Contents on 15 April '12
- Traffic Report -- one object
- IAU Minor Planet Center
- Observers -- seven observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 452 risk-listed objects, 23 have had news in the last 31 days. Updated at 1624 UTC on 15 April.
- 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 15 April
- 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 15 April '12
One object reported inside ten LD
One object may be inside ten lunar distances (LD) of our planet today. Returning 2007 HV4 is calculated to be moving from 9.7 to 8.0 LD, with an Earth passage uncertainty of +/- 1.748 days.
Next up, radar target 2012 GP1 arrives inside ten LD on April 17th and 1992 JD on April 30th (uncertainty +/- 4.600 hours).
This report was generated at 1625 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 15 April '12
The MPC's NEO Confirmation Page has 55 listings
When last checked at 2317 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 55 objects listed. Of these, 49 were "one nighters." So far The Tracking News has counted a total of 63 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 15 April '12
Minor Planet Electronic Circulars
As of last check at 2317 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observation campaigns (radar support, potential mission destinations)
- K00SY4J 2000 SJ344 (arc=4 opp, H=22.6 ~102m, PMD) from Pan-STARRS 1 (PS1) (April 14.33-38p4 at w=22.0-22.2)
- 18109 18109 2000 NG11 (PMD) from PS1 (April 14.34-37p3)
-- Potential mission destinations list & ephemerides + NHATS
- Observations of small asteroids (H>22.0)
- K12G02D 2012 GD2 (arc=3 days, H=22.9 ~89m) from An Carraig Obs. (April 14.95-97p4)
- K12G02C 2012 GC2 (arc=1 day, H=23.1 ~81m) from PS1 (April 13.40-44p3) and Kevin Hills via RAS Obs. Moorook (April 13.47-48p3)
- Observations of other asteroidal objects
- K12E14S 2012 ES14 (Q=4.230 AU, arc=31 days, H=20.1 ~323m) from An Carraig Obs. (April 14.89-91p4)
- K12D31G 2012 DG31 (arc=3 opp, H=20.0 ~339m) from PS1 (April 13.45-48p3)
- K12D00O 2012 DO (arc=58 days, H=20.2 ~309m) from Vicksburg Obs. (April 14.36-37p3)
- K11Y15V 2011 YV15 (Q=4.394 AU, arc=3 opp, H=17.2 ~1.23 km) from PS1 (April 14.34-38p4)
- K11S32O 2011 SO32 (arc=205 days, H=21.2 ~195m) from PS1 (April 14.34-37p3 at w=21.7-22.1)
- K10OA1D 2010 OD101 (arc=2 opp, H=20.8 ~234m) from Bergisch Gladbach Obs. (April 13.92-95p3)
- K10L33R 2010 LR33 (arc=3 opp, H=18.1 ~812m) from PS1 (April 14.34-38p4)
- K06F35Y 2006 FY35 (arc=2 opp, H=19.4 ~446m) from KLENOT (2006 May 5.84p3)
- K05C00J 2005 CJ (arc=4 opp, H=20.2 ~309m) from PS1 (April 13.41-43p3 & 14.34-39p4)
- K02W00P 2002 WP (arc=4 opp, H=18.3 ~741m) from PS1 (April 14.55-56p2)
- V7643 317643 2003 FH1 from An Carraig Obs. (April 14.86-88p3)
- I9008 189008 1996 FR3 from PS1 (April 13.41-44p4)
- G2422 162422 2000 EV70 from PS1 (April 13.41-44p4)
- E4861 144861 2004 LA12 from PS1 (April 14.42-44p2)
- D6874 136874 1998 FH74 from PS1 (April 13.42-44p3)
- 66407 66407 1999 LQ28 from PS1 (April 14.47-48p2)
- 36183 36183 1999 TX16 from PS1 (April 14.42-43p2 & 14.49-50p2)
- 06455 6455 1992 HE from An Carraig Obs. (April 14.93-94p3)
- 01620 1620 Geographos (1951 RA) from LINEAR (April 14.13-17p4)
Observers on 15 April '12
Seven observers appear in today's MPEC.
|Code||Observer / observatory|
|J16||An Carraig Obs. in Northern Ireland, 4 in MPEC 2012-G48 -- 2012 GD2, 2012 ES14, 317643, 6455|
|621||Bergisch Gladbach Obs. in Germany, 1 in MPEC 2012-G48 -- 2010 OD101|
|246||KLENOT in the Czech Republic, 1 in MPEC 2012-G48 -- 2006 FY35|
|704||LINEAR in New Mexico, 1 in MPEC 2012-G48 -- 1620|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 15 in MPEC 2012-G48 -- 2012 GC2, 2012 DG31, 2011 YV15, 2011 SO32, 2010 LR33, 2005 CJ, 2002 WP, 2000 SJ344, 66407, 36183, 189008, 18109, 162422, 144861, 136874|
|D90`||Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2012-G48 -- 2012 GC2|
|H47||Vicksburg Obs. in Mississippi, 1 in MPEC 2012-G48 -- 2012 DO|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 15 April '12
Notes for Today's Latest Risk Assessments
|2012 GE5||NEODyS||1624||2049-2049||1||1.29e-07||-7.47||-7.47||0||NEODyS: "Based on 6 optical observations (of which 0 are rejected as outliers) from 2012-04-12.359 to 2012-04-13.257."|
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.