Contents on 6 July '12
- Traffic Report -- one object
- IAU Minor Planet Center
- Observers -- fifteen observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 445 risk-listed objects, 58 have had news in the last 31 days. Updated at 1538 UTC on 6 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 6 July '12
One object reported inside ten LD
There is one object reported flying within ten lunar distances (LD) of Earth today. Radar target 2012 MY2 is outbound from 5.15 to 5.94 LD. No other objects are known to come inside ten LD until November.
This report was generated at 1539 UTC. Observation of intruder 2011 PU1 from last August is reported in today's DOU MPEC.
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 6 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 6 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 risk-listed objects
- K11P01U 2011 PU1 (small asteroid, arc=45 days, H=25.0 ~34m, close passer, PMD) from Schwarzschild Obs. (2011 Aug. 8.07-08p2)
- Observation campaigns (radar support, potential mission destinations)
- K12E00C 2012 EC (arc=120 days, H=23.4 ~71m, PMD candidate) from David Tholen's team on Mauna Kea (June 29.29-30p2 at R=22.3-4)
- F3958 153958 2002 AM31 (radar) from Walnut Creek Obs. (July 5.25-27p3)
-- Potential mission destinations list & ephemerides + NHATS -- Planetary radar schedules: Arecibo & Goldstone
- Observations of almost-small asteroids (21.7<H<=22.0)
- K11P00X 2011 PX (arc=60 days, H=21.8 ~148m) from Schwarzschild Obs. (2011 Aug. 4.96-97p2)
- Observations of other asteroidal objects
- K12M04S 2012 MS4 (i=67.7°, arc=16 days, H=18.6 ~645m) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (July 5.13-14p5)
- K12L11G 2012 LG11 (i=37.0°, arc=21 days, H=19.2 ~490m) from St. Pardon de Conques Obs. (July 5.97-00p3)
- K12L11E 2012 LE11 (Q=4.485 AU, arc=21 days, H=17.9 ~891m) from Castelmartini Obs. (July 4.96-97p3)
- K12L07U 2012 LU7 (arc=23 days, H=19.0 ~537m) from Holmes/CTIO (July 5.19-20p5), Madonna di Dossobuono Obs. (July 5.91p3), and Tesla Obs. (July 5.91-92p2 & 5.98-99p5)
- K12K45M 2012 KM45 (arc=25 days, H=18.8 ~589m) from Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (June 7.19p4)
- K12J17R 2012 JR17 (Q=4.121 AU, arc=52 days, H=17.8 ~933m) from Holmes/CTIO (July 5.36-37p5)
- K12H31G 2012 HG31 (arc=81 days, H=18.9 ~562m) from Castelmartini Obs. (July 5.85p3) and Santa Mama Obs. (July 5.86-88p4)
- K11O05Q 2011 OQ5 (arc=157 days, H=19.5 ~426m) from Schwarzschild Obs. (2011 July 27.97-98p5)
- K11O04V 2011 OV4 (arc=140 days, H=18.6 ~645m) from Schwarzschild Obs. (2011 July 26.02-03p5)
- X1471 331471 1984 QY1 from Santa Mama Obs. (July 5.84-85p4) and Blanquita Obs. (July 5.88p3)
- V7685 317685 2003 NO4 from Castelmartini Obs. (July 4.97p3)
- R7810 277810 2006 FV35 from the Sloan Digital Sky Survey (SDSS) (2005 May 10.21-22p2)
- H3561 173561 2000 YV137 from the Catalina Sky Survey (CSS) (June 22.27-30p4)
- G2980 162980 2001 RR17 from Santa Mama Obs. (July 5.89-90p3)
- F9504 159504 2000 WO67 from the Mt. Lemmon Survey (MLS) (2011 April 12.37-39p4)
- F2941 152941 2000 FM10 from MLS (2011 April 12.35-37p4)
- 68348 68348 2001 LO7 from Edney House Obs. (2011 July 14.96-97p3 & 2011 July 15.04-05p2)
- 55408 55408 2001 TC2 from SDSS (2009 Oct. 15.26-27p4)
- 05587 5587 1990 SB from Santa Mama Obs. (July 5.83-84p4)
Observers on 6 July '12
Fifteen observers appear in today's MPEC.
|Code||Observer / observatory|
|I99||Blanquita Obs. in Spain, 1 in MPEC 2012-N07 -- 331471|
|160||Castelmartini Obs. in Italy, 3 in MPEC 2012-N07 -- 2012 LE11, 2012 HG31, 317685|
|703||Catalina Sky Survey in Arizona, 1 in MPEC 2012-N07 -- 173561|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2012-N07 -- 2012 MS4, 2012 LU7, 2012 JR17|
|G48||Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-N07 -- 2012 KM45|
|I70||Edney House Obs., 1 in MPEC 2012-N07 -- 68348|
|560||Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2012-N07 -- 2012 LU7|
|5682||David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-N07 -- 2012 EC|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2012-N07 -- 159504, 152941|
|B38||Santa Mama Obs. in Italy, 4 in MPEC 2012-N07 -- 2012 HG31, 331471, 162980, 5587|
|033||Schwarzschild Obs. in Germany, 4 in MPEC 2012-N07 -- 2011 PX, 2011 PU1, 2011 OV4, 2011 OQ5|
|645||Sloan Digital Sky Survey (SDSS) in New Mexico, 2 in MPEC 2012-N07 -- 55408, 277810|
|I93||St. Pardon de Conques Obs. in France, 1 in MPEC 2012-N07 -- 2012 LG11|
|I76||Tesla Obs., 1 in MPEC 2012-N07 -- 2012 LU7|
|G56||Walnut Creek Obs. in northern California, 1 in MPEC 2012-N07 -- 153958|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 6 July '12
Notes for Today's Latest Risk Assessments
|2011 PU1||JPL Sentry||1537||2063-2106||16||1.7e-04||-4.13||-4.47||0||JPL: "Analysis based on 57 observations spanning 45.352 days (2011-Aug-06.9677 to 2011-Sep-21.319885)." Diameter approximately 0.032 km. from mean, weighted H=25.1.|
|NEODyS||1537||2081-2090||4||1.71e-04||-4.16||-4.29||0||NEODyS: "Based on 57 optical observations (of which 1 are rejected as outliers) from 2011-08-06.968 to 2011-09-21.321."|
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 6 July '12
Times are UTC for when items were noted or added by The Tracking News.
|1539||Generated Traffic Report|
|1537||Noted that JPL Sentry has updated its 2011 PU1 risk assessment - see above|
Noted that NEODyS has updated its 2011 PU1 risk assessment - see above
Grabbed MPEC 2012-N07 - Daily Orbit Update - see above