Contents  on 27 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 27 August '13

No objects reported inside ten LD

There are no objects reported moving inside a radius of ten lunar distances (LD) from our planet today, and none are known to be coming into that range until mid-November.

This report was generated at 1510 UTC with follow-up in today's DOU MPEC for departed objects 2013 PE21 and radar target 277475 2005 WK4, plus observation of distant 2012 QG42. We also note that JPL today removed its one impact solution for 2013 QW1 (traffic report), which has been identified as a human artifact, a rocket from the Chinese Chang'e 2 lunar mission.

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 27 August '13

The MPC's NEO Confirmation Page has 26 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 26 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 27 August '13

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.

MPEC 2013-Q37 - "14:27 UT" - Comet P/2013 P5 (Panstarrs)

<< DOU on 27 Aug. '13 >>  MPEC 2013-Q36 - "06:02 UT" - Daily Orbit Update

Observers  on 27 August '13

Thirteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2013-Q36 & 2013-Q37 -- 2013 QV1, 2013 QU1, 2013 PZ38, 2013 PX6, 2013 PW14, 2013 PV6, 2013 PU13, 2013 PO43, 2013 PC7, 2013 PB39, 2013 PA7, P/2013 P5, 2013 NX23, 2013 NK, 2013 MX5, 2013 HG20, 2013 BO76, 2006 XJ1, 350988, 24445, 168378, 9950, 1627
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-Q36 -- 137126
U82CS3 Palmer Divide Station in southern California, 2 in MPEC 2013-Q36 -- 2013 OM9, 329437
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-Q36 -- 7088
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 14 in MPEC 2013-Q36 -- 2013 QV1, 2013 PU13, 2013 PO43, 2013 PF67, 2013 PE21, 2013 PD21, 2013 PC39, 2013 PB39, 2013 NX, 2013 NP8, 2013 LF7, 2010 EH43, 2008 YX32, 2005 RO33
006Fabra Obs. in Spain, 1 in MPEC 2013-Q36 -- 153349
W87LCOGT Cerro Tololo C in Chile, 1 in MPEC 2013-Q37 -- P/2013 P5
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2013-Q37 -- P/2013 P5
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-Q37 -- P/2013 P5
C23Olmen Obs. in Belgium, 1 in MPEC 2013-Q36 -- 137126
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2013-Q36 & 2013-Q37 -- P/2013 P5, 2003 OB4, 359369, 308043, 143678
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2013-Q36 -- 2013 PX6, 2013 OM9, 2013 BO76, 2010 UX95, 2010 TN54, 2010 CF19, 2009 CP5, 2006 EE1
Y00SONEAR Obs. in Brazil, 16 in MPEC 2013-Q36 -- 2013 KR1, 2013 AU76, 2012 QG42, 2010 AF30, 2006 EE1, 86039, 52768, 52760, 277475, 25330, 247517, 232691, 192563, 137802, 137126, 4486
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 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 QW1JPL Sentry1500R E M O V E D-
2013 PS13JPL Sentry02272096-210525.0e-06-6.46-6.470JPL: "Analysis based on 75 observations spanning 1.2298 days (2013-Aug-07.9199 to 2013-Aug-09.149675)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
2013 NE24JPL Sentry01282051-2112166.1e-06-6.57-6.890JPL: "Analysis based on 6 observations spanning 1.0048 days (2013-Jul-14.49054 to 2013-Jul-15.495357)." Diameter approximately 0.011 km. from mean, weighted H=27.4.

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 27 August '13

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

1510Generated Traffic Report
1500Noted that JPL Sentry has removed 2013 QW1 as an impact risk - see above
Grabbed MPEC 2013-Q36 - Daily Orbit Update - see above
Grabbed MPEC 2013-Q37 - Comet P/2013 P5 (Panstarrs) - see above
0227Noted that JPL Sentry has updated its 2013 PS13 risk assessment - see above
0128Noted that JPL Sentry has updated its 2013 NE24 risk assessment - see above