2009-03-15 Tracking News

Contents on 15 March '09

IAU Minor Planet Center
- NEOCP Activity -- five listings: 2 new, 3 updated
- New MPECs -- four MPECs
Observers -- eighteen observing facilities
Impact Risk Monitoring -- one object
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 15 March '09

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of nine 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 15 March '09

Minor Planet Electronic Circulars

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

MPEC 2009-E67 time-stamped "06:07 UT" - Daily Orbit Update - see below
MPEC 2009-E68 time-stamped "12:07 UT" - Comet C/2009 E1 (Itagaki) - see below
MPEC 2009-E69 time-stamped "16:16 UT" - Comet C/2009 E1 (Itagaki) - see below
MPEC 2009-E70 time-stamped "16:59 UT" - 2009 DO111

MPEC 2009-E70 - "16:59 UT" - 2009 DO111

K09DB1O 2009 DO111 (risk-listed, Earth MOID=1.0 LD, H=22.6 ~102m) was discovered at 0802 UT on 22 Feb. by the Spacewatch 0.9m telescope, which observed it at Feb. 22.33-37p3, 26.35-39p3, and March 2.34-38p3. The discovery was confirmed by the Catalina Sky Survey (CSS) (March 15.42-43p4 & 15.51p4), Ernesto Guido via RAS Obs. Mayhill (March 15.49-50p2), and Moriyama Obs. (March 15.59-60p2). This object is now within ten lunar distances (LD) of Earth, reaching 1.3 LD on 20 March.

MPEC 2009-E69 - "16:16 UT" - Comet C/2009 E1 (Itagaki)

CK09E010 C/2009 E1 (Itagaki) from Takanezawa Obs. (March 14.42-44p6 & 15.40-42p6), Moriyama Obs. (March 15.42-43p4), Yatsuka Obs. (March 15.50p3), and Xingming Obs. (March 15.56-58p4)

MPEC 2009-E68 - "12:07 UT" - Comet C/2009 E1 (Itagaki)

CK09E010 C/2009 E1 (Itagaki) (i=125.4°, q=0.600 AU, TP=2009 Apr. 8.167 TT) from Takanezawa Obs. (March 14.42-44p6), Astronomical Research Obs. (ARO) (March 15.04p3), RAS Obs. Mayhill (March 15.11-12p2), Sabino Canyon Obs. (March 15.12p3), and Ageo Obs. (March 15.40-41p5 & 15.46p3)

<< DOU on 15 Mar. '09 >> MPEC 2009-E67 - "06:07 UT" - Daily Orbit Update

Observations of recently (no longer) risk-listed objects
K09D43V 2009 DV43 (small asteroid, arc=9 days, H=23.7 ~62m) from Doc Greiner Research Obs. (DGRO) (March 6.21p3)
K09D10S 2009 DS10 (arc=22 days, H=21.0 ~214m) from the Spacewatch 1.8m telescope (March 15.16-17p2 at V=20.7-22.1)
K09D03R 2009 DR3 (arc=29 days, H=21.5 ~170m) from the Siding Spring Survey (SSS) (March 13.43p2), Siegen Obs. (March 13.85-87p3), and Great Shefford Obs. (March 14.81-82p3)
K09C04R 2009 CR4 (arc=30 days, H=21.7 ~155m) from Spacewatch 1.8m (March 15.18-19p3)
Observations of small asteroids (H>22.0)
K09E01M 2009 EM1 (arc=10 days, H=22.8 ~93m) from SSS (March 13.45-46p2)
K09D01C 2009 DC1 (arc=24 days, H=24.0 ~54m) from Spacewatch 1.8m (March 15.21-22p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09C05R 2009 CR5 (arc=29 days, H=22.0 ~135m) from Spacewatch 1.8m (March 15.13-14p2)
Observations of other objects
K09E02P 2009 EP2 (arc=8 days, H=21.4 ~178m) from SSS (March 13.46p2) and Rio Cuarto Obs. (March 14.08-12p5)
K09E02O 2009 EO2 (arc=8 days, H=19.5 ~426m) from SSS (March 13.40-43p3)
K09C05T 2009 CT5 (q=0.278 AU, arc=28 days, H=18.7 ~616m) from Spacewatch 1.8m (March 15.14-15p3)
K09C05S 2009 CS5 (arc=29 days, H=19.4 ~446m) from Spacewatch 1.8m (March 15.15-16p3)
K09C03A 2009 CA3 (arc=39 days, H=20.0 ~339m) from Spacewatch 1.8m (March 15.20-21p2)
K09B77D 2009 BD77 (arc=42 days, H=20.4 ~282m) from SSS (March 13.44p2)
K09B71K 2009 BK71 (i=36.3°, arc=44 days, H=19.5 ~426m) from Spacewatch 1.8m (March 15.19-20p3)
K09A15M 2009 AM15 (arc=67 days, H=18.7 ~616m) from SSS (March 14.40-41p2)
K08Y29E 2008 YE29 (Q=4.545 AU, arc=74 days, H=20.5 ~269m) from Malina River Obs. (March 13.81-85p4)
K07B02T 2007 BT2 (arc=3 opp, H=17.2 ~1.23 km) from Malina River Obs. (March 15.09-14p7)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from Malina River Obs. (March 13.87-88p3)
K05S25N 2005 SN25 (arc=3 opp, H=19.7 ~389m) from Spacewatch 1.8m (March 15.10-11p3)
10302 10302 1989 ML from Jaen Obs. (March 14.89-91p2)

Observers on 15 March '09

Eighteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 1 in MPEC 2009-E68 -- C/2009 E1
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2009-E68 -- C/2009 E1
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2009-E70 -- 2009 DO111
`H26`	Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-E67 -- 2009 DV43
`J95`	Great Shefford Obs. in England, 1 in MPEC 2009-E67 -- 2009 DR3
`J28`	Jaen Obs. in Spain, 1 in MPEC 2009-E67 -- 10302
`B90`	Malina River Obs., 3 in MPEC 2009-E67 -- 2008 YE29, 2007 BT2, 2006 WZ2
`900`	Moriyama Obs. in Japan, 2 in MPECs 2009-E69 & 2009-E70 -- C/2009 E1, 2009 DO111
`H06`	RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-E68 -- C/2009 E1
`H06%`	Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-E70 -- 2009 DO111
`I20`	Rio Cuarto Obs. in Argentina, 1 in MPEC 2009-E67 -- 2009 EP2
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-E68 -- C/2009 E1
`E12`	Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2009-E67 -- 2009 EP2, 2009 EO2, 2009 EM1, 2009 DR3, 2009 BD77, 2009 AM15
`510`	Siegen Obs. in Germany, 1 in MPEC 2009-E67 -- 2009 DR3
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-E70 -- 2009 DO111
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2009-E67 -- 2009 DS10, 2009 DC1, 2009 CT5, 2009 CS5, 2009 CR5, 2009 CR4, 2009 CA3, 2009 BK71, 2005 SN25
`D94`	Takanezawa Obs. in Japan, 1 in MPECs 2009-E68 & 2009-E69 -- C/2009 E1
`C42`	Xingming Obs. in China, 1 in MPEC 2009-E69 -- C/2009 E1
`367`	Yatsuka Obs. in Japan, 1 in MPEC 2009-E69 -- C/2009 E1

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

Impact Risk Monitoring on 15 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 DO111	JPL Sentry	1901	2068-2108	22	1.0e-04	-3.21	-3.49	0	JPL: "Analysis based on 21 observations spanning 21.260 days (2009-Feb-22.33494 to 2009-Mar-15.59514)." Diameter approximately 0.097 km. from mean, weighted H=22.7.

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 15 March '09

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

1901	Noted that JPL Sentry has posted 2009 DO111 as an impact risk - see above
1834	Grabbed MPEC 2009-E69 - Comet C/2009 E1 (Itagaki) - see above Grabbed MPEC 2009-E70 - 2009 DO111 - see above
1438	Grabbed MPEC 2009-E67 - Daily Orbit Update - see above Grabbed MPEC 2009-E68 - Comet C/2009 E1 (Itagaki) - see above

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