Contents  on 20 September '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 20 September '13

Four objects reported inside ten LD

There are four visitors reported to be within a radius of ten lunar distances (LD) from our home world today. Tiny risk-listed intruder 2013 RZ53, possibly an artificial object, leaves the Earth-Moon system at 2247 UT, cruising from 0.76 to 1.01 LD. Out further, 2013 RF74 is outbound from 6.32 to 7.75 LD, 2013 RM73 from 6.98 to 9.11 LD, and risk-listed 2013 RS43 exits ten LD, moving from 8.90 to 10.16 LD.

This report was generated at 1512 UTC with first follow-up in today's DOU MPEC for 2013 RF74 and departed 2013 RY80.

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 20 September '13

The MPC's NEO Confirmation Page has 10 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had ten objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of sixteen 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 20 September '13

Minor Planet Electronic Circulars

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

MPEC 2013-S25 - "11:30 UT" - 2013 SF

<< DOU on 20 Sept. '13 >>  MPEC 2013-S24 - "06:05 UT" - Daily Orbit Update

Observers  on 20 September '13

Fifteen observers appear in today's MPECs.

CodeObserver / observatory
B88Bigmuskie Obs. in Italy, 1 in MPEC 2013-S24 -- 2013 QJ10
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-S25 -- 2013 SF
160Castelmartini Obs. in Italy, 8 in MPEC 2013-S24 -- 2013 PN43, 2013 OM9, 2013 MX5, 2013 BO76, 2010 TN54, 2009 CP5, 271480, 243147
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-S25 -- 2013 SF
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPEC 2013-S24 -- 2013 RL43, 2013 PU31, 2011 PT1, 2007 RV19, 2004 UL
448Desert Moon Obs. in New Mexico, 8 in MPEC 2013-S24 -- 2013 QJ36, 2012 ER14, 2003 WX25, 359592, 285263, 276786, 252793, 152558
Z81Estrella de Mar Obs., 2 in MPEC 2013-S24 -- 2013 RX80, 2013 QJ10
J95Great Shefford Obs. in England, 3 in MPECs 2013-S24 & 2013-S25 -- 2013 SF, 2013 RY80, 2013 RX80
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2013-S24 -- 329437
900Moriyama Obs. in Japan, 1 in MPEC 2013-S25 -- 2013 SF
A24New Millennium Obs. in Italy, 1 in MPEC 2013-S25 -- 2013 SF
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2013-S24 -- 2013 RM43
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-S25 -- 2013 SF
510Siegen Obs. in Germany, 1 in MPEC 2013-S24 -- 21088
J84South Obs. in England, 1 in MPEC 2013-S24 -- 2013 RF74
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 September '13

At last check (NEODyS and JPL at 2359 UTC) there was no risk monitoring news to report yet today. Visit the CRT to view activity in the last four weeks and our ephemerides page for a complete list of risk-rated objects under current observation or having recent news.

Chronology  on 20 September '13

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

1512Generated Traffic Report
1502Grabbed MPEC 2013-S24 - Daily Orbit Update - see above
Grabbed MPEC 2013-S25 - 2013 SF - see above