2009-02-27 Tracking News

Contents on 27 February '09

IAU Minor Planet Center
- NEOCP Activity -- five listings: 5 updated
- New MPECs -- nine MPECs
Observers -- 22 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 27 February '09

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. All of these were "one nighters." So far The Tracking News has counted a total of 21 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 27 February '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been nine MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-D67 time-stamped "00:52 UT" - 2009 DV42 - see below
MPEC 2009-D68 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2009-D69 time-stamped "15:45 UT" - 2009 DZ42 - see below
MPEC 2009-D70 time-stamped "15:48 UT" - 2009 DA43 - see below
MPEC 2009-D71 time-stamped "15:50 UT" - 2009 DB43 - see below
MPEC 2009-D72 time-stamped "15:53 UT" - 2009 DC43 - see below
MPEC 2009-D73 time-stamped "19:35 UT" - 2009 DS43 - see below
MPEC 2009-D74 time-stamped "19:40 UT" - 2009 DT43 - see below
MPEC 2009-D75 time-stamped "21:30 UT" - 2009 DV43

MPEC 2009-D75 - "21:30 UT" - 2009 DV43

K09D43V 2009 DV43 (risk-listed, Earth MOID=7.5 LD, H=23.7 ~62m) was discovered at 0703 UT on 27 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 27.29-32p3 and 27.39-42p11. The discovery was confirmed by Sabino Canyon Obs. (Feb. 27.44-45p3) and Saint-Barthelemy Obs. (Feb. 27.87-88p6). This object will be coming within ten lunar distances (LD) of Earth, reaching 8.4 LD on 10 March.

MPEC 2009-D74 - "19:40 UT" - 2009 DT43

K09D43T 2009 DT43 (risk-listed, Q=4.150 AU, Earth MOID=0.7 LD, H=26.7 ~15m) was discovered at 0957 UT on 27 Feb. by CSS, which observed it at Feb. 27.41-43p7 and 27.47-53p10. This object will be coming within ten lunar distances (LD) of Earth, reaching 3.5 LD on 28 Feb.

MPEC 2009-D73 - "19:35 UT" - 2009 DS43

K09D43S 2009 DS43 (risk-listed, Earth MOID=6.6 LD, H=25.7 ~25m) was discovered at 0757 UT on 27 Feb. by CSS, which observed it at Feb. 27.33-35p6, 27.39p4, and 27.46p3. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Feb. 27.38-39p4) and Sabino Canyon Obs. (Feb. 27.40-41p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 7.0 LD on 1 March.

MPEC 2009-D72 - "15:53 UT" - 2009 DC43

K09D43C 2009 DC43 (risk-listed, Earth MOID=0.0 LD, H=17.8 ~933m) was discovered at 1159 UT on 26 Feb. by CSS, which observed it at Feb. 26.50-54p12. The discovery was confirmed by Richard Miles via Faulkes Telescope North (Feb. 26.63-64p6), Engelhardt Obs. Zelenchukskaya Station (Feb. 27.01p2), Sormano Obs. (Feb. 27.07p3), Sabino Canyon Obs. (Feb. 27.34-35p3), MRO (Feb. 27.45-46p4), and the Spacewatch 1.8m telescope (Feb. 27.49-50p3).

MPEC 2009-D71 - "15:50 UT" - 2009 DB43

K09D43B 2009 DB43 (small asteroid, Earth MOID=3.7 LD, H=26.5 ~17m) was discovered at 0741 UT on 26 Feb. by the Mt. Lemmon Survey (MLS), which observed it at Feb. 26.32-33p4, 26.39-43p7, 27.31-33p6, and 27.37-39p3. The discovery was confirmed by Sormano Obs. (Feb. 26.96-97p2) and Spacewatch 1.8m (Feb. 27.44-46p3).

MPEC 2009-D70 - "15:48 UT" - 2009 DA43

K09D43A 2009 DA43 (small asteroid, H=24.6 ~41m) was discovered at 0712 UT on 26 Feb. by MLS, which observed it at Feb. 26.30-32p4, 26.39p4, and 26.47p3. The discovery was confirmed by Spacewatch 1.8m (Feb. 27.29-30p3) and MRO (Feb. 27.34-37p4).

MPEC 2009-D69 - "15:45 UT" - 2009 DZ42

K09D42Z 2009 DZ42 (risk-listed, H=19.6 ~407m) was discovered at 0305 UT on 26 Feb. by CSS, which observed it at Feb. 26.13-20p11 and 27.13p4. The discovery was confirmed by Grasslands Obs. (Feb. 26.20-21p4), MLS (Feb. 27.14-15p8), Spacewatch 1.8m (Feb. 27.15-16p2), MRO (Feb. 27.19-20p3), Hibiscus Obs. (Feb. 27.27-30p3), and Mt. John Obs. (Feb. 27.39p4).

<< DOU on 27 Feb. '09 >> MPEC 2009-D68 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K09D42V 2009 DV42 (arc=1 day, H=18.5 ~676m) from Sormano Obs. (Feb. 27.02-03p3)
K09D39H 2009 DH39 (i=53.5°, arc=1 day, H=18.6 ~645m) from the Siding Spring Survey (SSS) (Feb. 26.41p2) and Sormano Obs. (Feb. 26.87-88p3)
Observations of recently (no longer) risk-listed objects
K09D01M 2009 DM1 from Schiaparelli Obs. (Feb. 21.83-84p2)
K09D01F 2009 DF1 (arc=7 days, H=20.7 ~245m) from Desert Moon Obs. (Feb. 26.42-44p5)
K09C05Q 2009 CQ5 (arc=12 days, H=17.7 ~977m) from Desert Moon Obs. (Feb. 26.10-12p2)
K09C04R 2009 CR4 (arc=14 days, H=21.7 ~155m) from Spacewatch 1.8m (Feb. 27.23-24p3)
K09C00T 2009 CT (arc=24 days, H=19.5 ~426m) from SSS (Feb. 26.78p1)
Observations of small asteroids (H>22.0)
K09D40M 2009 DM40 (arc=0 days, H=26.8 ~15m) from Jim Young via Table Mtn. Obs. (Feb. 26.51-52p4)
K09D01O 2009 DO1 (arc=7 days, H=23.1 ~81m) from Spacewatch 1.8m (Feb. 26.33-34p3)
K09C01T 2009 CT1 (arc=23 days, H=24.3 ~47m) from Spacewatch 1.8m (Feb. 26.32-33p3)
K00C59K 2000 CK59 (arc=2 opp, H=24.1 ~51m) from Spacewatch 1.8m (Feb. 26.30-31p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09C05R 2009 CR5 (arc=13 days, H=22.0 ~135m) from Spacewatch 1.8m (Feb. 27.19-20p2)
K09C01W 2009 CW1 (arc=23 days, H=21.8 ~148m) from Desert Moon Obs. (Feb. 26.33-36p3)
Observations of other objects
K09D36R 2009 DR36 (arc=2 days, H=20.6 ~257m) from Young/Table Mtn. (Feb. 26.48-49p4)
K09D04Q 2009 DQ4 (arc=5 days, H=21.0 ~214m) from Schiaparelli Obs. (Feb. 24.07-08p3)
K09D04O 2009 DO4 (i=38.0°, Q=4.237 AU, arc=4 days, H=21.3 ~186m) from Schiaparelli Obs. (Feb. 22.10-11p5)
K09D01N 2009 DN1 (arc=5 days, H=20.2 ~309m) from Kanab Obs. (Feb. 20.18p1 & 20.23p1)
K09D00Z 2009 DZ (arc=9 days, H=21.4 ~178m) from Astronomical Research Obs. (ARO) (Feb. 26.03p3) and Sormano Obs. (Feb. 26.94p3)
K09C05T 2009 CT5 (q=0.278 AU, arc=11 days, H=18.7 ~616m) from ARO (Feb. 26.04-05p3) and LINEAR (Feb. 26.16-20p4)
K09C05S 2009 CS5 (arc=13 days, H=19.4 ~446m) from Spacewatch 1.8m (Feb. 27.22p2)
K09C02Z 2009 CZ2 (Q=4.063 AU, arc=22 days, H=19.1 ~513m) from ARO (Feb. 26.05-06p3)
K09C01S 2009 CS1 (arc=23 days, H=21.0 ~214m) from ARO (Feb. 26.07-08p3)
K09B81E 2009 BE81 (arc=27 days, H=21.0 ~214m) from Sormano Obs. (Feb. 26.99-00p3)
K09B77D 2009 BD77 (arc=27 days, H=20.4 ~282m) from LINEAR (Feb. 26.32-37p5)
K08Y02R 2008 YR2 (arc=67 days, H=18.9 ~562m) from LINEAR (Feb. 26.37-42p5)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.5 ~676m) from New Millennium Obs. (Dec. 20.88-93p4)
K08R98M 2008 RM98 (Q=4.198 AU, arc=172 days, H=20.6 ~257m) from CSS (Feb. 26.24-27p4)
K08M00Z 2008 MZ (Q=4.207 AU, arc=199 days, H=18.6 ~645m) from New Millennium Obs. (Dec. 20.98-03p6)
K07E26J 2007 EJ26 (arc=2 opp, H=18.4 ~708m) from Desert Moon Obs. (Feb. 26.27-30p3)
K06K01T 2006 KT1 (arc=4 opp, H=16.6 ~1.62 km) from the Spacewatch 0.9m telescope (Feb. 26.29-33p3)
K04M01Q 2004 MQ1 (Q=4.105 AU, arc=3 opp, H=18.0 ~851m) from Spacewatch 1.8m (Feb. 26.39-41p3 at V=21.8-22.9)
K02V94Y 2002 VY94 (Q=5.375 AU, arc=2 opp, H=16.8 ~1.48 km) from New Millennium Obs. (Dec. 20.97-02p6)
K01L05M 2001 LM5 (arc=3 opp, H=19.3 ~467m) from New Millennium Obs. (Dec. 20.96-00p6)
G2900 162900 2001 HG31 from New Millennium Obs. (Dec. 20.90-95p6)
F3306 153306 2001 JL1 from New Millennium Obs. (Dec. 20.97-00p3)
E2348 142348 2002 RX211 from New Millennium Obs. (Dec. 21.04p2)
E1765 141765 2002 MP3 from New Millennium Obs. (Dec. 21.05p2)
D7925 137925 2000 BJ19 from Zelenchukskaya Sta. (Feb. 26.77-79p5)
D6923 136923 1998 JH2 from New Millennium Obs. (Dec. 20.99-03p5)
D6617 136617 1994 CC from LINEAR (Feb. 26.38-41p4)
A8519 108519 2001 LF from SSS (Feb. 26.59-62p3)
19764 19764 2000 NF5 from MLS (Feb. 26.22-23p4)
12711 12711 Tukmit (1991 BB) from LINEAR (Feb. 26.15-19p5)
08567 8567 1996 HW1 from New Millennium Obs. (Dec. 20.90-94p6) and LINEAR (Feb. 26.15-17p3)
07753 7753 1988 XB from Spacewatch 0.9m (Feb. 26.30-34p3)
07358 7358 Oze (1995 YA3) from New Millennium Obs. (Dec. 21.05p2)
04596 4596 1981 QB from Crni Vrh Obs. (Feb. 25.91-95p3)
03200 3200 Phaethon (1983 TB) from New Millennium Obs. (Dec. 20.89-93p6)
03199 3199 Nefertiti (1982 RA) from LINEAR (Feb. 26.32-37p5)
01916 1916 Boreas (1953 RA) from New Millennium Obs. (Dec. 20.92-94p3)
01627 1627 Ivar (1929 SH) from New Millennium Obs. (Dec. 20.95-00p6)
01620 1620 Geographos (1951 RA) from New Millennium Obs. (Dec. 20.86-91p6)

MPEC 2009-D67 - "00:52 UT" - 2009 DV42

K09D42V 2009 DV42 (risk-listed, H=18.5 ~676m) was discovered at 1007 UT on 26 Feb. by CSS, which observed it at Feb. 26.42-45p3 and 26.49-52p3. The discovery was confirmed by Young/Table Mtn. (Feb. 26.56p1), Miles/Faulkes North (Feb. 26.63-64p7), and Zelenchukskaya Sta. (Feb. 26.97-99p5).

Observers on 27 February '09

A total of 22 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 4 in MPEC 2009-D68 -- 2009 DZ, 2009 CZ2, 2009 CT5, 2009 CS1
`703`	Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2009-D67, 2009-D68, 2009-D69, 2009-D72, 2009-D73, 2009-D74 & 2009-D75 -- 2009 DZ42, 2009 DV43, 2009 DV42, 2009 DT43, 2009 DS43, 2009 DC43, 2008 RM98
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2009-D68 -- 4596
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2009-D68 -- 2009 DF1, 2009 CW1, 2009 CQ5, 2007 EJ26
`114`	Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 3 in MPECs 2009-D67, 2009-D68 & 2009-D72 -- 2009 DV42, 2009 DC43, 137925
`F656`	Richard Miles in England via Faulkes Telescope North in Hawaii, 2 in MPECs 2009-D67 & 2009-D72 -- 2009 DV42, 2009 DC43
`651`	Grasslands Obs. in Arizona, 1 in MPEC 2009-D69 -- 2009 DZ42
`F84`	Hibiscus Obs. in Tahiti, 1 in MPEC 2009-D69 -- 2009 DZ42
`682`	Kanab Obs. in Utah, 1 in MPEC 2009-D68 -- 2009 DN1
`704`	LINEAR in New Mexico, 7 in MPEC 2009-D68 -- 2009 CT5, 2009 BD77, 2008 YR2, 136617, 12711, 8567, 3199
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-D69, 2009-D70, 2009-D72 & 2009-D73 -- 2009 DZ42, 2009 DS43, 2009 DC43, 2009 DA43
`474`	Mt. John Obs. in New Zealand, 1 in MPEC 2009-D69 -- 2009 DZ42
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2009-D68, 2009-D69, 2009-D70 & 2009-D71 -- 2009 DZ42, 2009 DB43, 2009 DA43, 19764
`A24`	New Millennium Obs. in Italy, 15 in MPEC 2009-D68 -- 2008 SQ1, 2008 MZ, 2002 VY94, 2001 LM5, 162900, 153306, 142348, 141765, 136923, 8567, 7358, 3200, 1916, 1627, 1620
`854`	Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-D72, 2009-D73 & 2009-D75 -- 2009 DV43, 2009 DS43, 2009 DC43
`B04`	Saint-Barthelemy Obs. in Italy, 1 in MPEC 2009-D75 -- 2009 DV43
`204`	Schiaparelli Obs. in Italy, 3 in MPEC 2009-D68 -- 2009 DQ4, 2009 DO4, 2009 DM1
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2009-D68 -- 2009 DH39, 2009 CT, 108519
`587`	Sormano Obs. in Italy, 6 in MPECs 2009-D68, 2009-D71 & 2009-D72 -- 2009 DZ, 2009 DV42, 2009 DH39, 2009 DC43, 2009 DB43, 2009 BE81
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-D68 -- 2006 KT1, 7753
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2009-D68, 2009-D69, 2009-D70, 2009-D71 & 2009-D72 -- 2009 DZ42, 2009 DO1, 2009 DC43, 2009 DB43, 2009 DA43, 2009 CT1, 2009 CS5, 2009 CR5, 2009 CR4, 2004 MQ1, 2000 CK59
`6735`	Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2009-D67 & 2009-D68 -- 2009 DV42, 2009 DR36, 2009 DM40

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

Impact Risk Monitoring on 27 February '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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 DV43	JPL Sentry	2258	2019-2093	17	4.7e-08	-6.21	-6.66	0	JPL: "Analysis based on 23 observations spanning .58851 days (2009-Feb-27.29421 to 2009-Feb-27.88272)." Diameter approximately 0.062 km. from mean, weighted H=23.7.

2009 DT43	JPL Sentry	2204	2044-2101	4	3.9e-06	-6.10	-6.13	0	JPL: "Analysis based on 17 observations spanning .11758 days (2009-Feb-27.41498 to 2009-Feb-27.53256)." Diameter approximately 0.015 km. from mean, weighted H=26.8.

2009 DS43	JPL Sentry	2204	2019-2106	59	3.2e-08	-7.35	-8.39	0	JPL: "Analysis based on 18 observations spanning .13134 days (2009-Feb-27.33154 to 2009-Feb-27.46288)." Diameter approximately 0.027 km. from mean, weighted H=25.5.

2009 DC43	JPL Sentry	1858	2016-2108	121	7.3e-08	-3.35	-4.08	0	JPL: "Analysis based on 33 observations spanning .99968 days (2009-Feb-26.49973 to 2009-Feb-27.49941)." Diameter approximately 0.940 km. from mean, weighted H=17.8.

2009 DZ42	JPL Sentry	1818	2027-2108	19	1.6e-07	-4.31	-4.74	0	JPL: "Analysis based on 39 observations spanning 1.2661 days (2009-Feb-26.12849 to 2009-Feb-27.39462)." Diameter approximately 0.410 km. from mean, weighted H=19.6.

2009 DV42	JPL Sentry	1508	2015-2104	79	5.4e-08	-3.90	-4.46	0	JPL #2 for the day: "Analysis based on 22 observations spanning .60486 days (2009-Feb-26.42181 to 2009-Feb-27.02667)." Diameter approximately 0.642 km. from mean, weighted H=18.6.
2009 DV42	NEODyS	1508	2015-2089	56	2.97e-08	-4.05	-4.48	0	NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2009/02/26.423 to 2009/02/27.027."

2009 DH39	JPL Sentry	1508	R E M O V E D						JPL: Risk listing removed at 0951 UTC.

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 27 February '09

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

2258	Noted that JPL Sentry has posted 2009 DV43 as an impact risk - see above
2204	Noted that JPL Sentry has posted 2009 DS43 as an impact risk - see above Noted that JPL Sentry has posted 2009 DT43 as an impact risk - see above Grabbed MPEC 2009-D75 - 2009 DV43 - see above
2003	Grabbed MPEC 2009-D73 - 2009 DS43 - see above Grabbed MPEC 2009-D74 - 2009 DT43 - see above
1858	Noted that JPL Sentry has posted 2009 DC43 as an impact risk - see above
1818	Noted that JPL Sentry has posted 2009 DZ42 as an impact risk - see above
1621	Grabbed MPEC 2009-D71 - 2009 DB43 - see above Grabbed MPEC 2009-D72 - 2009 DC43 - see above
1552	Grabbed MPEC 2009-D70 - 2009 DA43 - see above
1549	Grabbed MPEC 2009-D69 - 2009 DZ42 - see above
1508	Noted that JPL Sentry has removed 2009 DH39 as an impact risk - see above Noted that JPL Sentry has updated its 2009 DV42 risk assessment - see above Noted that NEODyS has posted 2009 DV42 as an impact risk - see above Grabbed MPEC 2009-D68 - Daily Orbit Update - see above
0337	Noted that JPL Sentry has posted 2009 DV42 as an impact risk - see above
0259	Grabbed MPEC 2009-D67 - 2009 DV42 - see above

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