Contents  on 25 August '13

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 25 August '13

One object reported inside ten LD

There is one visitor reported within ten lunar distances (LD) of Earth today. Radar target 2013 QR1 enters ten LD today and exits tomorrow, coming its closest to Earth on this passage -- 8.22 LD -- at 1930 UT today.

This report was generated at 1515 UTC with follow-up in today's DOU MPEC for 2013 QR1 and departed radar target 277475 2005 WK4.

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 25 August '13

The MPC's NEO Confirmation Page has 9 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nine objects listed. So far The Tracking News has counted a total of fourteen listings on the NEOCP today.

New MPECs  on 25 August '13

Minor Planet Electronic Circulars

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

MPEC 2013-Q32 - "22:31 UT" - 2013 HU150

MPEC 2013-Q31 - "22:27 UT" - 2013 HT150

MPEC 2013-Q30 - "22:23 UT" - 2013 HS150

<< DOU on 25 Aug. '13 >>  MPEC 2013-Q29 - "06:01 UT" - Daily Orbit Update

Observers  on 25 August '13

Ten observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2013-Q29 -- 2013 QU1, 2013 PN43, 2010 UX95, 2006 EE1, 343166, 280136, 247517
470Ceccano Obs. in Italy, 1 in MPEC 2013-Q29 -- 2013 QR1
W841program code 1 via DECam in Chile, 3 in MPECs 2013-Q30, 2013-Q31 & 2013-Q32 -- 2013 HU150, 2013 HT150, 2013 HS150
C73Galati Obs. in Romania, 1 in MPEC 2013-Q29 -- 2013 QR1
C23Olmen Obs. in Belgium, 1 in MPEC 2013-Q29 -- 2013 QR1
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPEC 2013-Q29 -- 2013 AU76, 88188, 85713, 154268, 3352
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2013-Q29 -- 2013 QR1, 2013 OM9
Y00SONEAR Obs. in Brazil, 12 in MPEC 2013-Q29 -- 2013 QR1, 2013 KR1, 2010 UX95, 2006 EE1, 54789, 39565, 303262, 277475, 250614, 153349, 11405, 2063
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-Q29 -- 2013 QR1
718Wiggins Obs. in Utah, 1 in MPEC 2013-Q29 -- 2013 QR1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 August '13

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
2013 QU1JPL Sentry1512R E M O V E DJPL: Risk listing removed at 1202 UTC.
NEODyS1512R 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 25 August '13

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

2317Grabbed MPEC 2013-Q30 - 2013 HS150 - see above
Grabbed MPEC 2013-Q31 - 2013 HT150 - see above
Grabbed MPEC 2013-Q32 - 2013 HU150 - see above
1515Generated Traffic Report
1512Noted that JPL Sentry has removed 2013 QU1 as an impact risk - see above
Noted that NEODyS has removed 2013 QU1 as an impact risk - see above
Grabbed MPEC 2013-Q29 - Daily Orbit Update - see above