Contents  on 19 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 19 August '13

No objects reported inside ten LD

No asteroids are reported traveling inside ten lunar distances (LD) of Earth today. Up next, 2013 QR1 arrives inside ten LD on August 25th.

This report was generated at 1459 UTC with follow-up in today's DOU MPEC for 2013 QR1 and departed objects 2013 PR43 and 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 19 August '13

The MPC's NEO Confirmation Page has 31 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 31 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 33 listings on the NEOCP today.

New MPECs  on 19 August '13

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 2013-Q18 - "21:28 UT" - 2013 QV1

MPEC 2013-Q17 - "21:24 UT" - 2013 QU1

<< DOU on 19 Aug. '13 >>  MPEC 2013-Q16 - "06:04 UT" - Daily Orbit Update

Observers  on 19 August '13

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPEC 2013-Q16 -- 2013 PW6, 85804, 340666
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2013-Q16 -- 24445
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-Q16 -- 2013 PW6
160Castelmartini Obs. in Italy, 1 in MPEC 2013-Q17 -- 2013 QU1
470Ceccano Obs. in Italy, 1 in MPEC 2013-Q16 -- 2013 QR1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2013-Q17 & 2013-Q18 -- 2013 QV1, 2013 QU1
203GiaGa Obs. in Italy, 2 in MPECs 2013-Q16 & 2013-Q17 -- 2013 QU1, 285263
844Los Molinos Obs. in Uruguay, 6 in MPEC 2013-Q16 -- 2009 CP5, 52762, 277475, 17182, 168378, 3691
5682David Tholen's team on Mauna Kea in Hawaii, 4 in MPEC 2013-Q16 -- 2013 OO2, 2013 NP8, 2013 NA15, 2013 GH84
I41Palomar Transient Factory (PTF) in southern California, 3 in MPEC 2013-Q16 -- 276786, 275677, 251346
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2013-Q16, 2013-Q17 & 2013-Q18 -- 2013 QV1, 2013 QU1, 2013 OP3, 2005 AD3, 340666
461SZTE Asteroid Program in Hungary, 1 in MPEC 2013-Q16 -- 3988
233San Vito Obs. in Italy, 3 in MPEC 2013-Q16 -- 308043, 243147, 11405
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-Q18 -- 2013 QV1
204Schiaparelli Obs. in Italy, 9 in MPECs 2013-Q16, 2013-Q17 & 2013-Q18 -- 2013 QV1, 2013 QU1, 2013 PW14, 2013 PV13, 2013 PU13, 2013 PR43, 2011 QD48, 2009 QO5, 2006 UD63
673!Jana Pittichova via Table Mtn. Obs. in southern California, 1 in MPEC 2013-Q16 -- 2013 PH10
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 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 Sentry23122038-2110152.4e-08-5.44-5.640JPL: "Analysis based on 16 observations spanning 2.6071 days (2013-Aug-16.33939 to 2013-Aug-18.94649)." Diameter approximately 0.190 km. from mean, weighted H=21.3.
2012 XK134JPL Sentry0020206519.6e-08-7.90-7.900JPL: "Analysis based on 41 observations spanning 30.313 days (2012-Dec-13.14593 to 2013-Jan-12.459216)." Diameter approximately 0.018 km. from mean, weighted H=26.4.

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 19 August '13

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

2312Noted that JPL Sentry has posted 2013 QU1 as an impact risk - see above
2233Grabbed MPEC 2013-Q17 - 2013 QU1 - see above
Grabbed MPEC 2013-Q18 - 2013 QV1 - see above
1459Generated Traffic Report
1458Grabbed MPEC 2013-Q16 - Daily Orbit Update - see above
0020Noted that JPL Sentry has reposted 2012 XK134 as an impact risk - see above