Comet C/SWAN 2012 was discovered by Ukrainian desktop observer Vladimir Bezugly in March 4th and 6th public imagery from SWAN aboard NASA/ESA's SOHO spacecraft. As Karl Battams explains in his live blog for this object, this is not just the first Kreutz group comet (out of many hundreds) to be detected by SWAN, but also the first to be discovered with that instrument. The above image is from SOHO's LASCO C2 camera at 2136 UT yesterday, and the comet isn't seen in the next C2 images from 0312 and later this morning. Image credit: NASA/ESA/SOHO.
Update: This object, which didn't survive, has been designated C/2012 E2 (SWAN).
Contents on 15 March '12
- Traffic Report -- five objects
- Radar Astrometry -- four objects
- IAU Minor Planet Center
- NEOCP Activity -- 53 listings
- New MPECs -- seven MPECs
- Observers -- 35 observers
- Impact Risk Monitoring -- three objects
- Chronology
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page (archive)
Of 450 risk-listed objects, 32 have had news in the last 31 days. Updated at 1417 UTC on 15 March.
- 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 12 March
- 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 15 March '12
Five objects reported inside ten LD
Five asteroids are reported traveling inside ten lunar distances (LD) of Earth today. Within Earth's Hill sphere, 2012 EN5 comes its closest to Earth on this passage, reaching 1.43 LD at 2104 UTC, and its closest to the Moon: 2.39 LD at 2155 UTC. Further away, risk-listed radar target 2012 DW60 is outbound from 3.90 to 4.93 LD, 2012 EJ5 from 5.75 to 6.09 LD, and radar target 2012 DH54 from 5.95 to 6.86 LD, while newly discovered 2012 EL8 is at about 7.3 LD* from our planet.
Approaching our neighborhood, risk-listed 2012 EK5 arrives inside ten LD on March 19th, risk-listed intruder 2012 EG5 arrives inside ten LD on March 27th, and 2007 HV4 arrives inside ten LD on April 14th.
This report was updated at 2353 UTC with new discovery 2012 EL8 (MPEC) and, earlier, follow-up in today's DOU MPEC for 2012 EN5 and 2012 EM5, plus departed 2012 DA14 and 2012 DU60. This report was previously updated at 1417 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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
Radar Astrometry on 15 March '12
Radar observation of four objects
The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:
Data update noted at 1906 UTC when the database was dated 15 March
- 2012 DH4 from Arecibo (March 11.24 velocity & 12.24 velocity)
Data update noted at 2016 UTC when the database was dated 15 March
- 192642 1999 RD32 from Arecibo (March 6.01 velocity, 6.01 range, 6.00 velocity, 7.02 range, 7.99 velocity & 8.01 range) and Goldstone DSS-14 70m antenna (March 11.99 velocity, 12.03 range & 13.00 range) - see links
Data update noted at 2201 UTC when the database was dated 15 March
- 163295 2002 HW from Arecibo (2005 Dec. 7.86 velocity, 7.87 range & 18.75 velocity)
Data update noted at 2359 UTC when the database was dated 15 March
- 138971 2001 CB21 from Arecibo (2006 Oct. 2.84 velocity & 2.90 range)
NEOCP Activity on 15 March '12
The MPC's NEO Confirmation Page has 53 listings
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 53 objects listed. Of these, 23 were "one nighters." So far The Tracking News has counted a total of 60 listings on the NEOCP today.
New MPECs on 15 March '12
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2012-E60 time-stamped "06:02 UT" - Daily Orbit Update - see below
- MPEC 2012-E61 time-stamped "22:05 UT" - 2012 EP5 - see below
- MPEC 2012-E62 time-stamped "22:07 UT" - 2012 EP5 - see below
- MPEC 2012-E63 time-stamped "22:09 UT" - 2012 EJ8 - see below
- MPEC 2012-E64 time-stamped "22:11 UT" - 2012 EK8 - see below
- MPEC 2012-E65 time-stamped "22:13 UT" - 2012 EL8 - see below
- MPEC 2012-E66 time-stamped "22:15 UT" - 2012 EM8
MPEC 2012-E66 - "22:15 UT" - 2012 EM8
- K12E08M 2012 EM8 (small asteroid, Earth MOID=15.0 LD, i=3.9°, H=24.7 ~39m) from the Catalina Sky Survey (CSS) (March 14.40-43p7), San Marcello Pistoiese Obs. (March 14.93-94p3), Saint-Barthelemy Obs. (March 14.94-95p3), Schiaparelli Obs. (March 14.99-00p3), Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (March 15.20-21p3), Sandlot Obs. (March 15.24-27p3), Astronomical Research Obs. Westfield (March 15.29-30p3), Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (March 15.31-33p5), and Magdalena Ridge Obs. (MRO) (March 15.33-35p4)
MPEC 2012-E65 - "22:13 UT" - 2012 EL8
- K12E08L 2012 EL8 (Earth MOID=7.3 LD, i=4.3°, H=28.3 ~7m, close passer) from the Mt. Lemmon Survey (MLS) (March 14.37-40p4 & 14.49-52p5), Great Shefford Obs. (March 14.93-94p2), San Marcello Pistoiese Obs. (March 14.94-95p3), and MRO (March 15.22-25p4)
MPEC 2012-E64 - "22:11 UT" - 2012 EK8
- K12E08K 2012 EK8 (small asteroid, H=23.4 ~71m) from Pan-STARRS 1 (PS1) (March 14.32-35p3), Eschenberg Obs. (March 14.82-83p4), San Marcello Pistoiese Obs. (March 14.93p3), GiaGa Obs. (March 14.95-96p2), Schiaparelli Obs. (March 14.96-97p3), Valdicerro Obs. (March 14.98-02p3), Nerpio Obs. (March 15.02p3), Volta Obs. (March 15.03-04p4), DGRO-RH (March 15.12-13p3), MRO (March 15.17-20p4), ARO Westfield (March 15.26-27p4), Grasslands Obs. (March 15.37p3), and Moriyama Obs. (March 15.55-56p2)
MPEC 2012-E63 - "22:09 UT" - 2012 EJ8
- K12E08J 2012 EJ8 (small asteroid, H=24.0 ~54m) from MLS (March 14.31-37p7 & 14.50-51p4), ARO Westfield (March 14.38-39p4), MRO (March 14.38-41p4 & 15.18-20p4), San Marcello Pistoiese Obs. (March 14.91-92p3), and Schiaparelli Obs. (March 15.05-09p3)
MPEC 2012-E62 - "22:07 UT" - 2012 EP5
- K12E05P 2012 EP5 (H=21.6 ~162m) from MRO (March 15.12-15p4) and the Spacewatch 1.8m telescope (March 15.38p3)
MPEC 2012-E61 - "22:05 UT" - 2012 EP5
- K12E05P 2012 EP5 (H=21.7 ~155m) from MLS (March 13.21-24p4 & 14.15p3), Spacewatch 1.8m (March 13.26-27p3 & 14.32-33p3), ARO Westfield (March 13.28-30p3), MRO (March 13.30-33p4 & 14.14-16p4), David Tholen's team on Mauna Kea (March 13.56p3), St. Pardon de Conques Obs. (March 13.91-95p3), and Schiaparelli Obs. (March 15.01-03p2)
<< DOU on 15 Mar. '12 >> MPEC 2012-E60 - "06:02 UT" - Daily Orbit Update
- Observations of risk-listed objects
- K12E00C 2012 EC (small asteroid, arc=13 days, H=23.5 ~68m, PMD candidate) from Tholen team/Mauna Kea (March 13.55p2) and ARO Westfield (March 14.21-24p4)
- K12D14A 2012 DA14 (small asteroid, arc=20 days, H=24.4 ~45m, close passer, radar support) from MRO (March 14.36-38p4)
- Observations of recently (no longer) risk-listed objects
- K12E02B 2012 EB2 (small asteroid, arc=11 days, H=24.5 ~43m) from LINEAR (March 14.29-33p4)
- K12D32Z 2012 DZ32 (arc=17 days, H=21.5 ~170m) from ARO Westfield (March 14.42-43p3)
- K12D32Y 2012 DY32 (small asteroid, arc=17 days, H=22.7 ~98m) from ARO Westfield (March 14.18-20p3)
- Observations of close-passing objects
- K12E05N 2012 EN5 (arc=1 day, H=27.2 ~12m, close passer) from Siegen Obs. (March 14.90-91p3)
- K12E05M 2012 EM5 (arc=1 day, H=25.4 ~28m, close passer) from Castelmartini Obs. (March 14.87p3), St. Pardon de Conques Obs. (March 14.87-89p6), Saint-Barthelemy Obs. (March 14.88p3), and Great Shefford Obs. (March 14.90-91p3)
- K12D60U 2012 DU60 (arc=3 days, H=25.4 ~28m, close passer) from Schiaparelli Obs. (March 3.15-16p2)
- Observation campaigns (radar support, potential mission destinations)
- K12B35A 2012 BA35 (arc=49 days, H=23.8 ~59m, PMD candidate) from ARO Westfield (March 14.10-15p3 at V=22.6-8)
- K08J00G 2008 JG (arc=4 opp, H=20.8 ~234m, PMD) from Spacewatch 1.8m (March 15.12-16p3)
- J2642 192642 1999 RD32 (radar) from Castelmartini Obs. (March 13.86p3)
- F3814 153814 2001 WN5 (PMD) from MLS (March 14.35-37p4)
- E1018 141018 2001 WC47 (PMD, radar) from Hamamatsu-Yuto Obs. (March 14.40-45p7) and Atlante Obs. (March 14.89-92p3)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone - Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
- K12E05O 2012 EO5 (arc=1 day, H=23.3 ~74m) from Valdicerro Obs. (March 14.95-96p2) and Schiaparelli Obs. (March 15.02-03p3)
- K12E03O 2012 EO3 (arc=11 days, H=23.0 ~85m) from Holmes/CTIO (March 14.00-01p2) and ARO Westfield (March 14.09-10p3)
- K12D43X 2012 DX43 (arc=16 days, H=23.8 ~59m) from Spacewatch 1.8m (March 14.37p2)
- K12D43V 2012 DV43 (arc=17 days, H=26.5 ~17m) from Spacewatch 1.8m (March 14.51-52p3)
- K12D31L 2012 DL31 (arc=19 days, H=22.8 ~93m) from Spacewatch 1.8m (March 14.44p3)
- K12D30W 2012 DW30 (arc=38 days, H=22.8 ~93m) from Holmes/CTIO (March 13.99p3)
- K12D14N 2012 DN14 (arc=20 days, H=24.8 ~37m) from ARO Westfield (March 14.29-30p4)
- K12D08O 2012 DO8 (arc=22 days, H=22.3 ~117m) from Holmes/CTIO (March 14.27-30p6) and Spacewatch 1.8m (March 14.45p3)
- K12D04K 2012 DK4 (arc=8 days, H=23.6 ~65m) from Schiaparelli Obs. (Feb. 21.95-97p2)
- K12C46O 2012 CO46 (arc=28 days, H=22.7 ~98m) from ARO Westfield (March 14.16-20p3 at V=22.5-7)
- K12C29M 2012 CM29 (arc=30 days, H=22.3 ~117m) from Spacewatch 1.8m (March 14.49-50p3)
- K12B11K 2012 BK11 (arc=55 days, H=22.9 ~89m) from PS1 (March 14.50-51p2)
- K11Y63M 2011 YM63 (arc=74 days, H=22.1 ~129m) from Holmes/CTIO (March 14.33-35p3)
- K12D32V 2012 DV32 (arc=18 days, H=21.9 ~141m) from PS1 (March 14.35-39p3) and Spacewatch 1.8m (March 14.43p3)
- Observations of other asteroidal objects
- K12E05P 2012 EP5 (arc=2 days, H=21.7 ~155m) from MLS (March 13.21-24p4 & 14.15p3), Spacewatch 1.8m (March 13.26-27p3 & 14.32-33p3), ARO Westfield (March 13.28-30p3), MRO (March 13.30-33p4 & 14.14-16p4), Tholen team/Mauna Kea (March 13.56p3), St. Pardon de Conques Obs. (March 13.91-95p3), and Schiaparelli Obs. (March 15.01-03p2)
- K12E05L 2012 EL5 (Q=4.087 AU, arc=2 days, H=19.8 ~371m) from LINEAR (March 14.39-43p3) and San Marcello Pistoiese Obs. (March 14.91p3)
- K12E02A 2012 EA2 (arc=13 days, H=19.3 ~467m) from ARO Westfield (March 14.04-05p3)
- K12D75X 2012 DX75 (arc=15 days, H=20.4 ~282m) from Ka-Dar Obs. TAU Station (March 13.99p3), Castelmartini Obs. (March 14.06-07p3), Holmes/CTIO (March 14.31-33p7), LINEAR (March 14.33-37p5), ARO Westfield (March 14.36-37p5), and DGRO-RH (March 15.17p3)
- K12D61K 2012 DK61 (arc=20 days, H=21.0 ~214m) from CSS (March 14.36-38p4) and Spacewatch 1.8m (March 14.43-44p3)
- K12D61J 2012 DJ61 (i=53.6°, arc=15 days, H=20.0 ~339m) from Spacewatch 1.8m (March 14.26p3)
- K12D61E 2012 DE61 (arc=16 days, H=19.6 ~407m) from Spacewatch 1.8m (March 14.38-39p3)
- K12D54G 2012 DG54 (arc=18 days, H=20.0 ~339m) from Spacewatch 1.8m (March 14.30-32p3)
- K12D04J 2012 DJ4 (arc=24 days, H=20.3 ~295m) from Spacewatch 1.8m (March 14.28-29p3)
- K12D04H 2012 DH4 (arc=26 days, H=20.8 ~234m) from Schiaparelli Obs. (Feb. 23.00-02p3), Castelmartini Obs. (March 14.04-05p3), Atlante Obs. (March 14.97-99p3), and DGRO-RH (March 15.16p6)
- K12D04G 2012 DG4 (Q=5.094 AU, arc=27 days, H=18.1 ~812m) from Spacewatch 1.8m (March 14.35-36p3)
- K12C36P 2012 CP36 (arc=27 days, H=21.6 ~162m) from Schiaparelli Obs. (Feb. 22.02-05p3)
- K12BD4J 2012 BJ134 (q=0.374 AU, Q=4.137 AU, arc=55 days, H=18.3 ~741m) from Hamamatsu-Yuto Obs. (March 14.48-51p9)
- K12B23T 2012 BT23 (arc=55 days, H=19.0 ~537m) from ARO Westfield (March 14.06p3) and DGRO-RH (March 15.14p4)
- K12B23S 2012 BS23 (arc=51 days, H=21.4 ~178m) from Schiaparelli Obs. (Feb. 21.89-92p2)
- K12B20C 2012 BC20 (arc=54 days, H=18.6 ~645m) from Castelmartini Obs. (March 14.09-10p3) and DGRO-RH (March 15.22p3)
- K12A12W 2012 AW12 (i=51.5°, arc=69 days, H=20.2 ~309m) from ARO Westfield (March 14.22-25p3 at V=22.4-7)
- K12A11A 2012 AA11 (arc=60 days, H=19.9 ~355m) from ARO Westfield (March 14.07p4)
- K12A01E 2012 AE1 (arc=73 days, H=19.0 ~537m) from ARO Westfield (March 14.11-14p3)
- K11Y15V 2011 YV15 (Q=4.394 AU, arc=3 opp, H=17.2 ~1.23 km) from Castelmartini Obs. (March 14.03-04p4) and Hamamatsu-Yuto Obs. (March 14.55-62p7)
- K11X01M 2011 XM1 (Q=4.432 AU, arc=101 days, H=20.0 ~339m) from Spacewatch 1.8m (March 14.27-28p3)
- K11S32O 2011 SO32 (arc=174 days, H=21.2 ~195m) from the Spacewatch 0.9m telescope (March 14.29-31p2)
- K11M05D 2011 MD5 (arc=2 opp, H=17.8 ~933m) from Schiaparelli Obs. (Feb. 22.78-81p3)
- K10S03V 2010 SV3 (arc=2 opp, H=20.8 ~234m) from Schiaparelli Obs. (March 3.18-19p5)
- K10OA1N 2010 ON101 (arc=2 opp, H=20.4 ~282m) from Spacewatch 1.8m (March 15.18-20p3)
- K10OA1D 2010 OD101 (arc=2 opp, H=20.8 ~234m) from Spacewatch 1.8m (March 14.41-42p3)
- K10L34L 2010 LL34 (arc=3 opp, H=19.4 ~446m) from Spacewatch 1.8m (March 15.10-11p3)
- K10L33R 2010 LR33 (arc=3 opp, H=18.2 ~776m) from Spacewatch 1.8m (March 14.39-40p3)
- K10L14N 2010 LN14 (arc=3 opp, H=21.1 ~204m) from Spacewatch 1.8m (March 14.23-24p2)
- K09Q08E 2009 QE8 (arc=3 opp, H=18.0 ~851m) from CSS (March 14.28-29p3) and Mirasteilas Obs. (March 15.00-01p3)
- K08Q03T 2008 QT3 (arc=2 opp, H=18.8 ~589m) from PS1 (March 14.49-51p2)
- K08E00R 2008 ER (arc=2 opp, H=21.3 ~186m) from MLS (March 14.23-26p4)
- K04Q07J 2004 QJ7 (arc=3 opp, H=18.5 ~676m) from Argelander Institute for Astronomy Obs. (March 14.92p6) and Mirasteilas Obs. (March 15.03-04p3)
- K04M00D 2004 MD (arc=3 opp, H=20.1 ~323m) from Schiaparelli Obs. (Feb. 22.96-98p3)
- K04J00A 2004 JA (arc=5 opp, H=17.9 ~891m) from Holmes/CTIO (March 14.40-41p2)
- K02E06M 2002 EM6 (arc=3 opp, H=20.1 ~323m) from Eschenberg Obs. (March 14.77-78p3) and Mirasteilas Obs. (March 14.94-96p3)
- K02E01H 2002 EH1 (arc=2 opp, H=19.6 ~407m) from MLS (March 14.20-22p4)
- K02C01M 2002 CM1 (i=45.0°, arc=5 opp, H=16.9 ~1.41 km) from Schiaparelli Obs. (Feb. 21.81-82p2)
- K01F07A 2001 FA7 (arc=6 opp, H=16.8 ~1.48 km) from Schiaparelli Obs. (Feb. 21.78-79p2)
- K00D08K 2000 DK8 (Q=4.270 AU, arc=4 opp, H=19.3 ~467m) from Schiaparelli Obs. (Feb. 21.84-86p2)
- J98K03N 1998 KN3 (q=0.195 AU, arc=3 opp, H=18.4 ~708m) from CSS (March 14.42-44p4) and Mirasteilas Obs. (March 14.93-94p3)
- J98F14F 1998 FF14 (i=38.7°, arc=4 opp, H=20.6 ~257m) from PS1 (March 14.32-35p3)
- J95D01W 1995 DW1 (arc=3 opp, H=21.1 ~204m) from CSS (March 14.40-41p4)
- J94N00K 1994 NK (arc=2 opp, H=19.8 ~371m) from Mirasteilas Obs. (March 15.04-05p3)
- W0378 320378 2007 UR3 from Spacewatch 0.9m (March 14.22-26p3)
- V2942 312942 1995 EK1 from Castelmartini Obs. (March 13.99-00p3)
- R5558 275558 1999 RH33 from Castelmartini Obs. (March 13.99p3) and CSS (March 14.23-25p4)
- Q7221 267221 2001 AD2 from Castelmartini Obs. (March 14.03p3) and CSS (March 14.42-44p4)
- Q3976 263976 2009 KD5 from Castelmartini Obs. (March 13.96p3)
- I9008 189008 1996 FR3 from MLS (March 14.46-48p4)
- F4589 154589 2003 MX2 from MLS (March 14.23-26p4)
- E3651 143651 2003 QO104 from Bigmuskie Obs. (March 14.79-81p3)
- D8524 138524 2000 OJ8 from CSS (March 14.16-17p4)
- 53319 53319 1999 JM8 from MLS (March 14.23-26p4)
- 32906 32906 1994 RH from Les Engarouines Obs. (March 13.80-84p3) and LINEAR (March 14.22-26p5)
- 21277 21277 1996 TO5 from Spacewatch 1.8m (March 14.32-33p3)
- 07977 7977 1977 QQ5 from PS1 (March 14.36-40p4)
- 06053 6053 1993 BW3 from PS1 (March 13.40-41p2)
- 06050 6050 Miwablock (1992 AE) from LINEAR (March 14.22-27p5)
- 05587 5587 1990 SB from CSS (March 14.33-35p4)
- 05324 5324 Lyapunov (1987 SL) from CSS (March 14.33-35p4)
- 04055 4055 Magellan (1985 DO2) from CSS (March 14.26-27p4)
Observers on 15 March '12
A total of 35 observers appear in today's MPECs.
| Code | Observer / observatory |
|---|---|
| 251 | Arecibo in Puerto Rico, 4 in radar -- 2012 DH4, 192642, 163295, 138971 |
| C60 | Argelander Institute for Astronomy Obs. in Germany, 1 in MPEC 2012-E60 -- 2004 QJ7 |
| H21 | Astronomical Research Obs. Westfield in Illinois, 17 in MPECs 2012-E60, 2012-E61, 2012-E63, 2012-E64 & 2012-E66 -- 2012 EP5, 2012 EO3, 2012 EM8, 2012 EK8, 2012 EJ8, 2012 EC, 2012 EA2, 2012 DZ32, 2012 DY32, 2012 DX75, 2012 DN14, 2012 CO46, 2012 BT23, 2012 BA35, 2012 AW12, 2012 AE1, 2012 AA11 |
| J51 | Atlante Obs. in the Canary Islands, 2 in MPEC 2012-E60 -- 2012 DH4, 141018 |
| B88 | Bigmuskie Obs. in Italy, 1 in MPEC 2012-E60 -- 143651 |
| 160 | Castelmartini Obs. in Italy, 10 in MPEC 2012-E60 -- 2012 EM5, 2012 DX75, 2012 DH4, 2012 BC20, 2011 YV15, 312942, 275558, 267221, 263976, 192642 |
| 703 | Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2012-E60 & 2012-E66 -- 2012 EM8, 2012 DK61, 2009 QE8, 1998 KN3, 1995 DW1, 275558, 267221, 138524, 5587, 5324, 4055 |
| 807| | Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPECs 2012-E60 & 2012-E66 -- 2012 EO3, 2012 EM8, 2012 DX75, 2012 DW30, 2012 DO8, 2011 YM63, 2004 JA |
| G48 | Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 6 in MPECs 2012-E60, 2012-E64 & 2012-E66 -- 2012 EM8, 2012 EK8, 2012 DX75, 2012 DH4, 2012 BT23, 2012 BC20 |
| 151 | Eschenberg Obs. in Switzerland, 2 in MPECs 2012-E60 & 2012-E64 -- 2012 EK8, 2002 EM6 |
| 203 | GiaGa Obs. in Italy, 1 in MPEC 2012-E64 -- 2012 EK8 |
| 253 | Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 192642 |
| 651 | Grasslands Obs. in Arizona, 1 in MPEC 2012-E64 -- 2012 EK8 |
| J95 | Great Shefford Obs. in England, 2 in MPECs 2012-E60 & 2012-E65 -- 2012 EM5, 2012 EL8 |
| 379 | Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2012-E60 -- 2012 BJ134, 2011 YV15, 141018 |
| C32 | Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-E60 -- 2012 DX75 |
| 704 | LINEAR in New Mexico, 5 in MPEC 2012-E60 -- 2012 EL5, 2012 EB2, 2012 DX75, 32906, 6050 |
| A14 | Les Engarouines Obs. in France, 1 in MPEC 2012-E60 -- 32906 |
| H01 | Magdalena Ridge Obs. (MRO) in New Mexico, 6 in MPECs 2012-E60, 2012-E61, 2012-E62, 2012-E63, 2012-E64, 2012-E65 & 2012-E66 -- 2012 EP5, 2012 EM8, 2012 EL8, 2012 EK8, 2012 EJ8, 2012 DA14 |
| 5682 | David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2012-E60 & 2012-E61 -- 2012 EP5, 2012 EC |
| B67 | Mirasteilas Obs. in Switzerland, 5 in MPEC 2012-E60 -- 2009 QE8, 2004 QJ7, 2002 EM6, 1998 KN3, 1994 NK |
| 900 | Moriyama Obs. in Japan, 1 in MPEC 2012-E64 -- 2012 EK8 |
| G96 | Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2012-E60, 2012-E61, 2012-E63 & 2012-E65 -- 2012 EP5, 2012 EL8, 2012 EJ8, 2008 ER, 2002 EH1, 53319, 189008, 154589, 153814 |
| I89 | Nerpio Obs. in Italy, 1 in MPEC 2012-E64 -- 2012 EK8 |
| F51 | Pan-STARRS 1 (PS1) in Hawaii, 7 in MPECs 2012-E60 & 2012-E64 -- 2012 EK8, 2012 DV32, 2012 BK11, 2008 QT3, 1998 FF14, 7977, 6053 |
| B04 | Saint-Barthelemy Obs. in Italy, 2 in MPECs 2012-E60 & 2012-E66 -- 2012 EM8, 2012 EM5 |
| 104 | San Marcello Pistoiese Obs. in Italy, 5 in MPECs 2012-E60, 2012-E63, 2012-E64, 2012-E65 & 2012-E66 -- 2012 EM8, 2012 EL8, 2012 EL5, 2012 EK8, 2012 EJ8 |
| H36 | Sandlot Obs. in Kansas, 1 in MPEC 2012-E66 -- 2012 EM8 |
| 204 | Schiaparelli Obs. in Italy, 16 in MPECs 2012-E60, 2012-E61, 2012-E63, 2012-E64 & 2012-E66 -- 2012 EP5, 2012 EO5, 2012 EM8, 2012 EK8, 2012 EJ8, 2012 DU60, 2012 DK4, 2012 DH4, 2012 CP36, 2012 BS23, 2011 MD5, 2010 SV3, 2004 MD, 2002 CM1, 2001 FA7, 2000 DK8 |
| 510 | Siegen Obs. in Germany, 1 in MPEC 2012-E60 -- 2012 EN5 |
| 691 | Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-E60 -- 2011 SO32, 320378 |
| 291 | Spacewatch 1.8m telescope in Arizona, 21 in MPECs 2012-E60, 2012-E61 & 2012-E62 -- 2012 EP5, 2012 DX43, 2012 DV43, 2012 DV32, 2012 DO8, 2012 DL31, 2012 DK61, 2012 DJ61, 2012 DJ4, 2012 DG54, 2012 DG4, 2012 DE61, 2012 CM29, 2011 XM1, 2010 ON101, 2010 OD101, 2010 LR33, 2010 LN14, 2010 LL34, 2008 JG, 21277 |
| I93 | St. Pardon de Conques Obs. in France, 2 in MPECs 2012-E60 & 2012-E61 -- 2012 EP5, 2012 EM5 |
| C92 | Valdicerro Obs. in Italy, 2 in MPECs 2012-E60 & 2012-E64 -- 2012 EO5, 2012 EK8 |
| C44 | Volta Obs. in Italy, 1 in MPEC 2012-E64 -- 2012 EK8 |
| For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page. | |
Impact Risk Monitoring on 15 March '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 EC | JPL Sentry | 1415 | 2068-2107 | 18 | 3.4e-06 | -5.20 | -5.47 | 0 | JPL: "Analysis based on 60 observations spanning 12.894 days (2012-Mar-01.3419 to 2012-Mar-14.23632)." Diameter approximately 0.066 km. from mean, weighted H=23.5. |
| NEODyS | 1415 | 2049-2090 | 5 | 2.96e-06 | -5.21 | -5.34 | 0 | NEODyS: "Based on 60 optical observations (of which 0 are rejected as outliers) from 2012-03-01.343 to 2012-03-14.237." | |
| 2012 DA14 | JPL Sentry | 1415 | 2020-2044 | 35 | 7.9e-05 | -3.51 | -3.95 | 0 | JPL: "Analysis based on 136 observations spanning 20.350 days (2012-Feb-23.03431 to 2012-Mar-14.38455)." Diameter approximately 0.044 km. from mean, weighted H=24.4. |
| NEODyS | 1415 | 2020-2089 | 295 | 3.6e-04 | -3.15 | -3.85 | 0 | NEODyS: "Based on 139 optical observations (of which 4 are rejected as outliers) from 2012-02-23.029 to 2012-03-14.385." | |
| 2010 HP20 | NEODyS | 1415 | 2021-2089 | 163 | 1.99e-05 | -6.23 | -7.34 | 0 | NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2010-04-20.449 to 2010-04-20.497." |
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 15 March '12
Times are UTC for when items were noted or added by The Tracking News.
| 2359 | Noted Radar Astrometry database update - see above |
| 2353 | Updated Traffic Report |
| 2245 | Grabbed MPEC 2012-E61 - 2012 EP5 - see above Grabbed MPEC 2012-E62 - 2012 EP5 - see above Grabbed MPEC 2012-E63 - 2012 EJ8 - see above Grabbed MPEC 2012-E64 - 2012 EK8 - see above Grabbed MPEC 2012-E65 - 2012 EL8 - see above Grabbed MPEC 2012-E66 - 2012 EM8 - see above |
| 2201 | Noted Radar Astrometry database update - see above |
| 2016 | Noted Radar Astrometry database update - see above |
| 1906 | Noted Radar Astrometry database update - see above |
| 1415 | Noted that NEODyS has updated its 2010 HP20 risk assessment - see above Noted that JPL Sentry has updated its 2012 DA14 risk assessment - see above Noted that NEODyS has updated its 2012 DA14 risk assessment - see above Noted that JPL Sentry has updated its 2012 EC risk assessment - see above Noted that NEODyS has updated its 2012 EC risk assessment - see above Grabbed MPEC 2012-E60 - Daily Orbit Update - see above |
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