Contents  on 27 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 27 October '13

Two objects reported inside ten LD

Two objects are reported inside ten lunar distances (LD) of Earth today. Within Earth's Hill sphere, intruder 2013 UX2 is outbound from 1.27 to 2.11 LD. Further away, intruder 2013 UV3 comes into the ten-LD reporting "bubble," traveling from 10.9 to 7.2 LD*.

Next up, 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 updated at 2332 UTC with new discovery 2013 UT4 (MPEC). Today's first traffic report was generated at 1629 UTC with follow-up in today's DOU MPEC for 2013 UE1 and departed objects 2013 UT3, 2013 UG1, and (first follow-up) risk-listed intruder 2013 UR1.



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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 27 October '13

The MPC's NEO Confirmation Page has 31 listings

When last checked at 2332 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 31 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 51 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 27 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-U58 - "19:56 UT" - 2013 UU4


MPEC 2013-U57 - "19:51 UT" - 2013 UT4


MPEC 2013-U56 - "19:45 UT" - 2013 US4


MPEC 2013-U55 - "19:40 UT" - 2013 UR4


MPEC 2013-U54 - "19:35 UT" - 2013 UQ4


MPEC 2013-U53 - "19:29 UT" - 2013 TV144


MPEC 2013-U52 - "12:19 UT" - 2009 WC52


MPEC 2013-U51 - "11:25 UT" - 2000 KA


<< DOU on 27 Oct. '13 >>  MPEC 2013-U50 - "06:04 UT" - Daily Orbit Update

Observers  on 27 October '13

A total of 35 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 22 in MPECs 2013-U50, 2013-U51, 2013-U54, 2013-U55, 2013-U56, 2013-U57 & 2013-U58 -- 2013 UY, 2013 UX, 2013 UU4, 2013 UT4, 2013 UT3, 2013 US4, 2013 UR4, 2013 UQ4, 2013 UG1, 2013 UC, 2013 UB1, 2013 TY5, 2013 TV135, 2013 TS4, 2013 TF4, 2013 TC136, 2013 TB6, 2013 SV24, 2013 SK19, 2013 RW73, 2013 NK, 2000 KA
I47Auger Obs. in Argentina, 1 in MPEC 2013-U54 -- 2013 UQ4
A81Balzaretto Obs. in Italy, 1 in MPEC 2013-U50 -- 65733
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-U50 -- 2013 US3
W11Calumet Astronomy Center in Indiana, 1 in MPEC 2013-U50 -- 137126
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2013-U50, 2013-U51, 2013-U52 & 2013-U54 -- 2013 UQ4, 2013 PV6, 2011 WU95, 2009 WC52, 2000 KA, 1998 YB8, 89355, 85709, 275545, 162913, 162510, 5863, 4486, 2212
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2013-U50 & 2013-U54 -- 2013 UQ4, 2013 UE1, 2013 PU31, 2013 JK22
G58Chabot Obs. in northern California, 1 in MPEC 2013-U55 -- 2013 UR4
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2013-U54 -- 2013 UQ4
448Desert Moon Obs. in New Mexico, 8 in MPECs 2013-U50 & 2013-U54 -- 2013 UR3, 2013 UQ4, 2013 TW135, 2009 DM1, 39565, 349507, 276468, 162679
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPEC 2013-U50 -- 2013 UZ, 2013 TE6, 2013 RM43
I48El Catalejo Obs. in Argentina, 1 in MPEC 2013-U54 -- 2013 UQ4
734Farpoint Obs. in Kansas, 1 in MPEC 2013-U53 -- 2013 TV144
F65(program code "(" (17) via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-U54 -- 2013 UQ4
J95Great Shefford Obs. in England, 1 in MPEC 2013-U58 -- 2013 UU4
168Kourovskaya Obs. in Russia, 1 in MPEC 2013-U50 -- 2013 TV135
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-U57 -- 2013 UT4
V37LCOGT Fort Davis in Texas, 2 in MPECs 2013-U50 & 2013-U53 -- 2013 TV144, 2013 TV135
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-U50 -- 2011 CY46
711McDonald Obs. in Texas, 3 in MPECs 2013-U51, 2013-U52 & 2013-U53 -- 2013 TV144, 2009 WC52, 2000 KA
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2013-U50, 2013-U55, 2013-U56 & 2013-U58 -- 2013 UU4, 2013 US4, 2013 UR4, 2009 HB, 2000 GC147, 8014
I41Palomar Transient Factory (PTF) in southern California, 2 in MPEC 2013-U50 -- 349507, 162694
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2013-U53 & 2013-U57 -- 2013 UT4, 2013 TV144
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2013-U50 -- 2013 UG1
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-U54 -- 2013 UQ4
L04ROASTERR-1 Obs., 1 in MPEC 2013-U50 -- 2013 TV135
C95SATINO-1 in France, 1 in MPEC 2013-U50 -- 2013 UY
589Santa Lucia Stroncone Obs. in Italy, 1 in MPEC 2013-U50 -- 2013 TV135
510Siegen Obs. in Germany, 1 in MPEC 2013-U50 -- 2013 SW24
K90Sopot Obs., 2 in MPEC 2013-U50 -- 2013 TV135, 2013 SK19
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2013-U50 & 2013-U53 -- 2013 TV144, 373135
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2013-U50, 2013-U52, 2013-U54, 2013-U55 & 2013-U57 -- 2013 UU1, 2013 UT4, 2013 UR4, 2013 UR1, 2013 UQ4, 2013 UP1, 2013 TV135, 2013 RE6, 2013 PA7, 2009 WC52, 2000 SJ8
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2013-U51, 2013-U52 & 2013-U58 -- 2013 UU4, 2009 WC52, 2000 KA
926Tenagra II Obs. in Arizona, 17 in MPECs 2013-U50, 2013-U52, 2013-U55, 2013-U56 & 2013-U58 -- 2013 UZ, 2013 UU4, 2013 UT3, 2013 US4, 2013 US3, 2013 US1, 2013 UR4, 2013 UR3, 2013 UP1, 2013 UK, 2013 UG1, 2013 UE1, 2013 UD1, 2013 UC1, 2013 UB1, 2013 TV135, 2009 WC52
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-U54 -- 2013 UQ4
Q622program code 2 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-U54 -- 2013 UQ4
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 October '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2359 and JPL at 2332 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 UQ4JPL Sentry23322052-2097121.9e-09-1.95-2.670JPL: "Analysis based on 42 observations spanning 3.0503 days (2013-Oct-23.3676 to 2013-Oct-26.41793)." Diameter approximately 9.141 km. from mean, weighted H=12.8.
2013 UR1JPL Sentry16062050-206742.8e-06-6.45-6.530JPL: "Analysis based on 23 observations spanning 3.0116 days (2013-Oct-23.38002 to 2013-Oct-26.39159)." Diameter approximately 0.010 km. from mean, weighted H=27.7.
NEODyS16062050-206742.66e-06-6.48-6.550NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2013-10-23.381 to 2013-10-26.392."
2013 TV135NEODyS16062032-211037.84e-05-1.06-1.061NEODyS: "Based on 410 optical observations (of which 7 are rejected as outliers) from 2013-10-08.856 to 2013-10-27.187."

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 27 October '13

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

2332Noted that JPL Sentry has posted 2013 UQ4 as an impact risk - see above
Updated Traffic Report
2139Grabbed MPEC 2013-U53 - 2013 TV144 - see above
Grabbed MPEC 2013-U54 - 2013 UQ4 - see above
Grabbed MPEC 2013-U55 - 2013 UR4 - see above
Grabbed MPEC 2013-U56 - 2013 US4 - see above
Grabbed MPEC 2013-U57 - 2013 UT4 - see above
Grabbed MPEC 2013-U58 - 2013 UU4 - see above
1606Noted that NEODyS has updated its 2013 TV135 risk assessment - see above
Noted that JPL Sentry has updated its 2013 UR1 risk assessment - see above
Noted that NEODyS has updated its 2013 UR1 risk assessment - see above
Grabbed MPEC 2013-U50 - Daily Orbit Update - see above
Grabbed MPEC 2013-U51 - 2000 KA - see above
Grabbed MPEC 2013-U52 - 2009 WC52 - see above