Contents  on 27 September '09

Note: These A/CC news pages will update less often and less regularly through Tuesday, September 29th.

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 27 September '09

The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated

When last checked at 2103 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and five 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 27 September '09

Minor Planet Electronic Circulars

As of last check at 2103 UTC, there have been fifteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-S121 - "13:36 UT" - 2009 SU104


MPEC 2009-S120 - "13:20 UT" - 2009 ST104


MPEC 2009-S119 - "13:17 UT" - 2009 SS104


MPEC 2009-S118 - "13:14 UT" - 2009 SR104


MPEC 2009-S117 - "13:08 UT" - 2009 SQ104


MPEC 2009-S116 - "13:06 UT" - 2009 SP104


MPEC 2009-S115 - "12:58 UT" - 2009 SO104


MPEC 2009-S114 - "12:55 UT" - 2009 SN104


MPEC 2009-S113 - "12:52 UT" - 2009 SM104


MPEC 2009-S112 - "12:48 UT" - 2009 SL104


MPEC 2009-S111 - "12:45 UT" - 2009 SK104


MPEC 2009-S110 - "12:29 UT" - 2008 WB59


MPEC 2009-S109 - "12:26 UT" - 2008 YR27


MPEC 2009-S108 - "12:21 UT" - 1995 YR1


<< DOU on 27 Sept. '09 >>  MPEC 2009-S107 - "06:09 UT" - Daily Orbit Update

Observers  on 27 September '09

A total of 37 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2009-S107 -- 2009 SB100
A44Altschwendt Obs. in Austria, 2 in MPECs 2009-S113 & 2009-S119 -- 2009 SS104, 2009 SM104
H55Astronomical Research Obs. (ARO) in Illinois, 4 in MPECs 2009-S112, 2009-S113, 2009-S118 & 2009-S119 -- 2009 SS104, 2009 SR104, 2009 SM104, 2009 SL104
J51Atlante Obs. in the Canary Islands, 3 in MPEC 2009-S107 -- 2009 ST19, 2009 SG2, 3200
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-S107 -- 2009 SG
B75Betelgeuse Station in Italy, 1 in MPEC 2009-S107 -- 433
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-S107, 2009-S112 & 2009-S121 -- 2009 SU104, 2009 SL104, 2009 QH2, 2005 EO1, 16834, 136617
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-S112 -- 2009 SL104
I21El Condor Obs. in Argentina, 2 in MPEC 2009-S107 -- 2009 SG2, 2009 QL8
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-S112 -- 2009 SL104
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 2 in MPEC 2009-S107 -- 2009 SU, 2009 QL8
J77Golden Hill Obs. in England, 1 in MPEC 2009-S112 -- 2009 SL104
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-S107 -- 1943
J95Great Shefford Obs. in England, 7 in MPECs 2009-S107, 2009-S112, 2009-S113, 2009-S118 & 2009-S119 -- 2009 SZ99, 2009 SS104, 2009 SR104, 2009 SN103, 2009 SM104, 2009 SM103, 2009 SL104
A17Guidestar Obs. in Germany, 1 in MPEC 2009-S107 -- 2009 SB100
A35Hormersdorf Obs. in Germany, 1 in MPEC 2009-S107 -- 2009 QG34
704LINEAR in New Mexico, 6 in MPEC 2009-S107 -- 2009 SQ, 2000 CO101, 1997 US9, 67399, 55408, 1865
B33Libbiano Obs. in Italy, 4 in MPECs 2009-S107, 2009-S113, 2009-S118 & 2009-S119 -- 2009 SS104, 2009 SR104, 2009 SM104, 2009 SM103
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2009-S111, 2009-S112, 2009-S113, 2009-S114, 2009-S115, 2009-S116, 2009-S119 & 2009-S120 -- 2009 ST104, 2009 SS104, 2009 SP104, 2009 SO104, 2009 SN104, 2009 SM104, 2009 SL104, 2009 SK104
232Masquefa Obs. in Spain, 1 in MPEC 2009-S107 -- 2009 ST19
213Montcabre Obs. in Spain, 1 in MPEC 2009-S107 -- 2009 ST19
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2009-S107, 2009-S108, 2009-S111, 2009-S112, 2009-S114, 2009-S115, 2009-S116, 2009-S117, 2009-S118 & 2009-S120 -- 2009 SU, 2009 ST104, 2009 SR104, 2009 SQ104, 2009 SP104, 2009 SO104, 2009 SN104, 2009 SL104, 2009 SK104, 2003 TL4, 1995 YR1, 162181
J93Mt. Tuffley Obs. in England, 3 in MPEC 2009-S107 -- 159402, 152664, 433
J69North Obs. in England, 1 in MPEC 2009-S107 -- 152664
B49Paus Obs. in Spain, 1 in MPEC 2009-S107 -- 2009 ST19
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-S107 -- 2009 NE
473Remanzacco Obs. in Italy, 1 in MPEC 2009-S107 -- 2009 ST103
I20Rio Cuarto Obs. in Argentina, 4 in MPEC 2009-S107 -- 2009 SW17, 2009 SH2, 2009 SG2, 2009 RH2
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-S119 -- 2009 SS104
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-S107 -- 2009 ST19
204Schiaparelli Obs. in Italy, 3 in MPEC 2009-S107 -- 2009 SD1, 2009 RB4, 2002 TE66
B76Schonfeld Obs. in Germany, 3 in MPEC 2009-S107 -- 2009 ST19, 17274, 433
D21Shenton Park Obs. in Western Australia, 4 in MPECs 2009-S107 & 2009-S110 -- 2009 SK1, 2009 SH2, 2009 SC100, 2008 WB59
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-S121 -- 2009 SU104
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2009-S113 & 2009-S119 -- 2009 SS104, 2009 SM104
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2009-S107, 2009-S111, 2009-S113, 2009-S117 & 2009-S119 -- 2009 SW1, 2009 SS104, 2009 SQ104, 2009 SN1, 2009 SM98, 2009 SM104, 2009 SM1, 2009 SK104, 2009 SC, 2009 RZ3, 2009 RV1, 2009 QZ34, 2009 QA35, 2006 VG13, 2001 HZ7
926Tenagra II Obs. in Arizona, 7 in MPECs 2009-S108, 2009-S109, 2009-S110, 2009-S112, 2009-S113, 2009-S118 & 2009-S119 -- 2009 SS104, 2009 SR104, 2009 SM104, 2009 SL104, 2008 YR27, 2008 WB59, 1995 YR1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 September '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2103 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few 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
2009 SU104JPL Sentry16012045-2101111.5e-07-6.93-7.560JPL: "Analysis based on 9 observations spanning .24606 days (2009-Sep-27.2669 to 2009-Sep-27.51296)." Diameter approximately 0.029 km. from mean, weighted H=25.3.
2009 SQ104JPL Sentry16352013-2108842.2e-07-4.12-4.220JPL: "Analysis based on 13 observations spanning .95515 days (2009-Sep-26.33466 to 2009-Sep-27.28981)." Diameter approximately 0.245 km. from mean, weighted H=20.7.
2009 SK104JPL Sentry15142032-210466.1e-09-5.14-5.380JPL: "Analysis based on 25 observations spanning 1.9493 days (2009-Sep-25.35558 to 2009-Sep-27.3049)." Diameter approximately 0.567 km. from mean, weighted H=18.9.
2009 ST103NEODyS14002065-207022.06e-10-6.04-6.150NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2009/09/26.130 to 2009/09/26.827."
2009 SZ99JPL Sentry1400R E M O V E DJPL: Risk listing removed at 0856 UTC.
2009 SM98JPL Sentry14002055-210841.8e-06-4.30-4.360JPL: "Analysis based on 26 observations spanning 2.1401 days (2009-Sep-24.24446 to 2009-Sep-26.38458)." Diameter approximately 0.120 km. from mean, weighted H=22.3.
NEODyS1400205519.66e-07-4.50-4.500NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2009/09/24.245 to 2009/09/26.385."
2009 SH2JPL Sentry14002095-209621.1e-05-5.24-5.250JPL: "Analysis based on 47 observations spanning 7.6201 days (2009-Sep-18.76541 to 2009-Sep-26.38553)." 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 27 September '09

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

1635Noted that JPL Sentry has posted 2009 SQ104 as an impact risk - see above
1601Noted that JPL Sentry has posted 2009 SU104 as an impact risk - see above
1514Noted that JPL Sentry has posted 2009 SK104 as an impact risk - see above
1400Noted that JPL Sentry has updated its 2009 SH2 risk assessment - see above
Noted that JPL Sentry has updated its 2009 SM98 risk assessment - see above
Noted that NEODyS has updated its 2009 SM98 risk assessment - see above
Noted that NEODyS has posted 2009 ST103 as an impact risk - see above
Noted that JPL Sentry has removed 2009 SZ99 as an impact risk - see above
Grabbed MPEC 2009-S107 - Daily Orbit Update - see above
Grabbed MPEC 2009-S108 - 1995 YR1 - see above
Grabbed MPEC 2009-S109 - 2008 YR27 - see above
Grabbed MPEC 2009-S110 - 2008 WB59 - see above
Grabbed MPEC 2009-S111 - 2009 SK104 - see above
Grabbed MPEC 2009-S112 - 2009 SL104 - see above
Grabbed MPEC 2009-S113 - 2009 SM104 - see above
Grabbed MPEC 2009-S114 - 2009 SN104 - see above
Grabbed MPEC 2009-S115 - 2009 SO104 - see above
Grabbed MPEC 2009-S116 - 2009 SP104 - see above
Grabbed MPEC 2009-S117 - 2009 SQ104 - see above
Grabbed MPEC 2009-S118 - 2009 SR104 - see above
Grabbed MPEC 2009-S119 - 2009 SS104 - see above
Grabbed MPEC 2009-S120 - 2009 ST104 - see above
Grabbed MPEC 2009-S121 - 2009 SU104 - see above