Contents  on 23 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 23 September '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." So far The Tracking News has counted a total of nine 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 23 September '09

Minor Planet Electronic Circulars

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


MPEC 2009-S75 - "18:46 UT" - 2009 SW19


MPEC 2009-S74 - "18:41 UT" - 2009 SV19


MPEC 2009-S73 - "18:36 UT" - 2009 SU19


MPEC 2009-S72 - "18:32 UT" - 2009 ST19


<< DOU on 23 Sept. '09 >>  MPEC 2009-S71 - "06:08 UT" - Daily Orbit Update

Observers  on 23 September '09

A total of 31 observing facilities appear in today's MPECs.

CodeObserver / observatory
A76Andromeda Obs. in Hungary, 1 in MPEC 2009-S71 -- 152664
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2009-S71 -- 2000 SO10
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2009-S71 -- 2009 SW1
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-S71 -- 2009 RZ3
B75Betelgeuse Station in Italy, 1 in MPEC 2009-S71 -- 2009 SG
B88Bigmuskie Obs. in Italy, 4 in MPEC 2009-S71 -- 2009 RZ3, 152664, 143487, 136617
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-S71 -- 2009 JK1, 154244
A77Chante-Perdrix Obs. in France, 1 in MPEC 2009-S71 -- 2005 TG45
113Drebach Obs. in Germany, 4 in MPECs 2009-S71 & 2009-S72 -- 2009 ST19, 2009 MC9, 2008 JO, 2002 EL6
I21El Condor Obs. in Argentina, 1 in MPEC 2009-S71 -- 2009 QL8
151Eschenberg Obs. in Switzerland, 2 in MPEC 2009-S71 -- 2009 MC9, 1998 SV4
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-S71 -- 2009 SX17
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 4 in MPECs 2009-S72, 2009-S73, 2009-S74 & 2009-S75 -- 2009 SW19, 2009 SV19, 2009 SU19, 2009 ST19
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-S71 -- 3361
704LINEAR in New Mexico, 13 in MPECs 2009-S71 & 2009-S72 -- 2009 ST19, 2009 SJ15, 2009 SH15, 2005 EF, 2000 RH60, 88263, 55408, 30825, 17511, 154244, 143678, 143487, 2212
J75La Sagra Obs. in Spain, 1 in MPEC 2009-S71 -- 162998
560Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2009-S71 -- 2009 SQ, 2008 JO
152Moletai Obs. in Lithuania, 1 in MPEC 2009-S71 -- 2009 NA
474Mt. John Obs. in New Zealand, 10 in MPEC 2009-S71 -- 2009 SW17, 2009 SN1, 2009 SJ15, 2009 SG2, 2009 RZ3, 2009 RH, 2009 RD4, 2009 QY33, 2009 QE34, 159402
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-S71, 2009-S73 & 2009-S74 -- 2009 SV19, 2009 SU19, 1993 RA, 217430, 170891, 163295, 5626
A13Naef Obs. in Switzerland, 2 in MPEC 2009-S71 -- 2009 LX, 2009 HB82
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2009-S71 -- 2009 SG, 2009 MC9, 2000 CO101
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-S72 -- 2009 ST19
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-S72 -- 2009 ST19
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-S72 & 2009-S75 -- 2009 SW19, 2009 ST19
H36Sandlot Obs. in Kansas, 4 in MPECs 2009-S72, 2009-S73, 2009-S74 & 2009-S75 -- 2009 SW19, 2009 SV19, 2009 SU19, 2009 ST19
B74Santa Maria de Montmagastrell Obs. in Spain, 2 in MPECs 2009-S71 & 2009-S72 -- 2009 ST19, 2009 MC9
204Schiaparelli Obs. in Italy, 2 in MPECs 2009-S71 & 2009-S72 -- 2009 ST19, 2009 SG
B76Schonfeld Obs. in Germany, 1 in MPEC 2009-S71 -- 433
691Spacewatch 0.9m telescope in Arizona, 14 in MPECs 2009-S71 & 2009-S75 -- 2009 SW19, 2009 RG2, 2008 JO, 2007 VZ30, 2005 YX128, 2004 QT24, 2003 TK, 2000 OG8, 1998 XX2, 96536, 144922, 143678, 3361, 3288
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2009-S71 & 2009-S73 -- 2009 SW1, 2009 SW, 2009 SU19, 2009 SC15, 2009 SC1, 2009 SB15, 2009 SB, 2009 QZ34
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2009-S71, 2009-S72 & 2009-S75 -- 2009 SW19, 2009 ST19, 2009 SJ18
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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 SW19JPL Sentry22282018-2095162.6e-09-5.04-5.570JPL: "Analysis based on 15 observations spanning .30611 days (2009-Sep-23.18426 to 2009-Sep-23.49037)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
2009 SG18NEODyS13422016-2087248.35e-09-3.47-4.020NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2009/09/21.172 to 2009/09/22.159."
2009 SW17JPL Sentry1342R E M O V E DJPL: Risk listing removed at 0930 UTC.
NEODyS1342R E M O V E D-
2009 SC15JPL Sentry13422029-205825.8e-10-7.36-7.660JPL: "Analysis based on 21 observations spanning 3.1461 days (2009-Sep-19.2394 to 2009-Sep-22.38551)." Diameter approximately 0.207 km. from mean, weighted H=21.1.
NEODyS1342R E M O V E D-
2009 SB15JPL Sentry1342R E M O V E DJPL: Risk listing removed at 0852 UTC.
2009 SBJPL Sentry1342207714.8e-09-5.87-5.870JPL: "Analysis based on 30 observations spanning 6.1232 days (2009-Sep-16.24433 to 2009-Sep-22.36749)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
NEODyS1342207723.39e-09-6.00-6.210NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2009/09/16.245 to 2009/09/22.368."
2009 RZ3JPL Sentry1342R E M O V E DJPL: Risk listing removed at 0851 UTC.

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 23 September '09

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

2228Noted that JPL Sentry has posted 2009 SW19 as an impact risk - see above
1901Grabbed MPEC 2009-S72 - 2009 ST19 - see above
Grabbed MPEC 2009-S73 - 2009 SU19 - see above
Grabbed MPEC 2009-S74 - 2009 SV19 - see above
Grabbed MPEC 2009-S75 - 2009 SW19 - see above
1342Noted that JPL Sentry 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 removed 2009 SB15 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 SC15 risk assessment - see above
Noted that NEODyS has removed 2009 SC15 as an impact risk - see above
Noted that NEODyS has posted 2009 SG18 as an impact risk - see above
Noted that JPL Sentry has removed 2009 SW17 as an impact risk - see above
Noted that NEODyS has removed 2009 SW17 as an impact risk - see above
Grabbed MPEC 2009-S71 - Daily Orbit Update - see above