2009-10-26 Tracking News

Contents on 26 October '09

IAU Minor Planet Center
- NEOCP Activity -- eight listings: 1 new, 7 updated
- New MPECs -- four MPECs
Observers -- 20 observing facilities
Impact Risk Monitoring -- three 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
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 26 October '09

The MPC's NEO Confirmation Page has 8 listings: 1 new, 7 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and seven updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of fourteen 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 26 October '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-U102 time-stamped "03:03 UT" - Comet C/2009 S3 (Lemmon) - see below
MPEC 2009-U103 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2009-U104 time-stamped "18:18 UT" - 2009 UK20 - see below
MPEC 2009-U105 time-stamped "18:41 UT" - 2009 UL20

MPEC 2009-U105 - "18:41 UT" - 2009 UL20

K09U20L 2009 UL20 (risk-listed, H=23.8 ~59m) was discovered at 0538 UT on 25 Oct. by the Mt. Lemmon Survey (MLS), which observed it at Oct. 25.23-26p4 and 25.37-39p8. The discovery was confirmed by the Spacewatch 1.8m telescope (Oct. 26.17-18p3) and Magdalena Ridge Obs. (MRO) (Oct. 26.20-21p5).

MPEC 2009-U104 - "18:18 UT" - 2009 UK20

K09U20K 2009 UK20 (small asteroid, Earth MOID=2.3 LD, H=26.5 ~17m) was discovered at 0501 UT on 25 Oct. by the Spacewatch 0.9m telescope, which observed it at Oct. 25.21-25p3. The discovery was confirmed by Spacewatch 1.8m (Oct. 25.43-44p3 at V=22.1, 26.14-15p3 at V=20.8-21.1 & 26.42-43p3 at V=21.2-3) and MRO (Oct. 26.31-33p4). This object will be coming within ten lunar distances (LD) of Earth, reaching 6.6 LD on 13 Nov.

<< DOU on 26 Oct. '09 >> MPEC 2009-U103 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K09U18W 2009 UW18 (arc=2 days, H=19.7 ~389m) from MRO (Oct. 25.36-38p4) and Spacewatch 1.8m (Oct. 25.47-48p3)
K09U18V 2009 UV18 (arc=4 days, H=15.7 ~2.45 km, q=1.085 AU) from MLS (Oct. 24.45-48p4), MRO (Oct. 25.38-39p4), Cordell-Lorenz Obs. (Oct. 25.41-44p9), Petit Jean Mtn. South Obs. (PJMSO) (Oct. 25.43-44p13), Tenagra II Obs. (Oct. 25.45p3), Schiaparelli Obs. (Oct. 26.09p2 & 26.14-15p2), and Great Shefford Obs. (Oct. 26.10-11p3)
Observations of recently (no longer) risk-listed objects
K09U02D 2009 UD2 (small asteroid, arc=8 days, H=22.2 ~123m) from MLS (Oct. 25.14-16p4) and Spacewatch 1.8m (Oct. 26.08-09p3)
K09U00K 2009 UK (arc=8 days, H=19.9 ~355m) from MLS (Oct. 24.25-27p4)
K09T10G 2009 TG10 (i=41.0°, arc=11 days, H=17.4 ~1.12 km) from Spacewatch 1.8m (Oct. 26.20p3)
K09SM9C 2009 SC229 (arc=26 days, H=19.2 ~490m) from Desert Moon Obs. (Oct. 25.31-34p3)
Observations of small asteroids (H>22.0)
K09U19Z 2009 UZ19 (arc=1 day, H=26.1 ~20m) from Libbiano Obs. (Oct. 25.96p5) and Great Shefford Obs. (Oct. 26.03p3)
K09U19Y 2009 UY19 (arc=1 day, H=23.4 ~71m) from Schiaparelli Obs. (Oct. 25.94-95p5), Mandi Obs. (Oct. 25.95-96p6), and Great Shefford Obs. (Oct. 26.11-12p3)
K09U19T 2009 UT19 (q=0.292 AU, arc=2 days, H=22.6 ~102m) from Spacewatch 1.8m (Oct. 26.09-10p2)
K09U19S 2009 US19 (arc=2 days, H=23.4 ~71m) from Libbiano Obs. (Oct. 25.91-93p3)
K09U19D 2009 UD19 (arc=1 day, H=23.6 ~65m) from Astronomical Research Obs. (ARO) (Oct. 25.18-19p3) and the Catalina Sky Survey (CSS) (Oct. 25.38-40p4)
K09U19C 2009 UC19 (arc=1 day, H=25.0 ~34m) from ARO (Oct. 25.12-13p3)
K09U05R 2009 UR5 (arc=4 days, H=25.7 ~25m) from Tenagra II Obs. (Oct. 25.47-48p3)
K09U05Q 2009 UQ5 (arc=4 days, H=24.6 ~41m) from Spacewatch 0.9m (Oct. 25.15-18p3)
K09U03O 2009 UO3 (arc=5 days, H=23.0 ~85m) from Castelmartini Obs. (Oct. 24.88p3) and ARO (Oct. 25.01p4)
K09U00L 2009 UL (arc=10 days, H=22.2 ~123m) from Spacewatch 1.8m (Oct. 25.22-23p3 & 26.19p2)
K09U00F 2009 UF (arc=10 days, H=22.5 ~107m) from Spacewatch 1.8m (Oct. 26.12-13p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09R01V 2009 RV1 (Q=4.423 AU, arc=43 days, H=21.9 ~141m) from Spacewatch 1.8m (Oct. 25.51p3)
Observations of other objects
K09U17X 2009 UX17 (arc=3 days, H=21.4 ~178m) from Cordell-Lorenz Obs. (Oct. 25.20-26p3)
K09U14J 2009 UJ14 (i=59.5°, Q=5.415 AU, arc=5 days, H=20.5 ~269m) from Spacewatch 1.8m (Oct. 26.21-22p3)
K09U05P 2009 UP5 (arc=6 days, H=19.4 ~446m) from ARO (Oct. 24.99-00p3) and Alter Satzberg Obs. (Oct. 25.75-78p3)
K09U01P 2009 UP1 (arc=8 days, H=20.3 ~295m) from CSS (Oct. 25.11-12p4) and Alter Satzberg Obs. (Oct. 25.71-74p4)
K09T08K 2009 TK8 (arc=11 days, H=20.2 ~309m) from La Sagra Obs. (Oct. 25.98-00p6)
K09T04L 2009 TL4 (arc=10 days, H=21.6 ~162m) from Spacewatch 0.9m (Oct. 24.09-14p3)
K09T01A 2009 TA1 (arc=26 days, H=20.1 ~323m) from LINEAR (Oct. 25.29-35p4)
K09R00N 2009 RN (Q=4.583 AU, arc=45 days, H=19.9 ~355m) from La Sagra Obs. (Oct. 26.01-02p4)
K09N00A 2009 NA (Q=4.129 AU, arc=112 days, H=17.5 ~1.07 km) from Velikie Luki Obs. (Oct. 20.85-86p2)
K09K07M 2009 KM7 (arc=3 opp, H=17.7 ~977m) from CSS (Oct. 24.31-34p4 & 25.38-40p4)
K07D41A 2007 DA41 (arc=4 opp, H=17.5 ~1.07 km) from CSS (Oct. 24.28-30p4) and Spacewatch 0.9m (Oct. 24.35-39p3)
K05U01K 2005 UK1 (Q=4.237 AU, arc=3 opp, H=18.0 ~851m) from Spacewatch 0.9m (Oct. 24.21-25p3)
K05R06Q 2005 RQ6 (arc=2 opp, H=18.8 ~589m) from MLS (Oct. 25.27-29p4)
K01U16W 2001 UW16 (i=37.6°, arc=3 opp, H=19.6 ~407m) from Spacewatch 0.9m (Oct. 24.35-39p3) and CSS (Oct. 25.38-40p4)
K00CA1O 2000 CO101 (arc=2 opp, H=19.0 ~537m) from CSS (Oct. 25.11-12p4)
K00A93X 2000 AX93 (arc=5 opp, H=17.5 ~1.07 km) from Spacewatch 1.8m (Oct. 25.52-53p3 at V=21.3-22.7)
L7683 217683 1999 RP36 from CSS (Oct. 25.25-26p4)
L6689 216689 2004 HM1 from CSS (Oct. 24.32-35p4 & 25.38-40p4)
G2038 162038 1996 DH from Spacewatch 0.9m (Oct. 24.47-49p3)
F4244 154244 2002 KL6 from Spacewatch 0.9m (Oct. 24.21-24p3)
E3678 143678 2003 SA224 from CSS (Oct. 24.23-26p4) and Castelmartini Obs. (Oct. 24.91p3)
E3487 143487 2003 CR20 from LINEAR (Oct. 25.24-28p4)
99248 99248 2001 KY66 from CSS (Oct. 24.48-50p4)
54401 54401 2000 LM from Castelmartini Obs. (Oct. 24.89-90p3)
17511 17511 1992 QN from Castelmartini Obs. (Oct. 24.87p3)
17274 17274 2000 LC16 from CSS (Oct. 24.20-22p4) and Castelmartini Obs. (Oct. 24.85-86p3)
16834 16834 1997 WU22 from Castelmartini Obs. (Oct. 24.83p3)
08201 8201 1994 AH2 from MLS (Oct. 25.39-41p4)
06239 6239 Minos (1989 QF) from CSS (Oct. 24.36-39p4)
05693 5693 1993 EA from CSS (Oct. 24.51-52p4)
05653 5653 Camarillo (1992 WD5) from CSS (Oct. 24.49-50p4)
03988 3988 1986 LA from LINEAR (Oct. 25.09-13p4)
03552 3552 Don Quixote (1983 SA) from Tucci Obs. (Oct. 24.79p3)
03361 3361 Orpheus (1982 HR) from Castelmartini Obs. (Oct. 24.92p3)
01943 1943 Anteros (1973 EC) from LINEAR (Oct. 25.17-21p3)
01865 1865 Cerberus (1971 UA) from CSS (Oct. 24.16-18p3)
01862 1862 Apollo (1932 HA) from Spacewatch 0.9m (Oct. 24.47-50p3)

MPEC 2009-U102 - "03:03 UT" - Comet C/2009 S3 (Lemmon)

CK09S030 C/2009 S3 (Lemmon) (i=60.4°, q=6.481 AU, TP=2011 Dec. 10.343 TT) from Schiaparelli Obs. (Oct. 10.79p1) and MLS (Oct. 25.13-14p2)

Observers on 26 October '09

A total of 20 observing facilities appear in today's MPECs.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 2 in MPEC 2009-U103 -- 2009 UP5, 2009 UP1
`H55`	Astronomical Research Obs. (ARO) in Illinois, 4 in MPEC 2009-U103 -- 2009 UP5, 2009 UO3, 2009 UD19, 2009 UC19
`160`	Castelmartini Obs. in Italy, 7 in MPEC 2009-U103 -- 2009 UO3, 54401, 17511, 17274, 16834, 143678, 3361
`703`	Catalina Sky Survey (CSS) in Arizona, 15 in MPEC 2009-U103 -- 2009 UP1, 2009 UD19, 2009 KM7, 2007 DA41, 2001 UW16, 2000 CO101, 99248, 217683, 216689, 17274, 143678, 6239, 5693, 5653, 1865
`850`	Cordell-Lorenz Obs. in Tennessee, 2 in MPEC 2009-U103 -- 2009 UX17, 2009 UV18
`448`	Desert Moon Obs. in New Mexico, 1 in MPEC 2009-U103 -- 2009 SC229
`J95`	Great Shefford Obs. in England, 3 in MPEC 2009-U103 -- 2009 UZ19, 2009 UY19, 2009 UV18
`704`	LINEAR in New Mexico, 4 in MPEC 2009-U103 -- 2009 TA1, 143487, 3988, 1943
`J75`	La Sagra Obs. in Spain, 2 in MPEC 2009-U103 -- 2009 TK8, 2009 RN
`B33`	Libbiano Obs. in Italy, 2 in MPEC 2009-U103 -- 2009 UZ19, 2009 US19
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-U103, 2009-U104 & 2009-U105 -- 2009 UW18, 2009 UV18, 2009 UL20, 2009 UK20
`B28`	Mandi Obs. in Italy, 1 in MPEC 2009-U103 -- 2009 UY19
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-U102, 2009-U103 & 2009-U105 -- 2009 UV18, 2009 UL20, 2009 UK, 2009 UD2, C/2009 S3, 2005 RQ6, 8201
`H45`	Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2009-U103 -- 2009 UV18
`204`	Schiaparelli Obs. in Italy, 3 in MPECs 2009-U102 & 2009-U103 -- 2009 UY19, 2009 UV18, C/2009 S3
`691`	Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2009-U103 & 2009-U104 -- 2009 UQ5, 2009 UK20, 2009 TL4, 2007 DA41, 2005 UK1, 2001 UW16, 162038, 154244, 1862
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2009-U103, 2009-U104 & 2009-U105 -- 2009 UW18, 2009 UT19, 2009 UL20, 2009 UL, 2009 UK20, 2009 UJ14, 2009 UF, 2009 UD2, 2009 TG10, 2009 RV1, 2000 AX93
`926`	Tenagra II Obs. in Arizona, 2 in MPEC 2009-U103 -- 2009 UV18, 2009 UR5
`J35`	Tucci Obs. in Spain, 1 in MPEC 2009-U103 -- 3552
`C00`	Velikie Luki Obs. in Russia, 1 in MPEC 2009-U103 -- 2009 NA

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

Impact Risk Monitoring on 26 October '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 UL20	JPL Sentry	2358	2057-2107	19	2.6e-08	-7.27	-8.09	0	JPL: "Analysis based on 20 observations spanning .97806 days (2009-Oct-25.23483 to 2009-Oct-26.21289)." Diameter approximately 0.054 km. from mean, weighted H=24.0.

2009 UW18	JPL Sentry	1347	R E M O V E D						JPL: Risk listing removed at 0852 UTC.
2009 UW18	NEODyS	1347	R E M O V E D						-

2009 UV18	JPL Sentry	1347	2020-2100	8	2.1e-09	-4.07	-4.47	0	JPL: "Analysis based on 76 observations spanning 3.7490 days (2009-Oct-22.39951 to 2009-Oct-26.14849)." Diameter approximately 2.000 km. from mean, weighted H=16.1.
2009 UV18	NEODyS	1347	R 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 26 October '09

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

2358	Noted that JPL Sentry has posted 2009 UL20 as an impact risk - see above
1900	Grabbed MPEC 2009-U104 - 2009 UK20 - see above Grabbed MPEC 2009-U105 - 2009 UL20 - see above
1348	Grabbed MPEC 2009-U103 - Daily Orbit Update - see above
1347	Noted that JPL Sentry has updated its 2009 UV18 risk assessment - see above Noted that NEODyS has removed 2009 UV18 as an impact risk - see above Noted that JPL Sentry has removed 2009 UW18 as an impact risk - see above Noted that NEODyS has removed 2009 UW18 as an impact risk - see above
0416	Grabbed MPEC 2009-U102 - Comet C/2009 S3 (Lemmon) - see above

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