Contents on 28 December '12
- Traffic Report -- two objects
- IAU Minor Planet Center
- Impact Risk Monitoring -- nothing to report
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 474 risk-listed objects, 26 have had news in the last 31 days. Updated at 1528 UTC on 28 Dec.
- Ephemerides for risk-rated & nearby objects + potential mission destinations
- News image catalog
- News old archive & Small Objects Archive
- Object Links - mainly for radar targets & close passers - updated 23 Dec.
- Observing Campaigns
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 28 December '12
Two objects reported inside ten LD
Two objects are reported moving within ten lunar distances (LD) of Earth today. Radar target 2012 XM55 is outbound from 4.01 to 4.45 LD and 2012 XP55 exits ten LD, traveling from 9.36 to 10.47 LD. No other objects are known to come this close until intruder 2012 DA14, a risk-listed radar target, arrives inside ten LD on February 8th.
This report was generated at 1611 UTC.
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 28 December '12
The MPC's NEO Confirmation Page has 17 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seventeen objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of 25 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 28 December '12
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there have been no MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
When no Daily Orbit Update (DOU) MPEC has been posted by this time of day, visit the MPC Status Page for possible explanation.
Observers on 28 December '12
Without MPECs with observations to report, we have no observers to list yet today. For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.
Impact Risk Monitoring on 28 December '12
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 28 December '12
Times are UTC for when items were noted or added by The Tracking News.
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