Contents  on 6 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 6 September '10

The MPC's NEO Confirmation Page has 13 listings: 13 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had thirteen updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of 27 listings on the NEOCP at some point 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 6 September '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been nine MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-R58 - "19:36 UT" - Comet C/2010 R1 (LINEAR)


MPEC 2010-R57 - "19:23 UT" - 2010 RH31


MPEC 2010-R56 - "19:19 UT" - 2010 RG31


MPEC 2010-R55 - "18:59 UT" - 2010 RF31


MPEC 2010-R54 - "18:55 UT" - 2010 RE31


MPEC 2010-R53 - "18:52 UT" - 2010 RD31


MPEC 2010-R52 - "18:22 UT" - 2010 RC31


<< DOU on 6 Sept. '10 >>  MPEC 2010-R51 - "06:08 UT" - Daily Orbit Update


MPEC 2010-R50 - "04:24 UT" - 2010 RX30

Observers  on 6 September '10

A total of 26 observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2010-R51, 2010-R55, 2010-R56 & 2010-R58 -- 2010 RY3, 2010 RV11, 2010 RT3, 2010 RS3, 2010 RG31, 2010 RF31, 2010 RE, 2010 RB, C/2010 R1, 2010 QA5, 2010 PS65, 2010 PO2, 2010 MF1
A81Balzaretto Obs. in Italy, 6 in MPEC 2010-R51 -- 2010 PR10, 2010 MF1, 2007 TY18, 154029, 152558, 143381
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2010-R51 -- 2010 JM151
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-R50 -- 2010 RX30
160Castelmartini Obs. in Italy, 22 in MPEC 2010-R51 -- 2010 PR10, 2010 PM10, 2010 MF1, 2010 FO92, 2007 VG189, 2005 GE59, 2002 EY2, 2001 RY11, 2000 PQ27, 89830, 66146, 243147, 242211, 241370, 237442, 154029, 153842, 152952, 152558, 143381, 138847, 6239
448Desert Moon Obs. in New Mexico, 4 in MPECs 2010-R51 & 2010-R58 -- C/2010 R1, 2010 QD2, 2005 RR6, 161998
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPECs 2010-R51 & 2010-R58 -- 2010 RA, C/2010 R1
113Drebach Obs. in Germany, 8 in MPECs 2010-R50 & 2010-R51 -- 2010 RX30, 2010 RJ4, 2010 RA, 2010 PM10, 2007 TY18, 2005 GE59, 2002 EY2, 2000 PQ27
157Frasso Sabino Obs. in Italy, 1 in MPEC 2010-R51 -- 2010 RF12
J95Great Shefford Obs. in England, 2 in MPECs 2010-R50 & 2010-R51 -- 2010 RY3, 2010 RX30
A17Guidestar Obs. in Germany, 5 in MPEC 2010-R51 -- 2010 RS3, 2010 RJ4, 2010 RF, 154029, 153842
B86Hagen Obs. in Germany, 1 in MPEC 2010-R50 -- 2010 RX30
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2010-R51 -- 2010 LY63
B15Inastars Obs. in Germany, 1 in MPEC 2010-R50 -- 2010 RX30
704LINEAR in New Mexico, 12 in MPECs 2010-R51 & 2010-R58 -- 2010 RJ4, C/2010 R1, 2010 NW117, 2010 FO92, 243566, 241596, 161998, 142464, 6239, 5786, 5143, 4055
J75La Sagra Obs. in Spain, 6 in MPEC 2010-R51 -- 2005 QY151, 2002 DY3, 1997 GH28, 29075, 19764, 4197
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2010-R50, 2010-R51, 2010-R52, 2010-R53, 2010-R54, 2010-R55, 2010-R57 & 2010-R58 -- 2010 RX30, 2010 RH31, 2010 RF31, 2010 RF12, 2010 RE31, 2010 RD31, 2010 RC31, C/2010 R1
B82Maidbronn Obs. in Germany, 1 in MPEC 2010-R51 -- 2010 RF12
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-R51 -- 2010 FZ80
G96Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2010-R50, 2010-R51, 2010-R52, 2010-R53, 2010-R54, 2010-R55, 2010-R56 & 2010-R57 -- 2010 RY3, 2010 RX30, 2010 RX3, 2010 RH31, 2010 RG31, 2010 RF31, 2010 RE31, 2010 RD31, 2010 RC31
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2010-R51 -- 2001 PH9
A13Naef Obs. in Switzerland, 1 in MPEC 2010-R51 -- 19764
473Remanzacco Obs. in Italy, 1 in MPEC 2010-R55 -- 2010 RF31
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2010-R50 & 2010-R51 -- 2010 RX30, 2010 QN1, 2010 PY22, 2010 OQ1, 2010 OP1, 139345
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2010-R51 & 2010-R52 -- 2010 RW3, 2010 RC31, 2010 QD2, 2010 PS65, 2010 OB101, 2010 KY39, 2010 EX119, 2003 UX5
H83Timberlake Obs. in Virginia, 1 in MPEC 2010-R51 -- 2010 MF1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 September '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 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 RG31JPL Sentry21402022-21101331.9e-07-5.69-6.440JPL: "Analysis based on 17 observations spanning 1.0249 days (2010-Sep-05.23772 to 2010-Sep-06.26266)." Diameter approximately 0.091 km. from mean, weighted H=22.9.
2010 RX30NEODyS14552063-207371.06e-03-4.08-4.090NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2010/09/05.431 to 2010/09/06.095."
JPL Sentry06192038-2080101.1e-03-4.08-4.080JPL: "Analysis based on 43 observations spanning .66357 days (2010-Sep-05.43059 to 2010-Sep-06.09416)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
2010 RQ30NEODyS1455204417.3e-11-6.93-6.930NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2010/09/03.360 to 2010/09/05.340."
2010 RF12JPL Sentry14552058-2110306.4e-04-5.11-5.160JPL #2 for the day: "Analysis based on 46 observations spanning .83346 days (2010-Sep-05.40477 to 2010-Sep-06.23823)." Diameter approximately 0.008 km. from mean, weighted H=28.1.
NEODyS14552083-208541.0e-06-7.85-7.860NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2010/09/05.406 to 2010/09/06.239."
2010 RY3JPL Sentry1455205919.2e-09-8.05-8.050JPL: "Analysis based on 24 observations spanning 3.0106 days (2010-Sep-02.45103 to 2010-Sep-05.46163)." Diameter approximately 0.034 km. from mean, weighted H=25.0.
NEODyS1455R E M O V E D-
2010 RX3JPL Sentry1455R E M O V E DJPL: Risk listing removed at 0950 UTC.
2010 PS65JPL Sentry1455210211.7e-05-4.96-4.960JPL: "Analysis based on 50 observations spanning 23.118 days (2010-Aug-13.29423 to 2010-Sep-05.412641)." Diameter approximately 0.039 km. from mean, weighted H=24.7.

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 6 September '10

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

2140Noted that JPL Sentry has posted 2010 RG31 as an impact risk - see above
1956Grabbed MPEC 2010-R56 - 2010 RG31 - see above
Grabbed MPEC 2010-R57 - 2010 RH31 - see above
Grabbed MPEC 2010-R58 - Comet C/2010 R1 (LINEAR) - see above
1906Grabbed MPEC 2010-R52 - 2010 RC31 - see above
Grabbed MPEC 2010-R53 - 2010 RD31 - see above
Grabbed MPEC 2010-R54 - 2010 RE31 - see above
Grabbed MPEC 2010-R55 - 2010 RF31 - see above
1455Noted that JPL Sentry has updated its 2010 PS65 risk assessment - see above
Noted that JPL Sentry has updated its 2010 RF12 risk assessment - see above
Noted that NEODyS has posted 2010 RF12 as an impact risk - see above
Noted that NEODyS has posted 2010 RQ30 as an impact risk - see above
Noted that JPL Sentry has removed 2010 RX3 as an impact risk - see above
Noted that NEODyS has posted 2010 RX30 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 RY3 risk assessment - see above
Noted that NEODyS has removed 2010 RY3 as an impact risk - see above
Grabbed MPEC 2010-R51 - Daily Orbit Update - see above
0619Noted that JPL Sentry has posted 2010 RX30 as an impact risk - see above
0509Grabbed MPEC 2010-R50 - 2010 RX30 - see above
0203Noted that JPL Sentry has updated its 2010 RF12 risk assessment - see above