Contents  on 3 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 3 October '13

Three objects reported inside ten LD

Three objects are reported passing inside ten lunar distances (LD) of Earth today. Risk-listed intruder 2013 RZ53 (tiny and possibly artificial) is outbound from 4.88 to 5.20 LD, radar target 2013 SU24 moves from 6.11 to 5.50 LD, and 2013 TD from 8.61 to 9.86 LD.

Next known to be coming in, 2013 SC21 arrives inside ten LD on October 5th.

This report was generated at 1507 UTC with follow-up in today's DOU MPEC for 2013 SU24.

UPDATE:  For a time today the NASA/JPL risk pages and Horizons data service were off line for maintenance but are now back up and running."



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 3 October '13

The MPC's NEO Confirmation Page has 35 listings

When last checked at 2307 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 35 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 51 listings on the NEOCP today.

New MPECs  on 3 October '13

Minor Planet Electronic Circulars

As of last check at 2307 UTC, there have been eleven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-T26 - "20:11 UT" - 2013 TK4


MPEC 2013-T25 - "20:07 UT" - 2013 TJ4


MPEC 2013-T24 - "20:02 UT" - 2013 TH4


MPEC 2013-T23 - "19:57 UT" - 2013 TG4


MPEC 2013-T22 - "19:48 UT" - 2013 TF4


MPEC 2013-T21 - "19:44 UT" - 2013 TE4


MPEC 2013-T20 - "19:39 UT" - 2013 TD4


MPEC 2013-T19 - "19:34 UT" - 2013 TC4


MPEC 2013-T18 - "19:29 UT" - 2013 SL30


MPEC 2013-T17 - "17:57 UT" - 2010 SG15


<< DOU on 3 Oct. '13 >>  MPEC 2013-T16 - "06:04 UT" - Daily Orbit Update

Observers  on 3 October '13

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

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-T18 -- 2013 SL30
H21Astronomical Research Obs. Westfield in Illinois, 6 in MPECs 2013-T16 & 2013-T18 -- 2013 SW24, 2013 SR24, 2013 SN24, 2013 SL30, 2013 SE21, 2013 RG21
U82CS3 Palmer Divide Station in southern California, 1 in MPEC 2013-T16 -- 2013 SU24
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2013-T16 & 2013-T18 -- 2013 SL30, 2012 ER14, 2011 UW158, 2005 RQ6, 351278, 254417, 162694, 162273, 142464, 10115, 1863
448Desert Moon Obs. in New Mexico, 3 in MPEC 2013-T16 -- 2005 SH26, 1998 YB8, 162694
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-T16 -- 2013 RX80
113Drebach Obs. in Germany, 2 in MPECs 2013-T16 & 2013-T18 -- 2013 SU24, 2013 SL30
C43Hoyerswerda Obs. in Germany, 1 in MPEC 2013-T22 -- 2013 TF4
246KLENOT in the Czech Republic, 4 in MPECs 2013-T16, 2013-T17, 2013-T18 & 2013-T19 -- 2013 TJ, 2013 TC4, 2013 SL30, 2010 SG15
K92LCOGT Sutherland B in South Africa, 1 in MPEC 2013-T18 -- 2013 SL30
H01Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2013-T17, 2013-T20, 2013-T22, 2013-T23, 2013-T24 & 2013-T25 -- 2013 TJ4, 2013 TH4, 2013 TG4, 2013 TF4, 2013 TD4, 2010 SG15
G96Mt. Lemmon Survey (MLS) in Arizona, 13 in MPECs 2013-T16, 2013-T17, 2013-T18, 2013-T19, 2013-T21, 2013-T22, 2013-T24, 2013-T25 & 2013-T26 -- 2013 TK4, 2013 TJ4, 2013 TH4, 2013 TF4, 2013 TE4, 2013 TC4, 2013 SS19, 2013 SL30, 2010 SG15, 2008 TA1, 373135, 359592, 30825
G34Oberfrauendorf Obs., 1 in MPEC 2013-T16 -- 2013 SW24
C23Olmen Obs. in Belgium, 1 in MPEC 2013-T16 -- 2012 TS
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPEC 2013-T16 -- 2013 SX24, 2013 SU24, 2013 PV6, 2010 VM1, 2000 GC147, 252793
461SZTE Asteroid Program in Hungary, 1 in MPEC 2013-T16 -- 2013 SU24
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2013-T18 -- 2013 SL30
104San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2013-T17, 2013-T20 & 2013-T21 -- 2013 TE4, 2013 TD4, 2010 SG15
233San Vito Obs. in Italy, 1 in MPEC 2013-T16 -- 3691
033Schwarzschild Obs. in Germany, 15 in MPECs 2013-T16, 2013-T17, 2013-T18, 2013-T21 & 2013-T22 -- 2013 TK, 2013 TH, 2013 TF4, 2013 TF, 2013 TE4, 2013 TE, 2013 TC, 2013 SN24, 2013 SL30, 2013 RX80, 2013 RU73, 2013 RH74, 2013 RE, 2013 PN43, 2010 SG15
G403program code 3 via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2013-T16 -- 2013 SW24
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2013-T16, 2013-T18, 2013-T20 & 2013-T23 -- 2013 TG4, 2013 TD4, 2013 SL30, 2013 PV6
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2013-T17, 2013-T20, 2013-T21 & 2013-T23 -- 2013 TG4, 2013 TE4, 2013 TD4, 2010 SG15
673!Jana Pittichova via Table Mtn. Obs. in southern California, 2 in MPECs 2013-T18 & 2013-T20 -- 2013 TD4, 2013 SL30
926Tenagra II Obs. in Arizona, 1 in MPEC 2013-T18 -- 2013 SL30
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 October '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2307 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 TG4JPL Sentry23072024-2102217.4e-09-6.36-6.660JPL: "Analysis based on 12 observations spanning 1.0034 days (2013-Oct-02.34866 to 2013-Oct-03.35208)." Diameter approximately 0.170 km. from mean, weighted H=21.5.
2013 SW24NEODyS15052106-210612.37e-08-5.91-5.910NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2013-09-27.557 to 2013-10-02.777."
2007 FT3JPL Sentry04062019-21101261.2e-06-3.12-3.740JPL: "Analysis based on 14 observations spanning 1.2324 days (2007-Mar-20.45448 to 2007-Mar-21.68686)." Diameter approximately 0.340 km. from mean, weighted H=20.0.

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 3 October '13

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

2307Noted that JPL Sentry has posted 2013 TG4 as an impact risk - see above
2141Grabbed MPEC 2013-T25 - 2013 TJ4 - see above
Grabbed MPEC 2013-T26 - 2013 TK4 - see above
2007Grabbed MPEC 2013-T19 - 2013 TC4 - see above
Grabbed MPEC 2013-T20 - 2013 TD4 - see above
Grabbed MPEC 2013-T21 - 2013 TE4 - see above
Grabbed MPEC 2013-T22 - 2013 TF4 - see above
Grabbed MPEC 2013-T23 - 2013 TG4 - see above
Grabbed MPEC 2013-T24 - 2013 TH4 - see above
1931Grabbed MPEC 2013-T18 - 2013 SL30 - see above
1805Grabbed MPEC 2013-T17 - 2010 SG15 - see above
1507Generated Traffic Report
1505Noted that NEODyS has reposted 2013 SW24 as an impact risk - see above
Grabbed MPEC 2013-T16 - Daily Orbit Update - see above
0406Noted that JPL Sentry has updated its 2007 FT3 risk assessment - see above