Contents  on 13 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 13 February '13

Four objects reported inside ten LD

Four objects are reported traveling inside ten lunar distances (LD) of Earth today. Intruder 2012 DA14 (risk-listed radar target) enters our planet's Hill sphere, passing from 3.97 to 2.58 LD, and, within the sphere, radar target 2013 BV15 comes its closest to Earth on this passage, reaching 3.70 LD at 0709 UT.

Further away, radar target 2013 BS45 is outbound from 4.93 to 5.06 LD and risk-listed intruder 2013 CY departs from inside ten LD, traveling from 9.41 to 10.03 LD.

Coming to the neighborhood next, newly announced 2013 CZ87 arrives inside ten LD tomorrow, as does 2013 CE82 also, and risk-listed 2007 EO88 arrives on March 15th.

This report was updated at 2026 UTC with new discovery 2013 CZ87 (MPEC) and radar observation of 2013 BS45. Today's first traffice report was generated at 1641 UTC with radar follow-up for 2013 BV15.

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.

Radar Astrometry  on 13 February '13

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 1639 UTC when the database was dated 12 Feb.

Data update noted at 1819 UTC when the database was dated 13 Feb.

NEOCP Activity  on 13 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, 22 were "one nighters." So far The Tracking News has counted a total of 56 listings on the NEOCP today.

New MPECs  on 13 February '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-C65 - "18:26 UT" - 2013 CB88

MPEC 2013-C64 - "18:18 UT" - 2013 CA88

MPEC 2013-C63 - "18:13 UT" - 2013 CZ87

MPEC 2013-C62 - "17:02 UT" - 2013 CW87

<< DOU on 13 Feb. '13 >>  MPEC 2013-C61 - "06:04 UT" - Daily Orbit Update

Observers  on 13 February '13

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

CodeObserver / observatory
B17AZT-8 Evpatoria in the Ukraine, 1 in MPEC 2013-C61 -- 99942
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPECs 2013-C61 & 2013-C63 -- 2013 CZ87, 2013 CW35, 2013 CT36, 2013 CQ35, 2013 CN35, 2013 BC18, 2013 AV60, 2013 AU76, 2013 AM60, 2013 AL11, 2013 AB53, 2013 AA53, 2012 YH7, 2012 XS93
K31Bellino Obs., 2 in MPEC 2013-C61 -- 262623, 11284
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-C61 -- 2013 CV83
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-C63 -- 2013 CZ87
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-C63 -- 2013 CZ87
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2013-C61 & 2013-C63 -- 2013 CZ87, 2013 CT83
253Goldstone DSS-14 70m antenna in southern California, 2 in radar -- 2013 BV15, 2013 BS45
C40Kuban State Univ. Obs. in Russia, 1 in MPEC 2013-C61 -- 99942
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2013-C62 -- 2013 CW87
5682David Tholen's team on Mauna Kea in Hawaii, 3 in MPEC 2013-C61 -- 2013 BT18, 2013 BS18, 2013 BR45
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-C62 -- 2013 CW87
711McDonald Obs. in Texas, 1 in MPEC 2013-C64 -- 2013 CA88
A24New Millennium Obs. in Italy, 20 in MPEC 2013-C61 -- 2013 AU76, 2012 TJ146, 2009 BL2, 2005 DD, 1999 CT8, 85990, 350513, 343098, 25916, 22753, 154347, 153267, 137925, 136993, 5828, 4486, 4179, 1981, 1866, 1864
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-C61 -- 39796
F51Pan-STARRS 1 (PS1) in Hawaii, 11 in MPECs 2013-C61, 2013-C62, 2013-C64 & 2013-C65 -- 2013 CW87, 2013 CB88, 2013 CA88, 2012 YK7, 2012 VL94, 39572, 351815, 307161, 164207, 159923, 152889
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2013-C61 -- 2013 CR35, 2013 AU76, 2012 XF112, 2012 QP17, 2010 GE25, 2008 DG17, 2005 DD, 99942
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2013-C61 -- 3752
H36Sandlot Obs. in Kansas, 3 in MPECs 2013-C61, 2013-C63 & 2013-C65 -- 2013 CZ87, 2013 CW32, 2013 CB88
B70Sant Celoni Obs. in Spain, 1 in MPEC 2013-C61 -- 99942
C24Seveso Obs., 1 in MPEC 2013-C61 -- 2013 CR35
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2013-C61, 2013-C64 & 2013-C65 -- 2013 CB88, 2013 CA88, 2013 BJ18, 2013 BF18
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2013-C63 -- 2013 CZ87
718Wiggins Obs. in Utah, 2 in MPEC 2013-C61 -- 2013 CT36, 2013 CR35
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 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.





Notes for Today's Latest Risk Assessments
2013 CU83NEODyS16392018-2100376.88e-08-4.77-5.250NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2013-02-10.410 to 2013-02-12.305."

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 13 February '13

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

2026Updated Traffic Report
1901Grabbed MPEC 2013-C64 - 2013 CA88 - see above
Grabbed MPEC 2013-C65 - 2013 CB88 - see above
1819Grabbed MPEC 2013-C63 - 2013 CZ87 - see above
Noted Radar Astrometry database update - see above
1710Grabbed MPEC 2013-C62 - 2013 CW87 - see above
1639Noted that NEODyS has posted 2013 CU83 as an impact risk - see above
Grabbed MPEC 2013-C61 - Daily Orbit Update - see above
Noted Radar Astrometry database update - see above