Contents  on 2 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 2 September '13

One object reported inside ten LD

There is one asteroid reported traveling inside a radius of ten lunar distances (LD) from our planet today. 2013 QE16 is inbound from 8.94 to 8.58 LD.

This report was generated at 1401 UTC with the first follow-up for 2013 QE16 in today's DOU 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 2 September '13

The MPC's NEO Confirmation Page has 77 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 77 objects listed. Of these, fifteen 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 2 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-R08 - "20:57 UT" - 2013 QJ36

MPEC 2013-R07 - "17:28 UT" - 2013 RE

MPEC 2013-R06 - "17:24 UT" - 2013 RF

<< DOU on 2 Sept. '13 >>  MPEC 2013-R05 - "06:03 UT" - Daily Orbit Update

Observers  on 2 September '13

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 2 in MPECs 2013-R06 & 2013-R07 -- 2013 RF, 2013 RE
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2013-R06, 2013-R07 & 2013-R08 -- 2013 RF, 2013 RE, 2013 QJ36
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2013-R05, 2013-R06 & 2013-R07 -- 2013 RF, 2013 RE, 2013 QE16, 2013 PV6, 2013 PB39, 2011 QD48, 2008 PH9, 2002 RH52, 52768, 20826, 143678, 142464, 10115, 8013, 4197, 3691
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2013-R05 -- 2013 PA7, 2013 LF1, 2013 BJ18, 2010 DJ56
448Desert Moon Obs. in New Mexico, 6 in MPEC 2013-R05 -- 2013 OO5, 2008 SQ1, 2003 ND, 1998 QR52, 280136, 137125
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2013-R05 -- 137126
K48Keyhole Obs., 4 in MPEC 2013-R05 -- 2013 QJ10, 2010 TN54, 350988, 21088
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-R07 -- 2013 RE
J75La Sagra Obs. in Spain, 1 in MPEC 2013-R08 -- 2013 QJ36
I36Los Campitos Obs. in Argentina, 1 in MPEC 2013-R06 -- 2013 RF
A06Mataro Obs. in Spain, 1 in MPEC 2013-R05 -- 2013 PX6
474Mt. John Obs. in New Zealand, 10 in MPECs 2013-R05 & 2013-R06 -- 2013 RF, 2013 QV1, 2013 QU1, 2013 QM10, 2013 QH11, 2013 QC11, 2013 PY38, 2013 PF67, 2013 PD26, 2013 LV28
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2013-R05 & 2013-R08 -- 2013 QJ36, 2013 PU13, 247517, 163250
F51Pan-STARRS 1 (PS1) in Hawaii, 17 in MPEC 2013-R05 -- 2013 QK6, 2013 OP3, 2013 AU76, 2010 CC180, 2006 KD1, 2006 EE1, 2005 LW, 85713, 54789, 366615, 303262, 231792, 20826, 163250, 7088, 5653, 2201
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2013-R05 -- 2013 QJ10, 2013 OM9, 2013 BO76, 2010 TN54, 2010 CF19, 2009 WE253, 2009 DM1, 2009 CP5, 2003 OB4
J53Posadas Obs. in Spain, 1 in MPEC 2013-R05 -- 137126
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 2 in MPECs 2013-R07 & 2013-R08 -- 2013 RE, 2013 QJ36
Y00SONEAR Obs. in Brazil, 1 in MPEC 2013-R06 -- 2013 RF
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-R08 -- 2013 QJ36
G403program code 3 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-R05 -- 137126
K90Sopot Obs., 1 in MPEC 2013-R05 -- 2010 TN54
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-R05 -- 2013 QN11
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2013-R06, 2013-R07 & 2013-R08 -- 2013 RF, 2013 RE, 2013 QJ36
A79Zvezdno Obshtestvo Obs. in Bulgaria, 3 in MPECs 2013-R06, 2013-R07 & 2013-R08 -- 2013 RF, 2013 RE, 2013 QJ36
H068program code 8 via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-R05 -- 2007 CN26
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-R06 -- 2013 RF
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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 RFJPL Sentry20242091-2112221.5e-05-3.77-4.310JPL: "Analysis based on 39 observations spanning 1.1375 days (2013-Sep-01.34833 to 2013-Sep-02.48584)." Diameter approximately 0.094 km. from mean, weighted H=22.8.

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 2 September '13

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

2104Grabbed MPEC 2013-R08 - 2013 QJ36 - see above
2024Noted that JPL Sentry has posted 2013 RF as an impact risk - see above
1801Grabbed MPEC 2013-R06 - 2013 RF - see above
Grabbed MPEC 2013-R07 - 2013 RE - see above
1401Generated Traffic Report
1400Grabbed MPEC 2013-R05 - Daily Orbit Update - see above