Contents on 2 July '12
- Traffic Report -- one object
- Radar Astrometry -- two objects
- IAU Minor Planet Center
- Observers -- six observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 445 risk-listed objects, 12 have had news in the last 31 days. Updated at 2209 UTC on 2 July.
- 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 27 June
- 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 2 July '12
One object reported inside ten LD
There is one object reported to be inside ten lunar distances (LD) of Earth today. Within Earth's Hill sphere, radar target 2012 MY2 is outbound from 2.16 to 2.85 LD. No other objects are known to come to within ten LD of our planet until November.
This report was updated at 2225 UTC with follow-up in radar for 2012 MY2. Today's first traffic report was generated at 1505 UTC.
Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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.
Radar Astrometry on 2 July '12
Radar observation of two objects
Data update noted at 2112 UTC when the database was dated 2 July
- 2012 MY2 from Goldstone DSS-14 70m antenna transmit with Goldstone DSS-13 34m antenna receive (July 1.55 velocity & 1.56 velocity) - see links
Data update noted at 2359 UTC when the database was dated 2 July
NEOCP Activity on 2 July '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 on June 30th.
New MPECs on 2 July '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 recently (no longer) risk-listed objects
- K12L09K 2012 LK9 (Q=4.071 AU, arc=17 days, H=17.9 ~891m) from David Tholen's team on Mauna Kea (June 29.38-39p3)
- Observations of small asteroids (H>22.0)
- K12L07W 2012 LW7 (arc=17 days, H=23.3 ~74m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (July 1.15-16p2)
- Observations of other asteroidal objects
- K12M11M 2012 MM11 (arc=8 days, H=20.3 ~295m) from Holmes/CTIO (July 1.18-19p6) and St. Pardon de Conques Obs. (July 2.01-05p4)
- K12M07C 2012 MC7 (arc=10 days, H=20.1 ~323m) from St. Pardon de Conques Obs. (July 1.93-96p3)
- K12M06L 2012 ML6 (arc=10 days, H=20.2 ~309m) from Holmes/CTIO (July 1.27-28p3)
- K12M02N 2012 MN2 (arc=15 days, H=20.4 ~282m) from Holmes/CTIO (July 1.29-30p3)
- K12M00P 2012 MP (arc=15 days, H=21.0 ~214m) from Holmes/CTIO (July 1.29-30p3)
- K12K18L 2012 KL18 (arc=42 days, H=18.9 ~562m) from Holmes/CTIO (July 1.32-33p3)
Observers on 2 July '12
Six observers appear in today's MPEC.
|Code||Observer / observatory|
|251||Arecibo in Puerto Rico, 1 in radar -- 308242|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2012-N03 -- 2012 MP, 2012 MN2, 2012 MM11, 2012 ML6, 2012 LW7, 2012 KL18|
|252||Goldstone DSS-13 34m antenna in southern California, 1 in radar -- 2012 MY2|
|253||Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2012 MY2|
|5682||David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-N03 -- 2012 LK9|
|I93||St. Pardon de Conques Obs. in France, 2 in MPEC 2012-N03 -- 2012 MM11, 2012 MC7|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 2 July '12
Notes for Today's Latest Risk Assessments
|2012 MY2||JPL Sentry||2209||R E M O V E D||JPL: Risk listing removed at 2152 UTC.|
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 2 July '12
Times are UTC for when items were noted or added by The Tracking News.
|2359||Noted Radar Astrometry database update - see above|
|2225||Updated Traffic Report|
|2209||Noted that JPL Sentry has removed 2012 MY2 as an impact risk - see above|
|2112||Noted Radar Astrometry database update - see above|
|1502||Grabbed MPEC 2012-N03 - Daily Orbit Update - see above|