Contents  on 23 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 23 October '13

One object reported inside ten LD

One asteroid is reported to be within ten lunar distances (LD) of our planet today. Radar target 2013 UB is outbound from 6.52 to 8.24 LD.

Newly announced 2013 UE1 is preliminarily calculated with some uncertainty to arrive inside ten LD on November 5th, while radar target 2001 AV43 comes inside on November 6th and radar target 2013 NJ on November 19th.

This report was updated at 2309 UTC with new discoveries 2013 UE1 (MPEC) and already departed risk-listed 2013 UG1 (MPEC). Today's first traffic report was generated at 1510 UTC with follow-up in today's DOU MPEC for 2001 AV43.



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 23 October '13

The MPC's NEO Confirmation Page has 50 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, 35 were "one nighters." So far The Tracking News has counted a total of 62 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 23 October '13

Minor Planet Electronic Circulars

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


MPEC 2013-U31 - "20:09 UT" - 2013 UG1


MPEC 2013-U30 - "20:04 UT" - 2013 UE1


MPEC 2013-U29 - "19:58 UT" - 2013 UD1


MPEC 2013-U28 - "19:54 UT" - 2013 UC1


MPEC 2013-U27 - "19:48 UT" - 2013 UB1


MPEC 2013-U26 - "17:04 UT" - 2008 HS3


MPEC 2013-U25 - "16:58 UT" - 2008 DE


MPEC 2013-U24 - "16:51 UT" - 2013 GR38


<< DOU on 23 Oct. '13 >>  MPEC 2013-U23 - "06:03 UT" - Daily Orbit Update

Observers  on 23 October '13

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-U31 -- 2013 UG1
H21Astronomical Research Obs. Westfield in Illinois, 32 in MPECs 2013-U23 & 2013-U27 -- 2013 UB1, 2013 TW135, 2013 TS135, 2013 TL69, 2013 TE, 2013 SV24, 2013 SK19, 2013 SC25, 2013 RM43, 2013 PV6, 2013 MX5, 2010 EH43, 2006 HU30, 88710, 85818, 65733, 53435, 52760, 39565, 350751, 349507, 254419, 24445, 22771, 142781, 141052, 6611, 6063, 5863, 5143, 4450, 1980
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2013-U23 & 2013-U29 -- 2013 UD1, 2013 TB6, 2010 TN54, 2001 QC34, 355256, 351545, 276786, 243147, 220909, 5143, 4450
470Ceccano Obs. in Italy, 1 in MPEC 2013-U31 -- 2013 UG1
970Chelmsford Obs. in England, 1 in MPEC 2013-U31 -- 2013 UG1
448Desert Moon Obs. in New Mexico, 3 in MPECs 2013-U23 & 2013-U31 -- 2013 UG1, 2001 AV43, 197588
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 6 in MPECs 2013-U23, 2013-U29 & 2013-U31 -- 2013 UG1, 2013 UD1, 2013 TE6, 2001 AV43, 162566, 142781
G32Elena Remote Obs., 1 in MPEC 2013-U31 -- 2013 UG1
J95Great Shefford Obs. in England, 2 in MPECs 2013-U29 & 2013-U31 -- 2013 UG1, 2013 UD1
C43Hoyerswerda Obs. in Germany, 2 in MPECs 2013-U29 & 2013-U31 -- 2013 UG1, 2013 UD1
H15ISON-NM Obs. in New Mexico, 2 in MPECs 2013-U23 & 2013-U31 -- 2013 UG1, 2013 TV135
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 9 in MPECs 2013-U23, 2013-U24, 2013-U25 & 2013-U26 -- 2013 QN10, 2013 QC11, 2013 GR38, 2011 WO41, 2008 HS3, 2008 DE, 2007 VW137, 2006 UK, 2002 PD43
V37LCOGT Fort Davis in Texas, 3 in MPECs 2013-U23, 2013-U27 & 2013-U29 -- 2013 UD1, 2013 UB1, 2013 SC25
C94MASTER-II Obs. Tunka in Russia, 1 in MPEC 2013-U31 -- 2013 UG1
G96Mt. Lemmon Survey (MLS) in Arizona, 12 in MPECs 2013-U23 & 2013-U28 -- 2013 UC1, 2013 RL21, 2013 HG20, 2008 TA1, 2005 SH26, 1999 SK10, 373135, 34613, 292220, 20826, 168378, 138947
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-U23 -- 4450
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2013-U23, 2013-U27 & 2013-U30 -- 2013 UE1, 2013 UB1, 2008 HB38, 20429, 3361
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2013-U29 & 2013-U31 -- 2013 UG1, 2013 UD1
K90Sopot Obs., 1 in MPEC 2013-U23 -- 2013 NX23
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2013-U23 -- 2009 FU4, 2008 TD4, 2008 TA1, 2000 HW23
291Spacewatch 1.8m telescope in Arizona, 20 in MPECs 2013-U23, 2013-U27, 2013-U28, 2013-U29, 2013-U30 & 2013-U31 -- 2013 UK, 2013 UG1, 2013 UE1, 2013 UD1, 2013 UC1, 2013 UB1, 2013 TX5, 2013 TS132, 2013 TK69, 2013 TJ135, 2013 TD4, 2013 TC4, 2013 SX24, 2013 SL19, 2013 SA20, 2013 MY5, 2013 GY7, 2012 MO3, 2010 HR80, 2003 UL3
673!Jana Pittichova via Table Mtn. Obs. in southern California, 1 in MPEC 2013-U27 -- 2013 UB1
926Tenagra II Obs. in Arizona, 6 in MPEC 2013-U23 -- 2013 TV135, 2013 TL, 2013 TH5, 2013 SF, 2013 NX23, 2013 LH16
718Wiggins Obs. in Utah, 1 in MPEC 2013-U23 -- 2013 TV135
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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 UG1JPL Sentry23212068-207578.1e-06-3.74-3.990JPL: "Analysis based on 54 observations spanning 1.2804 days (2013-Oct-22.51742 to 2013-Oct-23.79781)." Diameter approximately 0.120 km. from mean, weighted H=22.2.
2013 TV135JPL Sentry16402032-204721.1e-04-0.92-0.931JPL: "Analysis based on 220 observations spanning 13.634 days (2013-Oct-08.85531 to 2013-Oct-22.48927)." Diameter approximately 0.450 km. from mean, weighted H=19.4.
NEODyS15082032-204721.99e-04-0.65-0.651NEODyS: "Based on 222 optical observations (of which 2 are rejected as outliers) from 2013-10-08.856 to 2013-10-22.490."
29075 1950 DAJPL Sentry1640R 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 23 October '13

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

2321Noted that JPL Sentry has posted 2013 UG1 as an impact risk - see above
2309Updated Traffic Report
2145Grabbed MPEC 2013-U27 - 2013 UB1 - see above
Grabbed MPEC 2013-U28 - 2013 UC1 - see above
Grabbed MPEC 2013-U29 - 2013 UD1 - see above
Grabbed MPEC 2013-U30 - 2013 UE1 - see above
Grabbed MPEC 2013-U31 - 2013 UG1 - see above
1844Grabbed MPEC 2013-U24 - 2013 GR38 - see above
Grabbed MPEC 2013-U25 - 2008 DE - see above
Grabbed MPEC 2013-U26 - 2008 HS3 - see above
1640Noted that JPL Sentry has removed 29075 1950 DA as an impact risk - see above
Noted that JPL Sentry has updated its 2013 TV135 risk assessment - see above
1508Noted that NEODyS has updated its 2013 TV135 risk assessment - see above
Grabbed MPEC 2013-U23 - Daily Orbit Update - see above