Contents  on 9 August '12

Asteroid/Comet Connection (A/CC) Resources:

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.

Traffic Report  on 9 August '12

No objects reported inside ten LD

There are no objects reported to be inside ten lunar distances (LD) of Earth today and none are known to be coming in until November.

This report was updated at 1544 UTC with follow-up in today's DOU MPEC for distant 1999 XL136. Today's first report was generated at 0053 UTC.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 9 August '12

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of sixteen listings on the NEOCP 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 9 August '12

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been two MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 9 Aug. '12 >>  MPEC 2012-P18 - "06:02 UT" - Daily Orbit Update

MPEC 2012-P17 - "00:13 UT" - 2012 PN

Observers  on 9 August '12

Fourteen observers appear in today's MPECs.

CodeObserver / observatory
169Airali Obs. in Italy, 1 in MPEC 2012-P18 -- 326732
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2012-P17 & 2012-P18 -- 2012 PN, 2012 PA, 2012 OE1, 2012 OB1, 2012 OA1, 2012 NP, 2012 MS4, 2012 MO3, 2012 LG11, 2012 LF11, 2012 HM1, 2012 FY23, 2007 PH25, 326732, 5836
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-P18 -- 2012 HG31
B75Betelgeuse Station in Italy, 1 in MPEC 2012-P18 -- 2012 OP4
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-P18 -- 2012 LU7
160Castelmartini Obs. in Italy, 7 in MPEC 2012-P18 -- 2012 LU7, 2012 LE11, 2012 HG31, 331963, 331471, 153958, 144411
151Eschenberg Obs. in Switzerland, 2 in MPECs 2012-P17 & 2012-P18 -- 2012 PN, 2012 LU7
203GiaGa Obs. in Italy, 4 in MPEC 2012-P18 -- 2012 PN, 2012 PA, 2012 LU7, 217013
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2012-P18 -- 153958
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2012-P17 & 2012-P18 -- 2012 PN, 2000 RN77, 1999 XL136, 1998 ST4, 87311, 52750, 189630, 163758, 139047, 5731
A53Peschiera del Garda Obs. in Italy, 1 in MPEC 2012-P18 -- 2012 LU7
J53Posadas Obs. in Spain, 1 in MPEC 2012-P18 -- 326732
B38Santa Mama Obs. in Italy, 5 in MPEC 2012-P18 -- 2012 PA, 2012 LU7, 2012 HG31, 173561, 105140
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-P18 -- 87684
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 August '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 risk pages.





Notes for Today's Latest Risk Assessments
2012 PNJPL Sentry1542206312.1e-06-5.53-5.530JPL #2 for the day: "Analysis based on 12 observations spanning 1.6492 days (2012-Aug-07.353994 to 2012-Aug-09.00318)." Diameter approximately 0.042 km. from mean, weighted H=24.6.

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 9 August '12

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

1544Generated Traffic Report
1542Noted that JPL Sentry has updated its 2012 PN risk assessment - see above
Grabbed MPEC 2012-P18 - Daily Orbit Update - see above
0210Noted that JPL Sentry has posted 2012 PN as an impact risk - see above
0052Grabbed MPEC 2012-P17 - 2012 PN - see above