Contents  on 9 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 9 October '13

Four objects reported inside ten LD

Four objects are reported traveling inside ten lunar distances (LD) of Earth today, all headed away. 2013 TO4 is outbound from 6.28 to 6.67 LD, risk-listed intruder 2013 RZ53 from 6.80 to 7.13 LD, radar target 2013 SU24 from 7.01 to 7.99 LD, and 2013 SC21 leaves ten LD, moving from 9.80 to 11.21 LD.

Coming our way next, risk-listed 2013 TX68 comes inside the ten-LD reporting "bubble" tomorrow. Radar target 2001 AV43 arrives inside ten LD on November 6th.

This report was updated at 2331 UTC with already departed new discovery 2013 TM69 (MPEC). Today's first traffic report was generated at 1548 UTC with follow-up in today's DOU MPEC for 2013 TX68, 2013 TO4, 2013 SU24 as well as for departed 2013 TH6, 2013 TG6, and 2013 TD plus the recovery of 2013 RE32, expanding its observing arc from 8.92 to 31.89 days. (First follow-up for 2013 TX68, 2013 TH6, and 2013 TG6.)

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 9 October '13

The MPC's NEO Confirmation Page has 16 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had sixteen objects listed. Of these, seven 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 9 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.

MPEC 2013-T81 - "19:27 UT" - 2013 TO69

MPEC 2013-T80 - "19:20 UT" - 2013 TN69

MPEC 2013-T79 - "19:13 UT" - 2013 TM69

<< DOU on 9 Oct. '13 >>  MPEC 2013-T78 - "06:04 UT" - Daily Orbit Update

MPEC 2013-T77 - "02:01 UT" - 2005 BW1

Observers  on 9 October '13

A total of 26 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 22 in MPECs 2013-T77, 2013-T78, 2013-T79, 2013-T80 & 2013-T81 -- 2013 TX5, 2013 TV5, 2013 TS5, 2013 TO69, 2013 TN69, 2013 TM69, 2013 TL, 2013 TH5, 2013 TG6, 2013 TF4, 2013 TE6, 2013 TE, 2013 TC6, 2013 TB6, 2013 SX24, 2013 RX80, 2013 RE32, 2013 RA6, 2013 QV1, 2005 BW1, 2002 WQ4, 2001 CA32
I74Baxter Garden Obs. in England, 1 in MPEC 2013-T77 -- 2005 BW1
C77Bernezzo Obs. in Italy, 2 in MPEC 2013-T78 -- 2013 SW24, 2013 RM43
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-T78 -- 2013 SW24
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-T77 -- 2005 BW1
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2013-T78 -- 2013 SR, 89355, 7753
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPEC 2013-T78 -- 2013 TS5, 2013 TH, 2013 RD32, 2013 QH48, 2013 PV2
448Desert Moon Obs. in New Mexico, 1 in MPEC 2013-T77 -- 2005 BW1
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-T77 -- 2005 BW1
E105Richard Miles in England via Faulkes Telescope South in New South Wales, 2 in MPECs 2013-T80 & 2013-T81 -- 2013 TO69, 2013 TN69
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2013-T77 -- 2005 BW1
246KLENOT in the Czech Republic, 8 in MPECs 2013-T77 & 2013-T78 -- 2013 TE, 2013 TD, 2013 SW24, 2013 SE21, 2013 MX5, 2010 VD1, 2005 BW1, 2001 QC34
046Klet Obs. in the Czech Republic, 4 in MPEC 2013-T78 -- 2013 RH74, 242216, 159399, 12711
V37LCOGT Fort Davis in Texas, 1 in MPEC 2013-T81 -- 2013 TO69
G38La Senda Obs., 1 in MPEC 2013-T78 -- 2013 SW24
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2013-T77, 2013-T78 & 2013-T79 -- 2013 TX68, 2013 TM69, 2005 BW1
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-T79 -- 2013 TM69
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2013-T77, 2013-T78, 2013-T80 & 2013-T81 -- 2013 TO69, 2013 TN69, 2013 TG6, 2013 RK43, 2013 RE74, 2005 BW1, 2001 CK42, 139622
C27Pallerols Obs. in Spain, 1 in MPEC 2013-T78 -- 2013 RH74
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2013-T78 & 2013-T79 -- 2013 TM69, 2008 HB38
5611Janos Kelemen via Piszkesteto Station in Hungary, 2 in MPEC 2013-T78 -- 2013 PU13, 329437
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-T77 -- 2005 BW1
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-T77 -- 2005 BW1
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-T78 -- 2000 HW23
291Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2013-T77, 2013-T78, 2013-T80 & 2013-T81 -- 2013 TW68, 2013 TQ12, 2013 TO69, 2013 TN69, 2013 TH6, 2013 TG, 2013 TF4, 2013 RV9, 2013 RR5, 2013 RJ43, 2013 RH43, 2013 PK67, 2009 XD, 2008 WN2, 2008 VF, 2005 UN157, 2005 BW1, 2003 HG2
926Tenagra II Obs. in Arizona, 15 in MPEC 2013-T78 -- 2013 TX68, 2013 TT5, 2013 TO4, 2013 TN4, 2013 TL, 2013 TJ6, 2013 TG6, 2013 TF4, 2013 TE6, 2013 TE, 2013 TC4, 2013 SX24, 2013 SU24, 2013 SR, 2013 SE21
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 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 TX68NEODyS15262017-209258.89e-09-7.23-7.250NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2013-10-06.261 to 2013-10-09.216."
JPL Sentry1519201713.7e-09-7.37-7.370JPL: "Analysis based on 29 observations spanning 2.9549 days (2013-Oct-06.25997 to 2013-Oct-09.2149)." Diameter approximately 0.030 km. from mean, weighted H=25.2.
2013 TH6NEODyS15262085-210531.84e-08-8.36-8.650NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2013-10-05.249 to 2013-10-09.136."
JPL Sentry1519R E M O V E DJPL: Risk listing removed at 1303 UTC.
2013 SW24NEODyS15262106-210613.16e-09-6.76-6.760NEODyS: "Based on 155 optical observations (of which 0 are rejected as outliers) from 2013-09-27.557 to 2013-10-08.899."
2013 RE74NEODyS1519R 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 9 October '13

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

2331Updated Traffic Report
2305Grabbed MPEC 2013-T80 - 2013 TN69 - see above
Grabbed MPEC 2013-T81 - 2013 TO69 - see above
1918Grabbed MPEC 2013-T79 - 2013 TM69 - see above
1526Noted that NEODyS has updated its 2013 SW24 risk assessment - see above
Noted that NEODyS has updated its 2013 TH6 risk assessment - see above
Noted that NEODyS has updated its 2013 TX68 risk assessment - see above
Grabbed MPEC 2013-T78 - Daily Orbit Update - see above
1519Noted that NEODyS has removed 2013 RE74 as an impact risk - see above
Noted that JPL Sentry has removed 2013 TH6 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 TX68 risk assessment - see above
0404Grabbed MPEC 2013-T77 - 2005 BW1 - see above