 2010 RT3, 2010 RJ4, 2010 RF12, 2010 RA, 2010 PM10, 2010 MW1
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2010-R72 -- 103P, 10P
I99Blanquita Obs. in Spain, 2 in MPEC 2010-R72 -- 236P, 103P
B59Borken Obs. in Germany, 1 in MPEC 2010-R72 -- 103P
B96Brixiis Obs. in Belgium, 5 in MPEC 2010-R72 -- C/2010 J2, C/2009 UG89, C/2006 S3, 103P, 10P
215Buchloe Obs. in Germany, 4 in MPEC 2010-R72 -- C/2008 S3, C/2006 S3, 243P, 103P
J02Busot Obs. in Spain, 2 in MPEC 2010-R72 -- C/2008 FK75, 103P
235CAST Obs. in Italy, 1 in MPEC 2010-R71 -- 2010 PR66
I77CEAMIG-REA in Brazil, 1 in MPEC 2010-R71 -- 2010 RF12
B20Carmelita Obs. in Spain, 2 in MPEC 2010-R72 -- C/2008 FK75, C/2007 Q3-A
B66Casasco Obs. in Italy, 4 in MPEC 2010-R72 -- C/2010 G2, C/2008 FK75, C/2007 Q3-A, 103P
160Castelmartini Obs. in Italy, 12 in MPECs 2010-R71 & 2010-R72 -- 2010 RX30, C/2010 J2, C/2010 G2, C/2009 UG89, C/2009 P2, C/2008 FK75, 2007 VG189, C/2007 Q3-A, C/2006 S3, 2002 OS4, 103P, 10P
A77Chante-Perdrix Obs. in France, 1 in MPEC 2010-R72 -- C/2006 S3
J01Cielo Profundo Obs. in Spain, 4 in MPEC 2010-R72 -- C/2010 B1, C/2009 P2, C/2006 S3, 103P
176Consell Obs. in Spain, 1 in MPEC 2010-R71 -- 2010 RJ4
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2010-R72 -- 103P
J95Great Shefford Obs. in England, 2 in MPEC 2010-R71 -- 2010 RX30, 2010 RF12
379Hamamatsu-Yuto Obs. in Japan, 2 in MPECs 2010-R71 & 2010-R72 -- 2010 RF12, 103P
A21Irmtraut Obs. in Germany, 1 in MPEC 2010-R72 -- C/2007 Q3-A
987Isle of Man Obs. on the Isle of Man, 3 in MPEC 2010-R72 -- C/2008 FK75, C/2006 S3, 103P
J28Jaen Obs. in Spain, 1 in MPEC 2010-R72 -- 103P
585Kiev Comet Station in the Ukraine, 2 in MPEC 2010-R72 -- C/2010 B1, 103P
D95Kurihara Obs. in Japan, 6 in MPEC 2010-R72 -- C/2010 G2, C/2009 UG89, C/2007 Q3-A, C/2006 S3, 103P, 65P
704LINEAR in New Mexico, 3 in MPEC 2010-R72 -- C/2010 J2, C/2009 UG89, C/2006 S3
J75La Sagra Obs. in Spain, 3 in MPECs 2010-R71 & 2010-R72 -- C/2008 S3, 65679, 4197
J38La Vara Obs. in Spain, 10 in MPEC 2010-R72 -- C/2010 G2, C/2009 UG89, C/2008 FK75, C/2007 VO53, C/2007 Q3-A, C/2006 S3, C/2006 Q1, 236P, 103P, 10P
844Los Molinos Obs. in Uruguay, 1 in MPEC 2010-R72 -- C/2009 P1
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPEC 2010-R71 -- 2010 RX30, 2010 RF12
B82Maidbronn Obs. in Germany, 5 in MPEC 2010-R72 -- C/2010 G2, C/2009 P2, C/2008 FK75, C/2006 S3, 103P
C10Maisoncelles Obs. in France, 2 in MPEC 2010-R72 -- 103P, 10P
J98Manises Obs. in Spain, 1 in MPEC 2010-R72 -- 103P
232Masquefa Obs. in Spain, 6 in MPEC 2010-R72 -- C/2010 G2, C/2008 FK75, C/2007 Q3-A, C/2006 S3, 103P, 10P
711McDonald Obs. in Texas, 1 in MPEC 2010-R71 -- 153842
213Montcabre Obs. in Spain, 1 in MPEC 2010-R72 -- 103P
945Monte Deva Obs. in Spain, 6 in MPEC 2010-R72 -- C/2008 FK75, C/2007 Q3-A, C/2006 S3, 103P, 65P, 10P
900Moriyama Obs. in Japan, 4 in MPEC 2010-R72 -- C/2009 P1, 236P, 103P, 10P
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2010-R72 -- C/2009 P2, 129P
C23Olmen Obs. in Belgium, 1 in MPEC 2010-R72 -- 103P
D92Osaki Obs. in Japan, 7 in MPEC 2010-R72 -- C/2009 P2, C/2008 FK75, C/2007 Q3-A, C/2006 Q1, 236P, 103P, 81P
B49Paus Obs. in Spain, 1 in MPEC 2010-R72 -- 103P
H23Pear Tree Obs. in Florida, 1 in MPEC 2010-R72 -- C/2006 S3
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2010-R72 -- 103P
J53Posadas Obs. in Spain, 6 in MPEC 2010-R72 -- C/2010 J2, C/2010 G2, C/2008 FK75, C/2007 Q3-A, C/2006 S3, 103P
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-R72 -- 243P
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-R71 -- 2010 RF12
473Remanzacco Obs. in Italy, 2 in MPECs 2010-R71 & 2010-R72 -- 2010 RA, C/2008 FK75
939Rodeno Obs. in Spain, 5 in MPEC 2010-R72 -- C/2010 G2, C/2007 Q3-A, C/2006 S3, 103P, 10P
C09Rouet Obs. in France, 5 in MPEC 2010-R72 -- C/2010 B1, C/2009 K5, C/2008 S3, C/2006 S3, 10P
J07SPAG Monfrague Obs. in Spain, 1 in MPEC 2010-R72 -- 103P
461SZTE Asteroid Program in Hungary, 1 in MPEC 2010-R72 -- C/2010 G2
619Sabadell Obs. in Spain, 1 in MPEC 2010-R72 -- 103P
B70Sant Celoni Obs. in Spain, 1 in MPEC 2010-R72 -- 103P
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2010-R72 -- C/2009 K5
204Schiaparelli Obs. in Italy, 1 in MPEC 2010-R72 -- C/2010 G2
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2010-R71 -- 2010 RF12, 68063
510Siegen Obs. in Germany, 4 in MPEC 2010-R72 -- C/2009 K5, C/2008 FK75, C/2006 S3, 103P
G68Sierra Stars Obs. in northern California, 1 in MPEC 2010-R72 -- 103P
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-R71 -- 2010 JE
A97Stammersdorf Obs. in Austria, 1 in MPEC 2010-R72 -- 103P
I66Taurus Australis Obs. in Brazil, 2 in MPEC 2010-R72 -- C/2009 P1, 10P
H53Thompsonville Obs. in Illinois, 1 in MPEC 2010-R72 -- C/2007 Q3-A
H47Vicksburg Obs. in Mississippi, 7 in MPEC 2010-R72 -- C/2010 J2, C/2009 UG89, C/2008 FK75, C/2006 S3, 103P, 81P, 10P
B42Vitebsk Obs. in Belarus, 4 in MPEC 2010-R72 -- C/2008 FK75, C/2006 S3, C/2006 Q1, 103P
C51WISE in Earth polar orbit, 3 in MPECs 2010-R71 & 2010-R72 -- 2010 OC, C/2008 FK75, 2001 RY11
G56Walnut Creek Obs. in northern California, 1 in MPEC 2010-R71 -- 2010 RF12
C28Wellinghofen Obs., 1 in MPEC 2010-R72 -- 103P
367Yatsuka Obs. in Japan, 4 in MPEC 2010-R72 -- C/2008 FK75, C/2006 S3, 103P, 65P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 September '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 RX30JPL Sentry15262063-206636.9e-06-6.29-6.290JPL: "Analysis based on 77 observations spanning 2.5398 days (2010-Sep-05.43059 to 2010-Sep-07.970418)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
NEODyS1526R E M O V E D-
2010 RF12JPL Sentry15262095-2110541.2e-02-3.94-4.020JPL: "Analysis based on 119 observations spanning 2.7075 days (2010-Sep-05.40477 to 2010-Sep-08.11226)." Diameter approximately 0.007 km. from mean, weighted H=28.3.

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 8 September '10

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

1912Noted that the NEOCP has become empty
1526Noted that JPL Sentry has updated its 2010 RF12 risk assessment - see above
Noted that JPL Sentry has updated its 2010 RX30 risk assessment - see above
Noted that NEODyS has removed 2010 RX30 as an impact risk - see above
Grabbed MPEC 2010-R71 - Daily Orbit Update - see above
Grabbed MPEC 2010-R72 - Observations of Comets - see above