Contents on 31 December '12
- Traffic Report -- one object
- IAU Minor Planet Center
- Observers -- seventeen observers
- Impact Risk Monitoring -- one object
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 1616 UTC on 31 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 31 December '12
One object reported inside ten LD
One object is reported to be within ten lunar distances (LD) of Earth today. Radar target 2012 XM55 is outbound from 5.44 to 5.97 LD. The next known object to be coming inside ten LD is intruder 2012 DA14, a risk-listed radar target that arrives on February 8th.
This report was generated at 1619 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 31 December '12
The MPC's NEO Confirmation Page has 30 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 30 objects listed. Of these, 21 were "one nighters." So far The Tracking News has counted a total of 39 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 31 December '12
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 2012-Y41 time-stamped "06:02 UT" - Daily Orbit Update - see below
- MPEC 2012-Y42 time-stamped "13:23 UT" - 2012 YY6 - see below
- MPEC 2012-Y43 time-stamped "06:18 UT" - Numbering of Periodic Comets 272P-275P
MPEC 2012-Y43 - "06:18 UT" - Numbering of Periodic Comets 272P-275P
MPEC 2012-Y42 - "13:23 UT" - 2012 YY6
- K12Y06Y 2012 YY6 (Earth MOID=14.0 LD, i=4.0°, H=21.4 ~178m) from Pan-STARRS 1 (PS1) (Dec. 29.23-24p2), Great Shefford Obs. (Dec. 29.78-80p3), Schiaparelli Obs. (Dec. 29.87-90p3), Valdicerro Obs. (Dec. 29.89-93p3), Sandlot Obs. (Dec. 30.18-19p4), Hoyerswerda Obs. (Dec. 30.70p2), New Millennium Obs. (Dec. 30.75-76p3), Farra d'Isonzo Obs. (Dec. 30.85-88p3), St. Pardon de Conques Obs. (Dec. 30.97-98p3), and Bisei Spaceguard Center (Dec. 31.41p4)
- Observations of risk-listed objects
- 99942 99942 Apophis (2004 MN4) (PMD, radar support) from Ceccano Obs. (Dec. 29.07-08p3) and PS1 (Dec. 29.57-58p4)
- Observation campaigns (radar support, potential mission destinations)
- 04179 4179 Toutatis (1989 AC) (radar) from Kurihara Obs. (Dec. 26.44-45p4) and Nonndorf Obs. (Dec. 28.95-97p4)
-- Potential mission destinations (PMD) list & ephemerides + NHATS -- Planetary radar schedules: Arecibo & Goldstone
- Observations of other asteroidal objects
- K12U68S 2012 US68 (q=0.105 AU, Q=4.901 AU, arc=57 days, H=18.3 ~741m) from David Tholen's team on Mauna Kea (Dec. 14.39p1 at R=22.9)
- K12TL9A 2012 TA219 (Q=4.124 AU, arc=2 opp, H=18.1 ~812m) from NEAT's GEODSS Haleakala telescope (1996 April 23.56-60p3)
- K12Q17P 2012 QP17 (Q=4.682 AU, arc=137 days, H=18.5 ~676m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Dec. 29.03-05p5)
- K12M06L 2012 ML6 (arc=47 days, H=20.2 ~309m) from Holmes/CTIO (July 10.32-33p4)
- I9011 189011 Ogmios (1997 NJ6) from PS1 (Dec. 29.59-60p2)
- F4347 154347 2002 XK4 from Nonndorf Obs. (Dec. 29.02-03p4)
- 05836 5836 1993 MF from Panker Obs. (Dec. 7.72-73p3)
- 05587 5587 1990 SB from Panker Obs. (Dec. 7.75-76p4)
Observers on 31 December '12
Seventeen observers appear in today's MPECs.
|Code||Observer / observatory|
|300||Bisei Spaceguard Center in Japan, 1 in MPEC 2012-Y42 -- 2012 YY6|
|470||Ceccano Obs. in Italy, 1 in MPEC 2012-Y41 -- 99942|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPEC 2012-Y41 -- 2012 QP17, 2012 ML6|
|595||Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-Y42 -- 2012 YY6|
|J95||Great Shefford Obs. in England, 1 in MPEC 2012-Y42 -- 2012 YY6|
|C43||Hoyerswerda Obs. in Germany, 1 in MPEC 2012-Y42 -- 2012 YY6|
|D95||Kurihara Obs. in Japan, 1 in MPEC 2012-Y41 -- 4179|
|5682||David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-Y41 -- 2012 US68|
|566||NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2012-Y41 -- 2012 TA219|
|A24||New Millennium Obs. in Italy, 1 in MPEC 2012-Y42 -- 2012 YY6|
|C47||Nonndorf Obs. in Austria, 2 in MPEC 2012-Y41 -- 154347, 4179|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2012-Y41 & 2012-Y42 -- 2012 YY6, 99942, 189011|
|A32||Panker Obs. in Germany, 2 in MPEC 2012-Y41 -- 5836, 5587|
|H36||Sandlot Obs. in Kansas, 1 in MPEC 2012-Y42 -- 2012 YY6|
|204||Schiaparelli Obs. in Italy, 1 in MPEC 2012-Y42 -- 2012 YY6|
|I93||St. Pardon de Conques Obs. in France, 1 in MPEC 2012-Y42 -- 2012 YY6|
|C92||Valdicerro Obs. in Italy, 1 in MPEC 2012-Y42 -- 2012 YY6|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 31 December '12
Notes for Today's Latest Risk Assessments
|2012 UE34||NEODyS||1616||2095-2100||5||1.16e-06||-5.44||-5.53||0||NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2012-10-18.394 to 2012-12-13.332."|
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 31 December '12
Times are UTC for when items were noted or added by The Tracking News.
|1645||Grabbed MPEC 2012-Y43 - Numbering of Periodic Comets 272P-275P - see above|
|1619||Generated Traffic Report|
|1616||Noted that NEODyS has updated its 2012 UE34 risk assessment - see above|
Grabbed MPEC 2012-Y41 - Daily Orbit Update - see above
Grabbed MPEC 2012-Y42 - 2012 YY6 - see above