Contents  on 26 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 26 August '13

One object reported inside ten LD

One object is reported to be within ten lunar distances (LD) of Earth today. Radar target 2013 QR1 exits ten LD, moving from 8.33 to 11.71 LD. No other catalogued objects are known to be coming this close until mid-November.

This report was generated at 1400 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 26 August '13

The MPC's NEO Confirmation Page has 17 listings

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

New MPECs  on 26 August '13

Minor Planet Electronic Circulars

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

MPEC 2013-Q35 - "17:54 UT" - 2013 QK6

MPEC 2013-Q34 - "16:15 UT" - Comet C/2013 P4 (Panstarrs)

<< DOU on 26 Aug. '13 >>  MPEC 2013-Q33 - "06:02 UT" - Daily Orbit Update

Observers  on 26 August '13

Thirteen observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 2 in MPEC 2013-Q33 -- 2013 PR43, 2013 PB39
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2013-Q34 & 2013-Q35 -- 2013 QK6, C/2013 P4
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2013-Q33, 2013-Q34 & 2013-Q35 -- 2013 QK6, 2013 PD21, C/2013 P4, 2013 CN222
E102Ernesto Guido in Italy via Faulkes Telescope South in New South Wales, 1 in MPEC 2013-Q34 -- C/2013 P4
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2013-Q35 -- 2013 QK6
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPECs 2013-Q33 & 2013-Q34 -- C/2013 P4, 2013 NV, 2013 NJ15
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2013-Q33, 2013-Q34 & 2013-Q35 -- 2013 QK6, C/2013 P4, 2012 LK2
C95SATINO-1 in France, 1 in MPEC 2013-Q33 -- 2013 QR1
Y00SONEAR Obs. in Brazil, 24 in MPEC 2013-Q33 -- 2013 BO76, 2010 UX95, 2009 WE253, 2009 CP5, 2008 KZ5, 2006 EE1, 86829, 54789, 52762, 39565, 365071, 303262, 277475, 243147, 242450, 215188, 17182, 163696, 159609, 11405, 4957, 3352, 2063, 1685
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-Q34 & 2013-Q35 -- 2013 QK6, C/2013 P4
204Schiaparelli Obs. in Italy, 16 in MPEC 2013-Q33 -- 2013 PY6, 2013 PV13, 2013 OV2, 2013 NP11, 2013 NK, 2013 NH10, 2013 GZ79, 2013 ET9, 2011 BN24, 2010 NY65, 2010 GY6, 2009 WE253, 2008 HO3, 2000 YO29, 369264, 243147
J84South Obs. in England, 1 in MPEC 2013-Q33 -- 2013 QR1
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-Q34 -- C/2013 P4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 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 HT150NEODyS13592025-2112781.98e-05-4.98-5.680NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2013-04-16.337 to 2013-04-19.200."
JPL Sentry00372022-21121222.0e-05-4.99-5.710JPL: "Analysis based on 10 observations spanning 2.8625 days (2013-Apr-16.3367 to 2013-Apr-19.19918)." Diameter approximately 0.026 km. from mean, weighted H=25.6.

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 26 August '13

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

1755Grabbed MPEC 2013-Q35 - 2013 QK6 - see above
1726Grabbed MPEC 2013-Q34 - Comet C/2013 P4 (Panstarrs) - see above
1400Generated Traffic Report
1359Noted that NEODyS has posted 2013 HT150 as an impact risk - see above
Grabbed MPEC 2013-Q33 - Daily Orbit Update - see above
0037Noted that JPL Sentry has posted 2013 HT150 as an impact risk - see above