Contents  on 7 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 7 September '13

Two objects reported inside ten LD

Two objects are reported passing within ten lunar distances (LD) of our planet today. 2013 RQ5 departs from inside ten LD, moving from 6.04 to 10.02 LD, and 2013 QE16 is outbound from 8.33 to 8.58 LD.

This report was updated at 2336 UTC to note follow-up in today's DOU MPEC for 2013 QE16 and departed objects 2013 RO5 and 2013 QM48, plus observation of distant radar target 152664 1998 FW4. We are also waiting for JPL to publish an orbit solution for 2013 RO30 (MPEC), which the Minor Planet Center is reporting to be inside ten LD now. Today's first traffic report was generated at 0437 UTC with the discovery announced late yesterday of already departed 2013 RY29 (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 7 September '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, eight were "one nighters." So far The Tracking News has counted a total of 30 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 7 September '13

Minor Planet Electronic Circulars

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

MPEC 2013-R64 - "19:55 UT" - 2013 RO30

MPEC 2013-R63 - "18:31 UT" - 2013 RN30

MPEC 2013-R62 - "14:23 UT" - 2004 VB17

<< DOU on 7 Sept. '13 >>  MPEC 2013-R61 - "06:04 UT" - Daily Orbit Update

MPEC 2013-R60 - "00:15 UT" - 1996 RY3

Observers  on 7 September '13

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2013-R60, 2013-R61, 2013-R63 & 2013-R64 -- 2013 RY5, 2013 RV9, 2013 RS9, 2013 RR9, 2013 RO5, 2013 RO30, 2013 RN30, 2013 RM21, 2013 RK16, 2013 RE21, 2013 RD6, 2013 RB6, 2013 QN11, 2013 QM48, 2013 QJ36, 2013 PB39, 2013 OO2, 2013 NK, 1996 RY3, 190788
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2013-R60 -- 1996 RY3
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-R60 -- 1996 RY3
U82CS3 Palmer Divide Station in southern California, 2 in MPEC 2013-R61 -- 350988, 168378
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2013-R60, 2013-R61 & 2013-R64 -- 2013 RO30, 2001 QC34, 1996 RY3, 368664, 368184, 355256, 354182, 152664
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-R61 -- 2013 RV5
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2013-R60 -- 1996 RY3
448Desert Moon Obs. in New Mexico, 3 in MPEC 2013-R61 -- 2013 PA7, 2008 GE1, 2007 RU17
151Eschenberg Obs. in Switzerland, 1 in MPEC 2013-R60 -- 1996 RY3
Z81Estrella de Mar Obs., 1 in MPEC 2013-R61 -- 2013 QJ36
006Fabra Obs. in Spain, 2 in MPEC 2013-R61 -- 361071, 21088
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-R60 -- 1996 RY3
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2013-R60 -- 1996 RY3
D00ISON-Kislovodsk Obs., 1 in MPEC 2013-R61 -- 159699
046Klet Obs. in the Czech Republic, 16 in MPEC 2013-R61 -- 2013 QJ10, 2013 PV6, 2013 MX5, 2013 HG20, 2013 BO76, 2009 WE253, 66008, 52762, 355256, 340666, 219071, 20826, 162510, 152664, 105140, 6063
C01Lohrmann Obs. in Germany, 1 in MPEC 2013-R61 -- 2009 DM1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-R62 -- 2004 VB17
932McCarthy Obs. in Connecticut, 1 in MPEC 2013-R60 -- 1996 RY3
474Mt. John Obs. in New Zealand, 6 in MPEC 2013-R61 -- 2013 RF, 2013 RC6, 2013 QN48, 2013 PY38, 2013 PU31, 2013 PD21
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2013-R61 -- 1998 QB28, 304153, 269690, 16960
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2013-R61 -- 2002 JA9
A24New Millennium Obs. in Italy, 1 in MPEC 2013-R60 -- 1996 RY3
C47Nonndorf Obs. in Austria, 1 in MPEC 2013-R61 -- 1996 RY3
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-R61 -- 368664
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-R63 -- 2013 RN30
461SZTE Asteroid Program in Hungary, 1 in MPEC 2013-R60 -- 1996 RY3
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-R61 -- 2013 RM21
C48Sayn Solar Obs. in Russia, 1 in MPEC 2013-R60 -- 1996 RY3
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-R60 -- 1996 RY3
033Schwarzschild Obs. in Germany, 1 in MPEC 2013-R61 -- 2010 XZ67
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-R61 -- 1999 SK10
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2013-R60, 2013-R61, 2013-R63 & 2013-R64 -- 2013 RW5, 2013 RV9, 2013 RU9, 2013 RO30, 2013 RO21, 2013 RN30, 2013 RN21, 2013 RD21, 2013 QN10, 2013 QK48, 2013 QE16, 2013 MY5, 2013 FX7, 2005 XJ8, 1996 RY3
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2013-R60 -- 1996 RY3
I42Westport Obs. in Massachusetts, 3 in MPEC 2013-R61 -- 2013 OM9, 2013 BO76, 2012 TS
198Wildberg Obs. in Germany, 1 in MPEC 2013-R60 -- 1996 RY3
A79Zvezdno Obshtestvo Obs. in Bulgaria, 1 in MPEC 2013-R60 -- 1996 RY3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 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 RO30JPL Sentry2359208321.7e-07-8.63-8.800JPL: "Analysis based on 11 observations spanning 1.9833 days (2013-Sep-05.4254 to 2013-Sep-07.408726)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
2013 RN21JPL Sentry1540211213.7e-09-7.07-7.070JPL: "Analysis based on 13 observations spanning 1.9134 days (2013-Sep-04.45887 to 2013-Sep-06.37226)." Diameter approximately 0.170 km. from mean, weighted H=21.6.
2013 RFJPL Sentry1540209721.4e-07-5.82-6.030JPL: "Analysis based on 63 observations spanning 6.9605 days (2013-Aug-30.43539 to 2013-Sep-06.39594)." Diameter approximately 0.092 km. from mean, weighted H=22.8.
2013 QM48JPL Sentry15402071-2113354.4e-05-5.87-6.580JPL: "Analysis based on 11 observations spanning 6.7756 days (2013-Aug-30.46095 to 2013-Sep-06.236501)." 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 7 September '13

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

2359Noted that JPL Sentry has posted 2013 RO30 as an impact risk - see above
2336Updated Traffic Report
2059Grabbed MPEC 2013-R64 - 2013 RO30 - see above
1921Grabbed MPEC 2013-R63 - 2013 RN30 - see above
1540Noted that JPL Sentry has updated its 2013 QM48 risk assessment - see above
Noted that JPL Sentry has updated its 2013 RF risk assessment - see above
Noted that JPL Sentry has updated its 2013 RN21 risk assessment - see above
Grabbed MPEC 2013-R61 - Daily Orbit Update - see above
Grabbed MPEC 2013-R62 - 2004 VB17 - see above
0018Grabbed MPEC 2013-R60 - 1996 RY3 - see above