Contents  on 22 June '09


The latest A/CC news is available via framed access, RSS news feed 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 June '09

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of eleven 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 22 June '09

Minor Planet Electronic Circulars

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

MPEC 2009-M21 - "11:45 UT" - 2009 MX

MPEC 2009-M20 - "11:42 UT" - 2009 MW

MPEC 2009-M19 - "11:38 UT" - 2009 MU

MPEC 2009-M18 - "11:27 UT" - 2009 MS

<< DOU on 22 June '09 >>  MPEC 2009-M17 - "06:06 UT" - Daily Orbit Update

Observers  on 22 June '09

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPECs 2009-M19 & 2009-M21 -- 2009 MX, 2009 MU
670Camarillo Obs. in southern California, 1 in MPEC 2009-M19 -- 2009 MU
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2009-M17 & 2009-M19 -- 2009 MU, 194386
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-M19 -- 2009 MU
J27El Guijo Obs. in Spain, 1 in MPEC 2009-M17 -- 2002 LV
734Farpoint Obs. in Kansas, 1 in MPEC 2009-M20 -- 2009 MW
J95Great Shefford Obs. in England, 2 in MPECs 2009-M19 & 2009-M21 -- 2009 MX, 2009 MU
704LINEAR in New Mexico, 2 in MPECs 2009-M17 & 2009-M20 -- 2009 MW, 163051
B33Libbiano Obs. in Italy, 1 in MPEC 2009-M19 -- 2009 MU
560Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2009-M17 -- 2009 LS, 2009 KL2, 2002 LV, 2000 OB22
B28Mandi Obs. in Italy, 2 in MPECs 2009-M17 & 2009-M19 -- 2009 MU, 2001 FE90
118Modra Obs. in Slovakia, 1 in MPEC 2009-M19 -- 2009 MU
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2009-M17, 2009-M18, 2009-M19, 2009-M20 & 2009-M21 -- 2009 MX, 2009 MW, 2009 MU, 2009 MS, 2009 LW2, 67367
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-M17 -- 2009 MA, 2009 JK1, 2009 BL2, 2002 LV, 2001 FE90
D90.Cristovao Jacques in Brazil via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-M19 -- 2009 MU
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-M19 & 2009-M20 -- 2009 MW, 2009 MU
204Schiaparelli Obs. in Italy, 4 in MPEC 2009-M17 -- 2009 LQ, 2009 LA, 2009 KL2, 2002 LT38
B40Skylive Obs. in Italy, 3 in MPEC 2009-M17 -- 2002 LV, 15745, 14402
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2009-M17, 2009-M18, 2009-M19 & 2009-M21 -- 2009 MX, 2009 MU, 2009 MS, 2009 LW2, 2009 KO4, 2004 LC2
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2009-M18, 2009-M19 & 2009-M20 -- 2009 MW, 2009 MU, 2009 MS
H83Timberlake Obs. in Virginia, 1 in MPEC 2009-M17 -- 2009 LS
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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.





Notes for Today's Latest Risk Assessments
2009 MUJPL Sentry14312096-209925.5e-07-6.21-6.280JPL: "Analysis based on 62 observations spanning 2.9141 days (2009-Jun-19.30659 to 2009-Jun-22.22069)." Diameter approximately 0.043 km. from mean, weighted H=24.5.

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 June '09

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

1431Noted that JPL Sentry has posted 2009 MU as an impact risk - see above
1330Grabbed MPEC 2009-M17 - Daily Orbit Update - see above
Grabbed MPEC 2009-M18 - 2009 MS - see above
Grabbed MPEC 2009-M19 - 2009 MU - see above
Grabbed MPEC 2009-M20 - 2009 MW - see above
Grabbed MPEC 2009-M21 - 2009 MX - see above