Contents  on 21 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 21 March '13

Five objects reported inside ten LD

There are five objects reported traveling within ten lunar distances (LD) of our planet today. 2013 FG is inbound from 7.8 to 6.1 LD* and 2013 ES11 from 7.76 to 6.66 LD, while unrecovered 2007 EO88 (risk-listed radar target) is outbound from 6.8 to 8.7 LD*, 2013 ED68 from 7.36 to 8.81 LD, and radar-target intruder 2013 EC20 from 7.64 to 8.27 LD.

Coming into the neighborhood next, 2013 FD8 arrives inside ten LD on March 24th, and 2013 FB8 and risk-listed 2013 EL89 both arrive on March 25th.

This report was generated at 1355 UTC with follow-up in today's DOU MPEC for 2013 FB8, 2013 EL89, and 2013 ES11, departed objects 2013 FK and 2013 EE68, and distant 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 21 March '13

The MPC's NEO Confirmation Page has 7 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of 22 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 21 March '13

Minor Planet Electronic Circulars

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

MPEC 2013-F39 - "19:28 UT" - 2013 FM9

MPEC 2013-F38 - "19:24 UT" - 2013 FL9

<< DOU on 21 Mar. '13 >>  MPEC 2013-F37 - "06:06 UT" - Daily Orbit Update

Observers  on 21 March '13

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2013-F37, 2013-F38 & 2013-F39 -- 2013 FM9, 2013 FL9, 2013 EV89, 2013 EO89, 2013 EH89, 2013 EC28, 2013 CQ35, 2013 CN128, 2013 CK89, 2013 AE69, 2012 VO6, 2008 JP14, 99942, 350513, 141447
C77Bernezzo Obs. in Italy, 3 in MPEC 2013-F37 -- 2013 FC8, 2013 ES11, 2005 EM30
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-F37 -- 214869
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2013-F37 -- 2013 EA, 2005 EM30, 2001 TA2, 214869, 5693, 2329
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2013-F37 -- 2013 EH89, 2013 CN128, 2013 CL89, 2013 AQ72
448Desert Moon Obs. in New Mexico, 4 in MPEC 2013-F37 -- 2013 EV89, 2013 EM89, 345853, 185853
C73Galati Obs. in Romania, 1 in MPEC 2013-F37 -- 68216
585Kiev Comet Station in the Ukraine, 1 in MPEC 2013-F37 -- 99942
711McDonald Obs. in Texas, 8 in MPECs 2013-F37 & 2013-F38 -- 2013 FL9, 2013 FC8, 2013 FB8, 2013 EO126, 2013 EN126, 2013 CL118, 2002 JR9, 141531
900Moriyama Obs. in Japan, 1 in MPEC 2013-F37 -- 2013 EP89
474Mt. John Obs. in New Zealand, 7 in MPEC 2013-F37 -- 2013 FK, 2013 EX89, 2013 ES89, 2013 EL89, 2013 EJ89, 2013 EH68, 2013 EE68
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2013-F37 & 2013-F39 -- 2013 FM9, 2013 EW108, 1995 DW1
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPECs 2013-F37 & 2013-F38 -- 2013 FL9, 2013 EM20, 2012 QO10, 2010 GY6, 285571, 216689, 1685, 719
V05Rusty Mtn. Obs., 1 in MPEC 2013-F37 -- 2013 EW108
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-F39 -- 2013 FM9
Y28Sertao de Itaparica Obs. (OASI) in Brazil, 8 in MPEC 2013-F37 -- 86667, 85628, 312473, 308127, 242450, 209924, 162186, 154007
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2013-F37 -- 2013 FK, 2013 EU9, 137044
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2013-F37 -- 2013 ES89, 2013 ER89, 2013 EM20, 2013 EL28, 2013 EK28, 2013 EJ89, 2013 EH68
A84TUBITAK Natl. Obs. in Turkey, 1 in MPEC 2013-F37 -- 99942
I76Tesla Obs. in Spain, 3 in MPEC 2013-F37 -- 2013 EA, 2009 UM3, 2005 EM30
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 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 FKJPL Sentry1353209411.2e-08-7.43-7.430JPL: "Analysis based on 19 observations spanning 2.8803 days (2013-Mar-17.73917 to 2013-Mar-20.6195)." Diameter approximately 0.075 km. from mean, weighted H=23.3.
2013 EL89JPL Sentry13532097-210228.9e-08-7.81-7.890JPL: "Analysis based on 34 observations spanning 5.8876 days (2013-Mar-14.25151 to 2013-Mar-20.1391)." Diameter approximately 0.023 km. from mean, weighted H=25.9.
NEODyS1353R E M O V E D-
2013 EH68JPL Sentry1353R E M O V E DJPL: Risk listing removed at 0953 UTC.
NEODyS1353R E M O V E D-

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 21 March '13

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

2121Grabbed MPEC 2013-F38 - 2013 FL9 - see above
Grabbed MPEC 2013-F39 - 2013 FM9 - see above
1355Generated Traffic Report
1353Noted that JPL Sentry has removed 2013 EH68 as an impact risk - see above
Noted that NEODyS has removed 2013 EH68 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 EL89 risk assessment - see above
Noted that NEODyS has removed 2013 EL89 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 FK risk assessment - see above
Grabbed MPEC 2013-F37 - Daily Orbit Update - see above