Contents  on 28 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.

Radar Astrometry  on 28 September '09

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2209 UTC when the database was dated 28 Sept.

NEOCP Activity  on 28 September '09

The MPC's NEO Confirmation Page has 12 listings: 1 new, 11 updated

When last checked at 2355 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and eleven updated listings. Of these, eleven were "one nighters." So far The Tracking News has counted a total of eighteen 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 28 September '09

Minor Planet Electronic Circulars

As of last check at 2355 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-S126 - "21:54 UT" - Comet P/2004 EW38 = 2009 S4 (Catalina-LINEAR)


MPEC 2009-S125 - "15:42 UT" - 2009 SC170


MPEC 2009-S124 - "15:39 UT" - 2009 SB170


<< DOU on 28 Sept. '09 >>  MPEC 2009-S123 - "06:10 UT" - Daily Orbit Update


MPEC 2009-S122 - "00:10 UT" - Comet C/2009 S3 (Lemmon)

Observers  on 28 September '09

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

CodeObserver / observatory
J24Altamira Obs. in Spain, 6 in MPEC 2009-S123 -- 2009 SP, 2009 RD1, 2009 KJ22, 2009 HB82, 17274, 5143
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2009-S123 -- 2009 ST19
H55Astronomical Research Obs. in Illinois, 1 in MPEC 2009-S123 -- 2009 SH2
J51Atlante Obs. in the Canary Islands, 3 in MPEC 2009-S123 -- 2000 CO101, 17274, 433
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-S123 -- 159402
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-S123 -- 2009 SW19
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2009-S123 -- 141018
B88Bigmuskie Obs. in Italy, 2 in MPEC 2009-S123 -- 2009 ST103, 2009 SM103
160Castelmartini Obs. in Italy, 4 in MPEC 2009-S123 -- 2009 SM103, 2002 NP1, 2000 CO101, 17274
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2009-S123 -- 2009 SW, 2009 RV1, 2009 RH2, 2009 RD1, 2009 QG34, 2009 OC, 2009 KM7, 2003 UB10, 12711
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2009-S123 -- 2009 SG, 2009 QE8
113Drebach Obs. in Germany, 3 in MPEC 2009-S123 -- 2009 SG, 2009 QZ34, 2009 KC3
639Dresden Obs. in Germany, 1 in MPEC 2009-S123 -- 2000 CO101
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 152664
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-S123 -- 1943
J95Great Shefford Obs. in England, 5 in MPECs 2009-S122 & 2009-S123 -- 2009 SU104, 2009 SO104, 2009 SN103, 2009 SH2, C/2009 S3
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2009-S123 -- 2009 SM103, 2009 KC3, 2005 MC, 2002 NW16, 2000 CO101
240Herrenberg Obs. in Germany, 1 in MPEC 2009-S123 -- 9202
G89Kachina Obs. in Arizona, 1 in MPEC 2009-S123 -- 2009 SG
682Kanab Obs. in Utah, 1 in MPEC 2009-S123 -- 1995 YR1
704LINEAR in New Mexico, 7 in MPEC 2009-S123 -- 2009 ST103, 2009 SB100, 88263, 35396, 215188, 20790, 154244
A65Le Couvent de Lentin Obs. in France, 1 in MPEC 2009-S123 -- 16834
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2009-S122 & 2009-S124 -- 2009 SB170, C/2009 S3
B28Mandi Obs. in Italy, 1 in MPEC 2009-S123 -- 2009 SM103
118Modra Obs. in Slovakia, 4 in MPEC 2009-S123 -- 2009 SQ, 2009 SM103, 2009 MC9, 2009 KC3
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2009-S122, 2009-S123, 2009-S124 & 2009-S125 -- 2009 SQ103, 2009 SG18, 2009 SC170, 2009 SB170, C/2009 S3, 2008 CM, 2005 TE15, 2004 VA, 2004 QV16, 20429, 17188, 16816, 106538
A13Naef Obs. in Switzerland, 2 in MPEC 2009-S123 -- 2005 EO1, 20790
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2009-S123 -- 2009 SG, 2009 RN, 2009 QZ34, 2009 QB36, 2009 OC, 2009 NA, 2009 ML1, 2009 KC3, 2009 FY29, 2005 TE15
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-S124 -- 2009 SB170
B70Sant Celoni Obs. in Spain, 1 in MPEC 2009-S123 -- 2009 ST19
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-S123 -- 2009 SM103
B76Schonfeld Obs. in Germany, 1 in MPEC 2009-S123 -- 1943
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2009-S123 -- 2009 SU104, 2009 SN103, 2009 SG2, 2009 NH
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2009-S123 -- 30825, 17511, 143678, 3361, 3288
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2009-S123, 2009-S124 & 2009-S126 -- 2009 SZ99, 2009 SW19, 2009 SW1, 2009 SV, 2009 SU19, 2009 SN1, 2009 SM98, 2009 SG18, 2009 SC2, 2009 SC15, 2009 SC, 2009 SB170, 2009 SB, P/2009 S4, 2009 RZ3, 2009 MS
926Tenagra II Obs. in Arizona, 1 in MPEC 2009-S123 -- 2009 SG18
A92Urseanu Obs. in Romania, 2 in MPEC 2009-S123 -- 2009 KC3, 2000 CO101
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 September '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2355 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 Sentry1323206417.0e-10-9.17-9.170JPL: "Analysis based on 14 observations spanning .73509 days (2009-Sep-27.2669 to 2009-Sep-28.00199)." Diameter approximately 0.029 km. from mean, weighted H=25.4.
2009 SQ104NEODyS13232012-2086478.88e-08-4.40-4.630NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2009/09/26.335 to 2009/09/27.291."
2009 SK104NEODyS1323207412.35e-10-6.91-6.910NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/09/25.356 to 2009/09/27.306."
2009 ST103JPL Sentry13232046-2108341.2e-07-3.55-4.400JPL: "Analysis based on 30 observations spanning 1.7495 days (2009-Sep-26.12896 to 2009-Sep-27.87849)." Diameter approximately 0.898 km. from mean, weighted H=17.9.
NEODyS13232057-209071.83e-08-4.16-4.520NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2009/09/26.130 to 2009/09/27.879."
2009 SM98JPL Sentry13232055-210425.3e-07-4.79-4.790JPL: "Analysis based on 29 observations spanning 3.0126 days (2009-Sep-24.24446 to 2009-Sep-27.25709)." Diameter approximately 0.110 km. from mean, weighted H=22.3.
NEODyS1323205511.35e-07-5.36-5.360NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2009/09/24.245 to 2009/09/27.258."
2009 SW19JPL Sentry13232043-210243.7e-09-5.28-5.510JPL: "Analysis based on 36 observations spanning 4.2537 days (2009-Sep-23.18426 to 2009-Sep-27.43797)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS13232026-208895.48e-09-5.10-5.530NEODyS: "Based on 37 optical observations (of which 2 are rejected as outliers) from 2009/09/23.185 to 2009/09/27.439."
2009 SG18JPL Sentry13232019-2095111.2e-07-2.76-3.220JPL: "Analysis based on 36 observations spanning 6.9274 days (2009-Sep-21.17145 to 2009-Sep-28.09884)." Diameter approximately 0.923 km. from mean, weighted H=17.8.
NEODyS13232019-2050116.78e-08-2.99-3.310NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2009/09/21.172 to 2009/09/28.100."
2009 SH2JPL Sentry13232095-209622.5e-06-5.91-5.910JPL: "Analysis based on 57 observations spanning 9.2434 days (2009-Sep-18.76541 to 2009-Sep-28.00886)." 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 28 September '09

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

2355Grabbed MPEC 2009-S126 - Comet P/2004 EW38 = 2009 S4 (Catalina-LINEAR) - see above
2209Noted Radar Astrometry database update - see above
1555Grabbed MPEC 2009-S124 - 2009 SB170 - see above
Grabbed MPEC 2009-S125 - 2009 SC170 - see above
1323Noted 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 NEODyS has posted 2009 SK104 as an impact risk - 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 SQ104 as an impact risk - see above
Noted that JPL Sentry has posted 2009 ST103 as an impact risk - see above
Noted that NEODyS has updated its 2009 ST103 risk assessment - see above
Noted that JPL Sentry has updated its 2009 SU104 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-S123 - Daily Orbit Update - see above
0450Grabbed MPEC 2009-S122 - Comet C/2009 S3 (Lemmon) - see above