Contents  on 1 September '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 1 September '13

One object reported inside ten LD

One object is reported passing within ten lunar distances (LD) of Earth today. Newly announced 2013 QE16 is inbound from 9.39 to 8.94 LD.

This report was generated at 1609 UTC with follow-up in today's DOU MPEC for departed objects 2013 QG11 and 2013 PR43, and with the discovery announced late yesterday of 2013 QE16 (MPEC)

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 1 September '13

The MPC's NEO Confirmation Page has 74 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 74 objects listed. Of these, 27 were "one nighters." So far The Tracking News has counted a total of 92 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 1 September '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-R04 - "19:36 UT" - 2013 QN17

MPEC 2013-R03 - "16:52 UT" - 2013 QH17

MPEC 2013-R02 - "16:46 UT" - 2013 QG17

<< DOU on 1 Sept. '13 >>  MPEC 2013-R01 - "06:06 UT" - Daily Orbit Update

Observers  on 1 September '13

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPEC 2013-R01 -- 2013 QV1, 2013 QC11, 2013 OV2, 2013 GZ79
I74Baxter Garden Obs. in England, 1 in MPEC 2013-R01 -- 2013 PW6
U82CS3 Palmer Divide Station in southern California, 1 in MPEC 2013-R01 -- 2006 EE1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2013-R02 & 2013-R03 -- 2013 QH17, 2013 QG17
G58Chabot Obs. in northern California, 2 in MPEC 2013-R01 -- 2013 QN10, 2013 QD11
448Desert Moon Obs. in New Mexico, 7 in MPEC 2013-R01 -- 2013 QK6, 2013 PU13, 2013 OM9, 2010 DJ56, 354182, 162679, 162566
C73Galati Obs. in Romania, 1 in MPEC 2013-R01 -- 361071
J95Great Shefford Obs. in England, 1 in MPEC 2013-R04 -- 2013 QN17
D00ISON-Kislovodsk Obs., 2 in MPEC 2013-R01 -- 368664, 269690
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-R02 -- 2013 QG17
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2013-R01 -- 2010 EX119, 2005 LP40
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2013-R01 & 2013-R03 -- 2013 QY1, 2013 QH17
474Mt. John Obs. in New Zealand, 25 in MPEC 2013-R01 -- 2013 QV1, 2013 QU1, 2013 QN11, 2013 QN10, 2013 QM10, 2013 QL10, 2013 QH11, 2013 QH10, 2013 QG11, 2013 QF11, 2013 QE11, 2013 QD11, 2013 QC11, 2013 QB11, 2013 PY38, 2013 PW14, 2013 PR43, 2013 PO43, 2013 PC7, 2013 PA7, 2013 OU3, 2013 MP11, 2013 LK25, 2012 VH5, 2009 BE2
Q61PROMPT A in New South Wales, 6 in MPECs 2013-R01, 2013-R02 & 2013-R04 -- 2013 QN17, 2013 QG17, 354182, 351545, 351278, 333889
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2013-R01, 2013-R02, 2013-R03 & 2013-R04 -- 2013 QN17, 2013 QH17, 2013 QG17, 2013 PU31, 2013 BO76, 2008 PH9, 2007 SW2, 2007 RV17, 2006 KD1, 52768, 359369, 162195, 3352
C95SATINO-1 in France, 1 in MPEC 2013-R01 -- 2013 PW6
Y00SONEAR Obs. in Brazil, 18 in MPECs 2013-R01 & 2013-R02 -- 2013 QG17, 2013 OM9, 2010 UX95, 2009 WE253, 2009 DM1, 2006 EE1, 54789, 52762, 39565, 303262, 271480, 243147, 17182, 159609, 153349, 140039, 11405, 2063
461SZTE Asteroid Program in Hungary, 1 in MPEC 2013-R01 -- 196256
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2013-R04 -- 2013 QN17
I76Tesla Obs. in Spain, 3 in MPEC 2013-R01 -- 2013 QJ10, 2013 PX6, 2013 HG20
A79Zvezdno Obshtestvo Obs. in Bulgaria, 1 in MPEC 2013-R04 -- 2013 QN17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 September '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 QN11JPL Sentry1559R E M O V E DJPL: Risk listing removed at 1213 UTC.

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 1 September '13

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

2109Grabbed MPEC 2013-R04 - 2013 QN17 - see above
1701Grabbed MPEC 2013-R02 - 2013 QG17 - see above
Grabbed MPEC 2013-R03 - 2013 QH17 - see above
1609Generated Traffic Report
1559Noted that JPL Sentry has removed 2013 QN11 as an impact risk - see above
Grabbed MPEC 2013-R01 - Daily Orbit Update - see above