Contents  on 29 October '13

NOTE:  The A/CC news pages will update less frequently than usual during the next few days.

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 29 October '13

Two objects reported inside ten LD

There are two asteroids reported to be inside a radius of ten lunar distances (LD) from our home world today. Intruder 2013 UV3 passes the Earth at 0.74 LD at 2148 UT and, also within Earth's Hill sphere, intruder 2013 UX2 is outbound from 2.96 to 3.80 LD.

Up next, 2013 UE1 arrives inside ten LD on November 4th, radar target 2001 AV43 arrives on November 6th, and radar target 2013 NJ on November 19th.

This report was generated at 1649 UTC with follow-up in today's DOU MPEC for 2013 UV3 (first follow-up), 2013 UE1, 2001 AV43, and departed 2013 UG1.



Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 29 October '13

The MPC's NEO Confirmation Page has 18 listings

When last checked at 2357 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 27 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 29 October '13

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2013-U79 - "17:41 UT" - 2013 UT8


MPEC 2013-U78 - "17:36 UT" - 2013 US8


MPEC 2013-U77 - "17:30 UT" - 2013 UR8


MPEC 2013-U76 - "17:24 UT" - 2013 UQ8


MPEC 2013-U75 - "17:17 UT" - 2013 UP8


<< DOU on 29 Oct. '13 >>  MPEC 2013-U74 - "06:05 UT" - Daily Orbit Update

Observers  on 29 October '13

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2013-U74, 2013-U76, 2013-U77, 2013-U78 & 2013-U79 -- 2013 UY, 2013 UV3, 2013 UT8, 2013 US8, 2013 UR8, 2013 UQ8, 2013 UQ1, 2013 UG1, 2013 UB1, 2013 TV135, 2013 TG4, 2013 SK19, 354101, 4486, 2212
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2013-U74, 2013-U76, 2013-U78 & 2013-U79 -- 2013 UT8, 2013 US8, 2013 UQ8, 2013 UC1, 2013 TW135, 2013 TE6, 2011 QD48, 2009 DM1, 2008 UW5, 2008 HO3, 65996, 351545, 142464, 6063, 1863
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPECs 2013-U74 & 2013-U75 -- 2013 UR3, 2013 UQ4, 2013 UP8, 2013 UG1, 2013 UE1, 2013 TS5, 2013 TN69, 2013 TL69, 2013 TK69, 2013 SS19
448Desert Moon Obs. in New Mexico, 5 in MPEC 2013-U74 -- 2013 UH5, 2013 UG5, 2010 GY6, 2008 HO3, 249595
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-U74 -- 2013 UR5
J95Great Shefford Obs. in England, 3 in MPECs 2013-U74, 2013-U76 & 2013-U78 -- 2013 UV3, 2013 US8, 2013 UQ8
238Grorudalen Obs., 2 in MPEC 2013-U74 -- 162566, 142781
D00ISON-Kislovodsk Obs., 2 in MPEC 2013-U74 -- 351545, 10115
H15ISON-NM Obs. in New Mexico, 2 in MPEC 2013-U74 -- 2013 TV135, 30825
W86LCOGT Cerro Tololo B in Chile, 1 in MPEC 2013-U75 -- 2013 UP8
V37LCOGT Fort Davis in Texas, 2 in MPECs 2013-U74 & 2013-U76 -- 2013 UQ8, 2013 UM5
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2013-U77 -- 2013 UR8
C94MASTER-II Obs. Tunka in Russia, 1 in MPEC 2013-U74 -- 17511
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-U74 -- 2011 PN1
711McDonald Obs. in Texas, 5 in MPECs 2013-U74 & 2013-U76 -- 2013 UQ8, 2013 UG1, 2013 TB6, 2013 SW24, 2013 SL30
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2013-U74 & 2013-U77 -- 2013 UR8, 2013 TS132, 2005 UM5, 2005 JO3, 2001 AV43, 350751, 17182, 1981
A24New Millennium Obs. in Italy, 9 in MPEC 2013-U74 -- 2012 TS, 88710, 53435, 361071, 350988, 168378, 9950, 4450, 2100
C23Olmen Obs. in Belgium, 1 in MPEC 2013-U74 -- 2013 RM43
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2013-U74 -- 2013 TL117, 2008 JR26
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2013-U74 & 2013-U75 -- 2013 UP8, 2013 UC, 2003 ND, 162210
D29Purple Mtn. Obs. Xuyi Station in China, 18 in MPEC 2013-U74 -- 2013 TS4, 2013 TE6, 2013 TE135, 2013 PV6, 2003 WX25, 1999 SK10, 88710, 39565, 370688, 355256, 354182, 350751, 251346, 220909, 20826, 162149, 5143, 1981
071Rhozen Obs. in Bulgaria, 1 in MPEC 2013-U74 -- 2013 TV135
Y00SONEAR Obs. in Brazil, 1 in MPEC 2013-U74 -- 2010 EH43
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2013-U74 -- 2013 TV135, 2013 RU73, 2011 BO24
926Tenagra II Obs. in Arizona, 7 in MPEC 2013-U74 -- 2013 UV3, 2013 UU4, 2013 UQ1, 2013 UF3, 2013 UE3, 2013 UC3, 2013 TV135
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 October '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2357 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 UP8JPL Sentry20192038-208022.8e-10-4.64-4.790JPL: "Analysis based on 14 observations spanning 3.7367 days (2013-Oct-25.43964 to 2013-Oct-29.17637)." Diameter approximately 2.100 km. from mean, weighted H=16.0.
2013 UQ4JPL Sentry1648R E M O V E DJPL: Risk listing removed at 1303 UTC.
2013 TV135NEODyS16482032-204729.53e-05-0.97-0.971NEODyS: "Based on 463 optical observations (of which 7 are rejected as outliers) from 2013-10-08.856 to 2013-10-28.485."

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 29 October '13

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

2019Noted that JPL Sentry has posted 2013 UP8 as an impact risk - see above
1812Grabbed MPEC 2013-U75 - 2013 UP8 - see above
Grabbed MPEC 2013-U76 - 2013 UQ8 - see above
Grabbed MPEC 2013-U77 - 2013 UR8 - see above
Grabbed MPEC 2013-U78 - 2013 US8 - see above
Grabbed MPEC 2013-U79 - 2013 UT8 - see above
1649Generated Traffic Report
1648Noted that NEODyS has updated its 2013 TV135 risk assessment - see above
Noted that JPL Sentry has removed 2013 UQ4 as an impact risk - see above
Grabbed MPEC 2013-U74 - Daily Orbit Update - see above