Contents  on 5 November '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 5 November '13

Five objects reported inside ten LD

Five objects are reported passing within ten lunar distances (LD) of our home world today. 2013 VG2 exits Earth's Hill sphere, passing from 2.63 to 3.90 LD. Further away, 2013 UE1 is inbound from 9.56 to 8.44 LD and 2013 VH2 from 9.76 to 9.01 LD, while intruder 2013 UX2 is outbound from 8.86 to 9.70 LD and 2013 UJ9 leaves ten LD, traveling from 9.06 to 10.86 LD.

Coming toward our ten-LD reporting "bubble" next, radar target 2001 AV43 arrives inside ten LD tomorrow, 2011 JY1 arrives on November 11th, and radar target 2013 NJ on November 19th.

This report was generated at 1626 UTC with follow-up in today's DOU MPEC for 2011 JY1 and departed 2013 UQ5.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 5 November '13

The MPC's NEO Confirmation Page has 40 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 40 objects listed. Of these, 31 were "one nighters." So far The Tracking News has counted a total of 50 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 5 November '13

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-V28 - "19:02 UT" - 2013 VQ4

MPEC 2013-V27 - "18:56 UT" - 2013 VP4

MPEC 2013-V26 - "18:51 UT" - 2013 VO4

MPEC 2013-V25 - "18:47 UT" - 2013 VN4

MPEC 2013-V24 - "18:40 UT" - 2013 VM4

<< DOU on 5 Nov. '13 >>  MPEC 2013-V23 - "06:05 UT" - Daily Orbit Update

Observers  on 5 November '13

A total of 23 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2013-V23, 2013-V24 & 2013-V25 -- 2013 VN4, 2013 VM4, 2013 UR5, 2013 UM5, 2013 UH9, 2013 UE3, 2013 TW135
L22Barlad Obs., 1 in MPEC 2013-V23 -- 142781
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2013-V23 & 2013-V24 -- 2013 VM4, 2013 UQ4, 2013 MX5, 2010 TN54, 2008 SQ1, 2008 JR26, 65733, 39565, 355256, 220909, 159399, 6063, 5143, 3691, 1981
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 16 in MPECs 2013-V23, 2013-V24, 2013-V26, 2013-V27 & 2013-V28 -- 2013 VQ4, 2013 VP4, 2013 VO4, 2013 VM4, 2013 VK, 2013 UR8, 2013 UL9, 2013 UH9, 2013 UG9, 2013 SG25, 2013 QG17, 2013 PU31, 2010 DW1, 2001 WW1, 55532, 3102
1211Yu. N. Krugly via Chuguevskaya Station in the Ukraine, 1 in MPEC 2013-V23 -- 3361
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-V23 -- 2013 UQ5
Z81Estrella de Mar Obs., 2 in MPEC 2013-V23 -- 85818, 18109
006Fabra Obs. in Spain, 3 in MPEC 2013-V23 -- 251346, 162566, 142781
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-V23 -- 2013 TE6
Q64LCOGT Siding Spring B in New South Wales, 1 in MPEC 2013-V24 -- 2013 VM4
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2013-V24 & 2013-V25 -- 2013 VN4, 2013 VM4
474Mt. John Obs. in New Zealand, 2 in MPECs 2013-V23 & 2013-V24 -- 2013 VM4, 2013 MH7
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2013-V23, 2013-V26 & 2013-V27 -- 2013 VP4, 2013 VO4, 2013 UF3, 2008 WN2, 2005 UM5
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2013-V23 & 2013-V28 -- 2013 VQ4, 2013 UC, 2013 PV6, 2013 NP8, 2006 HU30, 2006 AL3, 2005 VR, 2000 KA, 370688, 170903, 142563
D29Purple Mtn. Obs. Xuyi Station in China, 6 in MPEC 2013-V23 -- 2013 RE6, 2003 OB4, 1999 SK10, 374851, 26166, 3361
071Rhozen Obs. in Bulgaria, 1 in MPEC 2013-V23 -- 2013 TV135
204Schiaparelli Obs. in Italy, 6 in MPEC 2013-V23 -- 2013 TL69, 2013 SE21, 2013 RM43, 2013 RH74, 2005 BW1, 1990 UP
645Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2013-V23 -- 2010 VE1
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2013-V23 & 2013-V25 -- 2013 VN4, 2013 TE6, 2011 JY1
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2013-V23, 2013-V24 & 2013-V25 -- 2013 VN4, 2013 VM4, 2013 TT135
673!Jana Pittichova via Table Mtn. Obs. in southern California, 1 in MPEC 2013-V24 -- 2013 VM4
926Tenagra II Obs. in Arizona, 2 in MPECs 2013-V24 & 2013-V25 -- 2013 VN4, 2013 VM4
I42Westport Obs. in Massachusetts, 1 in MPEC 2013-V23 -- 2013 SC25
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 November '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 VQ4JPL Sentry2128201811.7e-10-6.69-6.690JPL: "Analysis based on 7 observations spanning .84687 days (2013-Nov-04.43095 to 2013-Nov-05.27782)." Diameter approximately 0.200 km. from mean, weighted H=21.2.
2013 VP4JPL Sentry21572098-211239.4e-09-7.92-7.940JPL: "Analysis based on 12 observations spanning 1.0276 days (2013-Nov-04.22644 to 2013-Nov-05.25402)." Diameter approximately 0.047 km. from mean, weighted H=24.3.
2013 TV135JPL Sentry16242032-204723.6e-08-4.40-4.410JPL: "Analysis based on 626 observations spanning 21.435 days (2013-Oct-12.9551 to 2013-Nov-03.390298)." Diameter approximately 0.440 km. from mean, weighted H=19.4.
NEODyS16242032-204722.92e-07-3.50-3.510NEODyS: "Based on 667 optical observations (of which 41 are rejected as outliers) from 2013-10-08.856 to 2013-11-03.391."
2013 TV132NEODyS16242099-211123.63e-07-7.52-7.670NEODyS: "Based on 33 optical observations (of which 1 are rejected as outliers) from 2013-10-12.400 to 2013-11-02.394."

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 5 November '13

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

2157Noted that JPL Sentry has posted 2013 VP4 as an impact risk - see above
2128Noted that JPL Sentry has posted 2013 VQ4 as an impact risk - see above
1905Grabbed MPEC 2013-V24 - 2013 VM4 - see above
Grabbed MPEC 2013-V25 - 2013 VN4 - see above
Grabbed MPEC 2013-V26 - 2013 VO4 - see above
Grabbed MPEC 2013-V27 - 2013 VP4 - see above
Grabbed MPEC 2013-V28 - 2013 VQ4 - see above
1626Generated Traffic Report
1624Noted that NEODyS has updated its 2013 TV132 risk assessment - see above
Noted that JPL Sentry has updated its 2013 TV135 risk assessment - see above
Noted that NEODyS has updated its 2013 TV135 risk assessment - see above
Grabbed MPEC 2013-V23 - Daily Orbit Update - see above