Contents  on 26 March '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 26 March '13

Six objects reported inside ten LD

There are six asteroids reported traveling inside ten lunar distances (LD) of Earth today. Risk-listed 2013 EL89 is inbound from 9.16 to 7.49 LD, radar target 2013 FB8 from 9.23 to 7.71 LD, and 2013 FD8 from 9.09 to 8.54 LD, while 2013 FG is outbound from 5.12 to 6.69 LD, risk-listed 2013 FU13 from 8.5 to 9.7 LD*, and 2013 ES11 exits ten LD, moving from 9.72 to 11.64 LD.

Up next, risk-listed 2010 GM23 arrives inside ten LD on April 10th.

This report was generated at 1353 UTC with follow-up in today's DOU MPEC for 2013 FB8 and observation of distant objects 2003 FY6 and 68216 2001 CV26.

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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 26 March '13

The MPC's NEO Confirmation Page has 3 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of six 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 26 March '13

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-F54 - "19:46 UT" - 2013 FX13

MPEC 2013-F53 - "19:42 UT" - 2013 FY13

MPEC 2013-F52 - "19:38 UT" - 2013 FW13

<< DOU on 26 Mar. '13 >>  MPEC 2013-F51 - "06:04 UT" - Daily Orbit Update

Observers  on 26 March '13

Eighteen observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-F53 -- 2013 FY13
H21Astronomical Research Obs. Westfield in Illinois, 7 in MPEC 2013-F51 -- 2013 FC8, 2013 EW108, 2013 EQ4, 2013 EO126, 2013 EH68, 2013 AM60, 2012 VO6
I47Auger Obs. in Argentina, 1 in MPEC 2013-F53 -- 2013 FY13
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2013-F52 & 2013-F54 -- 2013 FX13, 2013 FW13
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPECs 2013-F51 & 2013-F53 -- 2013 FZ7, 2013 FY13, 2013 FX7, 2013 FQ10, 2013 FD11, 2013 EZ108, 2013 EV89, 2013 ES89, 2013 ER89, 2013 DM1, 2013 AU27, 2010 GE25
448Desert Moon Obs. in New Mexico, 4 in MPEC 2013-F51 -- 2013 EV108, 2011 BK24, 275974, 152889
I48El Catalejo Obs. in Argentina, 1 in MPEC 2013-F53 -- 2013 FY13
A27Eridanus Obs. in Germany, 1 in MPEC 2013-F51 -- 4179
E89Geyserland Obs. in New Zealand, 1 in MPEC 2013-F51 -- 96315
695^Spacewatch via Kitt Peak Natl. Obs. (KPNO) in Arizona, 3 in MPEC 2013-F51 -- 2010 JF88, 2009 WN, 2007 YZ
K38M57 Obs., 1 in MPEC 2013-F51 -- 2013 AU76
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2013-F52, 2013-F53 & 2013-F54 -- 2013 FY13, 2013 FX13, 2013 FW13
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2013-F52 & 2013-F54 -- 2013 FX13, 2013 FW13
A24New Millennium Obs. in Italy, 12 in MPEC 2013-F51 -- 2009 AV, 99942, 68216, 214869, 137199, 11405, 5828, 5645, 4179, 3752, 2062, 1866
I41Palomar Transient Factory in southern California, 1 in MPEC 2013-F51 -- 356285
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPECs 2013-F51 & 2013-F53 -- 2013 FY13, 2013 FX7, 2009 FG1, 2008 GB110, 2003 FY6
718Wiggins Obs. in Utah, 1 in MPEC 2013-F51 -- 2013 FB8
Q621program code 1 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-F53 -- 2013 FY13
Q622program code 2 via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-F53 -- 2013 FY13
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 March '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 FW13JPL Sentry22162027-2108115.5e-09-6.42-7.090JPL: "Analysis based on 24 observations spanning 2.9562 days (2013-Mar-23.47435 to 2013-Mar-26.43053)." Diameter approximately 0.160 km. from mean, weighted H=21.6.

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 26 March '13

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

2216Noted that JPL Sentry has posted 2013 FW13 as an impact risk - see above
Grabbed MPEC 2013-F52 - 2013 FW13 - see above
Grabbed MPEC 2013-F53 - 2013 FY13 - see above
Grabbed MPEC 2013-F54 - 2013 FX13 - see above
1353Generated Traffic Report
1345Grabbed MPEC 2013-F51 - Daily Orbit Update - see above