Contents  on 26 September '09

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

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NEOCP Activity  on 26 September '09

The MPC's NEO Confirmation Page has 30 listings: 3 new, 27 updated

When last checked at 2005 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and 27 updated listings. Of these, 20 were "one nighters." The Tracking News counted a total of 38 listings on the NEOCP at some point on this day.

New MPECs  on 26 September '09

Minor Planet Electronic Circulars

There were nine MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-S106 - "20:40 UT" - 2009 ST103


MPEC 2009-S105 - "20:36 UT" - 2009 SS103


MPEC 2009-S104 - "20:33 UT" - 2009 SR103


MPEC 2009-S103 - "20:29 UT" - 2009 SQ103


MPEC 2009-S102 - "20:26 UT" - 2009 SP103


MPEC 2009-S101 - "20:21 UT" - 2009 SO103


MPEC 2009-S100 - "20:18 UT" - 2009 SN103


MPEC 2009-S99 - "20:14 UT" - 2009 SM103


<< DOU on 26 Sept. '09 >>  MPEC 2009-S98 - "06:11 UT" - Daily Orbit Update

Observers  on 26 September '09

A total of 29 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 3 in MPECs 2009-S98, 2009-S99 & 2009-S106 -- 2009 ST103, 2009 SQ, 2009 SM103
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-S99 -- 2009 SM103
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2009-S98, 2009-S100 & 2009-S106 -- 2009 ST103, 2009 SQ, 2009 SN103, 2009 RN, 2009 RB4, 2009 ML1, 20790, 162215
I21El Condor Obs. in Argentina, 1 in MPEC 2009-S99 -- 2009 SM103
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-S99 -- 2009 SM103
J95Great Shefford Obs. in England, 3 in MPECs 2009-S98, 2009-S101 & 2009-S104 -- 2009 SR103, 2009 SO103, 2009 SH2
A17Guidestar Obs. in Germany, 2 in MPEC 2009-S98 -- 2009 SX1, 2009 RH2
240Herrenberg Obs. in Germany, 2 in MPEC 2009-S98 -- 2007 EL, 2005 EO1
B15Inastars Obs. in Germany, 1 in MPEC 2009-S99 -- 2009 SM103
704LINEAR in New Mexico, 20 in MPECs 2009-S98, 2009-S99 & 2009-S101 -- 2009 SQ, 2009 SO103, 2009 SM103, 2009 QK2, 2004 VA15, 2003 UL12, 2002 NP1, 2002 FB6, 2000 CO101, 1998 SV4, 30825, 216689, 17274, 162998, 162215, 143678, 143487, 5645, 3361, 1943
J75La Sagra Obs. in Spain, 1 in MPEC 2009-S98 -- 2009 QH2
844Los Molinos Obs. in Uruguay, 1 in MPEC 2009-S99 -- 2009 SM103
130Lumezzane Obs. in Italy, 13 in MPEC 2009-S98 -- 2009 QZ34, 2009 QB36, 2009 MC9, 2009 KC3, 2002 NP1, 2000 CO101, 1998 SV4, 217796, 217683, 154244, 143487, 136617, 3361
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2009-S98, 2009-S99, 2009-S102, 2009-S104 & 2009-S106 -- 2009 ST103, 2009 SR103, 2009 SP103, 2009 SM103, 2009 SD15
232Masquefa Obs. in Spain, 1 in MPEC 2009-S99 -- 2009 SM103
118Modra Obs. in Slovakia, 2 in MPECs 2009-S99 & 2009-S106 -- 2009 ST103, 2009 SM103
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2009-S98, 2009-S100, 2009-S102, 2009-S103, 2009-S104 & 2009-S105 -- 2009 SS103, 2009 SR103, 2009 SQ103, 2009 SP103, 2009 SN103, 2009 SG, 2009 SB15, 2009 FY29, 2002 QG24, 5786
J69North Obs. in England, 1 in MPEC 2009-S98 -- 152664
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2009-S99 -- 2009 SM103
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-S98 -- 2009 QO, 2009 QK2, 2009 MC9, 2008 JO, 2005 EF
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-S99 -- 2009 SM103
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-S99 -- 2009 SM103
473Remanzacco Obs. in Italy, 1 in MPEC 2009-S99 -- 2009 SM103
I20Rio Cuarto Obs. in Argentina, 3 in MPEC 2009-S98 -- 2009 SQ, 2009 RM, 2009 RD4
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-S99 & 2009-S100 -- 2009 SN103, 2009 SM103
D21Shenton Park Obs. in Western Australia, 1 in MPEC 2009-S100 -- 2009 SN103
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2009-S98 -- 2009 RB4, 2009 QF34, 2003 TK
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2009-S98, 2009-S102, 2009-S103, 2009-S104 & 2009-S105 -- 2009 SW19, 2009 SW1, 2009 SS103, 2009 SR103, 2009 SQ103, 2009 SP103, 2009 SM1, 2009 SK2, 2009 SH2, 2009 SH, 2009 SG18, 2009 SC, 2009 RU1, 2006 VG13, 2003 SY17, 2001 HZ7
B01Taunus Obs. in Germany, 1 in MPEC 2009-S98 -- 2009 QZ34
G56Walnut Creek Obs. in northern California, 5 in MPECs 2009-S98, 2009-S99, 2009-S101 & 2009-S106 -- 2009 ST103, 2009 SO103, 2009 SM103, 2009 QH2, 2009 MC9
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 September '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2005 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 Sentry14282026-2108283.0e-08-4.31-4.850JPL: "Analysis based on 30 observations spanning 2.2134 days (2009-Sep-23.18426 to 2009-Sep-25.39767)." Diameter approximately 0.386 km. from mean, weighted H=19.7.
NEODyS14282026-2090253.39e-08-4.17-4.850NEODyS: "Based on 31 optical observations (of which 2 are rejected as outliers) from 2009/09/23.185 to 2009/09/25.398."
2009 SG18JPL Sentry14282019-2095334.6e-07-1.99-2.260JPL: "Analysis based on 27 observations spanning 3.9574 days (2009-Sep-21.17145 to 2009-Sep-25.12887)." Diameter approximately 0.895 km. from mean, weighted H=17.9.
NEODyS14282019-2061394.28e-07-2.00-2.310NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2009/09/21.172 to 2009/09/25.130."
2009 SD15JPL Sentry14282081-210522.9e-07-7.52-7.520JPL: "Analysis based on 15 observations spanning 6.0910 days (2009-Sep-19.24181 to 2009-Sep-25.33279)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
NEODyS14282066-208135.31e-07-7.26-7.270NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2009/09/19.243 to 2009/09/25.334."
2009 SH2JPL Sentry14282095-210161.5e-05-5.11-5.160JPL: "Analysis based on 41 observations spanning 7.4034 days (2009-Sep-18.76541 to 2009-Sep-26.16883)." 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 26 September '09

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

0058 9/27Grabbed MPEC 2009-S99 - 2009 SM103 - see above
Grabbed MPEC 2009-S100 - 2009 SN103 - see above
Grabbed MPEC 2009-S101 - 2009 SO103 - see above
Grabbed MPEC 2009-S102 - 2009 SP103 - see above
Grabbed MPEC 2009-S103 - 2009 SQ103 - see above
Grabbed MPEC 2009-S104 - 2009 SR103 - see above
Grabbed MPEC 2009-S105 - 2009 SS103 - see above
Grabbed MPEC 2009-S106 - 2009 ST103 - see above
1428Noted that JPL Sentry has updated its 2009 SD15 risk assessment - see above
Noted that NEODyS has updated its 2009 SD15 risk assessment - see above
Noted that JPL Sentry has updated its 2009 SG18 risk assessment - see above
Noted that NEODyS has updated its 2009 SG18 risk assessment - see above
Noted that JPL Sentry has updated its 2009 SH2 risk assessment - see above
Noted that JPL Sentry has updated its 2009 SW19 risk assessment - see above
Noted that NEODyS has updated its 2009 SW19 risk assessment - see above
Grabbed MPEC 2009-S98 - Daily Orbit Update - see above