2009-02-26 Tracking News

Contents on 26 February '09

IAU Minor Planet Center
- NEOCP Activity -- six listings: 6 updated
- New MPECs -- two MPECs
Observers -- fourteen observing facilities
Impact Risk Monitoring -- five 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 26 February '09

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six updated listings. All of these were "one nighters."

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 26 February '09

Minor Planet Electronic Circulars

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

MPEC 2009-D65 time-stamped "07:07 UT" - Daily Orbit Update - see below
MPEC 2009-D66 time-stamped "13:20 UT" - 2009 DM40

MPEC 2009-D66 - "13:20 UT" - 2009 DM40

K09D40M 2009 DM40 (small asteroid, Earth MOID=1.8 LD, H=26.8 ~15m) was discovered at 0919 UT on 26 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 26.39-40p3 and 26.46-53p5. This object is now within ten lunar distances (LD) of Earth, reaching 2.3 LD on 23 Feb.

<< DOU on 26 Feb. '09 >> MPEC 2009-D65 - "07:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K09D39H 2009 DH39 (i=53.4°, arc=1 day, H=18.6 ~645m) from the Spacewatch 1.8m telescope (Feb. 26.14-15p2)
K09D01M 2009 DM1 (Q=6.556 AU, arc=7 days, H=17.1 ~1.29 km) from Spacewatch 1.8m (Feb. 26.10-11p3)
K09D01A 2009 DA1 (small asteroid, Q=4.338 AU, arc=7 days, H=22.3 ~117m) from Magdalena Ridge Obs. (MRO) (Feb. 25.41p3) and Spacewatch 1.8m (Feb. 26.21-22p3)
K09C03B 2009 CB3 (q=0.295 AU, arc=21 days, H=19.5 ~426m) from CSS (Feb. 24.46-49p6, 24.54-55p3 & 25.42p4), Calar Alto Obs. (Feb. 25.05p3), MRO (Feb. 25.34-36p4), and Sandlot Obs. (Feb. 25.44-45p3)
K09B58F 2009 BF58 (small asteroid, arc=28 days, H=27.3 ~12m) from MRO (Feb. 25.44p1 at R=23.0)
Observations of recently (no longer) risk-listed objects
K09D03R 2009 DR3 (arc=12 days, H=21.5 ~170m) from Naef Obs. (Feb. 25.80-83p3) and Mirasteilas Obs. (Feb. 26.01-03p3)
K09D01E 2009 DE1 (small asteroid, arc=6 days, H=24.3 ~47m) from MRO (Feb. 25.46-47p3)
K09C04R 2009 CR4 (arc=13 days, H=21.7 ~155m) from Spacewatch 1.8m (Feb. 26.19p3)
K09B81F 2009 BF81 (small asteroid, arc=20 days, H=25.2 ~31m) from Astronomical Research Obs. (ARO) (Feb. 15.23-27p3 at V=22.8-23.1)
Observations of small asteroids (H>22.0)
K09D36S 2009 DS36 (arc=1 day, H=25.8 ~23m) from Faulkes Telescope South (Feb. 25.67-71p19) and Calar Alto Obs. (Feb. 25.90p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09C05R 2009 CR5 (arc=12 days, H=22.0 ~135m) from Spacewatch 1.8m (Feb. 26.16-17p3)
Observations of other objects
K09D36R 2009 DR36 (arc=1 day, H=20.6 ~257m) from CSS (Feb. 25.42p3) and Sandlot Obs. (Feb. 25.42-43p3)
K09C05S 2009 CS5 (arc=12 days, H=19.4 ~446m) from Spacewatch 1.8m (Feb. 26.17-18p3)
K09B71A 2009 BA71 (arc=2 opp, H=20.7 ~245m) from CSS (Feb. 25.31-33p4) and Naef Obs. (Feb. 25.80-84p3)
K09B02E 2009 BE2 (arc=41 days, H=18.9 ~562m) from Spacewatch 1.8m (Feb. 26.11-13p3)
K08Y27S 2008 YS27 (arc=53 days, H=21.2 ~195m) from ARO (Feb. 17.38-40p3)
K08S82H 2008 SH82 (arc=144 days, H=21.4 ~178m) from ARO (Feb. 17.19-20p3)
K06B10C 2006 BC10 (arc=3 opp, H=19.5 ~426m) from CSS (Feb. 25.31-33p4) and Calar Alto Obs. (Feb. 25.89p3)
K02V94Y 2002 VY94 (Q=5.375 AU, arc=2 opp, H=16.8 ~1.48 km) from LINEAR (Feb. 25.11-14p4)
J94A01W 1994 AW1 (arc=3 opp, H=17.6 ~1.02 km) from LINEAR (Feb. 25.12-15p4)
H5706 175706 1996 FG3 from LINEAR (Feb. 25.41-44p3)
E2348 142348 2002 RX211 from Mirasteilas Obs. (Feb. 25.97-98p3)
36284 36284 2000 DM8 from El Guijo Obs. (Feb. 25.84-86p3)
35396 35396 1997 XF11 from LINEAR (Feb. 25.41-44p3)
25916 25916 2001 CP44 from Mirasteilas Obs. (Feb. 26.05-07p3)
22771 22771 1999 CU3 from Bigmuskie Obs. (Feb. 24.89-91p2 & 25.86-89p2)
22099 22099 2000 EX106 from LINEAR (Feb. 25.16-18p3)
20460 20460 Robwhiteley (1999 LO28) from LINEAR (Feb. 25.15-20p5)
18109 18109 2000 NG11 from CSS (Feb. 25.31-33p4)
16834 16834 1997 WU22 from the Siding Spring Survey (SSS) (Feb. 25.51-52p3)
12711 12711 Tukmit (1991 BB) from Bigmuskie Obs. (Feb. 25.81-88p3)
04179 4179 Toutatis (1989 AC) from Siegen Obs. (Feb. 24.89-90p3)
01864 1864 Daedalus (1971 FA) from Siegen Obs. (Feb. 24.93-95p3)
01627 1627 Ivar (1929 SH) from LINEAR (Feb. 25.10-15p5)

Observers on 26 February '09

Fourteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 3 in MPEC 2009-D65 -- 2009 BF81, 2008 YS27, 2008 SH82
`B88`	Bigmuskie Obs., 2 in MPEC 2009-D65 -- 22771, 12711
`493`	Calar Alto Obs. in Spain, 3 in MPEC 2009-D65 -- 2009 DS36, 2009 CB3, 2006 BC10
`703`	Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-D65 & 2009-D66 -- 2009 DR36, 2009 DM40, 2009 CB3, 2009 BA71, 2006 BC10, 18109
`J27`	El Guijo Obs. in Spain, 1 in MPEC 2009-D65 -- 36284
`E10`	Faulkes Telescope South in New South Wales, 1 in MPEC 2009-D65 -- 2009 DS36
`704`	LINEAR in New Mexico, 7 in MPEC 2009-D65 -- 2002 VY94, 1994 AW1, 35396, 22099, 20460, 175706, 1627
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPEC 2009-D65 -- 2009 DE1, 2009 DA1, 2009 CB3, 2009 BF58
`B67`	Mirasteilas Obs. in Switzerland, 3 in MPEC 2009-D65 -- 2009 DR3, 25916, 142348
`A13`	Naef Obs. in Switzerland, 2 in MPEC 2009-D65 -- 2009 DR3, 2009 BA71
`H36`	Sandlot Obs. in Kansas, 2 in MPEC 2009-D65 -- 2009 DR36, 2009 CB3
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2009-D65 -- 16834
`510`	Siegen Obs. in Germany, 2 in MPEC 2009-D65 -- 4179, 1864
`291`	Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2009-D65 -- 2009 DM1, 2009 DH39, 2009 DA1, 2009 CS5, 2009 CR5, 2009 CR4, 2009 BE2

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

Impact Risk Monitoring on 26 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 DH39	JPL Sentry	1458	2013-2074	4	2.0e-09	-4.75	-4.90	0	JPL: "Analysis based on 13 observations spanning .67204 days (2009-Feb-25.47873 to 2009-Feb-26.15077)." Diameter approximately 0.580 km. from mean, weighted H=18.8.

2009 DM1	NEODyS	1458	R E M O V E D						-
2009 DM1	JPL Sentry	1458	R E M O V E D						JPL: Risk listing removed at 0947 UTC.

2009 DA1	NEODyS	1458	2064	1	1.24e-11	-9.52	-9.52	0	NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2009/02/19.064 to 2009/02/26.221."
2009 DA1	JPL Sentry	1458	R E M O V E D						JPL: Risk listing removed at 0950 UTC.

2009 CB3	NEODyS	1458	R E M O V E D						-
2009 CB3	JPL Sentry	1458	R E M O V E D						JPL: Risk listing removed at 1006 UTC.

2009 BF58	JPL Sentry	1458	2055-2088	21	1.9e-04	-5.11	-5.32	0	JPL: "Analysis based on 56 observations spanning 28.173 days (2009-Jan-28.26267 to 2009-Feb-25.43554)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
2009 BF58	NEODyS	1458	2055-2090	40	1.86e-04	-5.12	-5.33	0	NEODyS: "Based on 56 optical observations (of which 0 are rejected as outliers) from 2009/01/28.263 to 2009/02/25.436."

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 February '09

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

1458

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 removed 2009 CB3 as an impact risk - see above
Noted that NEODyS has removed 2009 CB3 as an impact risk - see above
Noted that JPL Sentry has removed 2009 DA1 as an impact risk - see above
Noted that NEODyS has updated its 2009 DA1 risk assessment - see above
Noted that JPL Sentry has updated its 2009 DH39 risk assessment - see above
Noted that JPL Sentry has removed 2009 DM1 as an impact risk - see above
Noted that NEODyS has removed 2009 DM1 as an impact risk - see above
Grabbed MPEC 2009-D65 - Daily Orbit Update - see above
Grabbed MPEC 2009-D66 - 2009 DM40 - see above

0458

Noted that the NEOCP has become active

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