Contents  on 29 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 29 November '13

Four objects reported inside ten LD

There are four objects reported to be within ten lunar distances (LD) of Earth today, all of them outbound. Newly announced tiny intruder 2013 WH25 was between the Earth and Moon earlier today, passing the Earth at 0.35 LD. Further away, radar target 2013 NJ travels from 5.02 to 6.39 LD, 2013 WY from 7.94 to 8.45 LD, and radar target 2001 AV43 from 8.61 to 9.36 LD.

This report was updated at 1953 UTC with new discovery 2013 WH25 (MPEC) and first follow-up for departed risk-listed 2013 WM in today's DOU MPEC, along with follow-up for 2013 NJ and departed risk-listed 2013 VJ13. Today's first traffic report was generated at 1526 UTC.



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 29 November '13

The MPC's NEO Confirmation Page has 106 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 106 objects listed. Of these, 34 were "one nighters." The Tracking News counted a total of 145 listings on the NEOCP on this day.

New MPECs  on 29 November '13

Minor Planet Electronic Circulars

There were eight MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-W34 - "23:59 UT" - 2013 WV43


MPEC 2013-W33 - "23:54 UT" - 2013 WU43


MPEC 2013-W32 - "23:49 UT" - 2013 WT43


MPEC 2013-W31 - "23:44 UT" - 2013 WS43


MPEC 2013-W30 - "23:38 UT" - 2013 WR43


<< DOU on 29 Nov. '13 >>  MPEC 2013-W29 - "17:33 UT" - Daily Orbit Update


MPEC 2013-W28 - "16:35 UT" - 2006 XH1


MPEC 2013-W27 - "16:13 UT" - 2013 WH25

Observers  on 29 November '13

A total of 21 observers appeared in this day's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2013-W29, 2013-W31, 2013-W32, 2013-W33 & 2013-W34 -- 2013 WV43, 2013 WU43, 2013 WT43, 2013 WS43, 2013 UH9, 2013 TV135, 2013 SR24, 2004 GY, 9950
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2013-W29 -- 2010 CL19, 2005 RQ6, 363790, 111253, 8176
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2013-W29 & 2013-W32 -- 2013 WT43, 2013 VG13, 2013 MH7
Z65Corgas Obs., 2 in MPEC 2013-W29 -- 21088, 9950
P34Lvye Obs., 1 in MPEC 2013-W29 -- 2010 CL19
C94MASTER-II Obs. Tunka in Russia, 1 in MPEC 2013-W29 -- 2010 CL19
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2013-W29 -- 2013 UR3, 2013 TB80, 2013 SK19
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2013-W29 -- 2004 WK1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-W28 -- 2006 XH1
568=program code "=" on Mauna Kea in Hawaii, 2 in MPECs 2013-W32 & 2013-W33 -- 2013 WU43, 2013 WT43
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2013-W27, 2013-W29, 2013-W31, 2013-W33 & 2013-W34 -- 2013 WV43, 2013 WU43, 2013 WS43, 2013 WH25, 2013 VB14, 2013 UE3, 2013 JK22, 2010 CL19, 2004 WK1, 374038, 143651, 9950
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2013-W29 -- 8507, 6455
F51Pan-STARRS 1 (PS1) in Hawaii, 18 in MPECs 2013-W29, 2013-W30, 2013-W32, 2013-W33 & 2013-W34 -- 2013 WV43, 2013 WU43, 2013 WT43, 2013 WR43, 2013 WN, 2013 VZ9, 2013 VY9, 2013 VY13, 2013 VC10, 2013 UF5, 2013 SK19, 2009 WC52, 2007 LV19, 2006 SU131, 373393, 265661, 253106, 216985
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPEC 2013-W29 -- 2013 VY13, 2013 TV135, 2013 TH5, 2013 SK19, 2012 ER14, 2011 WM2, 2008 TQ2, 2005 RQ6, 361071, 249595
L04ROASTERR-1 Obs., 2 in MPEC 2013-W29 -- 2013 UR3, 2010 CL19
Q79Samford Valley Obs., 1 in MPEC 2013-W29 -- 2013 NJ
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-W32 -- 2013 WT43
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-W29 -- 376778
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2013-W29 & 2013-W30 -- 2013 WR43, 2013 WM, 2013 VZ4, 2013 VJ13, 2013 UX, 2013 UV10, 2008 VN
A84TUBITAK Natl. Obs. in Turkey, 1 in MPEC 2013-W29 -- 105140
926Tenagra II Obs. in Arizona, 1 in MPEC 2013-W30 -- 2013 WR43
I15Wishing Star Obs. in Rhode Island, 8 in MPEC 2013-W29 -- 2013 VD13, 2013 UR3, 2013 TB80, 2013 SK19, 2006 HU30, 251346, 142781, 3200
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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.
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 WMJPL Sentry20302047-210551.6e-06-4.61-4.740JPL: "Analysis based on 13 observations spanning 3.0165 days (2013-Nov-25.24629 to 2013-Nov-28.26279)." Diameter approximately 0.054 km. from mean, weighted H=24.0.
2013 VW13NEODyS15262063-2097181.41e-04-4.46-4.640NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2013-11-12.174 to 2013-11-26.405."
2013 VJ13JPL Sentry20302099-211261.1e-06-5.49-5.810JPL: "Analysis based on 44 observations spanning 18.179 days (2013-Nov-10.13475 to 2013-Nov-28.31334)." Diameter approximately 0.060 km. from mean, weighted H=23.7.
2013 VZ4JPL Sentry2030R E M O V E DJPL: Risk listing removed at 2002 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 29 November '13

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

0028 11/30Grabbed MPEC 2013-W34 - 2013 WV43 - see above
2359Grabbed MPEC 2013-W30 - 2013 WR43 - see above
Grabbed MPEC 2013-W31 - 2013 WS43 - see above
Grabbed MPEC 2013-W32 - 2013 WT43 - see above
Grabbed MPEC 2013-W33 - 2013 WU43 - see above
2030Noted that JPL Sentry has updated its 2013 VJ13 risk assessment - see above
Noted that JPL Sentry has removed 2013 VZ4 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 WM risk assessment - see above
1953Updated Traffic Report
1814Grabbed MPEC 2013-W27 - 2013 WH25 - see above
Grabbed MPEC 2013-W28 - 2006 XH1 - see above
Grabbed MPEC 2013-W29 - Daily Orbit Update - see above
1526Noted that NEODyS has updated its 2013 VW13 risk assessment - see above