Contents  on 12 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 12 October '13

Five objects reported inside ten LD

There are five objects reported to be within ten lunar distances (LD) of Earth today. Newly discovered 2013 TM127 is inbound from 6.03 to 4.01 LD and risk-listed 2013 TX68 from 6.86 to 5.51 LD, while risk-listed intruder 2013 RZ53 is outbound from 7.77 to 8.10 LD and two others exit the ten-LD reporting "bubble": 2013 TO4 moves from 9.05 to 10.68 LD, and newly announced intruder 2013 TL127 passes from 9.14 to 12.27 LD, after flying between the Moon (0.83-LD clearance) and Earth (0.98 LD) during 8-9 October.

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 1806 UTC with new discoveries 2013 TM127 (MPEC) and 2013 TL127 (MPEC), and with follow-up in today's DOU MPEC for 2013 NJ and 2001 AV43 and for departed objects 2013 TH6 (risk listed), 2013 TG6, and 2013 PR43. We have added the approaching 2013 NJ to this reporting today. A radar target that will be difficult to observe with ground-based optical telescopes until after passing Earth next month, it was discovered on July 1st (MPEC) and followed into early August, then picked up once last month by Spacewatch (DOU), which also reported it in today's DOU.

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 12 October '13

The MPC's NEO Confirmation Page has 23 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 23 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 29 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 12 October '13

Minor Planet Electronic Circulars

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

<< DOU on 12 Oct. '13 >>  MPEC 2013-T93 - "06:07 UT" - Daily Orbit Update

MPEC 2013-T92 - "04:51 UT" - Comet P/2013 TW5 (Spacewatch)

MPEC 2013-T91 - "01:28 UT" - 2013 TN127

MPEC 2013-T90 - "01:17 UT" - 2013 TM127

MPEC 2013-T89 - "01:11 UT" - 2013 TL127

Observers  on 12 October '13

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 26 in MPECs 2013-T89, 2013-T90, 2013-T91 & 2013-T93 -- 2013 TS4, 2013 TN69, 2013 TN127, 2013 TM127, 2013 TL69, 2013 TL127, 2013 TH69, 2013 TG6, 2013 TF6, 2013 TE6, 2013 TB80, 2013 TB6, 2013 TA6, 2013 SY19, 2013 SX19, 2013 SK19, 2013 RW73, 2013 RK21, 2013 RH43, 2013 PR43, 2013 ER89, 2010 GY6, 2008 CA5, 2002 MT1, 2002 MS3, 159609
300Bisei Spaceguard Center in Japan, 2 in MPECs 2013-T89 & 2013-T90 -- 2013 TM127, 2013 TL127
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2013-T89, 2013-T90, 2013-T91 & 2013-T93 -- 2013 TN127, 2013 TM127, 2013 TL127, 2013 TB6, 2013 SX24, 2013 SW24, 2013 SE21, 2013 PV6, 2013 MX5, 2010 VD1, 2010 TN54, 2008 TA1, 65733, 355256, 30825, 6063
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 16 in MPEC 2013-T93 -- 2013 TN69, 2013 TG6, 2013 TB80, 2013 RX73, 2013 ON5, 2013 KY1, 2013 CE129, 2008 XP2, 2008 VN, 2008 HB38, 2007 ML13, 2006 KZ112, 2002 VR94, 2000 JF1, 90367, 371336
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2013-T89 -- 2013 TL127
958Dax Obs. in France, 1 in MPEC 2013-T89 -- 2013 TL127
448Desert Moon Obs. in New Mexico, 4 in MPEC 2013-T93 -- 2013 TE6, 2013 SW24, 2013 SO19, 2013 RM43
E105Richard Miles in England via Faulkes Telescope South in New South Wales, 2 in MPECs 2013-T90 & 2013-T91 -- 2013 TN127, 2013 TM127
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPEC 2013-T93 -- 2011 UW158, 2001 AV43
J75La Sagra Obs. in Spain, 1 in MPEC 2013-T89 -- 2013 TL127
I36Los Campitos Obs. in Argentina, 1 in MPEC 2013-T89 -- 2013 TL127
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2013-T93 -- 2013 TH6
C23Olmen Obs. in Belgium, 1 in MPEC 2013-T93 -- 2013 RH74
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-T89 -- 2013 TL127
Y00SONEAR Obs. in Brazil, 23 in MPEC 2013-T93 -- 2013 RH74, 2012 ER14, 2011 WU95, 2010 VD1, 2009 SK1, 2008 UN90, 2008 KZ5, 1999 SK10, 85709, 53435, 371660, 368664, 351278, 350988, 24445, 194126, 189263, 169352, 162581, 159699, 152558, 3753, 1980
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2013-T89 & 2013-T91 -- 2013 TN127, 2013 TL127
033Schwarzschild Obs. in Germany, 1 in MPEC 2013-T92 -- P/2013 TW5
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-T92 -- P/2013 TW5
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2013-T92 & 2013-T93 -- P/2013 TW5, 2013 TR5, 2013 TK69, 2013 TJ69, 2013 TF6, 2013 SW24, 2013 RG21, 2013 NJ, 2012 VE37
I93St. Pardon de Conques Obs. in France, 2 in MPECs 2013-T90 & 2013-T91 -- 2013 TN127, 2013 TM127
926Tenagra II Obs. in Arizona, 2 in MPEC 2013-T93 -- 2012 TS, 2010 VD1
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 3 in MPECs 2013-T89, 2013-T90 & 2013-T92 -- P/2013 TW5, 2013 TM127, 2013 TL127
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 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 TH6NEODyS15442103-210527.81e-09-8.75-8.860NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2013-10-05.249 to 2013-10-12.230."
2013 SW24NEODyS1544R E M O V E D-
JPL Sentry1544R E M O V E DJPL: Risk listing removed at 1405 UTC.

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 12 October '13

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

1806Generated Traffic Report
1544Noted that JPL Sentry has removed 2013 SW24 as an impact risk - see above
Noted that NEODyS has removed 2013 SW24 as an impact risk - see above
Noted that NEODyS has updated its 2013 TH6 risk assessment - see above
Grabbed MPEC 2013-T92 - Comet P/2013 TW5 (Spacewatch) - see above
Grabbed MPEC 2013-T93 - Daily Orbit Update - see above
0139Grabbed MPEC 2013-T89 - 2013 TL127 - see above
Grabbed MPEC 2013-T90 - 2013 TM127 - see above
Grabbed MPEC 2013-T91 - 2013 TN127 - see above