Contents on 3 June '12
- Traffic Report -- three objects
- IAU Minor Planet Center
- NEOCP Activity -- five listings
- New MPECs -- one MPEC
- Observers -- five observers
- Impact Risk Monitoring -- one object
- Chronology
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 449 risk-listed objects, 21 have had news in the last 31 days. Updated at 1553 UTC on 3 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
The latest A/CC news is available via framed access, 
RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.
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 3 June '12
Three objects reported inside ten LD
Three visitors are reported traveling within ten lunar distances (LD) of our planet today, all of them outbound. 2012 LA moves from 7.9 to 8.0 LD*, 2012 KC45 from 8.49 to 9.84 LD, and 2012 KT12 from 8.51 to 9.31 LD.
No other objects are known to approach ten LD until November.
This report was generated at 1557 UTC with follow-up in today's DOU MPEC for 2012 LA, 2012 KT42, and 2012 KZ41.
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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
NEOCP Activity on 3 June '12
The MPC's NEO Confirmation Page has 5 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, three were "one nighters."
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 3 June '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.
<< DOU on 3 June '12 >> MPEC 2012-L09 - "06:03 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K12K42U 2012 KU42 (arc=8 days, H=17.2 ~1.23 km) from Schiaparelli Obs. (May 29.06-08p3) and Astronomical Research Obs. Westfield (June 2.32-33p3)
- Observations of recently (no longer) risk-listed objects
- K12K42T 2012 KT42 (small asteroid, arc=1 day, H=29.0 ~5m, close passer) from Schiaparelli Obs. (May 28.95p5)
- K12K18N 2012 KN18 (small asteroid, Q=4.368 AU, arc=11 days, H=24.6 ~41m) from ARO Westfield (June 2.26-27p3)
- K12J17R 2012 JR17 (Q=4.151 AU, arc=19 days, H=17.7 ~977m) from ARO Westfield (June 2.38-39p3)
- Observations of close-passing objects
- K12L00A 2012 LA (arc=1 day, H=27.4 ~11m, PMD candidate) from ARO Westfield (June 2.20-21p3)
- K12K41Z 2012 KZ41 (arc=7 days, H=25.0 ~34m) from Schiaparelli Obs. (May 28.96-97p3) and ARO Westfield (May 31.33p3 & June 2.37-38p7)
- Observation campaigns (radar support, potential mission destinations)
- G2173 162173 1999 JU3 (PMD) from Schiaparelli Obs. (May 29.00-02p3)
-- Potential mission destinations list & ephemerides + NHATS - Observations of small asteroids (H>22.0)
- K12K18O 2012 KO18 (arc=9 days, H=22.1 ~129m) from Schiaparelli Obs. (May 28.92-94p3)
- K12K11K 2012 KK11 (arc=12 days, H=25.2 ~31m) from ARO Westfield (May 30.29-30p3)
- K12K00X 2012 KX (arc=17 days, H=23.4 ~71m) from ARO Westfield (June 2.31-33p6)
- Observations of other asteroidal objects
- K12K47F 2012 KF47 (arc=2 days, H=20.7 ~245m) from ARO Westfield (June 2.22-23p3)
- K12K06C 2012 KC6 (arc=15 days, H=21.7 ~155m) from David Tholen's team on Mauna Kea (May 22.55p3), ARO Westfield (June 2.24-25p3), and the Mt. Lemmon Survey (MLS) (June 2.26-27p4)
- K12J16B 2012 JB16 (arc=19 days, H=19.7 ~389m) from ARO Westfield (June 2.18-20p4)
- K11Y62U 2011 YU62 (Q=4.768 AU, arc=156 days, H=17.6 ~1.02 km) from ARO Westfield (June 2.31-32p3)
- K09K22J 2009 KJ22 (arc=2 opp, H=20.0 ~339m) from Schiaparelli Obs. (May 28.98-99p3)
- K06V13Y 2006 VY13 (Q=4.718 AU, arc=2 opp, H=17.2 ~1.23 km) from ARO Westfield (June 2.20-21p3)
- K01W01N 2001 WN1 (arc=4 opp, H=19.4 ~446m) from ARO Westfield (June 2.33-35p3)
- E2781 142781 2002 UM11 from ARO Westfield (June 2.27-28p3)
- D8937 138937 2001 BK16 from ARO Westfield (June 2.12-14p3)
- 08035 8035 1992 TB from LINEAR (June 1.38-41p4)
Observers on 3 June '12
Five observers appear in today's MPEC.
| Code | Observer / observatory |
|---|---|
| H21 | Astronomical Research Obs. Westfield in Illinois, 15 in MPEC 2012-L09 -- 2012 LA, 2012 KZ41, 2012 KX, 2012 KU42, 2012 KN18, 2012 KK11, 2012 KF47, 2012 KC6, 2012 JR17, 2012 JB16, 2011 YU62, 2006 VY13, 2001 WN1, 142781, 138937 |
| 704 | LINEAR in New Mexico, 1 in MPEC 2012-L09 -- 8035 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-L09 -- 2012 KC6 |
| G96 | Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-L09 -- 2012 KC6 |
| 204 | Schiaparelli Obs. in Italy, 6 in MPEC 2012-L09 -- 2012 KZ41, 2012 KU42, 2012 KT42, 2012 KO18, 2009 KJ22, 162173 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 3 June '12
| 0000NNN000 Object | Risk Monitor | When Noted UTC | 0000T0000 Year Range | VI # | 000NN00 Prob Cum | T0000 PS Cum | T0000 PS Max | T S | Notes for Today's Latest Risk Assessments |
| 2012 KU42 | JPL Sentry | 1552 | 2035-2078 | 3 | 2.0e-08 | -3.40 | -3.41 | 0 | JPL: "Analysis based on 51 observations spanning 7.8850 days (2012-May-25.44054 to 2012-Jun-02.32556)." Diameter approximately 1.400 km. from mean, weighted H=16.9. |
| NEODyS | 1552 | 2035-2078 | 2 | 1.7e-08 | -3.58 | -3.58 | 0 | NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2012-05-25.441 to 2012-06-02.326." | |
Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale
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 3 June '12
Times are UTC for when items were noted or added by The Tracking News.
| 1557 | Generated Traffic Report |
| 1552 | 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-L09 - Daily Orbit Update - see above |
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