Contents  on 4 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 4 February '13

Three objects reported inside ten LD

Three asteroids are reported traveling within ten lunar distances (LD) of our planet today. Risk-listed intruder 2013 CY is outbound from 4.12 to 4.69 LD while 2013 BA74 is inbound from 5.85 to 4.97 LD and radar target 2013 BS45 from 7.37 to 6.87 LD.

Next up, 2013 BV15 and intruder 2012 DA14 (risk-listed radar target) arrive inside ten LD on February 8th.

This report was generated at 1604 UTC with first follow-up for departed 2013 BD74 in today's DOU MPEC along with observation of 2013 CY, 2013 BA74, and 2013 BV15.

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 4 February '13

The MPC's NEO Confirmation Page has 18 listings

When last checked at 2205 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eighteen objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 26 listings on the NEOCP today.

New MPECs  on 4 February '13

Minor Planet Electronic Circulars

As of last check at 2205 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 4 Feb. '13 >>  MPEC 2013-C14 - "06:02 UT" - Daily Orbit Update

Observers  on 4 February '13

Fifteen observers appear in today's MPEC.

CodeObserver / observatory
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-C14 -- 2010 QD2
B88Bigmuskie Obs. in Italy, 2 in MPEC 2013-C14 -- 2013 AY52, 99942
5682David Tholen's team on Mauna Kea in Hawaii, 4 in MPEC 2013-C14 -- 2013 BD74, 2013 BA74, 2013 AB53, 2012 XP111
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-C14 -- 330825
A24New Millennium Obs. in Italy, 5 in MPEC 2013-C14 -- 2012 XF112, 22753, 154347, 137924, 4179
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-C14 -- 137925
I61Ourense Obs., 1 in MPEC 2013-C14 -- 4179
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPEC 2013-C14 -- 2013 BV15, 2013 BR45, 2013 AW52, 2012 MM11, 2009 KN4, 2007 LA15, 2006 BG55, 2001 RB18, 1998 QA1, 350513, 219071, 214869, 190161
B49Paus Obs. in Spain, 1 in MPEC 2013-C14 -- 99942
233San Vito Obs. in Italy, 1 in MPEC 2013-C14 -- 4179
204Schiaparelli Obs. in Italy, 10 in MPEC 2013-C14 -- 2013 AZ52, 2013 AQ27, 2013 AG53, 2013 AE53, 2013 AC, 2012 XJ55, 2012 TA79, 2012 QP10, 2004 SB56, 1989 VB
J84South Obs. in England, 1 in MPEC 2013-C14 -- 2013 CY
I76Tesla Obs. in Spain, 2 in MPEC 2013-C14 -- 2012 XF112, 2010 QD2
H78Univ. of Narino Obs. in Colombia, 1 in MPEC 2013-C14 -- 4179
I89iTelescope Obs. Nerpio in Spain, 1 in MPEC 2013-C14 -- 2013 BU15
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 February '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2205 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 CYJPL Sentry16022069-210663.2e-06-7.40-7.830JPL: "Analysis based on 38 observations spanning 1.6541 days (2013-Feb-01.34874 to 2013-Feb-03.00286)." Diameter approximately 0.008 km. from mean, weighted H=28.2.
NEODyS16022069-2099115.26e-06-7.21-7.990NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2013-02-01.350 to 2013-02-03.004."

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 4 February '13

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

1604Generated Traffic Report
1602Noted 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-C14 - Daily Orbit Update - see above