2009-02-03 Tracking News

Contents on 3 February '09

IAU Minor Planet Center
- NEOCP Activity -- 21 listings: 12 new, 9 updated
- New MPECs -- nine MPECs
Observers -- seventeen observing facilities
Impact Risk Monitoring -- seven 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 3 February '09

The MPC's NEO Confirmation Page has 21 listings: 12 new, 9 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve new and nine updated listings. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 34 objects listed 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 3 February '09

Minor Planet Electronic Circulars

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

MPEC 2009-C20 time-stamped "07:07 UT" - Daily Orbit Update - see below
MPEC 2009-C21 time-stamped "14:27 UT" - 2009 CP - see below
MPEC 2009-C22 time-stamped "14:30 UT" - 2009 CQ - see below
MPEC 2009-C23 time-stamped "14:33 UT" - 2009 CR - see below
MPEC 2009-C24 time-stamped "14:35 UT" - 2009 CS - see below
MPEC 2009-C25 time-stamped "14:38 UT" - 2009 CT - see below
MPEC 2009-C26 time-stamped "14:41 UT" - 2009 CU - see below
MPEC 2009-C27 time-stamped "14:44 UT" - 2009 CV - see below
MPEC 2009-C28 time-stamped "20:55 UT" - 2009 CZ

MPEC 2009-C28 - "20:55 UT" - 2009 CZ

K09C00Z 2009 CZ (risk-listed, H=17.9 ~891m) was discovered at 0540 UT on 3 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 3.24-29p7. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Feb. 3.29-32p3), Jim Young via Table Mtn. Obs. (Feb. 3.33-34p4), and Starkenburg Obs. (Feb. 3.82-85p2).

MPEC 2009-C27 - "14:44 UT" - 2009 CV

K09C00V 2009 CV (risk-listed, Earth MOID=4.7 LD, H=24.4 ~45m) was discovered at 2158 UT on 2 Feb. by Wildberg Obs., which observed it at Feb. 2.92-01p10 and 3.07-09p6. The discovery was confirmed by Tzec Maun Obs. Mayhill (Feb. 3.38-39p5), the Mt. Lemmon Survey (MLS) (Feb. 3.45-46p3), Ernesto Guido via RAS Obs. Mayhill (Feb. 3.46-47p3), and Young/Table Mtn. (Feb. 3.54-55p4). This object will be coming within ten lunar distances (LD) of Earth, reaching 4.8 LD on 24 Feb.

MPEC 2009-C26 - "14:41 UT" - 2009 CU

K09C00U 2009 CU (small asteroid, H=24.3 ~47m) was discovered at 1137 UT on 2 Feb. by CSS, which observed it at Feb. 2.48-50p4. The discovery was confirmed by MLS (Feb. 3.47-49p3 & 3.55p3) and Tenagra II Obs. (Feb. 3.51-52p3).

MPEC 2009-C25 - "14:38 UT" - 2009 CT

K09C00T 2009 CT (risk-listed, H=19.7 ~389m) was discovered at 1133 UT on 2 Feb. by CSS, which observed it at Feb. 2.48-50p4. The discovery was confirmed by Tenagra II Obs. (Feb. 3.45p3) and MLS (Feb. 3.47-49p4 & 3.55p4).

MPEC 2009-C24 - "14:35 UT" - 2009 CS

K09C00S 2009 CS (risk-listed, Q=5.274 AU, H=19.2 ~490m) was discovered at 0953 UT on 2 Feb. by CSS, which observed it at Feb. 2.41-43p3. The discovery was confirmed by Paul Camilleri via RAS Obs. Mayhill (Feb. 3.42-43p2), MLS (Feb. 3.42-44p4), and Young/Table Mtn. (Feb. 3.46-47p4).

MPEC 2009-C23 - "14:33 UT" - 2009 CR

K09C00R 2009 CR (small asteroid, H=25.7 ~25m) was discovered at 0601 UT on 2 Feb. by MLS, which observed it at Feb. 2.25-27p4 at V=21.1-22.6, 2.38p3 at V=21.5-22.3, and 3.27-28p4 at V=21.5-21.9. The discovery was confirmed by the Spacewatch 1.8m telescope (Feb. 3.16-17p3) and MRO (Feb. 3.21-24p3).

MPEC 2009-C22 - "14:30 UT" - 2009 CQ

K09C00Q 2009 CQ (small asteroid, Earth MOID=8.9 LD, H=26.7 ~15m) was discovered at 0558 UT on 2 Feb. by MLS, which observed it at Feb. 2.25-29p8 and 3.28-34p8. The discovery was confirmed by MRO (Feb. 3.33-35p3).

MPEC 2009-C21 - "14:27 UT" - 2009 CP

K09C00P 2009 CP (small asteroid, Earth MOID=7.1 LD, H=26.7 ~15m) was discovered at 0527 UT on 2 Feb. by MLS, which observed it at Feb. 2.23-27p8, 2.37-38p2, and 3.22-24p4. The discovery was confirmed by MRO (Feb. 2.36-38p3 & 3.17-18p4), Astronomical Research Obs. (ARO) (Feb. 3.10p3), Tenagra II Obs. (Feb. 3.27p3), and Young/Table Mtn. (Feb. 3.35-37p4). This object will be coming within ten lunar distances (LD) of Earth, reaching 7.7 LD on 8 Feb.

<< DOU on 3 Feb. '09 >> MPEC 2009-C20 - "07:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K09B81F 2009 BF81 (small asteroid, arc=2 days, H=25.2 ~31m) from ARO (Feb. 2.31-32p3)
K09B58F 2009 BF58 (small asteroid, arc=6 days, H=27.3 ~12m) from Spacewatch 1.8m (Feb. 3.26-27p3)
Observations of recently (no longer) risk-listed objects
K09A15M 2009 AM15 (arc=27 days, H=18.6 ~645m) from the Siding Spring Survey (SSS) (Feb. 2.51-52p3)
K09A00V 2009 AV (i=45.9°, arc=31 days, H=18.1 ~812m) from Spacewatch 1.8m (Feb. 2.52-53p3)
Observations of small asteroids (H>22.0)
K09C00G 2009 CG (arc=1 day, H=22.9 ~89m) from ARO (Feb. 2.36-37p3)
K09B81G 2009 BG81 (arc=2 days, H=27.9 ~9m) from ARO (Feb. 2.33-34p3)
K09B58M 2009 BM58 (Q=4.032 AU, arc=4 days, H=24.2 ~49m) from ARO (Feb. 2.38-39p3)
K09B58H 2009 BH58 (arc=5 days, H=23.5 ~68m) from ARO (Feb. 2.47-48p3)
K09B58G 2009 BG58 (arc=5 days, H=26.0 ~21m) from ARO (Feb. 2.42-44p3)
K09B58D 2009 BD58 (arc=15 days, H=22.2 ~123m) from Cegep de Trois-Rivieres Obs. (Jan. 28.08p3) and LINEAR (Feb. 2.27-32p5)
Observations of almost-small asteroids (21.7<H<=22.0)
K09B58O 2009 BO58 (arc=4 days, H=21.8 ~148m) from ARO (Feb. 2.39p6)
Observations of other objects
K09B81J 2009 BJ81 (arc=2 days, H=18.4 ~708m) from ARO (Feb. 2.48p3)
K09B81H 2009 BH81 (i=45.3°, arc=2 days, H=19.4 ~446m) from ARO (Feb. 2.35-37p3)
K09B77D 2009 BD77 (arc=3 days, H=20.5 ~269m) from ARO (Feb. 2.49p3)
K09B58P 2009 BP58 (arc=4 days, H=18.5 ~676m) from LINEAR (Feb. 2.36-38p3) and ARO (Feb. 2.40-41p3)
K09B58E 2009 BE58 (arc=6 days, H=21.6 ~162m) from ARO (Feb. 2.41p4) and CSS (Feb. 2.45-47p4)
K09B11B 2009 BB11 (arc=8 days, H=19.4 ~446m) from ARO (Feb. 2.45p3)
K09B02M 2009 BM2 (Q=4.289 AU, arc=15 days, H=19.8 ~371m) from LINEAR (Feb. 2.28-33p5)
K09B02L 2009 BL2 (arc=16 days, H=19.2 ~490m) from Guidestar Obs. (Feb. 2.80-82p3)
K09A16H 2009 AH16 (arc=18 days, H=17.6 ~1.02 km) from ARO (Feb. 2.46-47p4)
K08YE8V 2008 YV148 (arc=43 days, H=20.5 ~269m) from LINEAR (Feb. 2.27-29p3)
K08Y27R 2008 YR27 (arc=57 days, H=18.1 ~812m) from LINEAR (Feb. 2.21-26p5)
K08X02E 2008 XE2 (arc=60 days, H=19.3 ~467m) from LINEAR (Feb. 2.27-32p5)
K08TF7E 2008 TE157 (Q=4.444 AU, arc=123 days, H=20.8 ~234m) from LINEAR (Feb. 2.15-20p5)
K08J00G 2008 JG (arc=2 opp, H=20.9 ~224m) from ARO (Jan. 31.39-42p3 at V=21.7-22.1 & Feb. 2.38-41p3 at V=21.7-22.2)
K08E32A 2008 EA32 (IEO, Q=0.804 AU, arc=2 opp, H=16.5 ~1.70 km) from CSS (Feb. 2.09-10p3)
K08CB6H 2008 CH116 (q=0.273 AU, arc=2 opp, H=18.9 ~562m) from LINEAR (Feb. 2.46-50p4)
K03Y01X 2003 YX1 (arc=2 opp, H=20.9 ~224m) from LINEAR (Feb. 2.33-38p5)
K01O84E 2001 OE84 (arc=3 opp, H=17.9 ~891m) from LINEAR (Feb. 2.27-32p4)
J99C08W 1999 CW8 (arc=3 opp, H=18.6 ~645m) from LINEAR (Feb. 2.27-31p5)
J8856 198856 2005 LR3 from LINEAR (Feb. 2.46-51p5)
J8752 198752 2005 EA60 from the Spacewatch 0.9m telescope (Feb. 2.35-38p3)
F3953 153953 2002 AD9 from LINEAR (Feb. 2.40-45p4)
E3381 143381 2003 BC21 from Eric Elst via La Silla (1993 July 19.19-22p3)
89830 89830 2002 CE from Spacewatch 0.9m (Feb. 2.51-53p3)
89355 89355 2001 VS78 from LINEAR (Feb. 2.16-21p5)
12711 12711 Tukmit (1991 BB) from B. Conklin via RAS Obs. Mayhill (Feb. 3.06-09p3)
01863 1863 Antinous (1948 EA) from LINEAR (Feb. 2.28-32p5)

Observers on 3 February '09

Seventeen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 16 in MPECs 2009-C20 & 2009-C21 -- 2009 CP, 2009 CG, 2009 BP58, 2009 BO58, 2009 BM58, 2009 BJ81, 2009 BH81, 2009 BH58, 2009 BG81, 2009 BG58, 2009 BF81, 2009 BE58, 2009 BD77, 2009 BB11, 2009 AH16, 2008 JG
`703`	Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-C20, 2009-C24, 2009-C25, 2009-C26 & 2009-C28 -- 2009 CZ, 2009 CU, 2009 CT, 2009 CS, 2009 BE58, 2008 EA32
`924`	Cegep de Trois-Rivieres Obs. in Quebec, 1 in MPEC 2009-C20 -- 2009 BD58
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2009-C20 -- 2009 BL2
`704`	LINEAR in New Mexico, 15 in MPEC 2009-C20 -- 2009 BP58, 2009 BM2, 2009 BD58, 2008 YV148, 2008 YR27, 2008 XE2, 2008 TE157, 2008 CH116, 2003 YX1, 2001 OE84, 1999 CW8, 89355, 198856, 153953, 1863
`8094`	Eric Elst via La Silla in Chile, 1 in MPEC 2009-C20 -- 143381
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-C21, 2009-C22, 2009-C23 & 2009-C28 -- 2009 CZ, 2009 CR, 2009 CQ, 2009 CP
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-C21, 2009-C22, 2009-C23, 2009-C24, 2009-C25, 2009-C26 & 2009-C27 -- 2009 CV, 2009 CU, 2009 CT, 2009 CS, 2009 CR, 2009 CQ, 2009 CP
`H06%`	Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-C27 -- 2009 CV
`H06[`	Paul Camilleri in New South Wales via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-C24 -- 2009 CS
`H06\`	B. Conklin via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-C20 -- 12711
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2009-C20 -- 2009 AM15
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-C20 -- 89830, 198752
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2009-C20 & 2009-C23 -- 2009 CR, 2009 BF58, 2009 AV
`611`	Starkenburg Obs. in Germany, 1 in MPEC 2009-C28 -- 2009 CZ
`6735`	Jim Young via Table Mtn. Obs. in southern California, 4 in MPECs 2009-C21, 2009-C24, 2009-C27 & 2009-C28 -- 2009 CZ, 2009 CV, 2009 CS, 2009 CP
`926`	Tenagra II Obs. in Arizona, 3 in MPECs 2009-C21, 2009-C25 & 2009-C26 -- 2009 CU, 2009 CT, 2009 CP
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-C27 -- 2009 CV
`198`	Wildberg Obs. in Germany, 1 in MPEC 2009-C27 -- 2009 CV

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

Impact Risk Monitoring on 3 February '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 CZ	JPL Sentry	2246	2016	1	2.8e-10	-4.35	-4.35	0	JPL: "Analysis based on 16 observations spanning .60826 days (2009-Feb-03.23678 to 2009-Feb-03.84504)." Diameter approximately 1.300 km. from mean, weighted H=17.1.

2009 CV	JPL Sentry	1758	2056-2105	15	1.7e-08	-7.93	-8.45	0	JPL: "Analysis based on 31 observations spanning .63955 days (2009-Feb-02.91531 to 2009-Feb-03.55486)." Diameter approximately 0.045 km. from mean, weighted H=24.4.

2009 CT	JPL Sentry	1758	2013-2079	15	2.6e-09	-5.09	-5.44	0	JPL: "Analysis based on 15 observations spanning 1.0710 days (2009-Feb-02.48186 to 2009-Feb-03.55282)." Diameter approximately 0.486 km. from mean, weighted H=19.2.

2009 CS	JPL Sentry	1758	2080	1	1.2e-10	-7.17	-7.17	0	JPL: "Analysis based on 13 observations spanning 1.0621 days (2009-Feb-02.41199 to 2009-Feb-03.47407)." Diameter approximately 0.530 km. from mean, weighted H=19.0.

2009 BF81	JPL Sentry	1442	2091	1	5.6e-06	-5.62	-5.62	0	JPL: "Analysis based on 33 observations spanning 2.2283 days (2009-Jan-31.24321 to 2009-Feb-02.47156)." Diameter approximately 0.031 km. from mean, weighted H=25.2.
2009 BF81	NEODyS	1442	2077	1	2.18e-09	-8.93	-8.93	0	NEODyS: "Based on 35 optical observations (of which 2 are rejected as outliers) from 2009/01/31.244 to 2009/02/02.472."

2009 BD81	NEODyS	1442	2025-2089	9	1.31e-07	-4.37	-4.57	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2009/01/31.102 to 2009/02/02.310."

2009 BF58	JPL Sentry	1442	2057-2109	57	3.2e-04	-4.94	-5.35	0	JPL: "Analysis based on 41 observations spanning 6.0032 days (2009-Jan-28.26267 to 2009-Feb-03.26586)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
2009 BF58	NEODyS	1442	2057-2090	29	2.1e-04	-5.08	-5.36	0	NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2009/01/28.263 to 2009/02/03.267."

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 3 February '09

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

2246	Noted that JPL Sentry has posted 2009 CZ as an impact risk - see above
2059	Grabbed MPEC 2009-C28 - 2009 CZ - see above
1758	Noted that JPL Sentry has posted 2009 CS as an impact risk - see above Noted that JPL Sentry has posted 2009 CT as an impact risk - see above Noted that JPL Sentry has posted 2009 CV as an impact risk - see above
1532	Grabbed MPEC 2009-C27 - 2009 CV - see above
1442	Noted that NEODyS has posted 2009 BD81 as an impact risk - see above Noted that JPL Sentry has updated its 2009 BF58 risk assessment - see above Noted that NEODyS has updated its 2009 BF58 risk assessment - see above Noted that JPL Sentry has updated its 2009 BF81 risk assessment - see above Noted that NEODyS has posted 2009 BF81 as an impact risk - see above Grabbed MPEC 2009-C20 - Daily Orbit Update - see above Grabbed MPEC 2009-C21 - 2009 CP - see above Grabbed MPEC 2009-C22 - 2009 CQ - see above Grabbed MPEC 2009-C23 - 2009 CR - see above Grabbed MPEC 2009-C24 - 2009 CS - see above Grabbed MPEC 2009-C25 - 2009 CT - see above Grabbed MPEC 2009-C26 - 2009 CU - see above

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