Contents  on 22 September '09

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 22 September '09

The MPC's NEO Confirmation Page has 8 listings: 4 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and four updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of twelve 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 22 September '09

Minor Planet Electronic Circulars

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


MPEC 2009-S70 - "15:31 UT" - Comet P/2009 S1 (Gibbs)


MPEC 2009-S69 - "09:51 UT" - 2009 SJ18


MPEC 2009-S68 - "09:47 UT" - 2009 SG18


<< DOU on 22 Sept. '09 >>  MPEC 2009-S67 - "06:07 UT" - Daily Orbit Update

Observers  on 22 September '09

A total of 27 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2009-S67 -- 2009 SQ
H55Astronomical Research Obs. (ARO) in Illinois, 6 in MPEC 2009-S67 -- 2009 SK1, 2009 SK, 2009 SG, 2009 SD1, 2009 QO, 2009 QL2
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2009-S67 -- 2009 MC9, 2009 KC3
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2009-S67 -- 2002 TE66
B75Betelgeuse Station in Italy, 3 in MPEC 2009-S67 -- 2009 NA, 2009 MC9, 2009 KC3
703Catalina Sky Survey (CSS) in Arizona, 19 in MPECs 2009-S67, 2009-S68 & 2009-S70 -- 2009 SG18, 2009 SD1, P/2009 S1, 2009 RD1, 2009 QK2, 2009 KN4, 2005 TG45, 2005 EF, 2004 VA15, 2004 RK, 2002 TE66, 2000 RH60, 67399, 42286, 162196, 161989, 152664, 3753, 1865
G58Chabot Obs. in northern California, 2 in MPEC 2009-S67 -- 2009 SW, 2009 QL2
I21El Condor Obs. in Argentina, 2 in MPECs 2009-S67 & 2009-S70 -- 2009 SG2, P/2009 S1
F65Faulkes Telescope North in Hawaii, 1 in MPEC 2009-S70 -- P/2009 S1
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 6 in MPECs 2009-S67 & 2009-S69 -- 2009 SK15, 2009 SJ18, 2009 SJ15, 2009 SH15, 2009 SD1, 152664
J95Great Shefford Obs. in England, 4 in MPECs 2009-S67, 2009-S68 & 2009-S69 -- 2009 SK15, 2009 SJ18, 2009 SH15, 2009 SG18
A17Guidestar Obs. in Germany, 3 in MPEC 2009-S67 -- 2009 SH15, 159402, 152664
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2009-S67 -- 2003 UL12
704LINEAR in New Mexico, 3 in MPEC 2009-S67 -- 2009 SK15, 1997 US9, 143487
J75La Sagra Obs. in Spain, 2 in MPEC 2009-S67 -- 2009 RD1, 5786
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2009-S67 & 2009-S69 -- 2009 SN1, 2009 SK2, 2009 SJ18, 2009 RD1, 2009 OC3, 2007 HZ, 2002 UN3, 152664, 5786, 4486
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-S70 -- P/2009 S1
I20Rio Cuarto Obs. in Argentina, 3 in MPECs 2009-S67 & 2009-S70 -- P/2009 S1, 2009 RN, 2009 RA4
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-S70 -- P/2009 S1
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-S70 -- P/2009 S1
204Schiaparelli Obs. in Italy, 12 in MPECs 2009-S67, 2009-S68 & 2009-S70 -- 2009 SQ, 2009 SK, 2009 SJ1, 2009 SG18, P/2009 S1, 2009 RZ3, 2009 RM, 2009 RG2, 2009 RD1, 2009 QB36, 2000 RH60, 2000 CO101
B76Schonfeld Obs. in Germany, 1 in MPEC 2009-S67 -- 2009 KC3
H60Shadowbox Obs., 1 in MPEC 2009-S67 -- 159402
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2009-S67 -- 2009 RB4, 2008 JO, 2001 QK142, 96536, 163697
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2009-S67 -- 2009 SW, 2009 SV, 2009 SM1, 2009 SD, 2009 SC, 2009 SB, 2009 RZ3
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-S70 -- P/2009 S1
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-S68 -- 2009 SG18
H53Thompsonville Obs. in Illinois, 2 in MPEC 2009-S67 -- 17274, 5626
C00Velikie Luki Obs. in Russia, 1 in MPEC 2009-S67 -- 2009 KC3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 September '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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 SG18JPL Sentry13422012-21071296.3e-08-2.61-3.230JPL: "Analysis based on 16 observations spanning .98709 days (2009-Sep-21.17145 to 2009-Sep-22.15854)." Diameter approximately 0.955 km. from mean, weighted H=17.7.
2009 SW17NEODyS13422050-2090118.27e-09-5.24-5.750NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2009/09/21.380 to 2009/09/21.821."
JPL Sentry00172046-2107303.9e-08-4.67-5.090JPL: "Analysis based on 17 observations spanning .44189 days (2009-Sep-21.37881 to 2009-Sep-21.8207)." Diameter approximately 0.430 km. from mean, weighted H=19.5.
2009 SV17NEODyS1342204611.9e-11-7.70-7.700NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2009/09/20.229 to 2009/09/21.518."
2009 SBJPL Sentry13422068-210861.7e-07-4.28-4.360JPL: "Analysis based on 27 observations spanning 4.9026 days (2009-Sep-16.24433 to 2009-Sep-21.14696)." Diameter approximately 0.281 km. from mean, weighted H=20.4.
NEODyS13422068-207721.38e-07-4.36-4.410NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2009/09/16.245 to 2009/09/21.148."
2009 RZ3JPL Sentry13422065-209741.8e-09-5.39-5.550JPL: "Analysis based on 52 observations spanning 6.9283 days (2009-Sep-14.20535 to 2009-Sep-21.13364)." Diameter approximately 0.610 km. from mean, weighted H=18.7.
NEODyS1342R E M O V E D-

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 22 September '09

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

1542Grabbed MPEC 2009-S70 - Comet P/2009 S1 (Gibbs) - see above
1342Noted that JPL Sentry has updated its 2009 RZ3 risk assessment - see above
Noted that NEODyS has removed 2009 RZ3 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 SB risk assessment - see above
Noted that NEODyS has updated its 2009 SB risk assessment - see above
Noted that JPL Sentry has posted 2009 SG18 as an impact risk - see above
Noted that NEODyS has posted 2009 SV17 as an impact risk - see above
Noted that NEODyS has posted 2009 SW17 as an impact risk - see above
Grabbed MPEC 2009-S67 - Daily Orbit Update - see above
Grabbed MPEC 2009-S68 - 2009 SG18 - see above
Grabbed MPEC 2009-S69 - 2009 SJ18 - see above
0017Noted that JPL Sentry has posted 2009 SW17 as an impact risk - see above