2009-06-26 Tracking News

Contents on 26 June '09

IAU Minor Planet Center
- NEOCP Activity -- three listings: 1 new, 2 updated
- New MPECs -- three MPECs
Observers -- twelve 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 26 June '09

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and two updated listings. All of these were "one nighters." So far The Tracking News has counted a total of four 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 at Suno Observatory by Birtwhistle et al.

New MPECs on 26 June '09

Minor Planet Electronic Circulars

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

MPEC 2009-M38 time-stamped "16:18 UT" - Daily Orbit Update - see below
MPEC 2009-M39 time-stamped "18:35 UT" - 2005 VB7 - see below
MPEC 2009-M40 time-stamped "18:43 UT" - 2009 MZ6

MPEC 2009-M40 - "18:43 UT" - 2009 MZ6

K09M06Z 2009 MZ6 was discovered at 1709 UT on 25 June by Purple Mtn. Obs. XuYi Station (XuYi Sta.), which observed it at June 25.72-75p4. The discovery was confirmed by Doc Greiner Research Obs. (DGRO) (June 26.25-27p7), Cordell-Lorenz Obs. (June 26.32-37p4), and Tzec Maun Obs. Mayhill (June 26.43p2).

MPEC 2009-M39 - "18:35 UT" - 2005 VB7

K05V07B 2005 VB7 from David Tholen's team on Mauna Kea (June 2.44-46p3 at R=22.5-8 & 22.43-44p3 at R=22.6-8)

<< DOU on 26 June '09 >> MPEC 2009-M38 - "16:18 UT" - Daily Orbit Update

Observations of recently (no longer) risk-listed objects
K09K02L 2009 KL2 (arc=37 days, H=18.1 ~812m) from Petit Jean Mtn. South Obs. (PJMSO) (June 26.25-27p6)
Observations of other objects
K09M01M 2009 MM1 (arc=2 days, H=21.7 ~155m) from the Siding Spring Survey (SSS) (June 25.68p1)
K09M00A 2009 MA (arc=10 days, H=21.5 ~170m) from PJMSO (June 26.20-21p7) and DGRO (June 26.22-23p3)
K09K22J 2009 KJ22 (arc=25 days, H=20.0 ~339m) from Santa Maria de Montmagastrell Obs. (June 25.03p1)
K09J01K 2009 JK1 (arc=98 days, H=19.9 ~355m) from Mirasteilas Obs. (June 25.89-92p3)
K09D01N 2009 DN1 (arc=126 days, H=20.3 ~295m) from SSS (June 25.44p2)
K02U00X 2002 UX (arc=3 opp, H=17.9 ~891m) from DGRO (June 26.16p4)
K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from Skylive Obs. (June 25.89p3), DGRO (June 26.13-14p3), and PJMSO (June 26.29-30p5)
K01H07Y 2001 HY7 (arc=5 opp, H=20.5 ~269m) from DGRO (June 26.17-18p6)
K01F90E 2001 FE90 (arc=2 opp, H=20.4 ~282m) from Thompsonville Obs. (June 26.16-17p6) and PJMSO (June 26.27p10)
K00O22B 2000 OB22 (Q=4.252 AU, arc=4 opp, H=17.1 ~1.29 km) from PJMSO (June 26.30-31p5)
L5442 215442 2002 MQ3 from Skylive Obs. (June 25.87-88p3)
05620 5620 Jasonwheeler (1990 OA) from Atlante Obs. (June 25.94-95p3) and Thompsonville Obs. (June 26.17-19p5)

Observers on 26 June '09

Twelve observing facilities appear in today's MPECs.

Code	Observer / observatory
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2009-M38 -- 5620
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-M40 -- 2009 MZ6
`H26`	Doc Greiner Research Obs. (DGRO) in Wisconsin, 5 in MPECs 2009-M38 & 2009-M40 -- 2009 MZ6, 2009 MA, 2002 UX, 2002 LV, 2001 HY7
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-M39 -- 2005 VB7
`B67`	Mirasteilas Obs. in Switzerland, 1 in MPEC 2009-M38 -- 2009 JK1
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-M38 -- 2009 MA, 2009 KL2, 2002 LV, 2001 FE90, 2000 OB22
`D29`	Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2009-M40 -- 2009 MZ6
`B74`	Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-M38 -- 2009 KJ22
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2009-M38 -- 2009 MM1, 2009 DN1
`B40`	Skylive Obs. in Italy, 2 in MPEC 2009-M38 -- 2002 LV, 215442
`H53`	Thompsonville Obs. in Illinois, 2 in MPEC 2009-M38 -- 2001 FE90, 5620
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-M40 -- 2009 MZ6

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

Impact Risk Monitoring on 26 June '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

2008 AO112	JPL Sentry	0336	2010-2099	45	1.5e-07	-4.30	-4.62	0	JPL: "Analysis based on 8 observations spanning 1.0097 days (2008-Jan-11.08899 to 2008-Jan-12.098698)." Diameter approximately 0.310 km. from mean, weighted H=20.2.

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 June '09

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

1900	Grabbed MPEC 2009-M39 - 2005 VB7 - see above Grabbed MPEC 2009-M40 - 2009 MZ6 - see above
1800	Grabbed MPEC 2009-M38 - Daily Orbit Update - see above
0336	Noted that JPL Sentry has updated its 2008 AO112 risk assessment - see above

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