Contents  on 16 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 16 October '13

Three objects reported inside ten LD

There are three objects reported to be within ten lunar distances (LD) of Earth today. 2013 TM127 is outbound from 5.95 to 8.28 LD and risk-listed intruder 2013 RZ53 from 9.10 to 9.43 LD, and risk-listed 2013 TX68 exits ten LD, moving from 9.99 to 12.77 LD.

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

This report was generated at 1435 UTC with follow-up in today's DOU MPEC for 2001 AV43 and departed intruder 2013 TL127.

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 16 October '13

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, eight were "one nighters." So far The Tracking News has counted a total of 21 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 16 October '13

Minor Planet Electronic Circulars

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

MPEC 2013-U03 - "10:50 UT" - 2013 TV135

MPEC 2013-U02 - "10:44 UT" - 2013 TW135

<< DOU on 16 Oct. '13 >>  MPEC 2013-U01 - "06:04 UT" - Daily Orbit Update

Observers  on 16 October '13

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 29 in MPECs 2013-U01 & 2013-U02 -- 2013 TY5, 2013 TW135, 2013 TS4, 2013 TN127, 2013 TL69, 2013 TL, 2013 TE6, 2013 TE, 2013 TD4, 2013 TB80, 2013 TB6, 2013 SW24, 2013 SR, 2013 SK19, 2013 SE21, 2013 RZ73, 2013 RE21, 2013 OM9, 2013 MX5, 2010 SL13, 2008 TD4, 2008 FT6, 2007 VH186, 2005 EF, 2001 QC34, 2000 UW13, 2000 RV37, 1995 OO, 355256
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-U03 -- 2013 TV135
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2013-U01 -- 2003 ND, 371660, 351545, 254417, 17511, 162273, 162210, 10115
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-U02 -- 2013 TW135
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2013-U01 -- 2013 TL127
0954program code 4 via Crimean Astrophysical Obs. in the Ukraine, 1 in MPEC 2013-U03 -- 2013 TV135
E105Richard Miles in England via Faulkes Telescope South in New South Wales, 1 in MPEC 2013-U02 -- 2013 TW135
J95Great Shefford Obs. in England, 1 in MPEC 2013-U03 -- 2013 TV135
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2013-U02 -- 2013 TW135
C32Ka-Dar Obs. TAU Station in Russia, 2 in MPECs 2013-U01 & 2013-U03 -- 2013 TV135, 2013 SW24
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2013-U01 -- 2001 AV43
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2013-U02 -- 2013 TW135
C94MASTER-II Obs. Tunka in Russia, 2 in MPECs 2013-U01 & 2013-U03 -- 2013 TV135, 162566
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-U01 -- 3908
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2013-U01 & 2013-U02 -- 2013 TW135, 17511
A24New Millennium Obs. in Italy, 2 in MPECs 2013-U02 & 2013-U03 -- 2013 TW135, 2013 TV135
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2013-U01 -- 2010 VD1, 251346
B49Paus Obs. in Spain, 1 in MPEC 2013-U03 -- 2013 TV135
C48Sayn Solar Obs. in Russia, 1 in MPEC 2013-U02 -- 2013 TW135
G403program code 3 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-U01 -- 3361
G404program code 4 via Canary Islands Obs. in the Canary Islands, 2 in MPEC 2013-U01 -- 2013 TB80, 2013 RH74
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2013-U01 -- 2013 TS4, 2013 SE21
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2013-U01 -- 2013 TW68, 2013 TS4, 2013 TJ135, 2013 TG4, 2013 TD4, 2013 SG25, 2013 SB21
926Tenagra II Obs. in Arizona, 13 in MPECs 2013-U01 & 2013-U02 -- 2013 TW135, 2013 TT5, 2013 TT135, 2013 TS135, 2013 TR5, 2013 TO69, 2013 TL135, 2013 TE6, 2013 TB6, 2013 SR, 2013 SL20, 2013 RE21, 162273
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 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.





Notes for Today's Latest Risk Assessments
2013 TV135JPL Sentry17432032-204721.6e-05-1.84-1.851JPL #2 for the day: "Analysis based on 24 observations spanning 7.2572 days (2013-Oct-08.85531 to 2013-Oct-16.11248)." Diameter approximately 0.410 km. from mean, weighted H=19.6.
NEODyS15432032-204722.33e-05-1.68-1.681NEODyS: "Based on 26 optical observations (of which 2 are rejected as outliers) from 2013-10-08.856 to 2013-10-16.113."

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 16 October '13

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

1743Noted that JPL Sentry has updated its 2013 TV135 risk assessment - see above
1543Noted that NEODyS has posted 2013 TV135 as an impact risk - see above
1435Generated Traffic Report
1432Noted that JPL Sentry has posted 2013 TV135 as an impact risk - see above
Grabbed MPEC 2013-U01 - Daily Orbit Update - see above
Grabbed MPEC 2013-U02 - 2013 TW135 - see above
Grabbed MPEC 2013-U03 - 2013 TV135 - see above