Contents  on 5 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 5 February '13

Three objects reported inside ten LD

There are three objects reported moving within ten lunar distances (LD) of Earth today. 2013 BA74 is inbound from 4.97 to 4.51 LD and radar target 2013 BS45 from 6.87 to 6.40 LD, while risk-listed intruder 2013 CY is outbound from 4.69 to 5.27 LD.

Headed our way next, 2013 BV15 and intruder 2012 DA14 (risk-listed radar target) arrive inside ten LD on February 8th.

This report was updated at 2306 UTC to note that the January recovery observations of 2012 DA14 have been restated with revised positions (MPEC). Today's first traffic report was generated at 1648 UTC with follow-up in today's DOU MPEC for 2013 CY, 2013 BA74, 2013 BS45, 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 5 February '13

The MPC's NEO Confirmation Page has 31 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 31 objects listed. Of these, nineteen were "one nighters." So far The Tracking News has counted a total of 35 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 5 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-C19 - "22:26 UT" - 2012 DA14

MPEC 2013-C18 - "14:21 UT" - 2013 CY10

MPEC 2013-C17 - "14:16 UT" - 2013 CX10

MPEC 2013-C16 - "14:11 UT" - 2013 BW76

<< DOU on 5 Feb. '13 >>  MPEC 2013-C15 - "06:02 UT" - Daily Orbit Update

Observers  on 5 February '13

A total of 24 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPECs 2013-C15, 2013-C16 & 2013-C17 -- 2013 CX10, 2013 BW76, 2013 BC74, 2013 AV60, 2013 AM60, 2013 AG76, 2013 AB53
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-C16 -- 2013 BW76
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-C15 -- 2013 CY
448Desert Moon Obs. in New Mexico, 1 in MPEC 2013-C15 -- 2012 RN6
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-C15 -- 2013 CZ
J95Great Shefford Obs. in England, 1 in MPEC 2013-C15 -- 2013 BA74
C40Kuban State Univ. Obs. in Russia, 1 in MPEC 2013-C15 -- 99942
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-C15 -- 2013 CY
W87LCOGT Cerro Tololo C in Chile, 1 in MPEC 2013-C15 -- 2013 CY
304Las Campanas Obs. in Chile, 1 in MPEC 2013-C19 -- 2012 DA14
560Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2013-C15 -- 2010 QD2
5682David Tholen's team on Mauna Kea in Hawaii, 6 in MPECs 2013-C15 & 2013-C18 -- 2013 CY10, 2013 BH18, 2013 BE27, 2013 AP60, 2013 AP27, 2012 XF17
711McDonald Obs. in Texas, 1 in MPEC 2013-C15 -- 2013 BS45
C91Montevenere Obs., 3 in MPEC 2013-C15 -- 99942, 4486, 4179
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2013-C16 & 2013-C17 -- 2013 CX10, 2013 BW76
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2013-C15 -- 137925
C27Pallerols Obs. in Spain, 2 in MPEC 2013-C15 -- 99942, 4179
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2013-C15, 2013-C17 & 2013-C18 -- 2013 CY10, 2013 CY, 2013 CX10, 2008 MR1
233San Vito Obs. in Italy, 1 in MPEC 2013-C15 -- 154347
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-C15 & 2013-C17 -- 2013 CX10, 2013 AS27
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-C16 -- 2013 BW76
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-C15 -- 1998 QR15
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2013-C15, 2013-C16 & 2013-C18 -- 2013 CY10, 2013 BW76, 2013 BE74, 2013 BC18, 2012 XP111, 2012 VO6, 2012 VC82, 2010 EW45
I89iTelescope Obs. Nerpio in Spain, 2 in MPEC 2013-C15 -- 2013 BV15, 99942
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 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 CYJPL Sentry16432069-211074.3e-06-7.31-7.770JPL: "Analysis based on 50 observations spanning 3.0317 days (2013-Feb-01.34874 to 2013-Feb-04.380486)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
NEODyS16432069-209251.53e-06-7.77-8.320NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2013-02-01.350 to 2013-02-04.381."

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 5 February '13

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

2306Updated Traffic Report
2247Grabbed MPEC 2013-C19 - 2012 DA14 - see above
1643Noted 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-C15 - Daily Orbit Update - see above
Grabbed MPEC 2013-C16 - 2013 BW76 - see above
Grabbed MPEC 2013-C17 - 2013 CX10 - see above
Grabbed MPEC 2013-C18 - 2013 CY10 - see above