2009-09-25 Tracking News

Contents on 25 September '09

IAU Minor Planet Center
- NEOCP Activity -- 14 listings: 7 new, 7 updated
- New MPECs -- seven MPECs
Observers -- 27 observing facilities
Impact Risk Monitoring -- six objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
News image catalog - new 13-14 Aug. 2009
Old & new CRT Archive
Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access, 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 25 September '09

The MPC's NEO Confirmation Page has 14 listings: 7 new, 7 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven new and seven updated listings. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 26 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 25 September '09

Minor Planet Electronic Circulars

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

MPEC 2009-S91 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2009-S92 time-stamped "13:15 UT" - 2009 SZ99 - see below
MPEC 2009-S93 time-stamped "13:22 UT" - 2009 SA100 - see below
MPEC 2009-S94 time-stamped "14:08 UT" - 2009 SB100 - see below
MPEC 2009-S95 time-stamped "14:17 UT" - 2009 SC100 - see below
MPEC 2009-S96 time-stamped "19:17 UT" - Comet P/2009 S1 (Gibbs) - see below
MPEC 2009-S97 time-stamped "23:02 UT" - 2003 QA112

MPEC 2009-S97 - "23:02 UT" - 2003 QA112

K03QB2A 2003 QA112 from Las Campanas Obs. (2004 May 28.30p1 at R=22.8 & 2004 May 28.43p1) and Lowell Obs. Anderson Mesa Station (Aug. 20.39p1 at R=22.6, 20.44p1, Sept. 17.33p1 at R=22.3, 17.38p1, 18.32p1 at R=22.3 & 18.38p1)

MPEC 2009-S96 - "19:17 UT" - Comet P/2009 S1 (Gibbs)

PK09S010 P/2009 S1 from Kiev Comet Station (Sept. 24.09-10p6) and Tzec Maun Obs. Mayhill (Sept. 25.39-40p3)

MPEC 2009-S95 - "14:17 UT" - 2009 SC100

K09SA0C 2009 SC100 was discovered at 0802 UT on 25 Sept. by the Mt. Lemmon Survey (MLS), which observed it at Sept. 25.34-44p11. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Sept. 25.43-45p4) and Sabino Canyon Obs. (Sept. 25.44p2).

MPEC 2009-S94 - "14:08 UT" - 2009 SB100

K09SA0B 2009 SB100 was discovered at 0610 UT on 25 Sept. by the Catalina Sky Survey (CSS), which observed it at Sept. 25.26-28p4. The discovery was confirmed by MRO (Sept. 25.34-35p4 & 25.47-48p3), Sabino Canyon Obs. (Sept. 25.39p3), and Sandlot Obs. (Sept. 25.39p3).

MPEC 2009-S93 - "13:22 UT" - 2009 SA100

K09SA0A 2009 SA100 was discovered at 1331 UT on 24 Sept. by the Siding Spring Survey (SSS), which observed it at Sept. 24.56-59p4, 24.65p2, and 24.72-73p2. The discovery was confirmed by El Condor Obs. (Sept. 24.98p1), Tanti Obs. (Sept. 25.20-21p4), MRO (Sept. 25.23-24p5), and Sabino Canyon Obs. (Sept. 25.27-28p3).

MPEC 2009-S92 - "13:15 UT" - 2009 SZ99

K09S99Z 2009 SZ99 (risk-listed) was discovered at 0232 UT on 22 Sept. by MLS, which observed it at Sept. 22.11-12p7 and 25.10-11p8. The discovery was confirmed by CSS (Sept. 22.11p1) and the Spacewatch 1.8m telescope (Sept. 24.12-13p3).

<< DOU on 25 Sept. '09 >> MPEC 2009-S91 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K09S98O 2009 SO98 (small asteroid, arc=1 day, H=24.4 ~45m) from Great Shefford Obs. (Sept. 25.03p3)
K09S98M 2009 SM98 (small asteroid, Q=4.296 AU, arc=1 day, H=22.3 ~117m) from Great Shefford Obs. (Sept. 24.96-97p2)
K09S19W 2009 SW19 (i=62.6°, arc=2 days, H=19.9 ~355m) from Castelmartini Obs. (Sept. 23.99-00p3), Shenton Park Obs. (Sept. 24.71-72p3), and Great Shefford Obs. (Sept. 25.12p3)
K09S18G 2009 SG18 (i=55.6°, arc=4 days, H=17.9 ~891m) from Spacewatch 1.8m (Sept. 24.14-15p3) and Great Shefford Obs. (Sept. 24.86-87p3)
K09S02H 2009 SH2 (small asteroid, arc=6 days, H=24.6 ~41m) from SSS (Sept. 23.73p2), MRO (Sept. 24.46-47p3), Shenton Park Obs. (Sept. 24.80p3), and Great Shefford Obs. (Sept. 25.13p3)
Observations of recently (no longer) risk-listed objects
K09S17W 2009 SW17 (arc=2 days, H=19.6 ~407m) from Schiaparelli Obs. (Sept. 22.07p2 & 22.12p2) and SSS (Sept. 23.70-71p2)
K09S17V 2009 SV17 (Q=4.440 AU, arc=4 days, H=19.4 ~446m) from Spacewatch 1.8m (Sept. 24.22-23p3)
K09S15C 2009 SC15 (arc=5 days, H=21.6 ~162m) from Spacewatch 1.8m (Sept. 24.23-24p3)
K09S02K 2009 SK2 (i=38.2°, arc=5 days, H=18.6 ~645m) from MLS (Sept. 23.41-42p4)
K09S02G 2009 SG2 (arc=5 days, H=20.2 ~309m) from SSS (Sept. 23.69p2) and Shenton Park Obs. (Sept. 24.75p3)
K09S01W 2009 SW1 (small asteroid, arc=6 days, H=23.7 ~62m) from Spacewatch 1.8m (Sept. 24.41-43p3)
K09R03Z 2009 RZ3 (i=52.7°, arc=9 days, H=18.7 ~616m) from the Spacewatch 0.9m telescope (Sept. 22.17-19p3)
K09Q34F 2009 QF34 (small asteroid, arc=28 days, H=22.6 ~102m) from Spacewatch 1.8m (Sept. 24.28-31p3)
Observations of small asteroids (H>22.0)
K09S18J 2009 SJ18 (arc=4 days, H=24.6 ~41m) from Great Shefford Obs. (Sept. 25.15-16p3)
K09S15K 2009 SK15 (arc=5 days, H=25.3 ~29m) from Schiaparelli Obs. (Sept. 21.98-99p5) and Great Shefford Obs. (Sept. 25.14p3)
K09S15J 2009 SJ15 (arc=5 days, H=22.9 ~89m) from Schiaparelli Obs. (Sept. 22.04p3) and Shenton Park Obs. (Sept. 24.84-85p2)
K09S15H 2009 SH15 (arc=5 days, H=24.5 ~43m) from Great Shefford Obs. (Sept. 25.14-15p3)
K09S02L 2009 SL2 (arc=5 days, H=22.1 ~129m) from SSS (Sept. 23.56-57p2)
K09R01U 2009 RU1 (arc=12 days, H=24.3 ~47m) from Spacewatch 1.8m (Sept. 24.24-26p3)
K09R00H 2009 RH (arc=14 days, H=23.8 ~59m) from Shenton Park Obs. (Sept. 24.52p3)
K09P00H 2009 PH (arc=45 days, H=22.1 ~129m) from Spacewatch 1.8m (Sept. 24.10-11p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09R01V 2009 RV1 (Q=4.324 AU, arc=10 days, H=22.0 ~135m) from Spacewatch 0.9m (Sept. 22.44-47p3)
Observations of other objects
K09S19T 2009 ST19 (arc=9 days, H=18.5 ~676m) from Montcabre Obs. (Sept. 24.98p3), Paus Obs. (Sept. 25.07-08p4), and Great Shefford Obs. (Sept. 25.17-18p3)
K09S02F 2009 SF2 (arc=6 days, H=20.6 ~257m) from Sandlot Obs. (Sept. 24.43-44p3)
K09S02C 2009 SC2 (i=42.7°, arc=6 days, H=19.7 ~389m) from Spacewatch 1.8m (Sept. 24.32-33p3)
K09S00P 2009 SP (arc=7 days, H=19.4 ~446m) from Shenton Park Obs. (Sept. 24.65-66p2)
K09S00N 2009 SN (arc=5 days, H=21.7 ~155m) from Schiaparelli Obs. (Sept. 21.86p1)
K09S00M 2009 SM (arc=8 days, H=19.0 ~537m) from Shenton Park Obs. (Sept. 24.74p2)
K09S00G 2009 SG (i=39.5°, arc=8 days, H=19.7 ~389m) from El Condor Obs. (Sept. 24.08-11p2)
K09R04D 2009 RD4 (Q=4.334 AU, arc=11 days, H=20.6 ~257m) from Shenton Park Obs. (Sept. 24.58-59p3)
K09R04B 2009 RB4 (arc=10 days, H=18.1 ~812m) from Shenton Park Obs. (Sept. 24.68-69p3)
K09R04A 2009 RA4 (arc=10 days, H=21.6 ~162m) from Shenton Park Obs. (Sept. 24.70-71p3)
K09Q34D 2009 QD34 (arc=29 days, H=17.9 ~891m) from CSS (Sept. 22.45-47p3) and Shenton Park Obs. (Sept. 24.82-84p3)
K09O09P 2009 OP9 (arc=57 days, H=19.4 ~446m) from Sandlot Obs. (Sept. 24.45-46p3) and Shenton Park Obs. (Sept. 24.86-87p4)
K09N00A 2009 NA (Q=4.131 AU, arc=85 days, H=17.5 ~1.07 km) from Moletai Obs. (Sept. 21.97p2)
K09L00X 2009 LX (Q=4.543 AU, arc=104 days, H=19.3 ~467m) from MLS (Sept. 23.25-29p4)
K09K03C 2009 KC3 (Q=5.454 AU, arc=143 days, H=18.1 ~812m) from Velikie Luki Obs. (Sept. 24.76-77p3)
K09H82B 2009 HB82 (Q=4.413 AU, arc=154 days, H=17.8 ~933m) from Naef Obs. (Sept. 24.83-86p2)
K09H77V 2009 HV77 (arc=157 days, H=20.7 ~245m) from CSS (Sept. 24.25-26p4)
K09F04U 2009 FU4 (arc=2 opp, H=17.9 ~891m) from Shenton Park Obs. (Sept. 24.53p3) and Tanti Obs. (Sept. 25.15-16p3)
K05YC8X 2005 YX128 (arc=3 opp, H=18.8 ~589m) from Spacewatch 0.9m (Sept. 24.16p1)
K05U05M 2005 UM5 (arc=2 opp, H=20.8 ~234m) from Spacewatch 1.8m (Sept. 24.39p2 at V=22.8)
K05S19G 2005 SG19 (Q=4.171 AU, arc=2 opp, H=16.6 ~1.62 km) from SSS (Sept. 24.61-64p4)
K05E00F 2005 EF (arc=2 opp, H=20.7 ~245m) from Schiaparelli Obs. (Sept. 23.02p3)
K04V00A 2004 VA (arc=5 opp, H=17.3 ~1.17 km) from MLS (Sept. 24.37-40p4)
K04T00N 2004 TN (arc=3 opp, H=19.2 ~490m) from MLS (Sept. 24.37-40p4)
K03S17Y 2003 SY17 (arc=3 opp, H=18.1 ~812m) from Spacewatch 1.8m (Sept. 24.37p1)
K02R25Q 2002 RQ25 (arc=4 opp, H=20.5 ~269m) from Jarnac Obs. (Sept. 24.27-29p3)
G2998 162998 2001 SK162 from Spacewatch 1.8m (Sept. 24.27-30p3)
G2980 162980 2001 RR17 from CSS (Sept. 24.42-44p4)
F9402 159402 1999 AP10 from Guidestar Obs. (Sept. 24.79-82p2)
E4922 144922 2005 CK38 from Spacewatch 0.9m (Sept. 24.44p1)
E1018 141018 2001 WC47 from MLS (Sept. 24.38-40p4)
55408 55408 2001 TC2 from Spacewatch 0.9m (Sept. 24.41-45p3)
17274 17274 2000 LC16 from Velikie Luki Obs. (Sept. 24.73-75p3)
03552 3552 Don Quixote (1983 SA) from Tanti Obs. (Sept. 25.12-13p3)
03361 3361 Orpheus (1982 HR) from Goodricke-Pigott Obs. (Sept. 23.32-34p2)
00433 433 Eros (1898 DQ) from Siegen Obs. (Sept. 17.98p3 & 24.81p3)

Observers on 25 September '09

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

Code	Observer / observatory
`160`	Castelmartini Obs. in Italy, 1 in MPEC 2009-S91 -- 2009 SW19
`703`	Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2009-S91, 2009-S92 & 2009-S94 -- 2009 SZ99, 2009 SB100, 2009 QD34, 2009 HV77, 162980
`I21`	El Condor Obs. in Argentina, 2 in MPECs 2009-S91 & 2009-S93 -- 2009 SG, 2009 SA100
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-S91 -- 3361
`J95`	Great Shefford Obs. in England, 9 in MPEC 2009-S91 -- 2009 SW19, 2009 ST19, 2009 SO98, 2009 SM98, 2009 SK15, 2009 SJ18, 2009 SH2, 2009 SH15, 2009 SG18
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2009-S91 -- 159402
`G92`	Jarnac Obs. in Arizona, 1 in MPEC 2009-S91 -- 2002 RQ25
`585`	Kiev Comet Station in the Ukraine, 1 in MPEC 2009-S96 -- P/2009 S1
`304`	Las Campanas Obs. in Chile, 1 in MPEC 2009-S97 -- 2003 QA112
`688`	Lowell Obs. Anderson Mesa Station in Arizona, 1 in MPEC 2009-S97 -- 2003 QA112
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-S91, 2009-S93, 2009-S94 & 2009-S95 -- 2009 SH2, 2009 SC100, 2009 SB100, 2009 SA100
`152`	Moletai Obs. in Lithuania, 1 in MPEC 2009-S91 -- 2009 NA
`213`	Montcabre Obs. in Spain, 1 in MPEC 2009-S91 -- 2009 ST19
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-S91, 2009-S92 & 2009-S95 -- 2009 SZ99, 2009 SK2, 2009 SC100, 2009 LX, 2004 VA, 2004 TN, 141018
`A13`	Naef Obs. in Switzerland, 1 in MPEC 2009-S91 -- 2009 HB82
`B49`	Paus Obs. in Spain, 1 in MPEC 2009-S91 -- 2009 ST19
`854`	Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-S93, 2009-S94 & 2009-S95 -- 2009 SC100, 2009 SB100, 2009 SA100
`H36`	Sandlot Obs. in Kansas, 3 in MPECs 2009-S91 & 2009-S94 -- 2009 SF2, 2009 SB100, 2009 OP9
`204`	Schiaparelli Obs. in Italy, 5 in MPEC 2009-S91 -- 2009 SW17, 2009 SN, 2009 SK15, 2009 SJ15, 2005 EF
`D21`	Shenton Park Obs. in Western Australia, 13 in MPEC 2009-S91 -- 2009 SW19, 2009 SP, 2009 SM, 2009 SJ15, 2009 SH2, 2009 SG2, 2009 RH, 2009 RD4, 2009 RB4, 2009 RA4, 2009 QD34, 2009 OP9, 2009 FU4
`E12`	Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2009-S91 & 2009-S93 -- 2009 SW17, 2009 SL2, 2009 SH2, 2009 SG2, 2009 SA100, 2005 SG19
`510`	Siegen Obs. in Germany, 1 in MPEC 2009-S91 -- 433
`691`	Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2009-S91 -- 2009 RZ3, 2009 RV1, 2005 YX128, 55408, 144922
`291`	Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2009-S91 & 2009-S92 -- 2009 SZ99, 2009 SW1, 2009 SV17, 2009 SG18, 2009 SC2, 2009 SC15, 2009 RU1, 2009 QF34, 2009 PH, 2005 UM5, 2003 SY17, 162998
`I19`	Tanti Obs. in Argentina, 3 in MPECs 2009-S91 & 2009-S93 -- 2009 SA100, 2009 FU4, 3552
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-S96 -- P/2009 S1
`C00`	Velikie Luki Obs. in Russia, 2 in MPEC 2009-S91 -- 2009 KC3, 17274

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 25 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 SZ99	JPL Sentry	1506	2056-2101	5	9.3e-09	-4.52	-4.87	0	JPL: "Analysis based on 19 observations spanning 3.0023 days (2009-Sep-22.10556 to 2009-Sep-25.10786)." Diameter approximately 0.710 km. from mean, weighted H=18.4.

2009 SO98	JPL Sentry	1320	R E M O V E D						JPL: Risk listing removed at 0931 UTC.

2009 SM98	NEODyS	1321	2048-2056	3	2.59e-06	-4.08	-4.33	0	NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2009/09/24.245 to 2009/09/24.968."
2009 SM98	JPL Sentry	1320	2055-2108	10	3.2e-06	-4.02	-4.32	0	JPL: "Analysis based on 23 observations spanning .72297 days (2009-Sep-24.24446 to 2009-Sep-24.96743)." Diameter approximately 0.120 km. from mean, weighted H=22.3.

2009 SW19	NEODyS	1321	2026-2086	30	4.57e-08	-4.03	-4.56	0	NEODyS: "Based on 28 optical observations (of which 2 are rejected as outliers) from 2009/09/23.185 to 2009/09/25.123."
2009 SW19	JPL Sentry	1320	2026-2105	32	2.9e-08	-4.29	-4.82	0	JPL: "Analysis based on 27 observations spanning 1.9384 days (2009-Sep-23.18426 to 2009-Sep-25.12264)." Diameter approximately 0.389 km. from mean, weighted H=19.7.

2009 SG18	NEODyS	1321	2019-2090	42	3.22e-07	-2.12	-2.47	0	NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/09/21.172 to 2009/09/24.867."
2009 SG18	JPL Sentry	1320	2019-2095	34	3.8e-07	-2.06	-2.40	0	JPL: "Analysis based on 25 observations spanning 3.6952 days (2009-Sep-21.17145 to 2009-Sep-24.86668)." Diameter approximately 0.904 km. from mean, weighted H=17.9.

2009 SH2	JPL Sentry	1320	2095-2101	6	1.9e-05	-5.00	-5.15	0	JPL: "Analysis based on 35 observations spanning 6.3654 days (2009-Sep-18.76541 to 2009-Sep-25.13082)." Diameter approximately 0.040 km. from mean, weighted H=24.6.

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 25 September '09

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

2358	Grabbed MPEC 2009-S97 - 2003 QA112 - see above
2132	Grabbed MPEC 2009-S96 - Comet P/2009 S1 (Gibbs) - see above
1506	Noted that JPL Sentry has posted 2009 SZ99 as an impact risk - see above
1438	Grabbed MPEC 2009-S94 - 2009 SB100 - see above Grabbed MPEC 2009-S95 - 2009 SC100 - see above
1409	Grabbed MPEC 2009-S93 - 2009 SA100 - see above
1321	Noted that NEODyS has updated its 2009 SG18 risk assessment - see above Noted that NEODyS has updated its 2009 SW19 risk assessment - see above Grabbed MPEC 2009-S91 - Daily Orbit Update - see above Grabbed MPEC 2009-S92 - 2009 SZ99 - see above
1320	Noted that JPL Sentry 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 SM98 risk assessment - see above Noted that NEODyS has posted 2009 SM98 as an impact risk - see above Noted that JPL Sentry has removed 2009 SO98 as an impact risk - see above Noted that JPL Sentry has updated its 2009 SW19 risk assessment - see above

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