Contents on 5 May '12
- Traffic Report -- two objects
- IAU Minor Planet Center
- Observers -- eight observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 455 risk-listed objects, 29 have had news in the last 31 days. Updated at 1607 UTC on 5 May.
- 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 5 May
- 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 5 May '12
Two objects reported inside ten LD
Two asteroids are reported traveling inside ten lunar distances (LD) of our planet today. 2012 HA34 is outbound from 7.35 to 9.85 LD and radar target 2012 HM exits ten LD, moving from 9.55 to 10.98 LD. Next up, 2010 KK37 arrives inside ten LD on May 15th.
This report was generated at 1609 UTC with follow-up in today's DOU MPEC for 2012 HG2.
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 5 May '12
The MPC's NEO Confirmation Page is currently empty
The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2359 UTC). It was last noted active yesterday.
New MPECs on 5 May '12
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observations of risk-listed objects
- K12H02G 2012 HG2 (small asteroid, arc=14 days, H=27.0 ~13m, close passer) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (May 4.25-28p3)
- Observations of small asteroids (H>22.0)
- K12J00A 2012 JA (arc=3 days, H=24.8 ~37m) from Holmes/CTIO (May 4.42-43p2)
- K12H31H 2012 HH31 (arc=7 days, H=23.8 ~59m) from Holmes/CTIO (May 4.15-17p4)
- K12H13N 2012 HN13 (arc=13 days, H=22.9 ~89m) from Holmes/CTIO (May 4.33-35p4)
- K12H02R 2012 HR2 (arc=14 days, H=23.1 ~81m) from Holmes/CTIO (May 4.36-37p5)
- K12H02B 2012 HB2 (arc=15 days, H=25.8 ~23m) from Holmes/CTIO (May 4.39-40p2)
- K12F01D 2012 FD1 (arc=38 days, H=22.7 ~98m) from the Mt. Lemmon Survey (MLS) (March 13.25-28p4)
- K04RP2Q 2004 RQ252 (arc=2 opp, H=22.4 ~112m) from Los Molinos Obs. (April 25.28-29p5)
- Observations of other asteroidal objects
- K12H34C 2012 HC34 (i=36.4°, arc=6 days, H=20.1 ~323m) from Holmes/CTIO (May 4.13-15p3)
- K12H31G 2012 HG31 (arc=19 days, H=18.9 ~562m) from Holmes/CTIO (May 4.18p3)
- K12H20D 2012 HD20 (arc=10 days, H=21.7 ~155m) from Holmes/CTIO (May 4.29-30p2)
- K12F62N 2012 FN62 (Q=5.264 AU, arc=51 days, H=17.7 ~977m) from Pan-STARRS 1 (PS1) (Feb. 28.51-56p4) and MLS (March 16.42-44p4)
- K12F35L 2012 FL35 (q=0.376 AU, arc=42 days, H=19.7 ~389m) from Holmes/CTIO (May 4.11-13p4)
- K12E11Z 2012 EZ11 (arc=29 days, H=21.4 ~178m) from MLS (March 14.51p3)
- K10L14J 2010 LJ14 (arc=2 opp, H=17.8 ~933m) from the Spacewatch 0.9m telescope (April 24.45-48p3)
- K08CB9C 2008 CC119 (arc=2 opp, H=18.6 ~645m) from the Catalina Sky Survey (CSS) (April 11.12-14p4)
- K06V13Y 2006 VY13 (Q=4.718 AU, arc=2 opp, H=17.2 ~1.23 km) from Spacewatch 0.9m (April 13.46-49p3)
- J98H03J 1998 HJ3 (arc=3 opp, H=18.8 ~589m) from CSS (April 23.21-22p4)
- V7643 317643 2003 FH1 from Crni Vrh Obs. (March 10.11-15p4)
- 07889 7889 1994 LX from LINEAR (May 4.15-19p5)
Observers on 5 May '12
Eight observers appear in today's MPEC.
|Code||Observer / observatory|
|703||Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2012-J17 -- 2008 CC119, 1998 HJ3|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPEC 2012-J17 -- 2012 JA, 2012 HR2, 2012 HN13, 2012 HH31, 2012 HG31, 2012 HG2, 2012 HD20, 2012 HC34, 2012 HB2, 2012 FL35|
|106||Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-J17 -- 317643|
|704||LINEAR in New Mexico, 1 in MPEC 2012-J17 -- 7889|
|844||Los Molinos Obs. in Uruguay, 1 in MPEC 2012-J17 -- 2004 RQ252|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2012-J17 -- 2012 FN62, 2012 FD1, 2012 EZ11|
|F51||Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-J17 -- 2012 FN62|
|691||Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-J17 -- 2010 LJ14, 2006 VY13|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 5 May '12
Notes for Today's Latest Risk Assessments
|2012 HG2||JPL Sentry||1605||2053-2072||94||1.3e-03||-4.10||-4.51||0||JPL: "Analysis based on 152 observations spanning 13.906 days (2012-Apr-20.37147 to 2012-May-04.27795)." Diameter approximately 0.014 km. from mean, weighted H=27.0.|
|NEODyS||1605||2053-2091||247||1.12e-03||-4.16||-4.89||0||NEODyS: "Based on 149 optical observations (of which 9 are rejected as outliers) from 2012-04-20.372 to 2012-05-04.279."|
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 5 May '12
Times are UTC for when items were noted or added by The Tracking News.
|1609||Generated Traffic Report|
|1605||Noted that JPL Sentry has updated its 2012 HG2 risk assessment - see above|
Noted that NEODyS has updated its 2012 HG2 risk assessment - see above
Grabbed MPEC 2012-J17 - Daily Orbit Update - see above