Contents  on 8 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 8 September '13

Two objects reported inside ten LD

There are two visitors reported passing within ten lunar distances (LD) of Earth today. Risk-listed intruder 2013 RO30 is outbound from 7.54 to 9.61 LD and 2013 QE16 from 8.58 to 8.93 LD.

This report was generated at 1739 UTC with two new discoveries, both already departed: 2013 RE32 (MPEC) and intruder 2013 RF32 (MPEC, calculated with some uncertainty to have passed Earth at 0.44 LD on September 5th), and with follow-up in today's DOU MPEC for departed 2013 RO5 plus observation of distant radar target 152664 1998 FW4. Much earlier today JPL posted an orbit solution for 2013 RO30 (yesterday's MPEC), calculating an Earth passage of 0.76 LD on September 4th.



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 8 September '13

The MPC's NEO Confirmation Page has 9 listings

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

New MPECs  on 8 September '13

Minor Planet Electronic Circulars

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


MPEC 2013-R70 - "20:52 UT" - 2013 RC30


MPEC 2013-R69 - "14:49 UT" - 2013 RF32


MPEC 2013-R68 - "14:34 UT" - 2013 RE32


MPEC 2013-R67 - "14:30 UT" - 2013 RD32


MPEC 2013-R66 - "14:14 UT" - 2013 RC32


<< DOU on 8 Sept. '13 >>  MPEC 2013-R65 - "06:03 UT" - Daily Orbit Update

Observers  on 8 September '13

A total of 33 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 24 in MPECs 2013-R65, 2013-R66, 2013-R67 & 2013-R68 -- 2013 RY5, 2013 RU9, 2013 RS9, 2013 RR9, 2013 RO5, 2013 RO21, 2013 RN21, 2013 RM21, 2013 RK21, 2013 RK16, 2013 RE6, 2013 RE32, 2013 RE21, 2013 RD6, 2013 RD32, 2013 RC32, 2013 RA6, 2013 QM10, 2013 PN43, 2013 MP11, 2011 BA45, 1999 TC5, 249816, 194386
U82CS3 Palmer Divide Station in southern California, 1 in MPEC 2013-R65 -- 2013 QJ10
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2013-R66 & 2013-R68 -- 2013 RE32, 2013 RC32
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2013-R68 -- 2013 RE32
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2013-R68 -- 2013 RE32
K20Danastro Obs., 1 in MPEC 2013-R65 -- 2013 QJ10
151Eschenberg Obs. in Switzerland, 1 in MPEC 2013-R65 -- 2013 QJ10
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2013-R66 & 2013-R68 -- 2013 RE32, 2013 RC32
J95Great Shefford Obs. in England, 1 in MPEC 2013-R68 -- 2013 RE32
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2013-R68 -- 2013 RE32
046Klet Obs. in the Czech Republic, 18 in MPECs 2013-R65 & 2013-R68 -- 2013 RE32, 2013 QJ10, 2013 PV6, 2013 OM9, 2013 MX5, 2011 QD48, 88710, 66008, 340666, 26166, 250620, 162566, 162510, 159699, 152664, 6063, 2100, 1627
Q63LCOGT Siding Spring A in New South Wales, 1 in MPEC 2013-R66 -- 2013 RC32
K93LCOGT Sutherland C in South Africa, 2 in MPECs 2013-R67 & 2013-R70 -- 2013 RD32, 2013 RC30
130Lumezzane Obs. in Italy, 4 in MPEC 2013-R65 -- 2013 QJ10, 2013 MX5, 26166, 168378
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2013-R67 & 2013-R69 -- 2013 RF32, 2013 RD32
932McCarthy Obs. in Connecticut, 1 in MPEC 2013-R68 -- 2013 RE32
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2013-R68 -- 2013 RE32
118Modra Obs. in Slovakia, 1 in MPEC 2013-R68 -- 2013 RE32
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-R66 -- 2013 RC32
644NEAT's Mt. Palomar telescope in southern California, 3 in MPEC 2013-R65 -- 2002 SL, 2002 NW16, 2002 MX
C47Nonndorf Obs. in Austria, 1 in MPEC 2013-R68 -- 2013 RE32
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2013-R65 -- 162566, 3361
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2013-R67, 2013-R69 & 2013-R70 -- 2013 RF32, 2013 RD32, 2013 RC30
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2013-R65 -- 2013 QJ10, 2013 PX6, 2013 PV6, 2013 MX5, 2007 CN26, 329437
Y00SONEAR Obs. in Brazil, 8 in MPEC 2013-R65 -- 2008 KZ5, 39565, 303262, 242450, 137802, 137126, 11405, 4486
104San Marcello Pistoiese Obs. in Italy, 2 in MPECs 2013-R66 & 2013-R68 -- 2013 RE32, 2013 RC32
H36Sandlot Obs. in Kansas, 5 in MPECs 2013-R65, 2013-R66, 2013-R67 & 2013-R68 -- 2013 RV9, 2013 RE32, 2013 RD32, 2013 RC32, 1996 RY3
033Schwarzschild Obs. in Germany, 4 in MPECs 2013-R65, 2013-R66, 2013-R67 & 2013-R68 -- 2013 RE32, 2013 RD32, 2013 RC32, 1996 RY3
K90Sopot Obs., 3 in MPEC 2013-R65 -- 2013 QJ10, 2013 NX23, 2013 HG20
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2013-R66, 2013-R67, 2013-R68 & 2013-R70 -- 2013 RE32, 2013 RD32, 2013 RC32, 2013 RC30
B18Terskol Obs. in Russia, 1 in MPEC 2013-R68 -- 2013 RE32
A48Verona Obs. in Italy, 2 in MPEC 2013-R65 -- 2013 QJ10, 2009 DM1
A79Zvezdno Obshtestvo Obs. in Bulgaria, 2 in MPECs 2013-R66 & 2013-R68 -- 2013 RE32, 2013 RC32
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 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 RC32JPL Sentry1706208711.2e-07-5.78-5.780JPL: "Analysis based on 50 observations spanning 2.5609 days (2013-Sep-05.42596 to 2013-Sep-07.98682)." Diameter approximately 0.130 km. from mean, weighted H=22.0.
2013 RN21JPL Sentry1546R E M O V E DJPL: Risk listing removed at 1001 UTC.
2013 RA6JPL Sentry1546R E M O V E DJPL: Risk listing removed at 1000 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 8 September '13

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

2111Grabbed MPEC 2013-R70 - 2013 RC30 - see above
1739Generated Traffic Report
1706Noted that JPL Sentry has posted 2013 RC32 as an impact risk - see above
1546Noted that JPL Sentry has removed 2013 RA6 as an impact risk - see above
Noted that JPL Sentry has removed 2013 RN21 as an impact risk - see above
Grabbed MPEC 2013-R65 - Daily Orbit Update - see above
Grabbed MPEC 2013-R66 - 2013 RC32 - see above
Grabbed MPEC 2013-R67 - 2013 RD32 - see above
Grabbed MPEC 2013-R68 - 2013 RE32 - see above
Grabbed MPEC 2013-R69 - 2013 RF32 - see above