Contents  on 2 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 2 October '13

Four objects reported inside ten LD

There are four objects reported moving within ten lunar distances (LD) of Earth today. Risk-listed intruder 2013 RZ53 is outbound from 4.56 to 4.88 LD and newly announced 2013 TD from 7.55 to 8.61 LD, while radar target 2013 SU24 is inbound from 6.95 to 6.12 LD, and 2013 SK20 exits ten LD, passing from 7.91 to 10.36 LD.

Coming to the neighborhood next, 2013 SC21 arrives inside ten LD on October 5th.

This report was updated at 2330 UTC with new discovery 2013 TD (MPEC). Today's first traffice report was generated at 1453 UTC with follow-up in today's DOU MPEC for 2013 SU24 and 2013 SC21.



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.

Radar Astrometry  on 2 October '13

Radar observation of two objects

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


Data update noted at 2249 UTC when the database was dated 2 Oct.


Data update noted at 2359 UTC when the database was dated 2 Oct.

NEOCP Activity  on 2 October '13

The MPC's NEO Confirmation Page has 29 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 29 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 48 listings on the NEOCP today.

New MPECs  on 2 October '13

Minor Planet Electronic Circulars

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


MPEC 2013-T15 - "20:36 UT" - 2013 TL


MPEC 2013-T14 - "20:31 UT" - 2013 TK


MPEC 2013-T13 - "20:22 UT" - 2013 TJ


MPEC 2013-T12 - "20:17 UT" - 2013 TH


MPEC 2013-T11 - "20:12 UT" - 2013 TG


MPEC 2013-T10 - "20:07 UT" - 2013 TF


MPEC 2013-T09 - "20:02 UT" - 2013 TE


MPEC 2013-T08 - "19:57 UT" - 2013 TD


MPEC 2013-T07 - "19:52 UT" - 2013 TC


MPEC 2013-T06 - "19:47 UT" - 2013 SG25


MPEC 2013-T05 - "19:42 UT" - 2013 SF25


<< DOU on 2 Oct. '13 >>  MPEC 2013-T04 - "06:03 UT" - Daily Orbit Update

Observers  on 2 October '13

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
H17Angel Peaks Obs. in Colorado, 1 in MPEC 2013-T04 -- 252373
251Arecibo in Puerto Rico, 2 in radar -- 2013 HG20, 329437
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPECs 2013-T04, 2013-T07, 2013-T08, 2013-T09, 2013-T10, 2013-T11, 2013-T12 & 2013-T14 -- 2013 TK, 2013 TH, 2013 TG, 2013 TF, 2013 TE, 2013 TD, 2013 TC, 2013 SX19, 2013 SW24, 2013 SV24, 2013 SR24, 2013 SO19, 2013 SN24, 2013 SN20, 2013 SM20, 2013 SC21, 2013 RS5, 2008 DV, 2002 VP69
300Bisei Spaceguard Center in Japan, 2 in MPECs 2013-T04 & 2013-T09 -- 2013 TE, 2013 SV24
703Catalina Sky Survey (CSS) in Arizona, 21 in MPECs 2013-T04, 2013-T05, 2013-T08, 2013-T09, 2013-T10 & 2013-T13 -- 2013 TJ, 2013 TF, 2013 TE, 2013 TD, 2013 SR, 2013 SO19, 2013 SF25, 2013 MX5, 2013 HG20, 2012 TS, 2010 TN54, 2003 OB4, 85709, 65733, 326946, 242216, 162149, 140288, 5143, 4450, 3691
448Desert Moon Obs. in New Mexico, 6 in MPECs 2013-T04 & 2013-T09 -- 2013 TE, 2013 RH74, 2013 RE21, 2013 QJ10, 2008 TA1, 285263
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPECs 2013-T04 & 2013-T09 -- 2013 TE, 2013 SW24
113Drebach Obs. in Germany, 3 in MPECs 2013-T08, 2013-T09 & 2013-T15 -- 2013 TL, 2013 TE, 2013 TD
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 329437
C43Hoyerswerda Obs. in Germany, 2 in MPECs 2013-T08 & 2013-T09 -- 2013 TE, 2013 TD
B15Inastars Obs. in Germany, 1 in MPEC 2013-T08 -- 2013 TD
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2013-T04, 2013-T06, 2013-T07, 2013-T11, 2013-T12, 2013-T13 & 2013-T14 -- 2013 TK, 2013 TJ, 2013 TH, 2013 TG, 2013 TC, 2013 SG25, 2013 HG20, 2009 BE77, 332408, 154302, 10150
G34Oberfrauendorf Obs., 1 in MPEC 2013-T04 -- 2012 TS
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-T04 -- 1580
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-T10 -- 2013 TF
461SZTE Asteroid Program in Hungary, 3 in MPECs 2013-T04, 2013-T08 & 2013-T09 -- 2013 TE, 2013 TD, 2013 SW24
854Sabino Canyon Obs. in Arizona, 5 in MPECs 2013-T08, 2013-T09, 2013-T10, 2013-T13 & 2013-T15 -- 2013 TL, 2013 TJ, 2013 TF, 2013 TE, 2013 TD
H36Sandlot Obs. in Kansas, 4 in MPECs 2013-T09, 2013-T10, 2013-T12 & 2013-T14 -- 2013 TK, 2013 TH, 2013 TF, 2013 TE
510Siegen Obs. in Germany, 2 in MPECs 2013-T04 & 2013-T09 -- 2013 TE, 2013 SW24
G403program code 3 via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPEC 2013-T04 -- 2013 SW24, 2013 SU24
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2013-T04 & 2013-T15 -- 2013 TL, 2010 VM1, 351545, 257838
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-T15 -- 2013 TL
C36Starry Wanderer Obs. in Belarus, 2 in MPEC 2013-T04 -- 2013 SW24, 2013 RH74
673!Jana Pittichova via Table Mtn. Obs. in southern California, 2 in MPECs 2013-T09 & 2013-T15 -- 2013 TL, 2013 TE
718Wiggins Obs. in Utah, 2 in MPEC 2013-T04 -- 2013 RX80, 2013 RH74
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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 SW24NEODyS1447R E M O V E D-
JPL Sentry1447R E M O V E DJPL: Risk listing removed at 1202 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 2 October '13

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

2359Noted Radar Astrometry database update - see above
2330Updated Traffic Report
2249Grabbed MPEC 2013-T05 - 2013 SF25 - see above
Grabbed MPEC 2013-T06 - 2013 SG25 - see above
Grabbed MPEC 2013-T07 - 2013 TC - see above
Grabbed MPEC 2013-T08 - 2013 TD - see above
Grabbed MPEC 2013-T09 - 2013 TE - see above
Grabbed MPEC 2013-T10 - 2013 TF - see above
Grabbed MPEC 2013-T11 - 2013 TG - see above
Grabbed MPEC 2013-T12 - 2013 TH - see above
Grabbed MPEC 2013-T13 - 2013 TJ - see above
Grabbed MPEC 2013-T14 - 2013 TK - see above
Grabbed MPEC 2013-T15 - 2013 TL - see above
Noted Radar Astrometry database update - see above
1447Noted 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
Grabbed MPEC 2013-T04 - Daily Orbit Update - see above