Contents on 1 June '12
- Traffic Report -- five objects
- IAU Minor Planet Center
- Observers -- thirteen observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 450 risk-listed objects, 22 have had news in the last 31 days. Updated at 1606 UTC on 1 June.
- 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 28 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 1 June '12
Five objects reported inside ten LD
There are five objects reported flying within ten lunar distances (LD) of our planet today. 2012 KC45 is outbound from 5.85 to 7.16 LD, 2012 KT12 from 6.92 to 7.72 LD, and 2012 KZ41 from 8.15 to 8.78 LD. Risk-listed intruder 2012 KP24 leaves ten LD, traveling from 9.64 to 12.51 LD, and intruder 2012 KT42 also departs, moving from 9.68 to 13.26 LD.
No other objects are known to be coming inside ten LD until November.
This report was generated at 1608 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 1 June '12
The MPC's NEO Confirmation Page has 6 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of fifteen 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 1 June '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-L01 time-stamped "06:04 UT" - Daily Orbit Update - see below
- MPEC 2012-L02 time-stamped "11:21 UT" - 2012 KL45 - see below
- MPEC 2012-L03 time-stamped "11:24 UT" - 2012 KM45
MPEC 2012-L03 - "11:24 UT" - 2012 KM45
- K12K45M 2012 KM45 (H=18.5 ~676m) from the Catalina Sky Survey (CSS) (May 29.19-20p4), Saint-Barthelemy Obs. (May 29.89-90p3), Volta Obs. (May 29.92-94p3), Great Shefford Obs. (May 29.92-93p3), New Millennium Obs. (May 29.92-94p3), Schiaparelli Obs. (May 29.94-97p3), Astronomical Research Obs. Westfield (May 30.13-15p3), Modra Obs. (May 30.90-92p3), and St. Pardon de Conques Obs. (May 31.89-91p3)
MPEC 2012-L02 - "11:21 UT" - 2012 KL45
- K12K45L 2012 KL45 (H=18.9 ~562m) from the Mt. Lemmon Survey (MLS) (May 28.46-47p4, 29.46p3 & 31.45p4), the Spacewatch 1.8m telescope (May 29.46p3), and ARO Westfield (May 30.36-37p3)
- Observations of risk-listed objects
- K12K42U 2012 KU42 (arc=6 days, H=17.2 ~1.23 km) from Spacewatch 1.8m (May 31.42p3)
- Observations of recently (no longer) risk-listed objects
- K12K18N 2012 KN18 (small asteroid, Q=4.378 AU, arc=9 days, H=24.6 ~41m) from ARO Westfield (May 31.16-18p5)
- Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K12K18O 2012 KO18 (arc=9 days, H=22.1 ~129m) from ARO Westfield (May 31.09-11p6)
- K12K11K 2012 KK11 (arc=12 days, H=25.2 ~31m) from Spacewatch 1.8m (May 31.31-32p3)
- K12K00X 2012 KX (arc=15 days, H=23.4 ~71m) from ARO Westfield (May 31.28-29p6)
- K12J11U 2012 JU11 (arc=17 days, H=24.9 ~35m) from Spacewatch 1.8m (May 31.39p3)
- K12K11N 2012 KN11 (arc=12 days, H=21.9 ~141m) from Spacewatch 1.8m (May 31.30p2)
- Observations of other asteroidal objects
- K12K11L 2012 KL11 (arc=12 days, H=21.1 ~204m) from Spacewatch 1.8m (May 31.35-36p2)
- K12K06C 2012 KC6 (arc=13 days, H=21.7 ~155m) from ARO Westfield (May 31.21-22p3)
- K12J16B 2012 JB16 (arc=17 days, H=19.7 ~389m) from ARO Westfield (May 31.11-13p6)
- K12H01J 2012 HJ1 (arc=45 days, H=17.8 ~933m) from ARO Westfield (May 31.13-14p2)
- K12D30U 2012 DU30 (arc=2 opp, H=18.2 ~776m) from ARO Westfield (May 31.30-31p3)
- K12D00O 2012 DO (arc=105 days, H=20.2 ~309m) from ARO Westfield (May 31.13-14p3)
- K11Y15V 2011 YV15 (Q=4.394 AU, arc=3 opp, H=17.2 ~1.23 km) from ARO Westfield (May 31.15-17p4)
- K10OA1D 2010 OD101 (arc=2 opp, H=20.8 ~234m) from Spacewatch 1.8m (May 31.24-25p3)
- K10L14J 2010 LJ14 (arc=2 opp, H=17.7 ~977m) from ARO Westfield (May 31.15-16p3)
- W6732 326732 2003 HB6 from the Spacewatch 0.9m telescope (May 31.16-20p2)
- 07889 7889 1994 LX from LINEAR (May 31.16-21p5)
- 04487 4487 Pocahontas (1987 UA) from ARO Westfield (May 31.37-38p3)
Observers on 1 June '12
Thirteen observers appear in today's MPECs.
|Code||Observer / observatory|
|H21||Astronomical Research Obs. Westfield in Illinois, 13 in MPECs 2012-L01, 2012-L02 & 2012-L03 -- 2012 KX, 2012 KO18, 2012 KN18, 2012 KM45, 2012 KL45, 2012 KC6, 2012 JB16, 2012 HJ1, 2012 DU30, 2012 DO, 2011 YV15, 2010 LJ14, 4487|
|703||Catalina Sky Survey in Arizona, 1 in MPEC 2012-L03 -- 2012 KM45|
|J95||Great Shefford Obs. in England, 1 in MPEC 2012-L03 -- 2012 KM45|
|704||LINEAR in New Mexico, 1 in MPEC 2012-L01 -- 7889|
|118||Modra Obs. in Slovakia, 1 in MPEC 2012-L03 -- 2012 KM45|
|G96||Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-L02 -- 2012 KL45|
|A24||New Millennium Obs. in Italy, 1 in MPEC 2012-L03 -- 2012 KM45|
|B04||Saint-Barthelemy Obs. in Italy, 1 in MPEC 2012-L03 -- 2012 KM45|
|204||Schiaparelli Obs. in Italy, 1 in MPEC 2012-L03 -- 2012 KM45|
|691||Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-L01 -- 326732|
|291||Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2012-L01 & 2012-L02 -- 2012 KU42, 2012 KN11, 2012 KL45, 2012 KL11, 2012 KK11, 2012 JU11, 2010 OD101|
|I93||St. Pardon de Conques Obs. in France, 1 in MPEC 2012-L03 -- 2012 KM45|
|C44||Volta Obs. in Italy, 1 in MPEC 2012-L03 -- 2012 KM45|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 1 June '12
Notes for Today's Latest Risk Assessments
|2012 KU42||JPL Sentry||1605||2035-2042||2||1.4e-08||-3.53||-3.55||0||JPL: "Analysis based on 45 observations spanning 5.9775 days (2012-May-25.44054 to 2012-May-31.41804)." Diameter approximately 1.400 km. from mean, weighted H=16.9.|
|NEODyS||1605||2035-2089||4||1.55e-08||-3.64||-3.67||0||NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2012-05-25.441 to 2012-05-31.419."|
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 1 June '12
Times are UTC for when items were noted or added by The Tracking News.
|1608||Generated Traffic Report|
|1605||Noted that JPL Sentry has updated its 2012 KU42 risk assessment - see above|
Noted that NEODyS has updated its 2012 KU42 risk assessment - see above
Grabbed MPEC 2012-L01 - Daily Orbit Update - see above
Grabbed MPEC 2012-L02 - 2012 KL45 - see above
Grabbed MPEC 2012-L03 - 2012 KM45 - see above