Contents  on 4 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 4 November '13

Five objects reported inside ten LD

There are five objects reported moving within a radius of ten lunar distances (LD) from Earth today. Newly discovered 2013 VG2 comes its closest to our planet on this passage, reaching 2.63 LD at 2356 UT. 2013 UJ9 is outbound from 7.40 to 9.06 LD and intruder 2013 UX2 from 8.02 to 8.86 LD, while 2013 UE1 enters ten LD, traveling from 10.94 to 9.56 LD and newly announced 2013 VH2 also comes inside, passing from 10.79 to 9.76 LD.

Headed our way next, radar target 2001 AV43 arrives inside ten LD on November 6th, 2011 JY1 arrives on November 11th, and radar target 2013 NJ on November 19th.

This report was updated at 2155 UTC with new discoveries 2013 VH2 (MPEC) and 2013 VG2 (MPEC). Today's first traffic report was generated at 1752 UTC with follow-up in today's DOU MPEC for 2013 UJ9, 2013 UE1, and 2011 JY1.



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 4 November '13

The MPC's NEO Confirmation Page has 37 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 37 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 63 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 4 November '13

Minor Planet Electronic Circulars

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


MPEC 2013-V22 - "18:24 UT" - 2013 VM2


MPEC 2013-V21 - "18:19 UT" - 2013 VL2


MPEC 2013-V20 - "18:14 UT" - 2013 VK2


MPEC 2013-V19 - "18:08 UT" - 2013 VJ2


MPEC 2013-V18 - "18:03 UT" - 2013 VH2


MPEC 2013-V17 - "17:57 UT" - 2013 VG2


MPEC 2013-V16 - "17:51 UT" - 2013 VF2


MPEC 2013-V15 - "15:22 UT" - 2010 VE1


<< DOU on 4 Nov. '13 >>  MPEC 2013-V14 - "06:04 UT" - Daily Orbit Update

Observers  on 4 November '13

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

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2013-V19 -- 2013 VJ2
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2013-V14, 2013-V16, 2013-V17, 2013-V18, 2013-V19, 2013-V20 & 2013-V21 -- 2013 VL2, 2013 VK2, 2013 VJ2, 2013 VH2, 2013 VG2, 2013 VF2, 2013 TW68, 2006 FD51, 85938
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-V14 -- 2013 UH5
703Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2013-V14, 2013-V17 & 2013-V19 -- 2013 VJ2, 2013 VG2, 243147
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2013-V14 & 2013-V17 -- 2013 VG2, 2013 UP8, 2013 UH9, 2013 UG9, 2013 TL135, 2013 RY5, 2013 RH74, 2013 RB74, 2012 FR62, 2010 LJ14
639Dresden Obs. in Germany, 2 in MPEC 2013-V14 -- 2013 TB80, 1981
I48El Catalejo Obs. in Argentina, 1 in MPEC 2013-V17 -- 2013 VG2
Z81Estrella de Mar Obs., 3 in MPEC 2013-V14 -- 2013 UH5, 52760, 142781
734Farpoint Obs. in Kansas, 1 in MPEC 2013-V19 -- 2013 VJ2
V37LCOGT Fort Davis in Texas, 1 in MPEC 2013-V14 -- 2013 TV135
J75La Sagra Obs. in Spain, 1 in MPEC 2013-V22 -- 2013 VM2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2013-V17, 2013-V18 & 2013-V19 -- 2013 VJ2, 2013 VH2, 2013 VG2
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-V15 -- 2010 VE1
932McCarthy Obs. in Connecticut, 1 in MPEC 2013-V22 -- 2013 VM2
474Mt. John Obs. in New Zealand, 11 in MPECs 2013-V14 & 2013-V17 -- 2013 VG2, 2013 UR3, 2013 UK5, 2013 UJ9, 2013 UH9, 2013 UG9, 2013 UF5, 2013 UE1, 2013 UD1, 2013 TU135, 2009 VA1
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2013-V17, 2013-V18, 2013-V19, 2013-V20 & 2013-V21 -- 2013 VL2, 2013 VK2, 2013 VJ2, 2013 VH2, 2013 VG2
G34Oberfrauendorf Obs., 1 in MPEC 2013-V14 -- 2013 UR3
X14Orbis Tertius Obs., 2 in MPEC 2013-V14 -- 138095, 1627
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-V16 -- 2013 VF2
C27Pallerols Obs. in Spain, 1 in MPEC 2013-V14 -- 3988
I41Palomar Transient Factory (PTF) in southern California, 3 in MPEC 2013-V14 -- 2013 UG5, 30825, 275545
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPEC 2013-V14 -- 2013 TE6, 2011 JY1, 2009 WC52, 370688
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 14 in MPEC 2013-V14 -- 2013 UH9, 2013 TV135, 2013 TH5, 2013 SK19, 2012 ER14, 2010 XZ67, 2008 HO3, 2008 FT6, 2006 WJ3, 2006 HU30, 2005 RQ6, 85774, 53435, 52760
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-V17 -- 2013 VG2
C95SATINO-1 in France, 2 in MPECs 2013-V19 & 2013-V22 -- 2013 VM2, 2013 VJ2
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2013-V17 -- 2013 VG2
K90Sopot Obs., 1 in MPEC 2013-V14 -- 2013 OM9
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2013-V14 -- 2013 UZ, 2013 UC3
J08Zonalunar Obs. in Spain, 1 in MPEC 2013-V22 -- 2013 VM2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 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 VF2JPL Sentry20472015-21132443.3e-07-4.09-4.740JPL: "Analysis based on 7 observations spanning 1.2964 days (2013-Nov-01.90546 to 2013-Nov-03.201901)." Diameter approximately 0.182 km. from mean, weighted H=21.3.
2013 TV135JPL Sentry17212032-204724.9e-08-4.27-4.270JPL: "Analysis based on 566 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.
2013 NE24NEODyS1721R E M O V E D-
2012 RU16NEODyS17212032-208931.95e-07-7.23-7.410NEODyS: "Based on 56 optical observations (of which 0 are rejected as outliers) from 2012-09-15.350 to 2012-10-10.444."
2012 LJNEODyS17212051-207224.25e-06-5.52-5.540NEODyS: "Based on 53 optical observations (of which 6 are rejected as outliers) from 2012-06-09.399 to 2012-06-10.904."
2011 CF66NEODyS17212038-2112913.66e-06-6.88-7.280NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2011-02-13.341 to 2011-02-13.518."
2011 AH5NEODyS17212074-208343.16e-06-6.15-6.390NEODyS: "Based on 54 optical observations (of which 1 are rejected as outliers) from 2011-01-08.340 to 2011-01-12.554."
2008 EM68NEODyS17212011-21122286.73e-06-5.81-6.130NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008-03-08.252 to 2008-03-08.363."
99942 Apophis (2004 MN4)NEODyS17212068-2116102.3e-06-3.59-3.67-NEODyS: "Based on 4105 optical observations (of which 87 are rejected as outliers) from 2004-03-15.109 to 2013-05-07.150."
101955 Bennu (1999 RQ36)NEODyS17212169-219987.12e-04-1.12-1.52-NEODyS: "Based on 290 optical observations (of which 8 are rejected as outliers) from 1999-09-11.407 to 2006-05-26.200, and also on 13 radar data points from 1999-09-21 to 2005-10-02."

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 4 November '13

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

2155Updated Traffic Report
2047Noted that JPL Sentry has posted 2013 VF2 as an impact risk - see above
1912Grabbed MPEC 2013-V16 - 2013 VF2 - see above
Grabbed MPEC 2013-V17 - 2013 VG2 - see above
Grabbed MPEC 2013-V18 - 2013 VH2 - see above
Grabbed MPEC 2013-V19 - 2013 VJ2 - see above
Grabbed MPEC 2013-V20 - 2013 VK2 - see above
Grabbed MPEC 2013-V21 - 2013 VL2 - see above
Grabbed MPEC 2013-V22 - 2013 VM2 - see above
1721Noted that NEODyS has updated its 99942 Apophis (2004 MN4) risk assessment - see above
Noted that NEODyS has updated its 2008 EM68 risk assessment - see above
Noted that NEODyS has updated its 2011 AH5 risk assessment - see above
Noted that NEODyS has updated its 2011 CF66 risk assessment - see above
Noted that NEODyS has updated its 2012 LJ risk assessment - see above
Noted that NEODyS has updated its 2012 RU16 risk assessment - see above
Noted that NEODyS has removed 2013 NE24 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 TV135 risk assessment - see above
Grabbed MPEC 2013-V14 - Daily Orbit Update - see above
Grabbed MPEC 2013-V15 - 2010 VE1 - see above