Contents  on 9 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 9 September '13

Two objects reported inside ten LD

Two asteroids are reported moving within a radius of ten lunar distances (LD) from our home world today. 2013 QE16 is outbound from 8.93 to 9.37 LD, and risk-listed intruder 2013 RO30 departs ten LD, passing from 9.61 to 11.69 LD.

This report was generated at 1526 UTC with observation of distant radar target 152664 1998 FW4 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 9 September '13

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, nine were "one nighters." So far The Tracking News has counted a total of 21 listings on the NEOCP today.

New MPECs  on 9 September '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-R72 - "20:58 UT" - Comet C/2013 R1 (Lovejoy)


<< DOU on 9 Sept. '13 >>  MPEC 2013-R71 - "06:03 UT" - Daily Orbit Update

Observers  on 9 September '13

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2013-R72 -- C/2013 R1
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2013-R71 -- 2012 TS
I47Auger Obs. in Argentina, 1 in MPEC 2013-R72 -- C/2013 R1
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2013-R71 -- 2010 TN54
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2013-R71 -- 2013 QU1, 2013 QH48
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2013-R72 -- C/2013 R1
Z81Estrella de Mar Obs., 1 in MPEC 2013-R71 -- 250620
006Fabra Obs. in Spain, 1 in MPEC 2013-R71 -- 137126
J95Great Shefford Obs. in England, 1 in MPEC 2013-R71 -- 2012 TS
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-R71 -- 3361
046Klet Obs. in the Czech Republic, 7 in MPEC 2013-R71 -- 2013 QJ10, 2013 OM9, 66008, 340666, 250620, 162510, 152664
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-R71 -- 152664
950.Ovidiu Vaduvescu via La Palma in the Canary Islands, 4 in MPEC 2013-R71 -- 2010 XZ67, 2009 UW2, 2008 TN26, 2001 GM2
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2013-R71 -- 2013 CL118, 2013 BE27
C91Montevenere Obs., 1 in MPEC 2013-R71 -- 2009 WE253
474Mt. John Obs. in New Zealand, 6 in MPEC 2013-R71 -- 2013 RB30, 2013 QH48, 2013 QH10, 2013 QC11, 2013 PY38, 2013 PU31
I41Palomar Transient Factory (PTF) in southern California, 4 in MPEC 2013-R71 -- 2013 RB6, 326946, 251346, 152664
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-R71 -- 2012 TS
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2013-R71 -- 2013 QJ10, 2013 OM9, 2013 MX5, 2010 UX95, 2010 TN54, 2001 QC34, 250620, 137126
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-R71 & 2013-R72 -- C/2013 R1, 2012 TS
033Schwarzschild Obs. in Germany, 2 in MPEC 2013-R71 -- 2013 RR9, 2013 RE
K90Sopot Obs., 1 in MPEC 2013-R71 -- 2007 CN26
J84South Obs. in England, 1 in MPEC 2013-R71 -- 1996 RY3
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2013-R71 -- 2013 QJ10
E27Thornlands Obs. in Queensland, 1 in MPEC 2013-R72 -- C/2013 R1
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2013-R72 -- C/2013 R1
A79Zvezdno Obshtestvo Obs. in Bulgaria, 3 in MPECs 2013-R71 & 2013-R72 -- C/2013 R1, 2012 TS, 159699
I896program code 6 via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2013-R72 -- C/2013 R1
Q62&program code "&" (15) via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-R72 -- C/2013 R1
Q620program code 0 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-R72 -- C/2013 R1
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-R72 -- C/2013 R1
Q622program code 2 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-R72 -- C/2013 R1
Q623program code 3 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-R72 -- C/2013 R1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2013 RO30NEODyS15182055-2105141.25e-04-5.81-5.870NEODyS: "Based on 11 optical observations (of which 1 are rejected as outliers) from 2013-09-05.426 to 2013-09-07.410."
2013 RN21NEODyS1518R E M O V E D-
2013 RV9NEODyS1518R E M O V E D-
2013 QM48NEODyS15182071-2112561.72e-05-6.28-6.950NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2013-08-30.462 to 2013-09-06.237."

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 9 September '13

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

2134Grabbed MPEC 2013-R72 - Comet C/2013 R1 (Lovejoy) - see above
1526Generated Traffic Report
1518Noted that NEODyS has updated its 2013 QM48 risk assessment - see above
Noted that NEODyS has removed 2013 RN21 as an impact risk - see above
Noted that NEODyS has posted 2013 RO30 as an impact risk - see above
Noted that NEODyS has removed 2013 RV9 as an impact risk - see above
Grabbed MPEC 2013-R71 - Daily Orbit Update - see above