Contents  on 28 July '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 28 July '09

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five updated listings. Of these, two 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 28 July '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-O45 - "15:02 UT" - 2009 OW6

MPEC 2009-O44 - "11:33 UT" - 2008 OX2

<< DOU on 28 July '09 >>  MPEC 2009-O43 - "06:07 UT" - Daily Orbit Update

MPEC 2009-O42 - "03:23 UT" - 2000 QS7

MPEC 2009-O41 - "03:01 UT" - 2008 FC76

Observers  on 28 July '09

Nineteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 21 in MPECs 2009-O43 & 2009-O44 -- 2009 OF, 2009 NL, 2009 NJ, 2009 NH, 2009 NA, 2009 MZ6, 2009 MX6, 2009 MN8, 2009 ML1, 2009 ME9, 2009 LS, 2009 KM7, 2009 KK8, 2009 KJ22, 2008 OX2, 2004 QU24, 1999 VM11, 1993 RA, 26663, 162723, 152770
J51Atlante Obs. in the Canary Islands, 3 in MPEC 2009-O43 -- 2002 NP1, 2001 AA50, 162483
A81Balzaretto Obs. in Italy, 1 in MPEC 2009-O43 -- 2002 LV
J05Bootes Obs., 1 in MPEC 2009-O43 -- 2009 OX5
235CAST Obs. in Italy, 1 in MPEC 2009-O43 -- 2009 OX5
160Castelmartini Obs. in Italy, 3 in MPEC 2009-O43 -- 162483, 15745, 14402
703Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2009-O43 & 2009-O45 -- 2009 OW6, 2009 LX, 2002 NP1, 65733, 52387, 161989, 5626, 3103, 2201
G58Chabot Obs. in northern California, 2 in MPEC 2009-O43 -- 2009 OF, 2009 KL2
J75La Sagra Obs. in Spain, 1 in MPEC 2009-O43 -- 2002 NP1
688Lowell Obs. Anderson Mesa Station in Arizona, 1 in MPEC 2009-O41 -- 2008 FC76
130Lumezzane Obs. in Italy, 1 in MPEC 2009-O41 -- 2008 FC76
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-O45 -- 2009 OW6
B28Mandi Obs. in Italy, 1 in MPEC 2009-O43 -- 2009 OX5
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-O42 -- 2000 QS7
118Modra Obs. in Slovakia, 1 in MPEC 2009-O43 -- 2009 OX5
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 14 in MPEC 2009-O43 -- 2009 OZ4, 2009 OF, 2009 OC, 2009 NL, 2009 NJ, 2009 NH, 2009 NE, 2009 MZ6, 2009 KL2, 2009 KC7, 2007 LL, 2005 MC, 2002 NP1, 2002 LV
649Powell Obs. in Kansas, 3 in MPEC 2009-O43 -- 2009 OZ4, 2009 OF, 2009 NL
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-O45 -- 2009 OW6
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2009-O43 -- 2009 MS, 2009 ME9, 2005 PJ2, 2004 RD84, 2004 RA11, 2002 JE9, 1993 RA
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 July '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 OW6JPL Sentry17052063-2104111.1e-05-5.38-5.750JPL: "Analysis based on 26 observations spanning 1.0942 days (2009-Jul-27.36058 to 2009-Jul-28.45479)." Diameter approximately 0.031 km. from mean, weighted H=25.2.
2000 QS7JPL Sentry1318R E M O V E DJPL: Risk listing removed at 0505 UTC.
NEODyS1318R E M O V E D-

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 28 July '09

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

1705Noted that JPL Sentry has posted 2009 OW6 as an impact risk - see above
1600Grabbed MPEC 2009-O45 - 2009 OW6 - see above
1318Noted that JPL Sentry has removed 2000 QS7 as an impact risk - see above
Noted that NEODyS has removed 2000 QS7 as an impact risk - see above
Grabbed MPEC 2009-O43 - Daily Orbit Update - see above
Grabbed MPEC 2009-O44 - 2008 OX2 - see above
0439Grabbed MPEC 2009-O42 - 2000 QS7 - see above
0321Grabbed MPEC 2009-O41 - 2008 FC76 - see above