2009-03-24 Tracking News

Contents on 24 March '09

IAU Minor Planet Center
- NEOCP Activity -- six listings: 3 new, 3 updated
- New MPECs -- seven MPECs
Observers -- 26 observing facilities
Impact Risk Monitoring -- eleven objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
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 24 March '09

The MPC's NEO Confirmation Page has 6 listings: 3 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of fifteen 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 by Birtwhistle et al. at Suno Observatory.

New MPECs on 24 March '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-F67 time-stamped "06:12 UT" - Daily Orbit Update - see below
MPEC 2009-F68 time-stamped "14:03 UT" - 2009 FS23 - see below
MPEC 2009-F69 time-stamped "14:08 UT" - 2009 FT23 - see below
MPEC 2009-F70 time-stamped "14:14 UT" - 2009 FU23 - see below
MPEC 2009-F71 time-stamped "14:18 UT" - 2009 FV23 - see below
MPEC 2009-F72 time-stamped "14:55 UT" - 2009 FW23 - see below
MPEC 2009-F73 time-stamped "20:22 UT" - 2009 FL25

MPEC 2009-F73 - "20:22 UT" - 2009 FL25

K09F25L 2009 FL25 (H=19.3 ~467m) was discovered at 0903 UT on 24 March by the Catalina Sky Survey (CSS), which observed it at March 24.38-40p4 and 24.46-49p4. The discovery was confirmed by Jim Young via Table Mtn. Obs. (March 24.42-44p4), Monte Baldo Obs. (March 24.81-82p6), and Farra d'Isonzo Obs. (March 24.81-82p3).

MPEC 2009-F72 - "14:55 UT" - 2009 FW23

K09F23W 2009 FW23 (i=86.5°, q=1.651 AU, Q=20.169 AU, H=15.1 ~3.23 km) was discovered at 1230 UT on 19 March by the Siding Spring Survey (SSS), which observed it at March 19.52-55p3, 19.67p1, 19.72-74p4, 20.49p1, 20.60p1, 20.74p1, 21.39p1, 21.72p1, and 22.57p3. The discovery was confirmed by Grove Creek Obs. (March 19.74-75p3 & 20.54-56p5), El Leoncito Obs. (March 20.07-10p5, 21.08-10p4 & 22.10-13p5), Sabino Canyon Obs. (March 21.26-27p2), Mt. John Obs. (March 21.52p4, 22.34p3 & 22.56p3), Young/Table Mtn. (March 22.22-25p6 & 24.22-26p4), and Cristovao Jacques via RAS Obs. Moorook (March 22.50-51p9 & 23.50p3).

MPEC 2009-F71 - "14:18 UT" - 2009 FV23

K09F23V 2009 FV23 (small asteroid, Earth MOID=7.7 LD, H=25.9 ~22m) was discovered at 0649 UT on 24 March by CSS, which observed it at March 24.28-31p7 and 24.41-45p4. The discovery was confirmed by Sabino Canyon Obs. (March 24.32-33p3) and Young/Table Mtn. (March 24.33-35p4). This object will be coming within ten lunar distances (LD) of Earth, reaching 8.2 LD on 28 March.

MPEC 2009-F70 - "14:14 UT" - 2009 FU23

K09F23U 2009 FU23 (H=20.1 ~323m) was discovered at 1038 UT on 23 March by CSS, which observed it at March 23.44-50p7. The discovery was confirmed by Great Shefford Obs. (March 23.84-86p4), Farra d'Isonzo Obs. (March 23.91-95p2), New Millennium Obs. (March 23.94-95p7), Celbridge Obs. (March 23.95p1), Raheny Obs. (March 23.99-01p3), Young/Table Mtn. (March 24.37-39p4), and Sabino Canyon Obs. (March 24.38-39p3).

MPEC 2009-F69 - "14:08 UT" - 2009 FT23

K09F23T 2009 FT23 (small asteroid, Earth MOID=4.6 LD, H=25.9 ~22m) was discovered at 0703 UT on 23 March by LINEAR, which observed it at March 23.29-33p4. The discovery was confirmed by Great Shefford Obs. (March 23.94p4), Raheny Obs. (March 24.04-06p4), Sabino Canyon Obs. (March 24.31p3), and Young/Table Mtn. (March 24.35-41p5). This object is now within ten lunar distances (LD) of Earth, reaching 4.9 LD on 25 March.

MPEC 2009-F68 - "14:03 UT" - 2009 FS23

K09F23S 2009 FS23 (small asteroid, H=25.4 ~28m) was discovered at 0546 UT on 23 March by LINEAR, which observed it at March 23.24-29p5. The discovery was confirmed by Great Shefford Obs. (March 23.95p3), Young/Table Mtn. (March 24.28-32p5), and Sabino Canyon Obs. (March 24.29-30p2).

<< DOU on 24 Mar. '09 >> MPEC 2009-F67 - "06:12 UT" - Daily Orbit Update

Observations of risk-listed objects
K09F04U 2009 FU4 (arc=45 days, H=17.8 ~933m) from the Mt. Lemmon Survey (MLS) (Feb. 5.32-34p4 & 5.50-52p4)
K09F01G 2009 FG1 (i=70.4°, arc=5 days, H=18.5 ~676m) from Astronomical Research Obs. (ARO) (March 22.28-29p3)
K09F00J 2009 FJ (small asteroid, arc=5 days, H=24.9 ~35m) from Schiaparelli Obs. (March 17.99-00p5) and ARO (March 22.29p4)
K09F00E 2009 FE (Q=4.089 AU, arc=6 days, H=21.3 ~186m) from ARO (March 22.37-38p4)
Observations of recently (no longer) risk-listed objects
K09D42V 2009 DV42 (arc=24 days, H=18.5 ~676m) from ARO (March 22.38-39p4)
K09D01F 2009 DF1 (arc=32 days, H=20.6 ~257m) from LINEAR (March 23.30-32p3)
Observations of small asteroids (H>22.0)
K09F05A 2009 FA5 (arc=3 days, H=26.0 ~21m) from ARO (March 22.33-34p3)
K09F04X 2009 FX4 (arc=3 days, H=25.4 ~28m) from ARO (March 22.41-42p6)
K09F00L 2009 FL (arc=3 days, H=24.4 ~45m) from Schiaparelli Obs. (March 18.02p3)
K09F00D 2009 FD (arc=28 days, H=22.2 ~123m) from Doc Greiner Research Obs. (DGRO) (March 22.16-18p16), ARO (March 22.42-43p4), Frasso Sabino Obs. (March 22.90p9), LINEAR (March 23.29-33p4), and Balzaretto Obs. (March 23.91-92p6)
K09E01C 2009 EC1 (arc=21 days, H=22.8 ~93m) from LINEAR (March 23.29-32p4)
Observations of other objects
K09F00T 2009 FT (arc=5 days, H=19.0 ~537m) from ARO (March 22.35-36p3)
K09F00A 2009 FA (i=42.4°, Q=4.094 AU, arc=7 days, H=18.6 ~645m) from DGRO (March 22.15-16p8)
K09B81E 2009 BE81 (arc=50 days, H=21.0 ~214m) from ARO (March 22.16-18p2)
K09B58P 2009 BP58 (arc=2 opp, H=18.7 ~616m) from CSS (March 23.26-27p2)
K08W60L 2008 WL60 (arc=120 days, H=18.0 ~851m) from CSS (March 23.37-38p4)
K08E82N 2008 EN82 (arc=6 opp, H=15.8 ~2.34 km, q=1.120 AU) from the Spacewatch 0.9m telescope (March 21.38-42p3)
K07B02T 2007 BT2 (arc=3 opp, H=17.2 ~1.23 km) from Frasso Sabino Obs. (March 22.91p6)
K04S26V 2004 SV26 (arc=2 opp, H=18.4 ~708m) from Spacewatch 0.9m (March 21.26-30p3)
K01F57Z 2001 FZ57 (q=0.374 AU, arc=5 opp, H=18.6 ~645m) from CSS (March 23.23-25p4)
K00F01L 2000 FL1 (i=43.6°, Q=4.177 AU, arc=2 opp, H=15.4 ~2.82 km, q=1.291 AU) from CSS (March 23.36-38p4)
J99F21J 1999 FJ21 (arc=2 opp, H=20.3 ~295m) from Monte Baldo Obs. (March 23.81-82p3) and Gnosca Obs. (March 23.83-84p2)
K7970 207970 1996 BZ3 from LINEAR (March 23.26-29p3)
G3760 163760 2003 OR14 from Spacewatch 0.9m (March 21.38-42p3)
F5336 155336 2006 GA1 from La Sagra Obs. (March 22.83-86p3)
E3651 143651 2003 QO104 from Sabadell Obs. (March 21.87-88p3)
E1432 141432 2002 CQ11 from LINEAR (March 23.29-33p4)
D7925 137925 2000 BJ19 from CSS (March 23.24-26p4)
99935 99935 2002 AV4 from La Sagra Obs. (March 22.90-98p6)
40329 40329 1999 ML from Spacewatch 0.9m (March 21.45-47p2)
22771 22771 1999 CU3 from Frasso Sabino Obs. (March 22.84-85p6)
08176 8176 1991 WA from CSS (March 23.36-38p4)
03554 3554 Amun (1986 EB) from CSS (March 23.21-23p4)
03199 3199 Nefertiti (1982 RA) from Boambee Obs. (March 23.40-41p2)
01036 1036 Ganymed (1924 TD) from Boambee Obs. (March 23.42-45p3)

Observers on 24 March '09

A total of 26 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 9 in MPEC 2009-F67 -- 2009 FX4, 2009 FT, 2009 FJ, 2009 FG1, 2009 FE, 2009 FD, 2009 FA5, 2009 DV42, 2009 BE81
`A81`	Balzaretto Obs. in Italy, 1 in MPEC 2009-F67 -- 2009 FD
`432`	Boambee Obs. in New South Wales, 2 in MPEC 2009-F67 -- 3199, 1036
`703`	Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2009-F67, 2009-F70, 2009-F71 & 2009-F73 -- 2009 FV23, 2009 FU23, 2009 FL25, 2009 BP58, 2008 WL60, 2001 FZ57, 2000 FL1, 137925, 8176, 3554
`J65`	Celbridge Obs. in Ireland, 1 in MPEC 2009-F70 -- 2009 FU23
`H26`	Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2009-F67 -- 2009 FD, 2009 FA
`808`	El Leoncito Obs. in Argentina, 1 in MPEC 2009-F72 -- 2009 FW23
`595`	Farra d'Isonzo Obs. in Italy, 2 in MPECs 2009-F70 & 2009-F73 -- 2009 FU23, 2009 FL25
`157`	Frasso Sabino Obs. in Italy, 3 in MPEC 2009-F67 -- 2009 FD, 2007 BT2, 22771
`143`	Gnosca Obs. in Switzerland, 1 in MPEC 2009-F67 -- 1999 FJ21
`J95`	Great Shefford Obs. in England, 3 in MPECs 2009-F68, 2009-F69 & 2009-F70 -- 2009 FU23, 2009 FT23, 2009 FS23
`E16`	Grove Creek Obs. in New South Wales, 1 in MPEC 2009-F72 -- 2009 FW23
`704`	LINEAR in New Mexico, 7 in MPECs 2009-F67, 2009-F68 & 2009-F69 -- 2009 FT23, 2009 FS23, 2009 FD, 2009 EC1, 2009 DF1, 207970, 141432
`J75`	La Sagra Obs. in Spain, 2 in MPEC 2009-F67 -- 99935, 155336
`A99`	Monte Baldo Obs. in Italy, 2 in MPECs 2009-F67 & 2009-F73 -- 2009 FL25, 1999 FJ21
`474`	Mt. John Obs. in New Zealand, 1 in MPEC 2009-F72 -- 2009 FW23
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-F67 -- 2009 FU4
`A24`	New Millennium Obs. in Italy, 1 in MPEC 2009-F70 -- 2009 FU23
`D90.`	Cristovao Jacques in Brazil via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-F72 -- 2009 FW23
`J41`	Raheny Obs. in Ireland, 2 in MPECs 2009-F69 & 2009-F70 -- 2009 FU23, 2009 FT23
`619`	Sabadell Obs. in Spain, 1 in MPEC 2009-F67 -- 143651
`854`	Sabino Canyon Obs. in Arizona, 5 in MPECs 2009-F68, 2009-F69, 2009-F70, 2009-F71 & 2009-F72 -- 2009 FW23, 2009 FV23, 2009 FU23, 2009 FT23, 2009 FS23
`204`	Schiaparelli Obs. in Italy, 2 in MPEC 2009-F67 -- 2009 FL, 2009 FJ
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2009-F72 -- 2009 FW23
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2009-F67 -- 2008 EN82, 2004 SV26, 40329, 163760
`6735`	Jim Young via Table Mtn. Obs. in southern California, 6 in MPECs 2009-F68, 2009-F69, 2009-F70, 2009-F71, 2009-F72 & 2009-F73 -- 2009 FW23, 2009 FV23, 2009 FU23, 2009 FT23, 2009 FS23, 2009 FL25

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

Impact Risk Monitoring on 24 March '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 FG19	NEODyS	1355	2009-2090	103	7.62e-08	-2.89	-3.75	0	NEODyS: "Based on 35 optical observations (of which 0 are rejected as outliers) from 2009/03/21.449 to 2009/03/23.315."
2009 FG19	JPL Sentry	0330	2018-2108	65	8.6e-08	-3.00	-3.62	0	JPL: "Analysis based on 35 observations spanning 1.8657 days (2009-Mar-21.44815 to 2009-Mar-23.31385)." Diameter approximately 0.827 km. from mean, weighted H=18.1.

2009 FZ10	JPL Sentry	0330	2108	2	3.7e-09	-8.92	-8.94	0	JPL: "Analysis based on 31 observations spanning .95054 days (2009-Mar-21.32461 to 2009-Mar-22.27515)." Diameter approximately 0.027 km. from mean, weighted H=25.5.

2009 FV4	JPL Sentry	0330	R E M O V E D						JPL: Risk listing removed at 0852 UTC 23 March.

2009 FU4	JPL Sentry	1355	R E M O V E D						JPL #2 for the day: Risk listing removed at 0949 UTC.

2009 FS4	JPL Sentry	0330	R E M O V E D						JPL: Risk listing removed at 0851 UTC 22 March.

2009 FG1	JPL Sentry	1355	2038-2094	4	1.6e-07	-2.82	-2.97	0	JPL #2 for the day: "Analysis based on 39 observations spanning 4.9819 days (2009-Mar-17.30415 to 2009-Mar-22.28606)." Diameter approximately 0.740 km. from mean, weighted H=18.3.
2009 FG1	NEODyS	1355	2038-2071	5	1.71e-07	-2.80	-2.95	0	NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2009/03/17.305 to 2009/03/22.287."

2009 FP	JPL Sentry	0330	R E M O V E D						JPL: Risk listing removed at 0852 UTC 22 March.

2009 FJ	JPL Sentry	1355	2058-2107	9	6.3e-05	-4.24	-4.27	0	JPL #2 for the day: "Analysis based on 98 observations spanning 4.9815 days (2009-Mar-17.30916 to 2009-Mar-22.29062)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
2009 FJ	NEODyS	1355	2058-2088	6	6.01e-05	-4.25	-4.27	0	NEODyS: "Based on 105 optical observations (of which 7 are rejected as outliers) from 2009/03/17.245 to 2009/03/22.291."

2009 FG	JPL Sentry	0330	2022-2107	30	7.5e-06	-5.55	-6.25	0	JPL: "Analysis based on 48 observations spanning 4.9675 days (2009-Mar-16.3986 to 2009-Mar-21.36612)." Diameter approximately 0.027 km. from mean, weighted H=25.5.

2009 FE	JPL Sentry	1355	2044-2103	2	6.0e-06	-3.41	-3.42	0	JPL #2 for the day: "Analysis based on 46 observations spanning 6.1000 days (2009-Mar-16.27919 to 2009-Mar-22.379154)." Diameter approximately 0.180 km. from mean, weighted H=21.4.
2009 FE	NEODyS	1355	2044	1	5.65e-06	-3.43	-3.43	0	NEODyS: "Based on 46 optical observations (of which 0 are rejected as outliers) from 2009/03/16.280 to 2009/03/22.380."

2009 DO111	JPL Sentry	0330	R E M O V E D						JPL: Risk listing removed at 0657 UTC 21 March.

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 24 March '09

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

2024	Grabbed MPEC 2009-F73 - 2009 FL25 - see above
1500	Grabbed MPEC 2009-F72 - 2009 FW23 - see above
1430	Grabbed MPEC 2009-F68 - 2009 FS23 - see above Grabbed MPEC 2009-F69 - 2009 FT23 - see above Grabbed MPEC 2009-F70 - 2009 FU23 - see above Grabbed MPEC 2009-F71 - 2009 FV23 - see above
1355	Noted that JPL Sentry has updated its 2009 FE risk assessment - see above Noted that NEODyS has updated its 2009 FE risk assessment - see above Noted that JPL Sentry has updated its 2009 FG1 risk assessment - see above Noted that NEODyS has updated its 2009 FG1 risk assessment - see above Noted that NEODyS has posted 2009 FG19 as an impact risk - see above Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above Noted that NEODyS has updated its 2009 FJ risk assessment - see above Noted that JPL Sentry has removed 2009 FU4 as an impact risk - see above Grabbed MPEC 2009-F67 - Daily Orbit Update - see above
0330	Noted that JPL Sentry has removed 2009 DO111 as an impact risk - see above Noted that JPL Sentry has updated its 2009 FE risk assessment - see above Noted that JPL Sentry has updated its 2009 FG risk assessment - see above Noted that JPL Sentry has updated its 2009 FG1 risk assessment - see above Noted that JPL Sentry has reposted 2009 FG19 as an impact risk - see above Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above Noted that JPL Sentry has removed 2009 FP as an impact risk - see above Noted that JPL Sentry has removed 2009 FS4 as an impact risk - see above Noted that JPL Sentry has updated its 2009 FU4 risk assessment - see above Noted that JPL Sentry has removed 2009 FV4 as an impact risk - see above Noted that JPL Sentry has reposted 2009 FZ10 as an impact risk - see above

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