Contents  on 14 February '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 14 February '13

Five objects reported inside ten LD

There are five objects known today to be within a radius of ten lunar distances (LD) of the planet we call home. Inside Earth's Hill sphere, intruder 2012 DA14 (risk-listed radar target) is inbound from 2.58 to 1.18 LD, coming into the Earth-Moon system early tomorrow. Further out, radar target 2013 BV15 is outbound from 3.92 to 4.85 LD and radar target 2013 BS45 from 5.07 to 5.28 LD, while two objects come inside ten LD. 2013 CE82 travels from 11.87 to 9.21 LD and 2013 CZ87 from 10.76 to 9.62 LD.

Next known to enter the ten-LD "bubble" is returning risk-listed 2007 EO88, which arrives inside ten LD on March 15th.

This report was generated at 1647 UTC with follow-up in today's DOU MPEC for 2013 CZ87, 2013 CE82, 2013 CY, 2012 DA14, and departed risk-listed 2013 CL22.



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 14 February '13

The MPC's NEO Confirmation Page has 43 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 43 objects listed. Of these, 28 were "one nighters." So far The Tracking News has counted a total of 79 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 14 February '13

Minor Planet Electronic Circulars

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


MPEC 2013-C71 - "16:22 UT" - 2010 RK64


MPEC 2013-C70 - "15:33 UT" - 2013 CJ89


MPEC 2013-C69 - "15:28 UT" - 2013 CL89


MPEC 2013-C68 - "15:26 UT" - 2013 CK89


MPEC 2013-C67 - "15:07 UT" - 2011 WU95


<< DOU on 14 Feb. '13 >>  MPEC 2013-C66 - "06:04 UT" - Daily Orbit Update

Observers  on 14 February '13

A total of 27 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPECs 2013-C66, 2013-C68, 2013-C69, 2013-C70 & 2013-C71 -- 2013 CL89, 2013 CL22, 2013 CK89, 2013 CJ89, 2013 BY45, 2013 AQ60, 2012 XY6, 2010 RK64, 307161
I56Beckman Obs. in Spain, 6 in MPEC 2013-C66 -- 2013 CR35, 99942, 214869, 152889, 11405, 4179
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-C68 -- 2013 CK89
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2013-C66 & 2013-C69 -- 2013 CZ87, 2013 CL89
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2013-C68 & 2013-C69 -- 2013 CL89, 2013 CK89
G58Chabot Obs. in northern California, 2 in MPEC 2013-C66 -- 2013 CS83, 2013 CE82
448Desert Moon Obs. in New Mexico, 6 in MPEC 2013-C66 -- 2013 CW35, 2013 BQ45, 2011 DL19, 2009 BL2, 353190, 220909
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 7 in MPEC 2013-C66 -- 2013 CW83, 2013 CV83, 2013 CT36, 2013 CR35, 2013 CN35, 2012 CD29, 2008 DG17
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 3 in MPECs 2013-C67, 2013-C68 & 2013-C70 -- 2013 CK89, 2013 CJ89, 2011 WU95
F658David Tholen's team in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-C66 -- 2012 LK9
E102Ernesto Guido in Italy via Faulkes Telescope South in New South Wales, 1 in MPEC 2013-C69 -- 2013 CL89
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-C70 -- 2013 CJ89
W86LCOGT Cerro Tololo B in Chile, 2 in MPECs 2013-C68 & 2013-C69 -- 2013 CL89, 2013 CK89
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2013-C66 & 2013-C70 -- 2013 CJ89, 2013 BP73
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-C66 -- 2013 BP45
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-C70 -- 2013 CJ89
711McDonald Obs. in Texas, 2 in MPEC 2013-C66 -- 2013 CU83, 2013 CT82
474Mt. John Obs. in New Zealand, 2 in MPECs 2013-C68 & 2013-C69 -- 2013 CL89, 2013 CK89
E07Murrumbateman Obs. in New South Wales, 1 in MPEC 2013-C66 -- 2012 DA14
A24New Millennium Obs. in Italy, 18 in MPEC 2013-C66 -- 2013 AU76, 2012 QF49, 2012 PQ28, 349068, 343098, 24761, 22753, 177651, 177049, 154347, 153219, 137925, 5646, 4486, 4179, 3908, 2212, 2062
0891program code 1 via Nikolaev Obs. in the Ukraine, 1 in MPEC 2013-C66 -- 99942
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2013-C66 & 2013-C70 -- 2013 CQ35, 2013 CJ89, 2013 AY52, 2011 BK24, 39796, 22771, 214869, 138175, 7480, 3671
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-C69 -- 2013 CL89
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-C68 & 2013-C69 -- 2013 CL89, 2013 CK89
B70Sant Celoni Obs. in Spain, 1 in MPEC 2013-C66 -- 99942
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2013-C66, 2013-C68, 2013-C69 & 2013-C70 -- 2013 CY, 2013 CW32, 2013 CT82, 2013 CL89, 2013 CK89, 2013 CJ89, 2013 BO76, 2013 BE74, 2012 VA5
926Tenagra II Obs. in Arizona, 1 in MPEC 2013-C68 -- 2013 CK89
I76Tesla Obs. in Spain, 2 in MPEC 2013-C66 -- 2010 QD2, 2008 DG17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 February '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 CU83JPL Sentry16432028-2111659.3e-08-5.14-5.510JPL: "Analysis based on 18 observations spanning 2.8956 days (2013-Feb-10.40949 to 2013-Feb-13.305115)." Diameter approximately 0.191 km. from mean, weighted H=21.2.
NEODyS16432025-208253.82e-09-6.39-6.550NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2013-02-10.410 to 2013-02-13.306."
2013 CT82JPL Sentry16432015-2099309.7e-08-2.73-2.920JPL: "Analysis based on 28 observations spanning 5.7311 days (2013-Feb-08.48634 to 2013-Feb-14.21748)." Diameter approximately 0.898 km. from mean, weighted H=17.9.
NEODyS16432015-2097372.06e-07-2.84-3.510NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2013-02-08.487 to 2013-02-14.218."
2013 CL22JPL Sentry1643206433.6e-06-5.39-5.560JPL: "Analysis based on 63 observations spanning 7.4100 days (2013-Feb-05.05792 to 2013-Feb-12.467875)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
2013 CYJPL Sentry16432069-208552.9e-06-7.47-7.940JPL: "Analysis based on 69 observations spanning 11.951 days (2013-Feb-01.34874 to 2013-Feb-13.29949)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
NEODyS16432072-209275.9e-06-7.19-7.890NEODyS: "Based on 69 optical observations (of which 0 are rejected as outliers) from 2013-02-01.350 to 2013-02-13.300."
2013 BP73NEODyS16432078-209681.67e-05-2.41-2.650NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2013-01-22.244 to 2013-02-13.364."
2012 DA14JPL Sentry23162080-211132.1e-07-6.69-6.840JPL #3 for the day: "Analysis based on 305 observations spanning 356.52 days (2012-Feb-23.03431 to 2013-Feb-13.55751)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
NEODyS16432092-209824.4e-06-5.30-5.410NEODyS: "Based on 308 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2013-02-13.558."

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 14 February '13

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

2316Noted that JPL Sentry has updated its 2012 DA14 risk assessment - see above
1647Generated Traffic Report
1643Noted that JPL Sentry has reposted 2012 DA14 as an impact risk - see above
Noted that NEODyS has updated its 2012 DA14 risk assessment - see above
Noted that NEODyS has updated its 2013 BP73 risk assessment - see above
Noted that JPL Sentry has updated its 2013 CL22 risk assessment - see above
Noted that JPL Sentry has updated its 2013 CT82 risk assessment - see above
Noted that NEODyS has updated its 2013 CT82 risk assessment - see above
Noted that JPL Sentry has updated its 2013 CU83 risk assessment - see above
Noted that NEODyS has updated its 2013 CU83 risk assessment - see above
Noted that JPL Sentry has updated its 2013 CY risk assessment - see above
Noted that NEODyS has updated its 2013 CY risk assessment - see above
Grabbed MPEC 2013-C66 - Daily Orbit Update - see above
Grabbed MPEC 2013-C67 - 2011 WU95 - see above
Grabbed MPEC 2013-C68 - 2013 CK89 - see above
Grabbed MPEC 2013-C69 - 2013 CL89 - see above
Grabbed MPEC 2013-C70 - 2013 CJ89 - see above
Grabbed MPEC 2013-C71 - 2010 RK64 - see above
0018Noted that JPL Sentry has removed 2012 DA14 as an impact risk - see above