2009-02-22 Tracking News

Contents on 22 February '09

IAU Minor Planet Center
- NEOCP Activity -- three listings: 3 updated
- New MPECs -- five MPECs
Observers -- 26 observing facilities
Impact Risk Monitoring -- four 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 22 February '09

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

When last checked at 2300 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of eight 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 22 February '09

Minor Planet Electronic Circulars

As of last check at 2300 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-D48 time-stamped "07:07 UT" - Daily Orbit Update - see below
MPEC 2009-D49 time-stamped "14:38 UT" - 2009 DS10 - see below
MPEC 2009-D50 time-stamped "14:40 UT" - 2009 DT10 - see below
MPEC 2009-D51 time-stamped "14:42 UT" - 2009 DU10 - see below
MPEC 2009-D52 time-stamped "22:41 UT" - Comet 33P/Daniel

MPEC 2009-D52 - "22:41 UT" - Comet 33P/Daniel

0033P 33P/Daniel (q=2.170 AU, Q=5.895 AU, TP=2008 July 20.34843 TT) from Tzec Maun Obs. Mayhill (Feb. 19.45-46p3, 20.33-34p3, 21.41-42p3 & 22.41-42p3), Ageo Obs. (Feb. 20.82p2 & 21.67p3), Nazaret Obs. (Feb. 20.99-02p3), Montcabre Obs. (Feb. 20.99-00p3), RAS Obs. Mayhill (Feb. 21.35p1), Petit Jean Mtn. South Obs. (PJMSO) (Feb. 21.37-38p7 & 22.37-38p6), and Atlante Obs. (Feb. 22.02-03p3)

MPEC 2009-D51 - "14:42 UT" - 2009 DU10

K09D10U 2009 DU10 (small asteroid, Earth MOID=2.1 LD, H=26.8 ~15m) was discovered at 0444 UT on 22 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 22.20-22p8 and 22.39-40p8. The discovery was confirmed by Calar Alto Obs. (Feb. 22.24p3), Sandlot Obs. (Feb. 22.24p2), Sabino Canyon Obs. (Feb. 22.27-28p6), and Magdalena Ridge Obs. (MRO) (Feb. 22.30-32p5). This object is now within ten lunar distances (LD) of Earth, reaching 2.4 LD on 25 Feb.

MPEC 2009-D50 - "14:40 UT" - 2009 DT10

K09D10T 2009 DT10 (small asteroid, Earth MOID=6.8 LD, H=22.9 ~89m) was discovered at 1703 UT on 21 Feb. by the Siding Spring Survey (SSS), which observed it at Feb. 21.71-78p10. The discovery was confirmed by Schiaparelli Obs. (Feb. 21.97-98p3), Libbiano Obs. (Feb. 21.98-99p3), Great Shefford Obs. (Feb. 21.00-03p3), Calar Alto Obs. (Feb. 22.03p3), Sabino Canyon Obs. (Feb. 22.31-32p3), the Mt. Lemmon Survey (MLS) (Feb. 22.31-33p3), Sandlot Obs. (Feb. 22.31-32p3), and MRO (Feb. 22.34-35p4).

MPEC 2009-D49 - "14:38 UT" - 2009 DS10

K09D10S 2009 DS10 (risk-listed, H=21.0 ~214m) was discovered at 0301 UT on 21 Feb. by MLS, which observed it at Feb. 21.13p3. The discovery was confirmed by MRO (Feb. 21.20-22p4, 22.11p1 & 22.16-18p4), Great Shefford Obs. (Feb. 21.85-86p2), and Sandlot Obs. (Feb. 22.15-16p2).

<< DOU on 22 Feb. '09 >> MPEC 2009-D48 - "07:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K09D03R 2009 DR3 (arc=2 days, H=21.5 ~170m) from PJMSO (Feb. 21.30-32p10) and Great Shefford Obs. (Feb. 22.05-06p3)
K09D01M 2009 DM1 (Q=4.080 AU, arc=3 days, H=17.2 ~1.23 km) from MRO (Feb. 22.08-10p4)
K09D01A 2009 DA1 (small asteroid, Q=4.235 AU, arc=2 days, H=22.3 ~117m) from the Spacewatch 1.8m telescope (Feb. 21.25-26p3)
Observations of recently (no longer) risk-listed objects
K09D01F 2009 DF1 (arc=2 days, H=20.5 ~269m) from LINEAR (Feb. 21.40-44p5)
K09C05V 2009 CV5 (small asteroid, arc=6 days, H=24.8 ~37m) from CSS (Feb. 21.46-47p4)
K09C05Q 2009 CQ5 (arc=6 days, H=17.7 ~977m) from Astronomical Research Obs. (ARO) (Feb. 20.04p4)
K09C04R 2009 CR4 (arc=7 days, H=21.7 ~155m) from ARO (Feb. 20.21-22p3)
K09C02R 2009 CR2 (Q=5.035 AU, arc=17 days, H=16.5 ~1.70 km) from ARO (Feb. 20.31p3)
K09C00Z 2009 CZ (arc=17 days, H=17.9 ~891m) from ARO (Feb. 20.10p3)
K09C00V 2009 CV (small asteroid, arc=18 days, H=24.2 ~49m) from Farra d'Isonzo Obs. (Feb. 18.85p3) and ARO (Feb. 20.43-44p6)
K09C00S 2009 CS (arc=19 days, H=19.7 ~389m) from ARO (Feb. 20.33p3) and PJMSO (Feb. 21.35-36p8)
K09B81F 2009 BF81 (small asteroid, arc=20 days, H=25.2 ~31m) from ARO (Feb. 20.26-31p3 at V=22.3-5)
K09B58J 2009 BJ58 (arc=23 days, H=19.1 ~513m) from Spacewatch 1.8m (Feb. 21.18-19p3)
K09B58C 2009 BC58 (arc=27 days, H=18.8 ~589m) from Spacewatch 1.8m (Feb. 21.24-25p3)
Observations of small asteroids (H>22.0)
K09D00W 2009 DW (arc=3 days, H=25.9 ~22m) from ARO (Feb. 20.44-45p3)
K09D00V 2009 DV (arc=3 days, H=24.9 ~35m) from ARO (Feb. 20.26p3)
K09D00D 2009 DD (arc=4 days, H=25.7 ~25m) from ARO (Feb. 20.35-36p3)
K09C02X 2009 CX2 (arc=19 days, H=23.9 ~56m) from Spacewatch 1.8m (Feb. 22.24-25p3)
K09C01U 2009 CU1 (arc=17 days, H=22.4 ~112m) from ARO (Feb. 20.25-26p3)
K09C00G 2009 CG (arc=19 days, H=22.9 ~89m) from ARO (Feb. 20.34-35p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09C01W 2009 CW1 (arc=17 days, H=21.8 ~148m) from ARO (Feb. 20.32p3)
K09B58O 2009 BO58 (arc=22 days, H=21.9 ~141m) from ARO (Feb. 20.23-24p3)
K08Y03G 2008 YG3 (Q=4.062 AU, arc=60 days, H=22.0 ~135m) from ARO (Feb. 20.16-17p3 at V=22.0-22.1)
Observations of other objects
K09D09G 2009 DG9 (Q=4.494 AU, arc=1 day, H=20.9 ~224m) from Great Shefford Obs. (Feb. 21.90-92p3)
K09D04Q 2009 DQ4 (arc=1 day, H=20.9 ~224m) from SSS (Feb. 21.59-60p3)
K09D04O 2009 DO4 (i=37.7°, Q=4.081 AU, arc=1 day, H=21.1 ~204m) from LINEAR (Feb. 21.27-38p10) and Moriyama Obs. (Feb. 21.60p2)
K09D01L 2009 DL1 (arc=2 days, H=18.9 ~562m) from Spacewatch 1.8m (Feb. 21.37-38p3)
K09D01D 2009 DD1 (arc=2 days, H=20.3 ~295m) from LINEAR (Feb. 21.27-32p5)
K09D00Z 2009 DZ (arc=3 days, H=21.4 ~178m) from Balzaretto Obs. (Feb. 20.79-80p2)
K09C05T 2009 CT5 (q=0.280 AU, arc=5 days, H=18.7 ~616m) from ARO (Feb. 20.08-09p4)
K09C05P 2009 CP5 (arc=6 days, H=21.3 ~186m) from ARO (Feb. 20.27p3)
K09C05O 2009 CO5 (arc=19 days, H=21.7 ~155m) from LINEAR (Feb. 21.15-20p5)
K09C05N 2009 CN5 (arc=7 days, H=20.1 ~323m) from ARO (Feb. 20.28-29p3) and Crni Vrh Obs. (Feb. 20.74-75p2)
K09C02Z 2009 CZ2 (Q=4.064 AU, arc=16 days, H=19.0 ~537m) from ARO (Feb. 20.09p3)
K09B81E 2009 BE81 (arc=20 days, H=21.0 ~214m) from ARO (Feb. 20.11p3)
K09B77E 2009 BE77 (Q=4.606 AU, arc=20 days, H=18.2 ~776m) from ARO (Feb. 20.05-06p4)
K09B71A 2009 BA71 (arc=2 opp, H=20.7 ~245m) from La Sagra Obs. (Feb. 18.88-89p6), PJMSO (Feb. 21.33-35p6), and Verona Obs. (Feb. 21.97-98p4)
K09B02L 2009 BL2 (arc=33 days, H=19.2 ~490m) from ARO (Feb. 20.12p4)
K09B00F 2009 BF (i=51.6°, arc=37 days, H=18.6 ~645m) from Spacewatch 1.8m (Feb. 22.12-13p3)
K09B00B 2009 BB (q=0.373 AU, Q=4.464 AU, arc=35 days, H=18.4 ~708m) from ARO (Feb. 20.07-08p3)
K08YE8V 2008 YV148 (arc=61 days, H=20.6 ~257m) from ARO (Feb. 20.18p3)
K08Y32Z 2008 YZ32 (arc=51 days, H=20.2 ~309m) from ARO (Feb. 20.14-17p3)
K08Y29E 2008 YE29 (Q=4.542 AU, arc=53 days, H=20.4 ~282m) from LINEAR (Feb. 21.16-20p4)
K08Y27S 2008 YS27 (arc=53 days, H=21.2 ~195m) from ARO (Feb. 20.46-47p3)
K08X03E 2008 XE3 (Q=4.045 AU, arc=2 opp, H=16.3 ~1.86 km) from MLS (Feb. 21.20-22p4)
K08U94Z 2008 UZ94 (arc=116 days, H=17.6 ~1.02 km) from SSS (Feb. 21.47-50p4)
K08U04S 2008 US4 (arc=137 days, H=20.9 ~224m) from ARO (Feb. 20.42-43p3 at V=22.0-22.4)
K08TF7E 2008 TE157 (Q=4.444 AU, arc=142 days, H=20.8 ~234m) from LINEAR (Feb. 21.15-20p5)
K08E05V 2008 EV5 (arc=2 opp, H=20.0 ~339m) from ARO (Feb. 20.13p4)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from PJMSO (Feb. 21.33p5)
K06B10C 2006 BC10 (arc=3 opp, H=19.5 ~426m) from Verona Obs. (Feb. 21.00-01p4)
K05W55S 2005 WS55 (arc=4 opp, H=16.0 ~2.14 km, q=1.108 AU) from LINEAR (Feb. 21.10-13p4)
K04E09U 2004 EU9 (arc=3 opp, H=18.9 ~562m) from PJMSO (Feb. 21.38-39p6)
J91J00W 1991 JW (arc=5 opp, H=19.6 ~407m) from ARO (Feb. 20.48-49p3)
K5378 205378 2001 BJ16 from CSS (Feb. 21.27-29p4)
K0840 200840 2001 XN254 from CSS (Feb. 21.14-15p4)
F2889 152889 2000 CF59 from CSS (Feb. 21.30-32p4)
E2348 142348 2002 RX211 from LINEAR (Feb. 21.15-20p5)
E1495 141495 2002 EZ11 from LINEAR (Feb. 21.41-44p4)
86666 86666 2000 FL10 from LINEAR (Feb. 21.47-51p3)
25916 25916 2001 CP44 from CSS (Feb. 21.28-30p4)
01036 1036 Ganymed (1924 TD) from SSS (Feb. 21.65-68p3)

Observers on 22 February '09

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

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 1 in MPEC 2009-D52 -- 33P
`H55`	Astronomical Research Obs. (ARO) in Illinois, 29 in MPEC 2009-D48 -- 2009 DW, 2009 DV, 2009 DD, 2009 CZ2, 2009 CZ, 2009 CW1, 2009 CV, 2009 CU1, 2009 CT5, 2009 CS, 2009 CR4, 2009 CR2, 2009 CQ5, 2009 CP5, 2009 CN5, 2009 CG, 2009 BO58, 2009 BL2, 2009 BF81, 2009 BE81, 2009 BE77, 2009 BB, 2008 YZ32, 2008 YV148, 2008 YS27, 2008 YG3, 2008 US4, 2008 EV5, 1991 JW
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2009-D52 -- 33P
`A81`	Balzaretto Obs. in Italy, 1 in MPEC 2009-D48 -- 2009 DZ
`493`	Calar Alto Obs. in Spain, 2 in MPECs 2009-D50 & 2009-D51 -- 2009 DU10, 2009 DT10
`703`	Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-D48 & 2009-D51 -- 2009 DU10, 2009 CV5, 25916, 205378, 200840, 152889
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2009-D48 -- 2009 CN5
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-D48 -- 2009 CV
`J95`	Great Shefford Obs. in England, 4 in MPECs 2009-D48, 2009-D49 & 2009-D50 -- 2009 DT10, 2009 DS10, 2009 DR3, 2009 DG9
`704`	LINEAR in New Mexico, 10 in MPEC 2009-D48 -- 2009 DO4, 2009 DF1, 2009 DD1, 2009 CO5, 2008 YE29, 2008 TE157, 2005 WS55, 86666, 142348, 141495
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2009-D48 -- 2009 BA71
`B33`	Libbiano Obs. in Italy, 1 in MPEC 2009-D50 -- 2009 DT10
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-D48, 2009-D49, 2009-D50 & 2009-D51 -- 2009 DU10, 2009 DT10, 2009 DS10, 2009 DM1
`213`	Montcabre Obs. in Spain, 1 in MPEC 2009-D52 -- 33P
`900`	Moriyama Obs. in Japan, 1 in MPEC 2009-D48 -- 2009 DO4
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2009-D48, 2009-D49 & 2009-D50 -- 2009 DT10, 2009 DS10, 2008 XE3
`J47`	Nazaret Obs. in Spain, 1 in MPEC 2009-D52 -- 33P
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPECs 2009-D48 & 2009-D52 -- 2009 DR3, 2009 CS, 2009 BA71, 2006 WZ2, 2004 EU9, 33P
`H06`	RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-D52 -- 33P
`854`	Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-D50 & 2009-D51 -- 2009 DU10, 2009 DT10
`H36`	Sandlot Obs. in Kansas, 3 in MPECs 2009-D49, 2009-D50 & 2009-D51 -- 2009 DU10, 2009 DT10, 2009 DS10
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2009-D50 -- 2009 DT10
`E12`	Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2009-D48 & 2009-D50 -- 2009 DT10, 2009 DQ4, 2008 UZ94, 1036
`291`	Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2009-D48 -- 2009 DL1, 2009 DA1, 2009 CX2, 2009 BJ58, 2009 BF, 2009 BC58
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-D52 -- 33P
`A48`	Verona Obs. in Italy, 2 in MPEC 2009-D48 -- 2009 BA71, 2006 BC10

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

Impact Risk Monitoring on 22 February '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2300 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 DS10	JPL Sentry	1732	2028-2108	17	1.4e-08	-5.84	-6.65	0	JPL: "Analysis based on 16 observations spanning 1.0524 days (2009-Feb-21.12598 to 2009-Feb-22.17841)." Diameter approximately 0.233 km. from mean, weighted H=20.8.

2009 DR3	JPL Sentry	1651	R E M O V E D						JPL: Risk listing removed at 1031 UTC.
2009 DR3	NEODyS	1651	R E M O V E D						-

2009 DM1	JPL Sentry	1651	2010-2100	60	2.3e-07	-2.70	-3.39	0	JPL: "Analysis based on 29 observations spanning 2.9813 days (2009-Feb-19.11474 to 2009-Feb-22.09601)." Diameter approximately 1.100 km. from mean, weighted H=17.4.
2009 DM1	NEODyS	1651	2010-2090	45	1.92e-07	-2.76	-3.41	0	NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2009/02/19.116 to 2009/02/22.097."

2009 DA1	JPL Sentry	1651	2063-2064	2	1.4e-07	-5.45	-5.45	0	JPL: "Analysis based on 21 observations spanning 2.1958 days (2009-Feb-19.06293 to 2009-Feb-21.25877)." Diameter approximately 0.110 km. from mean, weighted H=22.4.
2009 DA1	NEODyS	1651	2058-2064	3	1.07e-07	-5.58	-5.60	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2009/02/19.064 to 2009/02/21.260."

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 22 February '09

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

2300	Grabbed MPEC 2009-D52 - Comet 33P/Daniel - see above
1732	Noted that JPL Sentry has posted 2009 DS10 as an impact risk - see above
1651	Noted that JPL Sentry has updated its 2009 DA1 risk assessment - see above Noted that NEODyS has updated its 2009 DA1 risk assessment - see above Noted that JPL Sentry has updated its 2009 DM1 risk assessment - see above Noted that NEODyS has updated its 2009 DM1 risk assessment - see above Noted that JPL Sentry has removed 2009 DR3 as an impact risk - see above Noted that NEODyS has removed 2009 DR3 as an impact risk - see above Grabbed MPEC 2009-D48 - Daily Orbit Update - see above Grabbed MPEC 2009-D49 - 2009 DS10 - see above Grabbed MPEC 2009-D50 - 2009 DT10 - see above Grabbed MPEC 2009-D51 - 2009 DU10 - see above

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