Contents  on 21 October '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 21 October '13

One object reported inside ten LD

There is one asteroid reported to be flying within ten lunar distances (LD) of Earth today. Risk-listed radar target 2013 UB exits Earth's Hill sphere, flying from 3.23 to 4.83 LD.

Radar target 2001 AV43 arrives inside ten LD on November 6th and radar target 2013 NJ follows on November 19th.

This report was generated at 1502 UTC.



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.

Radar Astrometry  on 21 October '13

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2305 UTC when the database was dated 21 Oct.

NEOCP Activity  on 21 October '13

The MPC's NEO Confirmation Page has 18 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eighteen objects listed. Of these, eight were "one nighters."

New MPECs  on 21 October '13

Minor Planet Electronic Circulars

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


<< OOC on 21 Oct. '13 >> MPEC 2013-U17 - "17:39 UT" - Observations and Orbits of Comets


<< DOU on 21 Oct. '13 >>  MPEC 2013-U16 - "06:02 UT" - Daily Orbit Update

Observers  on 21 October '13

A total of 52 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 14 in MPEC 2013-U17 -- P/2013 O2, C/2013 E2, C/2012 X1, C/2012 K8, C/2011 L4, C/2010 U3, C/2010 S1, 246P, 184P, 154P, 102P, 52P, 17P, 4P
J24Altamira Obs. in the Canary Islands, 2 in MPEC 2013-U17 -- C/2013 R1, C/2012 S1
J57Alto Turia Obs. in Spain, 1 in MPEC 2013-U17 -- C/2010 S1
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPEC 2013-U16 -- 2013 TV135, 2013 TB6, 2013 SK19, 2013 SC25, 2012 ER14, 2011 QD48, 2010 XZ67, 2010 GY6, 2008 FT6, 85818, 65733, 39565, 350751, 252793, 251346, 162566, 159399, 142781, 9950, 6063, 3691, 1981, 1627
C86Blanes Obs. in Spain, 2 in MPEC 2013-U17 -- C/2012 F6, C/2010 S1
B96Brixiis Obs. in Belgium, 2 in MPEC 2013-U17 -- C/2013 R1, C/2012 S1
W96Campo Catino Austral Obs. (CAO) in Chile, 5 in MPEC 2013-U17 -- C/2013 R1, P/2013 CU129, C/2012 V2, C/2012 S1, 154P
I72Carpe Noctem Obs., 13 in MPEC 2013-U17 -- C/2013 R1, P/2013 J2, C/2012 S1, C/2012 F6, C/2011 L4, C/2010 S1, 290P, 257P, 154P, 119P, 84P, 4P, 2P
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-U17 -- 52P
470Ceccano Obs. in Italy, 3 in MPECs 2013-U16 & 2013-U17 -- 2013 TV135, C/2013 R1, C/2012 S1
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2013-U16 -- 2013 TW135, 2013 SV19, 2013 SL30, 2013 RJ74, 2013 QG17, 2013 HG20, 2011 PT1
A77Chante-Perdrix Obs. in France, 3 in MPEC 2013-U17 -- C/2012 S1, 154P, 2P
0953S. Nazarov via Crimean Astrophysical Obs. in the Ukraine, 1 in MPEC 2013-U16 -- 2013 TV135
448Desert Moon Obs. in New Mexico, 4 in MPEC 2013-U16 -- 2013 SR24, 2010 GY6, 2008 HO3, 355046
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPEC 2013-U16 -- 2013 TV135, 8014
I57Elche Obs., 3 in MPEC 2013-U17 -- C/2013 R1, C/2012 S1, 154P
E105Richard Miles in England via Faulkes Telescope South in New South Wales, 2 in MPEC 2013-U17 -- C/2012 C1, C/2011 F1
372Geisei Obs. in Japan, 2 in MPEC 2013-U17 -- C/2013 S1, C/2013 E2
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2013 UB
048Hradec Kralove Obs. in the Czech Republic, 3 in MPEC 2013-U17 -- C/2012 S3, C/2012 F6, C/2010 S1
987Isle of Man Obs. on the Isle of Man, 1 in MPEC 2013-U17 -- 2P
D95Kurihara Obs. in Japan, 6 in MPEC 2013-U17 -- C/2013 R1, C/2012 S1, C/2011 L4, C/2011 J2, C/2010 S1, 2P
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2013-U17 -- P/2013 R3
V37LCOGT Fort Davis in Texas, 1 in MPEC 2013-U16 -- 2013 TV135
G38La Senda Obs., 2 in MPECs 2013-U16 & 2013-U17 -- P/2013 J2, 88710
J38La Vara Obs. in Spain, 11 in MPEC 2013-U17 -- C/2013 R1, C/2013 A1, C/2012 S1, C/2012 F6, C/2010 S1, 290P, 257P, 154P, 119P, 4P, 2P
A02Masia Cal Maciarol Modul 8 (MCM8) in Spain, 4 in MPEC 2013-U17 -- C/2013 R1, P/2013 O2, 119P, 4P
152Moletai Obs. in Lithuania, 1 in MPEC 2013-U17 -- C/2012 S1
945Monte Deva Obs. in Spain, 3 in MPEC 2013-U17 -- C/2013 E2, C/2012 S1, C/2012 F6
900Moriyama Obs. in Japan, 8 in MPEC 2013-U17 -- C/2013 R1, C/2013 E2, C/2013 A1, C/2012 S1, C/2012 A2, 291P, 290P, 257P
E07Murrumbateman Obs. in New South Wales, 1 in MPEC 2013-U17 -- C/2012 S4
D81Nagano Obs. in Japan, 2 in MPEC 2013-U17 -- C/2011 J2, 290P
A24New Millennium Obs. in Italy, 13 in MPECs 2013-U16 & 2013-U17 -- P/2013 J2, C/2012 S4, C/2012 J1, C/2012 F6, C/2010 S1, 251346, 162566, 9950, 6063, 290P, 257P, 119P, 2P
C47Nonndorf Obs. in Austria, 6 in MPEC 2013-U17 -- P/2013 J2, C/2012 F6, C/2012 A2, C/2011 L4, C/2010 S1, 257P
C23Olmen Obs. in Belgium, 3 in MPEC 2013-U17 -- C/2013 R1, C/2012 S1, 2P
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2013-U16 & 2013-U17 -- P/2013 R3, 253106
A32Panker Obs. in Germany, 5 in MPEC 2013-U17 -- C/2013 G8, C/2012 S4, C/2010 S1, C/2008 S3, 257P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2013-U17 -- C/2013 R1, P/2013 J2, C/2012 F6, C/2010 S1, 290P, 154P, 4P
L04ROASTERR-1 Obs., 1 in MPEC 2013-U17 -- C/2012 F6
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2013-U17 -- C/2012 S1
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-U17 -- C/2011 L4
G25Sherbrooke Obs., 1 in MPEC 2013-U16 -- 252373
G404program code 4 via Slooh.com Canary Islands Obs. in the Canary Islands, 8 in MPEC 2013-U17 -- C/2013 R1, C/2013 A1, C/2012 S1, C/2012 F6, C/2009 F4, 184P, 154P, 2P
K90Sopot Obs., 11 in MPECs 2013-U16 & 2013-U17 -- 2013 TV135, C/2013 R1, P/2013 J2, C/2012 S1, C/2012 F6, C/2010 S1, 290P, 257P, 154P, 84P, 4P
673!Jana Pittichova via Table Mtn. Obs. in southern California, 1 in MPEC 2013-U16 -- 2013 TV135
926Tenagra II Obs. in Arizona, 7 in MPEC 2013-U16 -- 2013 TV135, 2013 TU135, 2013 TS132, 2013 TR132, 2013 TN69, 2013 SW24, 2013 SV24
2905Richard P. Boyle via Vatican Advanced Technology Telescope in Arizona, 1 in MPEC 2013-U17 -- C/2012 S1
718Wiggins Obs. in Utah, 1 in MPEC 2013-U16 -- 2013 TV135
C42Xingming Obs. in China, 2 in MPEC 2013-U17 -- C/2013 R1, C/2012 S1
J08Zonalunar Obs. in Spain, 3 in MPEC 2013-U17 -- C/2013 R1, 290P, 154P
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-U17 -- C/2012 S1
H06#M. Suzuki via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-U17 -- C/2012 S1
H06%Ernesto Guido in Italy via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-U17 -- C/2012 X1
H068program code 8 via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-U16 -- 2013 TV135
H06`Erik Bryssinck in Belgium via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-U17 -- C/2012 S1
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 2 in MPEC 2013-U17 -- C/2012 X1, 2P
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 5 in MPEC 2013-U17 -- C/2013 G9, C/2013 G6, C/2012 L2, C/2011 A3, 74P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 October '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 TV135JPL Sentry18312032-204725.5e-05-1.22-1.221JPL: "Analysis based on 180 observations spanning 11.614 days (2013-Oct-08.85531 to 2013-Oct-20.46947)." Diameter approximately 0.440 km. from mean, weighted H=19.4.
NEODyS14592032-204721.2e-04-0.88-0.881NEODyS: "Based on 182 optical observations (of which 2 are rejected as outliers) from 2013-10-08.856 to 2013-10-20.470."
2013 SC25NEODyS1459R 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 21 October '13

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

2305Noted Radar Astrometry database update - see above
1831Noted that JPL Sentry has updated its 2013 TV135 risk assessment - see above
Grabbed MPEC 2013-U17 - Observations and Orbits of Comets - see above
1502Generated Traffic Report
1459Noted that NEODyS has removed 2013 SC25 as an impact risk - see above
Noted that NEODyS has updated its 2013 TV135 risk assessment - see above
Grabbed MPEC 2013-U16 - Daily Orbit Update - see above