Contents  on 7 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 7 October '13

Seven objects reported inside ten LD

Seven visitors are reported flying around within ten lunar distances (LD) of our home world today. On the outbound list are radar target 2013 SU24, moving from 5.54 to 6.18 LD, risk-listed intruder 2013 RZ53 from 6.16 to 6.48 LD, 2013 TQ4 from 8.03 to 9.19 LD, and newly discovered 2013 TG6 from 8.44 to 9.30 LD. Newly announced intruder 2013 TR12 departs from inside ten LD, passing from 8.40 to 11.63 LD, after passing the Earth at 0.56 LD on October 4th and discovery 25 hours later. 2013 TO4 is inbound from 7.50 to 6.58 LD and 2013 SC21 comes its closest to Earth on this passage, reaching 8.80 LD at 0842 UT.

Newly announced, risk-listed 2013 TX68 arrives inside ten LD on October 10th and radar target 2001 AV43 arrives on November 6th.

This report was updated at 1945 UTC with new discoveries 2013 TX68 (MPEC) and departed 2013 TY68 (MPEC). Today's first traffic report was generated at 1623 UTC with new discoveries 2013 TR12 (MPEC), 2013 TG6 (MPEC), and already departed risk-listed 2013 TH6 (MPEC), and with first follow-up for 2013 TO4 in today's DOU MPEC along with astrometry for 2013 SU24, 2013 SC21, and 2001 AV43, plus observation of departed 2013 RF74 from September and of distant 2006 VV2.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. "Distant" is used to describe objects that have come within ten LD since this reporting began (2007) but are not so close during this passage or apparition. 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 7 October '13

The MPC's NEO Confirmation Page has 18 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eighteen objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of 39 listings on the NEOCP today.

New MPECs  on 7 October '13

Minor Planet Electronic Circulars

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


MPEC 2013-T67 - "21:10 UT" - 2010 VD1 = 2013 TZ68


MPEC 2013-T66 - "17:41 UT" - 2013 TZ68


MPEC 2013-T65 - "17:35 UT" - 2013 TY68


MPEC 2013-T64 - "17:28 UT" - 2013 TX68


MPEC 2013-T63 - "17:21 UT" - 2013 TW68


MPEC 2013-T62 - "10:58 UT" - 2013 TR12


MPEC 2013-T61 - "10:51 UT" - 2013 TQ12


<< DOU on 7 Oct. '13 >>  MPEC 2013-T60 - "06:03 UT" - Daily Orbit Update


MPEC 2013-T59 - "01:33 UT" - 2013 TJ6


MPEC 2013-T58 - "01:28 UT" - 2013 TH6


MPEC 2013-T57 - "01:24 UT" - 2013 TG6


MPEC 2013-T56 - "01:18 UT" - 2013 TF6


MPEC 2013-T55 - "01:13 UT" - 2013 TE6

Observers  on 7 October '13

A total of 39 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-T66 -- 2013 TZ68
300Bisei Spaceguard Center in Japan, 3 in MPECs 2013-T55, 2013-T59 & 2013-T66 -- 2013 TZ68, 2013 TJ6, 2013 TE6
Q68Blue Mountains Obs. in New South Wales, 1 in MPEC 2013-T60 -- 2010 TN54
703Catalina Sky Survey (CSS) in Arizona, 22 in MPECs 2013-T57, 2013-T59, 2013-T60, 2013-T64 & 2013-T66 -- 2013 TZ68, 2013 TX68, 2013 TJ6, 2013 TG6, 2013 SV24, 2013 SS19, 2013 RM43, 2009 SK1, 2008 HB38, 2005 SH26, 39565, 370688, 275545, 269690, 257838, 250620, 243147, 223456, 168378, 162913, 11398, 6063
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 23 in MPECs 2013-T57, 2013-T60 & 2013-T64 -- 2013 TX68, 2013 TM4, 2013 TH, 2013 TG6, 2013 TF, 2013 TC4, 2013 SV24, 2013 SU19, 2013 ST19, 2013 SS19, 2013 SO24, 2013 SL30, 2013 SL19, 2013 RM43, 2013 RB74, 2013 QG17, 2013 PU13, 2013 PH3, 2013 PB39, 2013 OO5, 2013 NP8, 2013 LF7, 2013 KR1
G58Chabot Obs. in northern California, 3 in MPECs 2013-T60 & 2013-T64 -- 2013 TX68, 2013 RZ73, 2013 RJ74
958Dax Obs. in France, 1 in MPEC 2013-T66 -- 2013 TZ68
448Desert Moon Obs. in New Mexico, 8 in MPECs 2013-T55, 2013-T57, 2013-T60, 2013-T64 & 2013-T66 -- 2013 TZ68, 2013 TX68, 2013 TG6, 2013 TE6, 2008 UW5, 39565, 251346, 137126
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPEC 2013-T60 -- 2013 SW24, 2013 RH74, 2012 TS
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-T55 -- 2013 TE6
J95Great Shefford Obs. in England, 5 in MPECs 2013-T58, 2013-T59, 2013-T60, 2013-T62 & 2013-T64 -- 2013 TX68, 2013 TR12, 2013 TJ6, 2013 TH6, 2008 SZ150
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-T60 -- 2009 SK1
246KLENOT in the Czech Republic, 1 in MPEC 2013-T60 -- 252793
V37LCOGT Fort Davis in Texas, 2 in MPECs 2013-T56 & 2013-T63 -- 2013 TW68, 2013 TF6
I36Los Campitos Obs. in Argentina, 1 in MPEC 2013-T57 -- 2013 TG6
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2013-T55 -- 2013 TE6
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-T60 -- 2001 AV43
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-T60 -- 2013 SE21
474Mt. John Obs. in New Zealand, 7 in MPECs 2013-T57 & 2013-T60 -- 2013 TN4, 2013 TG6, 2013 ST19, 2013 SN24, 2013 SC21, 2013 MR6, 2013 ES89
G96Mt. Lemmon Survey (MLS) in Arizona, 17 in MPECs 2013-T55, 2013-T56, 2013-T58, 2013-T60, 2013-T62 & 2013-T65 -- 2013 TY68, 2013 TR12, 2013 TH6, 2013 TG, 2013 TF6, 2013 TE6, 2013 SY19, 2013 SV19, 2013 RJ36, 2013 PO43, 2013 HG20, 2006 VV2, 1999 SK10, 370702, 369983, 249816, 162781
J93Mt. Tuffley Obs. in England, 2 in MPEC 2013-T60 -- 89830, 1627
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-T60 -- 373135
I41Palomar Transient Factory (PTF) in southern California, 6 in MPECs 2013-T60 & 2013-T66 -- 2013 TZ68, 2013 MX5, 2013 HG20, 2010 TN54, 351545, 162566
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2013-T60, 2013-T61 & 2013-T63 -- 2013 TW68, 2013 TQ12, 2010 UX95, 2008 WN2, 2008 SZ150, 1999 SK10, 52768, 351545, 264308, 159399, 154302, 143678, 137126
Y00SONEAR Obs. in Brazil, 18 in MPEC 2013-T60 -- 2012 TS, 2011 QD48, 2010 UX95, 2010 TN54, 2008 KZ5, 39565, 368664, 358744, 326946, 275677, 250620, 159699, 143649, 137802, 137126, 11405, 3691, 2212
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2013-T55, 2013-T57, 2013-T59 & 2013-T62 -- 2013 TR12, 2013 TJ6, 2013 TG6, 2013 TE6
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-T59 & 2013-T66 -- 2013 TZ68, 2013 TJ6
589Santa Lucia Stroncone Obs. in Italy, 1 in MPEC 2013-T60 -- 2013 SU24
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-T60 -- 2013 RF74
033Schwarzschild Obs. in Germany, 1 in MPEC 2013-T60 -- 2013 TV5
K90Sopot Obs., 5 in MPEC 2013-T60 -- 2013 TE, 2013 SW24, 2013 SR24, 2013 SO19, 2013 RH74
J84South Obs. in England, 2 in MPEC 2013-T60 -- 2013 TO4, 2013 SU24
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2013-T60 -- 2013 TD4, 2013 RH74
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2013-T60, 2013-T61, 2013-T62, 2013-T63, 2013-T65 & 2013-T66 -- 2013 TZ68, 2013 TY68, 2013 TW68, 2013 TR12, 2013 TQ12, 2013 TG4, 2013 RV9, 2013 RF36, 2013 PY6, 2013 PA7, 2006 XD2
I93St. Pardon de Conques Obs. in France, 4 in MPECs 2013-T55, 2013-T57, 2013-T59 & 2013-T66 -- 2013 TZ68, 2013 TJ6, 2013 TG6, 2013 TE6
C36Starry Wanderer Obs. in Belarus, 1 in MPEC 2013-T60 -- 2013 RH74
926Tenagra II Obs. in Arizona, 5 in MPECs 2013-T55, 2013-T56, 2013-T57, 2013-T58 & 2013-T62 -- 2013 TR12, 2013 TH6, 2013 TG6, 2013 TF6, 2013 TE6
I76Tesla Obs. in Spain, 1 in MPEC 2013-T60 -- 2013 RH74
718Wiggins Obs. in Utah, 4 in MPEC 2013-T60 -- 2013 SW24, 2013 SU24, 2013 RX80, 2013 RH74
H068program code 8 via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-T60 -- 285263
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 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 TX68JPL Sentry19162016-203345.3e-08-6.03-6.050JPL: "Analysis based on 22 observations spanning 1.0690 days (2013-Oct-06.25997 to 2013-Oct-07.32892)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
2013 TH6NEODyS14452085-211223.71e-09-9.10-9.170NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2013-10-05.249 to 2013-10-06.286."
JPL Sentry0349205416.9e-10-9.47-9.470JPL: "Analysis based on 15 observations spanning 1.0375 days (2013-Oct-05.24784 to 2013-Oct-06.2853)." Diameter approximately 0.023 km. from mean, weighted H=25.9.

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 7 October '13

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

2130Grabbed MPEC 2013-T67 - 2010 VD1 = 2013 TZ68 - see above
1945Updated Traffic Report
1916Noted that JPL Sentry has posted 2013 TX68 as an impact risk - see above
1839Grabbed MPEC 2013-T63 - 2013 TW68 - see above
Grabbed MPEC 2013-T64 - 2013 TX68 - see above
Grabbed MPEC 2013-T65 - 2013 TY68 - see above
Grabbed MPEC 2013-T66 - 2013 TZ68 - see above
1445Noted that NEODyS has posted 2013 TH6 as an impact risk - see above
Grabbed MPEC 2013-T60 - Daily Orbit Update - see above
Grabbed MPEC 2013-T61 - 2013 TQ12 - see above
Grabbed MPEC 2013-T62 - 2013 TR12 - see above
0349Noted that JPL Sentry has posted 2013 TH6 as an impact risk - see above
0301Grabbed MPEC 2013-T55 - 2013 TE6 - see above
Grabbed MPEC 2013-T56 - 2013 TF6 - see above
Grabbed MPEC 2013-T57 - 2013 TG6 - see above
Grabbed MPEC 2013-T58 - 2013 TH6 - see above
Grabbed MPEC 2013-T59 - 2013 TJ6 - see above