Contents  on 30 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 30 November '13

Four objects reported inside ten LD

Four visitors are reported flying within ten lunar distances (LD) of our planet today. Intruder 2013 WH25 is outbound from 4.52 to 9.18 LD, radar target 2013 NJ from 6.39 to 7.82 LD, 2013 WY from 8.45 to 9.03 LD, and radar target 2001 AV43 departs from inside ten LD, moving from 9.36 to 10.11 LD.

On approach next, newly announced 2013 WV43 arrives inside ten LD tomorrow.

This report was generated at 1921 UTC with a new discovery from very late yesterday, 2013 WV43 (MPEC), and from today the already departed discoveries 2013 WY43 (MPEC) and risk-listed 2013 WZ44 (MPEC) and 2013 WX44 (MPEC), as well as follow-up in today's DOU MPEC for 2013 NJ and departed risk-listed objects 2013 WM and 2013 VM5.



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 30 November '13

The MPC's NEO Confirmation Page has 78 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 78 objects listed. Of these, 24 were "one nighters." So far The Tracking News has counted a total of 103 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 30 November '13

Minor Planet Electronic Circulars

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


<< DOU on 30 Nov. '13 >>  MPEC 2013-W51 - "17:32 UT" - Daily Orbit Update


MPEC 2013-W50 - "14:25 UT" - 2013 WZ44


MPEC 2013-W49 - "14:18 UT" - 2013 WY44


MPEC 2013-W48 - "14:09 UT" - 2013 WX44


MPEC 2013-W47 - "14:02 UT" - 2013 WW44


MPEC 2013-W46 - "13:53 UT" - 2013 WV44


MPEC 2013-W45 - "13:45 UT" - 2013 WU44


MPEC 2013-W44 - "13:38 UT" - 2013 WT44


MPEC 2013-W43 - "13:30 UT" - 2013 WS44


MPEC 2013-W42 - "13:19 UT" - 2013 WR44


MPEC 2013-W41 - "00:39 UT" - 2013 WD44


MPEC 2013-W40 - "00:33 UT" - 2013 WC44


MPEC 2013-W39 - "00:27 UT" - 2013 WB44


MPEC 2013-W38 - "00:23 UT" - 2013 WA44


MPEC 2013-W37 - "00:17 UT" - 2013 WZ43


MPEC 2013-W36 - "00:10 UT" - 2013 WY43


MPEC 2013-W35 - "00:04 UT" - 2013 WX43

Observers  on 30 November '13

A total of 27 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-W44 -- 2013 WT44
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2013-W35, 2013-W36, 2013-W37, 2013-W38, 2013-W40, 2013-W41, 2013-W45, 2013-W46, 2013-W47, 2013-W49, 2013-W50 & 2013-W51 -- 2013 WZ44, 2013 WZ43, 2013 WY44, 2013 WY43, 2013 WX43, 2013 WW44, 2013 WV44, 2013 WU44, 2013 WM, 2013 WD44, 2013 WC44, 2013 WA44, 2013 VM13, 2013 VA14, 2013 UR3, 2013 UN5, 2013 UH9, 2013 LM31, 2005 LS3, 153792
160Castelmartini Obs. in Italy, 9 in MPEC 2013-W51 -- 2013 UR3, 2010 XZ67, 2010 CL19, 2006 HU30, 1997 WQ23, 340666, 215188, 138852, 138095
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2013-W44 & 2013-W50 -- 2013 WZ44, 2013 WT44
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2013-W35, 2013-W39, 2013-W44, 2013-W50 & 2013-W51 -- 2013 WZ44, 2013 WX43, 2013 WT44, 2013 WB44, 2013 VP12, 2013 VD13, 2013 UH9
Z81Estrella de Mar Obs., 3 in MPEC 2013-W51 -- 2013 VY13, 375103, 6178
J95Great Shefford Obs. in England, 3 in MPECs 2013-W48, 2013-W49 & 2013-W51 -- 2013 WY44, 2013 WX44, 2013 WU43
355Hadano Obs. in Japan, 1 in MPEC 2013-W51 -- 2013 NJ
130Lumezzane Obs. in Italy, 8 in MPEC 2013-W51 -- 2013 UR3, 2013 TL117, 2013 TB80, 2010 XZ67, 2003 WX25, 1997 WQ23, 162566, 8014
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2013-W35, 2013-W36, 2013-W39, 2013-W42, 2013-W43 & 2013-W44 -- 2013 WY43, 2013 WX43, 2013 WT44, 2013 WS44, 2013 WR44, 2013 WB44
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-W51 -- 2013 VM5
568=program code "=" on Mauna Kea in Hawaii, 3 in MPECs 2013-W40, 2013-W45 & 2013-W47 -- 2013 WW44, 2013 WU44, 2013 WC44
C91Montevenere Obs., 4 in MPEC 2013-W51 -- 2010 XZ67, 162566, 138095, 1981
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2013-W36, 2013-W37, 2013-W38, 2013-W41, 2013-W49, 2013-W50 & 2013-W51 -- 2013 WZ44, 2013 WZ43, 2013 WY44, 2013 WY43, 2013 WD44, 2013 WA44, 39565
A24New Millennium Obs. in Italy, 2 in MPECs 2013-W45 & 2013-W47 -- 2013 WW44, 2013 WU44
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-W40 -- 2013 WC44
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-W51 -- 5587
F51Pan-STARRS 1 (PS1) in Hawaii, 18 in MPECs 2013-W35, 2013-W39, 2013-W40, 2013-W42, 2013-W43, 2013-W45, 2013-W46, 2013-W47, 2013-W48 & 2013-W51 -- 2013 WX44, 2013 WX43, 2013 WW44, 2013 WV44, 2013 WU44, 2013 WS44, 2013 WR44, 2013 WR43, 2013 WC44, 2013 WB44, 2013 RB74, 2011 CQ4, 2008 UW5, 2000 JO78, 1999 SK10, 373579, 276786, 17511
D29Purple Mtn. Obs. Xuyi Station in China, 10 in MPEC 2013-W51 -- 2013 WS43, 2013 TS4, 2011 CQ4, 2011 BO24, 2009 HB, 2006 HU30, 85818, 378124, 377097, 349507
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-W47 -- 2013 WW44
H36Sandlot Obs. in Kansas, 5 in MPECs 2013-W36, 2013-W40, 2013-W45, 2013-W47 & 2013-W49 -- 2013 WY44, 2013 WY43, 2013 WW44, 2013 WU44, 2013 WC44
589Santa Lucia Stroncone Obs. in Italy, 1 in MPEC 2013-W51 -- 2013 NJ
204Schiaparelli Obs. in Italy, 6 in MPECs 2013-W36, 2013-W37, 2013-W38, 2013-W40, 2013-W45 & 2013-W49 -- 2013 WZ43, 2013 WY44, 2013 WY43, 2013 WU44, 2013 WC44, 2013 WA44
033Schwarzschild Obs. in Germany, 2 in MPECs 2013-W42 & 2013-W43 -- 2013 WS44, 2013 WR44
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-W46 -- 2013 WV44
926Tenagra II Obs. in Arizona, 6 in MPECs 2013-W35, 2013-W40, 2013-W42, 2013-W45, 2013-W47 & 2013-W48 -- 2013 WX44, 2013 WX43, 2013 WW44, 2013 WU44, 2013 WR44, 2013 WC44
I76Tesla Obs. in Spain, 1 in MPEC 2013-W51 -- 2010 CL19
I42Westport Obs. in Massachusetts, 4 in MPEC 2013-W51 -- 2013 VD13, 2013 UR3, 2013 TL117, 2013 TB80
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 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 WZ44JPL Sentry16312111-2112102.0e-06-6.27-6.970JPL: "Analysis based on 22 observations spanning 1.8418 days (2013-Nov-28.411 to 2013-Nov-30.25279)." Diameter approximately 0.025 km. from mean, weighted H=25.6.
2013 WX44JPL Sentry1631207112.4e-07-7.10-7.100JPL: "Analysis based on 13 observations spanning 2.6628 days (2013-Nov-27.50384 to 2013-Nov-30.1666)." Diameter approximately 0.023 km. from mean, weighted H=25.9.
2013 WV44JPL Sentry16312015-2112341.5e-08-6.53-6.840JPL: "Analysis based on 12 observations spanning 1.9534 days (2013-Nov-27.3572 to 2013-Nov-29.310622)." Diameter approximately 0.078 km. from mean, weighted H=23.2.
2013 WA44JPL Sentry05052022-2113989.3e-06-3.98-4.110JPL: "Analysis based on 16 observations spanning .87191 days (2013-Nov-28.40133 to 2013-Nov-29.273243)." Diameter approximately 0.082 km. from mean, weighted H=23.1.
2013 WT43NEODyS16312051-2111231.5e-06-4.26-4.860NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2013-11-26.322 to 2013-11-28.142."
JPL Sentry03042051-2111211.6e-06-4.23-4.790JPL: "Analysis based on 16 observations spanning 1.8205 days (2013-Nov-26.32112 to 2013-Nov-28.141605)." Diameter approximately 0.110 km. from mean, weighted H=22.4.
2013 WR43NEODyS16312059-205912.6e-11-9.23-9.230NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2013-11-25.304 to 2013-11-29.166."
2013 WMJPL Sentry21202047-210541.8e-06-4.56-4.750JPL: "Analysis based on 16 observations spanning 3.9493 days (2013-Nov-25.24629 to 2013-Nov-29.195582)." Diameter approximately 0.055 km. from mean, weighted H=24.0.
NEODyS16312041-210551.6e-06-4.62-4.810NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2013-11-25.247 to 2013-11-28.264."
2013 VJ13NEODyS16312099-210979.27e-07-5.56-5.860NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2013-11-10.136 to 2013-11-28.314."
2013 VM5JPL Sentry2005R E M O V E DJPL: Risk listing removed at 2002 UTC.
2010 XRJPL Sentry0304R E M O V E D-

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 30 November '13

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

2120Noted that JPL Sentry has updated its 2013 WM risk assessment - see above
2005Noted that JPL Sentry has removed 2013 VM5 as an impact risk - see above
1921Generated Traffic Report
1811Grabbed MPEC 2013-W51 - Daily Orbit Update - see above
1631Noted that NEODyS has updated its 2013 VJ13 risk assessment - see above
Noted that NEODyS has updated its 2013 WM risk assessment - see above
Noted that NEODyS has posted 2013 WR43 as an impact risk - see above
Noted that NEODyS has posted 2013 WT43 as an impact risk - see above
Noted that JPL Sentry has posted 2013 WV44 as an impact risk - see above
Noted that JPL Sentry has posted 2013 WX44 as an impact risk - see above
Noted that JPL Sentry has posted 2013 WZ44 as an impact risk - see above
Grabbed MPEC 2013-W42 - 2013 WR44 - see above
Grabbed MPEC 2013-W43 - 2013 WS44 - see above
Grabbed MPEC 2013-W44 - 2013 WT44 - see above
Grabbed MPEC 2013-W45 - 2013 WU44 - see above
Grabbed MPEC 2013-W46 - 2013 WV44 - see above
Grabbed MPEC 2013-W47 - 2013 WW44 - see above
Grabbed MPEC 2013-W48 - 2013 WX44 - see above
Grabbed MPEC 2013-W49 - 2013 WY44 - see above
Grabbed MPEC 2013-W50 - 2013 WZ44 - see above
0505Noted that JPL Sentry has posted 2013 WA44 as an impact risk - see above
0304Noted that JPL Sentry has removed 2010 XR as an impact risk - see above
Noted that JPL Sentry has posted 2013 WT43 as an impact risk - see above
0057Grabbed MPEC 2013-W39 - 2013 WB44 - see above
Grabbed MPEC 2013-W40 - 2013 WC44 - see above
Grabbed MPEC 2013-W41 - 2013 WD44 - see above
0028Grabbed MPEC 2013-W35 - 2013 WX43 - see above
Grabbed MPEC 2013-W36 - 2013 WY43 - see above
Grabbed MPEC 2013-W37 - 2013 WZ43 - see above
Grabbed MPEC 2013-W38 - 2013 WA44 - see above