Contents  on 22 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 22 October '13

One object reported inside ten LD

Only one object is reported as currently being inside a radius of ten lunar distances (LD) from Earth today. Radar target 2013 UB is outbound from 4.83 to 6.52 LD.

Radar target 2001 AV43 arrives inside ten LD on November 6th and radar target 2013 NJ arrives on November 19th.

This report was generated at 1552 UTC, noting that radar observation of 2013 UB was reported late yesterday.



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 22 October '13

The MPC's NEO Confirmation Page has 24 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 24 objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 30 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 22 October '13

Minor Planet Electronic Circulars

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


MPEC 2013-U22 - "21:58 UT" - 2013 UZ


MPEC 2013-U21 - "21:53 UT" - 2013 UY


MPEC 2013-U20 - "21:47 UT" - 2013 UX


<< DOU on 22 Oct. '13 >>  MPEC 2013-U19 - "06:02 UT" - Daily Orbit Update


MPEC 2013-U18 - "03:52 UT" - Comet P/2013 T2 (Schwartz)

Observers  on 22 October '13

A total of 23 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 20 in MPECs 2013-U18, 2013-U19, 2013-U20, 2013-U21 & 2013-U22 -- 2013 UZ, 2013 UY, 2013 UX, 2013 TX5, 2013 TS4, 2013 TR5, 2013 TM4, 2013 TL, 2013 TG, 2013 TF4, 2013 TE, 2013 TD4, 2013 TC6, 2013 TC4, P/2013 T2, 2013 SO20, 2013 SN20, 2013 SM20, 2013 RR5, 2013 JK22
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-U19 -- 2013 TB80
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-U18 -- P/2013 T2
K51Celado Obs., 4 in MPEC 2013-U19 -- 340666, 252373, 250458, 162273
448Desert Moon Obs. in New Mexico, 4 in MPECs 2013-U18, 2013-U19 & 2013-U21 -- 2013 UY, P/2013 T2, 2001 RY47, 143649
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPEC 2013-U19 -- 2013 SC25, 2010 GY6, 361071
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-U18 -- P/2013 T2
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-U18 -- P/2013 T2
C73Galati Obs. in Romania, 1 in MPEC 2013-U19 -- 2013 TV135
V37LCOGT Fort Davis in Texas, 2 in MPECs 2013-U19 & 2013-U22 -- 2013 UZ, 2013 TV135
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2013-U18, 2013-U20 & 2013-U21 -- 2013 UY, 2013 UX, P/2013 T2
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-U19 -- 3908
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2013-U20 & 2013-U21 -- 2013 UY, 2013 UX
C23Olmen Obs. in Belgium, 1 in MPEC 2013-U19 -- 2013 RM43
F51Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2013-U19 & 2013-U22 -- 2013 UZ, 2013 TS132, 2013 RE6, 2009 SK1, 2003 OB4, 88710, 371660
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2013-U19 -- 2013 TV135, 2013 RM43, 2010 GY6, 2009 WE253, 2008 HO3, 251346, 10115, 3361, 1981
Y00SONEAR Obs. in Brazil, 4 in MPEC 2013-U19 -- 333478, 159699, 143649, 2212
K90Sopot Obs., 2 in MPEC 2013-U19 -- 2013 TV135, 2013 RM43
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2013-U19 -- 2008 WN2, 2007 RU17, 351545, 285990, 257838, 242708, 162038
291Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2013-U19 & 2013-U22 -- 2013 UZ, 2013 TS132, 2013 TK69
673!Jana Pittichova via Table Mtn. Obs. in southern California, 2 in MPECs 2013-U18 & 2013-U21 -- 2013 UY, P/2013 T2
926Tenagra II Obs. in Arizona, 2 in MPECs 2013-U18 & 2013-U21 -- 2013 UY, P/2013 T2
718Wiggins Obs. in Utah, 1 in MPEC 2013-U19 -- 2013 TV135
I896program code 6 via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2013-U18 -- P/2013 T2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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 UBNEODyS1549R E M O V E D-
2013 TV135JPL Sentry17532032-204726.3e-05-1.15-1.151JPL: "Analysis based on 207 observations spanning 12.614 days (2013-Oct-08.85531 to 2013-Oct-21.469641)." Diameter approximately 0.450 km. from mean, weighted H=19.4.
NEODyS15492032-204721.23e-04-0.86-0.861NEODyS: "Based on 209 optical observations (of which 2 are rejected as outliers) from 2013-10-08.856 to 2013-10-21.470."
2012 VZ19JPL Sentry2111R E M O V E DJPL: Risk listing removed at 2020 UTC.
2012 UU158JPL Sentry1952207014.0e-06-6.35-6.350JPL: "Analysis based on 11 observations spanning 13.951 days (2012-Oct-23.505478 to 2012-Nov-06.456322)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
2012 UU68JPL Sentry1952R E M O V E DJPL: Risk listing removed at 1809 UTC.
2012 UE34JPL Sentry19522095-210564.4e-07-5.88-6.350JPL: "Analysis based on 45 observations spanning 85.993 days (2012-Oct-18.39351 to 2013-Jan-12.386296)." Diameter approximately 0.081 km. from mean, weighted H=23.1.
2012 TC4JPL Sentry15492020-2112825.5e-05-5.03-5.940JPL: "Analysis based on 301 observations spanning 7.2808 days (2012-Oct-04.467661 to 2012-Oct-11.74842)." Diameter approximately 0.015 km. from mean, weighted H=26.7.
2012 PK24JPL Sentry15492051-205923.1e-08-6.76-6.930JPL: "Analysis based on 69 observations spanning 33.752 days (2012-Aug-13.41355 to 2012-Sep-16.16533)." Diameter approximately 0.063 km. from mean, weighted H=23.6.
2012 PB20JPL Sentry15492066-211259.2e-07-6.42-6.870JPL: "Analysis based on 46 observations spanning 56.850 days (2012-Aug-14.48151 to 2012-Oct-10.331721)." Diameter approximately 0.035 km. from mean, weighted H=24.9.

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 22 October '13

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

2320Grabbed MPEC 2013-U20 - 2013 UX - see above
Grabbed MPEC 2013-U21 - 2013 UY - see above
Grabbed MPEC 2013-U22 - 2013 UZ - see above
2111Noted that JPL Sentry has removed 2012 VZ19 as an impact risk - see above
1952Noted that JPL Sentry has updated its 2012 UE34 risk assessment - see above
Noted that JPL Sentry has updated its 2012 UU158 risk assessment - see above
Noted that JPL Sentry has removed 2012 UU68 as an impact risk - see above
1753Noted that JPL Sentry has updated its 2013 TV135 risk assessment - see above
1552Generated Traffic Report
1549Noted that JPL Sentry has updated its 2012 PB20 risk assessment - see above
Noted that JPL Sentry has updated its 2012 PK24 risk assessment - see above
Noted that JPL Sentry has updated its 2012 TC4 risk assessment - see above
Noted that NEODyS has updated its 2013 TV135 risk assessment - see above
Noted that NEODyS has removed 2013 UB as an impact risk - see above
Grabbed MPEC 2013-U18 - Comet P/2013 T2 (Schwartz) - see above
Grabbed MPEC 2013-U19 - Daily Orbit Update - see above