Contents  on 19 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 19 October '13

One object reported inside ten LD

One asteroid is reported moving inside ten lunar distances (LD) from our planet today. Within Earth's Hill sphere, 2013 UB (risk-listed radar target) comes its closest to Earth on this passage, reaching 1.61 LD at 0950 UT.

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 1527 UTC with follow-up in today's DOU MPEC for 2013 UB.

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 19 October '13

The MPC's NEO Confirmation Page has 12 listings

When last checked at 2049 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of fifteen 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 19 October '13

Minor Planet Electronic Circulars

As of last check at 2049 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 19 Oct. '13 >>  MPEC 2013-U14 - "06:06 UT" - Daily Orbit Update

Observers  on 19 October '13

Fifteen observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 36 in MPEC 2013-U14 -- 2013 UB, 2013 TY5, 2013 TL69, 2013 SR24, 2013 SL20, 2013 SK19, 2013 QJ10, 2013 PJ26, 2013 OG, 2012 ER14, 2010 XZ67, 2010 JF, 2009 DM1, 2008 JR26, 2007 VH186, 2006 AL3, 2005 RQ6, 2003 ND, 2001 XE1, 2001 TP103, 2000 RV37, 85804, 65733, 52762, 39565, 36236, 252793, 251346, 20460, 162694, 162566, 142781, 142563, 9950, 6063, 3691
470Ceccano Obs. in Italy, 1 in MPEC 2013-U14 -- 2013 TV135
448Desert Moon Obs. in New Mexico, 3 in MPEC 2013-U14 -- 2009 DM1, 2005 XJ8, 358744
B15Inastars Obs. in Germany, 3 in MPEC 2013-U14 -- 2010 XZ67, 2009 YO, 2000 RV37
V37LCOGT Fort Davis in Texas, 1 in MPEC 2013-U14 -- 2013 TV135
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2013-U14 -- 2013 UB
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-U14 -- 3908
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2013-U14 -- 52760
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-U14 -- 153271
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-U14 -- 2013 SC25
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2013-U14 -- 2013 TV135, 2013 RM43, 2013 RH74, 2012 ER14, 2005 RQ6, 22771, 9950
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-U14 -- 2013 UB
G403program code 3 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-U14 -- 52760
G404program code 4 via Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-U14 -- 2013 TV135
926Tenagra II Obs. in Arizona, 18 in MPEC 2013-U14 -- 2013 UC, 2013 UB, 2013 TV5, 2013 TV135, 2013 TU135, 2013 TR5, 2013 TL, 2013 TH5, 2013 TE135, 2013 SS19, 2013 SK19, 2010 LJ14, 2006 WX1, 2006 HU30, 2006 AL3, 2002 TN30, 2001 RY47, 2000 JY8
H068program code 8 via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-U14 -- 2013 TV135
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 19 October '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2049 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 UBJPL Sentry15152093-211242.3e-07-7.79-7.860JPL: "Analysis based on 51 observations spanning 2.9482 days (2013-Oct-16.25495 to 2013-Oct-19.20311)." Diameter approximately 0.016 km. from mean, weighted H=26.7.
NEODyS15152111-211113.14e-08-8.72-8.720NEODyS: "Based on 54 optical observations (of which 4 are rejected as outliers) from 2013-10-16.256 to 2013-10-19.204."
2013 TV135JPL Sentry20492032-204727.2e-05-1.19-1.191JPL: "Analysis based on 86 observations spanning 9.6367 days (2013-Oct-08.85531 to 2013-Oct-18.492004)." Diameter approximately 0.410 km. from mean, weighted H=19.6.
NEODyS16222032-209832.66e-04-0.62-0.621NEODyS: "Based on 88 optical observations (of which 2 are rejected as outliers) from 2013-10-08.856 to 2013-10-18.493."
2013 SC25NEODyS15152017-2110446.42e-09-4.34-5.190NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2013-10-17.424 to 2013-10-18.246."

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 19 October '13

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

2049Noted that JPL Sentry has updated its 2013 TV135 risk assessment - see above
1622Noted that NEODyS has updated its 2013 TV135 risk assessment - see above
1527Generated Traffic Report
1515Noted that NEODyS has posted 2013 SC25 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 UB risk assessment - see above
Noted that NEODyS has updated its 2013 UB risk assessment - see above
Grabbed MPEC 2013-U14 - Daily Orbit Update - see above