2012-03-02 Tracking News

Contents on 2 March '12

Traffic Report -- seven objects
Radar Astrometry -- two objects
IAU Minor Planet Center
- NEOCP Activity -- ten listings
- New MPECs -- six MPECs
Observers -- 60 observers
Impact Risk Monitoring -- seven objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page (archive)
Of 449 risk-listed objects, 34 have had news in the last 31 days. Updated at 2317 UTC on 2 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 14 Feb.
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 2 March '12

Seven objects reported inside ten LD

Seven visitors are reported moving inside ten lunar distances (LD) of our planet today. 2012 EA flies from 3.09 to 2.67 LD within Earth's Hill sphere, which 2012 DS32 exits. Further away, 2012 DN31 is heading out from 8.02 to 8.24 LD, risk-listed 2012 CS46 is calculated with great uncertainty to leave ten LD, 2012 DH54 travels from 9.7 to 8.7 LD*, 2012 DR32 comes its closest to Earth this time around, reaching 8.68 LD at 1649 UTC, and 2012 DU60 moves from 9.5 to 9.2 LD*.

Coming our way, risk-listed 2012 DW60 arrives inside ten LD on March 4th, the day that 2008 EJ85 is calculated with some uncertainty to return, and 2007 HV4 comes inside on April 14th.

This report was updated at 1926 UTC to note that we missed 2012 DW43, which may have been just inside ten LD during 15-19 February and has only been reported observed in MPEC 2012-D96 of the 28th. Previously today we noted follow-up in today's DOU MPEC for 2012 EA, 2012 DJ54, 2012 DN31, and 2012 DA14, along with follow-up for departed 2011 CP4 in radar, with updates at 0028, 0626, and 1702 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. Distances are interpreted by A/CC from JPL Horizons data. "LD*" indicates some passage uncertainty. See also today's timeline, current sky chart and object details (alt-details), and ephemerides.

Radar Astrometry on 2 March '12

Radar observation of two 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 0107 UTC when the database was dated 1 March

2011 CP4 (close passer) from Arecibo (Feb. 22.33 velocity, 26.67 velocity, 26.69 range & 27.72 velocity) and Goldstone DSS-14 70m antenna (Feb. 22.49 velocity, 22.51 range, 23.49 velocity, 24.59 velocity & 24.61 range) - see links

Data update noted at 0248 UTC when the database was dated 1 March

2002 QC7 from Arecibo (Feb. 25.75 velocity, 25.78 velocity, 25.78 range, 26.85 velocity & 26.85 range)

NEOCP Activity on 2 March '12

The MPC's NEO Confirmation Page has 10 listings

When last checked at 2316 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had ten objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of nineteen listings on the NEOCP today.

New MPECs on 2 March '12

Minor Planet Electronic Circulars

As of last check at 2316 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-E13 time-stamped "00:26 UT" - 2012 EB - see below
MPEC 2012-E14 time-stamped "02:01 UT" - Comet C/2012 BJ98 - see below
MPEC 2012-E15 time-stamped "02:56 UT" - 2012 DK61 - see below
MPEC 2012-E16 time-stamped "06:04 UT" - Daily Orbit Update - see below
MPEC 2012-E17 time-stamped "20:17 UT" - 2012 EC - see below
MPEC 2012-E18 time-stamped "23:05 UT" - Observations and Orbits of Comets

<< OOC on 2 Mar. '12 >> MPEC 2012-E18 - "23:05 UT" - Observations and Orbits of Comets

CK12C17H C/2012 CH17 (MOSS) (i=27.7°, q=1.296 AU, TP=2012 Sept. 28.14710 TT) from Kurihara Obs. (Feb. 21.48p3), Sant Celoni Obs. (Feb. 21.88-91p3 & 26.87-89p3), Schiaparelli Obs. (Feb. 22.17-18p3), Stixendorf Obs. (Feb. 22.86-88p4), Vallauris Obs. (Feb. 23.97-00p3), Montcabre Obs. (Feb. 24.92-93p3 & March 1.93-95p3), Betelgeuse Station (Feb. 24.93p3), Haute Provence Obs. (Feb. 24.96-99p3), the Catalina Sky Survey (CSS) (Feb. 25.42-43p4 & March 2.28-31p4), Olmen Obs. (Feb. 26.91-93p3), La Vara Obs. (Feb. 26.95-96p3 & 27.95-96p3), Moriyama Obs. (Feb. 29.68p2), Montevenere Obs. (Feb. 29.96-98p3), and Petit Jean Mtn. South Obs. (PJMSO) (March 1.26-28p6)
CK12C020 C/2012 C2 (Bruenjes) (i=162.8°, q=0.801 AU, TP=2012 Mar. 12.73383 TT) from Schiaparelli Obs. (Feb. 15.77-78p2 & 21.79-80p2), Kurihara Obs. (Feb. 19.44-45p2, 20.43-44p3, 21.45-46p2 & 22.43p2), Stixendorf Obs. (Feb. 20.78-79p2), and Lumezzane Obs. (Feb. 21.79-80p2)
CK12B98J C/2012 BJ98 (Centaur, q=2.157 AU, Q=31.995 AU, TP=2012 Sept. 20.57288 TT) from the Mt. Lemmon Survey (MLS) (Feb. 24.16-18p4) and Schiaparelli Obs. (March 1.93p1, 1.98p1 & 2.09p1)
CK12B030 C/2012 B3 (La Sagra) (i=106.9°, q=3.536 AU, TP=2011 Dec. 6.84287 TT) from LINEAR (Feb. 26.46-50p5 & 27.48-52p3) and Modra Obs. (Feb. 27.17-18p3)
PK12B010 P/2012 B1 (Panstarrs) (q=3.826 AU, Q=9.155 AU, TP=2013 July 23.23757 TT) from Lumezzane Obs. (Feb. 21.97p4), Schiaparelli Obs. (Feb. 22.06-07p2), Montcabre Obs. (Feb. 24.85-88p3 & March 1.84-89p3), PJMSO (Feb. 26.26-27p4), La Vara Obs. (Feb. 26.91-92p3 & 27.90-92p3), and Haute Provence Obs. (Feb. 28.89-92p3)
CK12A020 C/2012 A2 (LINEAR) (i=125.9°, q=3.537 AU, Q=1910.278 AU, TP=2012 Nov. 5.09388 TT) from Stixendorf Obs. (Feb. 22.84-86p5), Betelgeuse Sta. (Feb. 24.94p3), Montcabre Obs. (Feb. 24.95-96p3), Haute Provence Obs. (Feb. 29.08-10p3), Moriyama Obs. (Feb. 29.56-57p2), and Rouet Obs. (March 1.91-93p4)
CK12A010 C/2012 A1 (Panstarrs) (i=120.9°, q=7.593 AU, TP=2013 Dec. 3.84380 TT) from Lumezzane Obs. (Feb. 21.92-93p3)
PK11V05J P/2011 VJ5 (Lemmon) (q=1.506 AU, Q=5.298 AU, TP=2011 Dec. 8.70419 TT) from Pan-STARRS 1 (PS1) (Feb. 28.52-56p3)
CK11Q040 C/2011 Q4 (SWAN) (i=147.8°, q=1.112 AU, Q=84.944 AU, TP=2011 Sept. 21.08260 TT) from Haute Provence Obs. (Feb. 29.04-05p3)
CK11J020 C/2011 J2 (LINEAR) (i=122.8°, q=3.443 AU, TP=2013 Dec. 25.24764 TT) from Atlante Obs. (Feb. 27.98-01p3) and Moriyama Obs. (Feb. 29.66p2)
CK11G010 C/2011 G1 (McNaught) (i=162.2°, q=2.155 AU, TP=2011 Sept. 16.41341 TT) from PJMSO (Feb. 25.14-15p5)
CK11F010 C/2011 F1 (LINEAR) (i=56.6°, q=1.819 AU, TP=2013 Jan. 8.00561 TT) from Montcabre Obs. (Feb. 25.04-08p3 & March 2.04-08p3), Chante-Perdrix Obs. (Feb. 25.22-23p2), PJMSO (Feb. 26.36-38p6), Olmen Obs. (Feb. 26.93-94p3), La Vara Obs. (Feb. 26.98-99p3), Monte Deva Obs. (Feb. 28.04-07p5, 29.03-06p5 & March 1.99-02p5), Vallauris Obs. (Feb. 28.16-20p6), Cielo Profundo Obs. (Feb. 29.21-25p3), and Moriyama Obs. (Feb. 29.74-75p2)
PK11C020 P/2011 C2 (Gibbs) (Centaur, q=5.389 AU, Q=9.348 AU, TP=2012 Jan. 7.53868 TT) from Hidetaka Sato via RAS Obs. Mayhill (Jan. 23.46-47p2 & Feb. 25.47-48p2) and the Spacewatch 0.9m telescope (Feb. 26.29-33p3)
PK10U55H P/2010 UH55 (Spacewatch) (q=2.768 AU, Q=10.262 AU, TP=2011 May 10.36055 TT) from PS1 (Feb. 28.38-39p2)
PK10J81C P/2010 JC81 (WISE) (i=38.7°, q=1.811 AU, Q=14.471 AU, TP=2011 Apr. 26.56192 TT) from Brixiis Obs. (Feb. 1.89-90p3), Lumezzane Obs. (Feb. 22.05p4), Zonalunar Obs. (Feb. 26.90-93p2), LINEAR (Feb. 28.28-32p5 & 29.27-31p5), and Haute Provence Obs. (Feb. 28.99-01p2)
CK10G020 C/2010 G2 (Hill) (i=103.7°, q=1.981 AU, Q=190.505 AU, TP=2011 Sept. 2.05235 TT) from Brixiis Obs. (Feb. 1.77-78p3), Chante-Perdrix Obs. (Feb. 25.81-83p3), and La Vara Obs. (Feb. 26.85-86p3 & 27.84-85p3)
CK10F87B C/2010 FB87 (WISE-Garradd) (i=107.6°, q=2.843 AU, Q=603.719 AU, TP=2010 Nov. 7.38574 TT) from Kurihara Obs. (Feb. 22.46-47p3) and Zadko Obs. (Feb. 24.56-60p5)
CK09U89G C/2009 UG89 (Lemmon) (i=130.1°, q=3.931 AU, TP=2010 Dec. 16.27008 TT) from Malina River Obs. (Feb. 24.99-01p3)
CK09P010 C/2009 P1 (Garradd) (i=106.2°, q=1.551 AU, TP=2011 Dec. 23.67683 TT) from Brixiis Obs. (Feb. 2.21p1), Montseny Obs. (Feb. 18.99-02p10), Cordell-Lorenz Obs. (Feb. 22.38-45p7), Vallauris Obs. (Feb. 24.03-06p9, 28.13-16p9 & March 2.12-16p10), Sierra Stars Obs. (Feb. 24.45-51p4), Montcabre Obs. (Feb. 24.98-99p3, 28.94p1, 29.07p1, 29.14p1 & March 1.99-04p3), Atlante Obs. (Feb. 25.10-12p3), Chante-Perdrix Obs. (Feb. 25.19-21p3, 28.14-22p4 & March 2.20-22p3), Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) (Feb. 26.27p3), PJMSO (Feb. 26.38-39p6 & March 1.34-35p6), Olmen Obs. (Feb. 26.94-95p2 & 26.99p1), Cielo Profundo Obs. (Feb. 27.20-24p3), Astreo Obs. (Feb. 27.88-90p3), Monte Deva Obs. (Feb. 27.92-94p5, 28.87-88p5 & March 1.96-98p5), Haute Provence Obs. (Feb. 29.12-14p26), Moriyama Obs. (Feb. 29.72-73p2), and Eschenberg Obs. (March 1.86p3)
CK08S030 C/2008 S3 (Boattini) (i=162.7°, q=8.018 AU, TP=2011 June 7.40499 TT) from Dax Obs. (Jan. 11.79p1)
PK03T120 P/2003 T12 (SOHO) (q=0.575 AU, Q=4.562 AU, TP=2012 Jan. 26.45004 TT) from Schiaparelli Obs. (Feb. 21.77-78p2)
0256P 256P/LINEAR from Sato/RAS Mayhill (Jan. 31.41p2)
0246P 246P/NEAT from Brixiis Obs. (Feb. 2.14-16p5), Stixendorf Obs. (Feb. 22.92-93p5), Atlante Obs. (Feb. 25.14-16p3), Vicksburg Obs. (Feb. 25.47-49p4), Kevin Hills via RAS Obs. Moorook (Feb. 25.78-80p3), Olmen Obs. (Feb. 26.98-99p3), and Cielo Profundo Obs. (Feb. 27.14-18p3)
0244P 244P/Scotti from Brixiis Obs. (Feb. 1.83-84p2) and La Vara Obs. (Feb. 27.93p3 & 28.84-86p3)
0243P 243P/NEAT from Buchloe Obs. (Jan. 26.78p3)
0240P 240P/NEAT from Ametlla del Valles Obs. (Feb. 26.08p1 & 26.13-14p2)
0228P 228P/LINEAR from PS1 (Feb. 24.55-57p3)
0164P 164P/Christensen from Brixiis Obs. (Feb. 1.98-99p2), Haute Provence Obs. (Feb. 24.91-94p3), Olmen Obs. (Feb. 26.88-91p3), Atlante Obs. (Feb. 28.93-98p3), and PJMSO (March 1.25-26p5)
0117P 117P/Helin-Roman-Alu 1 from Hills/RAS Moorook (Feb. 25.76-78p3), Nagano Obs. (Feb. 27.69-70p4), and CSS (March 2.28-33p8)
0078P 78P/Gehrels 2 from Kurihara Obs. (Feb. 22.45p3), Chante-Perdrix Obs. (Feb. 24.84-85p2), Monte Deva Obs. (Feb. 27.84-85p5, 28.84-85p5 & March 1.84-86p5), and La Vara Obs. (Feb. 27.86p3 & 28.83p3)
0060P 60P/Tsuchinshan 2 from MLS (Feb. 25.15-17p4)
0049P 49P/Arend-Rigaux from Sant Celoni Obs. (Feb. 18.93-96p3), Haute Provence Obs. (Feb. 25.01-05p6), Torredembarra Obs. (Feb. 25.10-12p5), Vicksburg Obs. (Feb. 25.40-41p2), Hills/RAS Moorook (Feb. 25.74-75p3), Chante-Perdrix Obs. (Feb. 26.18-20p2), PJMSO (Feb. 26.31-32p6 & March 1.31-33p6), ISON-NM Obs. (Feb. 26.38-42p4), CSS (Feb. 26.46-48p4), Olmen Obs. (Feb. 26.96-97p3), La Vara Obs. (Feb. 26.96-97p3 & 27.97-98p3), Cordell-Lorenz Obs. (Feb. 27.18-20p2 & 28.31-33p2), Monte Deva Obs. (Feb. 27.96-99p5, 29.07-09p5 & March 2.05-07p5), Alginet Obs. (Feb. 29.90-91p3), and Rouet Obs. (March 1.87-90p5)
0029P 29P/Schwassmann-Wachmann 1 from Brixiis Obs. (Feb. 2.12p1), Montseny Obs. (Feb. 19.03-04p9), Atlante Obs. (Feb. 25.12-14p3), Vicksburg Obs. (Feb. 25.42-44p2), PJMSO (Feb. 26.32-33p4 & March 1.30-31p4), PS1 (Feb. 27.47-52p4), La Vara Obs. (Feb. 27.99p3), Monte Deva Obs. (Feb. 27.99-03p5), and Montcabre Obs. (March 2.10-12p3)
0021P 21P/Giacobini-Zinner from Stixendorf Obs. (Feb. 22.74-75p2) and Chante-Perdrix Obs. (Feb. 24.77-78p3 & 27.77-78p3)

MPEC 2012-E17 - "20:17 UT" - 2012 EC

K12E00C 2012 EC (risk-listed, Earth MOID=0.5 LD, i=0.9°, H=23.6 ~65m) from MLS (March 1.34-37p4, 1.46p2 & 2.39-41p4)

<< DOU on 2 Mar. '12 >> MPEC 2012-E16 - "06:04 UT" - Daily Orbit Update

Observations of risk-listed objects
K12D54J 2012 DJ54 (small asteroid, arc=3 days, H=28.9 ~6m, close passer) from the Spacewatch 1.8m telescope (March 1.39-40p3)
K12D43Y 2012 DY43 (small asteroid, arc=3 days, H=24.0 ~54m) from Spacewatch 1.8m (March 1.30-31p3)
K12D14A 2012 DA14 (small asteroid, arc=7 days, H=24.4 ~45m, close passer, radar support) from ISON-NM Obs. (Feb. 29.48-51p3 & March 1.47-49p3) and Sandlot Obs. (March 1.40-42p3)
K11A22X 2011 AX22 (small asteroid, arc=2 opp, H=24.7 ~39m) from Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) (Feb. 19.24-25p2 at R=22.1-8 & 20.37-38p2 at r=23.7)
Observations of recently (no longer) risk-listed objects
K12D32Z 2012 DZ32 (arc=4 days, H=21.4 ~178m) from Spacewatch 1.8m (March 1.45-46p3)
Observations of close-passing objects
K12E00A 2012 EA (arc=1 day, H=26.9 ~14m, close passer) from Schiaparelli Obs. (March 2.12p3)
K12D31N 2012 DN31 (arc=5 days, H=23.7 ~62m, close passer) from CSS (March 1.26-28p4)
K11W02N 2011 WN2 (arc=7 days, H=25.2 ~31m, close passer) from National Schools Obs. via the Liverpool Telescope (2011 Nov. 20.89p4)
Observation campaigns (radar support, potential mission destinations)
K02A00W 2002 AW (arc=3 opp, H=20.7 ~245m, PMD) from GiaGa Obs. (March 1.90-94p2)
E1018 141018 2001 WC47 (PMD, radar) from Montevenere Obs. (Feb. 29.92-93p3) and CSS (March 1.19-21p4)
-- Potential mission destinations list & ephemerides -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K12D32W 2012 DW32 (arc=5 days, H=25.3 ~29m) from Astronomical Research Obs. Westfield (March 1.36-37p4)
K12D31L 2012 DL31 (arc=6 days, H=22.8 ~93m) from ARO Westfield (March 1.30-31p3)
K12D31J 2012 DJ31 (arc=6 days, H=24.6 ~41m) from ARO Westfield (March 1.32p3) and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (March 1.39p3)
K11X01D 2011 XD1 (arc=87 days, H=23.9 ~56m) from NSO/Liverpool Tel. (2011 Dec. 17.97p4)
K08P01F 2008 PF1 (arc=2 opp, H=22.1 ~129m) from Schiaparelli Obs. (March 1.11-13p3)
K12D32V 2012 DV32 (arc=5 days, H=21.9 ~141m) from ARO Westfield (March 1.29p3)
K12B11J 2012 BJ11 (arc=43 days, H=21.9 ~141m) from Mirasteilas Obs. (March 2.08p3)
K11Y63M 2011 YM63 (arc=61 days, H=22.0 ~135m) from NSO/Liverpool Tel. (Jan. 23.98p4) and MLS (March 1.42-45p4)
Observations of other asteroidal objects
K12D61F 2012 DF61 (arc=3 days, H=20.5 ~269m) from LINEAR (March 1.16-20p4)
K12D31G 2012 DG31 (arc=6 days, H=19.9 ~355m) from ARO Westfield (March 1.40-41p3)
K12D08Q 2012 DQ8 (arc=9 days, H=21.3 ~186m) from Como Obs. (March 1.00-02p3), PJMSO (March 1.29p7), and ARO Westfield (March 1.32-34p6)
K12D04H 2012 DH4 (arc=12 days, H=20.6 ~257m) from CSS (March 1.29-31p4)
K12C29D 2012 CD29 (q=0.360 AU, arc=16 days, H=20.0 ~339m) from PJMSO (March 1.24-25p7)
K12C17C 2012 CC17 (arc=28 days, H=20.5 ~269m) from Mirasteilas Obs. (March 2.11-12p3)
K12BD4J 2012 BJ134 (q=0.374 AU, Q=4.138 AU, arc=42 days, H=18.2 ~776m) from PJMSO (March 1.23-24p6)
K12B20C 2012 BC20 (arc=41 days, H=18.4 ~708m) from CSS (March 1.38-40p4) and Mirasteilas Obs. (March 2.07p3)
K11Y15V 2011 YV15 (Q=4.394 AU, arc=3 opp, H=17.2 ~1.23 km) from PJMSO (March 1.29-30p5) and LINEAR (March 1.30-33p3)
K11X00C 2011 XC (arc=2 opp, H=20.9 ~224m) from NSO/Liverpool Tel. (2011 Dec. 3.98p4)
K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from PJMSO (March 1.23p6) and Mirasteilas Obs. (March 1.94-95p3)
K11S32O 2011 SO32 (arc=161 days, H=21.2 ~195m) from Spacewatch 1.8m (March 1.46-47p3)
K11S26O 2011 SO26 (Q=4.133 AU, arc=161 days, H=20.7 ~245m) from Schiaparelli Obs. (Feb. 28.00-02p2)
K11N00Y 2011 NY (arc=148 days, H=20.5 ~269m) from NSO/Liverpool Tel. (2011 July 22.06p4)
K11H00Q 2011 HQ (arc=74 days, H=21.1 ~204m) from NSO/Liverpool Tel. (2011 May 3.99-00p4)
K11H00O 2011 HO (Q=5.282 AU, arc=93 days, H=19.6 ~407m) from NSO/Liverpool Tel. (2011 May 8.94p4)
K10S03V 2010 SV3 (arc=2 opp, H=20.7 ~245m) from PJMSO (March 1.28p6)
K09Q08E 2009 QE8 (arc=3 opp, H=18.1 ~812m) from Schiaparelli Obs. (Feb. 28.06-08p2)
K08O01X 2008 OX1 (arc=2 opp, H=21.5 ~170m) from Trueblood/KPNO (Feb. 19.17p1 at R=22.1 & 19.21-22p3 at R=21.2-5)
K08E00R 2008 ER (arc=2 opp, H=21.3 ~186m) from MLS (March 1.29-31p4)
K07U03R 2007 UR3 (arc=4 opp, H=21.2 ~195m) from Spacewatch 0.9m (March 1.45-48p3)
K07D00K 2007 DK (arc=5 opp, H=19.4 ~446m) from CSS (March 1.29-31p4)
K06V13Y 2006 VY13 (Q=4.718 AU, arc=2 opp, H=17.3 ~1.17 km) from Mirasteilas Obs. (March 2.05-06p3)
K05A14H 2005 AH14 (arc=4 opp, H=17.1 ~1.29 km) from CSS (March 1.50-52p4)
K04Q07J 2004 QJ7 (arc=3 opp, H=18.5 ~676m) from PJMSO (March 1.25p5) and Mirasteilas Obs. (March 1.98p3)
K04B68D 2004 BD68 (q=0.324 AU, arc=3 opp, H=18.6 ~645m) from MLS (March 1.38-41p4)
K03F01H 2003 FH1 (arc=5 opp, H=18.1 ~812m) from Schiaparelli Obs. (Feb. 29.77-78p3)
K02C46W 2002 CW46 (arc=4 opp, H=19.0 ~537m) from Spacewatch 0.9m (Feb. 25.33-36p3)
K00J78O 2000 JO78 (arc=6 opp, H=17.8 ~933m) from MLS (Feb. 24.23-26p4 at V=21.8-22.4)
V2942 312942 1995 EK1 from LINEAR (March 1.27-32p5)
V0737 310737 2002 QG24 from MLS (March 1.21-24p4)
Q3976 263976 2009 KD5 from PJMSO (March 1.33-34p5)
N8063 238063 2003 EG from Spacewatch 0.9m (March 1.28-31p3)
N7805 237805 2002 CF26 from CSS (March 1.19-21p4)
I9008 189008 1996 FR3 from LINEAR (March 1.46-49p4)
G3000 163000 2001 SW169 from PJMSO (March 1.20-21p5)
F2667 152667 1998 FR11 from LINEAR (March 1.23-27p4)
E3651 143651 2003 QO104 from CSS (March 1.10-11p4)
E1531 141531 2002 GB from Spacewatch 0.9m (March 1.50-53p3)
D7925 137925 2000 BJ19 from CSS (March 1.26-28p4)
A1873 101873 1999 NC5 from PJMSO (March 1.21-22p5)
99799 99799 2002 LJ3 from Spacewatch 1.8m (March 1.12p3)
85990 85990 1999 JV6 from PJMSO (March 1.22p5) and GiaGa Obs. (March 1.92-96p2)
32906 32906 1994 RH from LINEAR (March 1.10-15p5)
24475 24475 2000 VN2 from Bernezzo Obs. (Feb. 29.86-92p8)
21277 21277 1996 TO5 from CSS (March 1.35-37p4)
16912 16912 Rhiannon (1998 EP8) from Spacewatch 0.9m (March 1.34-37p3)
06050 6050 Miwablock (1992 AE) from Alginet Obs. (Feb. 29.87-89p3) and LINEAR (March 1.16-20p5)
05693 5693 1993 EA from MLS (March 1.51-53p4)
05587 5587 1990 SB from LINEAR (March 1.33-38p5)
03554 3554 Amun (1986 EB) from LINEAR (March 1.39-44p5)
03103 3103 Eger (1982 BB) from Alginet Obs. (Feb. 29.91-92p3)
01862 1862 Apollo (1932 HA) from PJMSO (March 1.22-23p5)
01627 1627 Ivar (1929 SH) from Alginet Obs. (Feb. 29.83-85p3)

MPEC 2012-E15 - "02:56 UT" - 2012 DK61

K12D61K 2012 DK61 (H=20.9 ~224m) from Spacewatch 0.9m (Feb. 23.28-31p3 & March 1.21-25p3), PS1 (Feb. 24.54-56p3), Spacewatch 1.8m (March 1.31p3), and St. Pardon de Conques Obs. (March 1.99-02p3)

MPEC 2012-E14 - "02:01 UT" - Comet C/2012 BJ98

CK12B98J C/2012 BJ98 (Centaur, q=2.157 AU, Q=32.007 AU, TP=2012 Sept. 20.60655 TT) from Spacewatch 0.9m (2011 Dec. 29.41-45p3, Jan. 6.41-45p3 & 14.16-20p3), MLS (Jan. 26.25-27p4, Feb. 10.17-20p4 & March 1.21-24p4), PS1 (Jan. 26.50-54p3), and CSS (Jan. 31.25-27p4)

MPEC 2012-E13 - "00:26 UT" - 2012 EB

K12E00B 2012 EB (small asteroid, H=23.7 ~62m) from CSS (March 1.27-37p12), Eschenberg Obs. (March 1.78-79p6), Raheny Obs. (March 1.93-94p3), Saint-Barthelemy Obs. (March 1.93p3), Schiaparelli Obs. (March 1.96-97p3), St. Pardon de Conques Obs. (March 1.97-98p3), and GiaGa Obs. (March 1.97-98p2)

Observers on 2 March '12

A total of 60 observers appear in today's MPECs.

Code	Observer / observatory
`J97`	Alginet Obs. in Spain, 4 in MPECs 2012-E16 & 2012-E18 -- 6050, 3103, 1627, 49P
`B37`	Ametlla del Valles Obs. in Spain, 1 in MPEC 2012-E18 -- 240P
`251`	Arecibo in Puerto Rico, 2 in radar -- 2011 CP4, 2002 QC7
`I92`	Astreo Obs., 1 in MPEC 2012-E18 -- C/2009 P1
`H21`	Astronomical Research Obs. Westfield in Illinois, 6 in MPEC 2012-E16 -- 2012 DW32, 2012 DV32, 2012 DQ8, 2012 DL31, 2012 DJ31, 2012 DG31
`J51`	Atlante Obs. in the Canary Islands, 5 in MPEC 2012-E18 -- C/2011 J2, C/2009 P1, 246P, 164P, 29P
`C77`	Bernezzo Obs. in Italy, 1 in MPEC 2012-E16 -- 24475
`B75`	Betelgeuse Station in Italy, 2 in MPEC 2012-E18 -- C/2012 CH17, C/2012 A2
`B96`	Brixiis Obs. in Belgium, 7 in MPEC 2012-E18 -- P/2010 JC81, C/2010 G2, C/2009 P1, 246P, 244P, 164P, 29P
`215`	Buchloe Obs. in Germany, 1 in MPEC 2012-E18 -- 243P
`703`	Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2012-E13, 2012-E14, 2012-E16 & 2012-E18 -- 2012 EB, 2012 DN31, 2012 DH4, C/2012 CH17, C/2012 BJ98, 2012 BC20, 2007 DK, 2005 AH14, 237805, 21277, 143651, 141018, 137925, 117P, 49P
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-E16 -- 2012 DJ31
`A77`	Chante-Perdrix Obs. in France, 6 in MPEC 2012-E18 -- C/2011 F1, C/2010 G2, C/2009 P1, 78P, 49P, 21P
`J01`	Cielo Profundo Obs. in Spain, 3 in MPEC 2012-E18 -- C/2011 F1, C/2009 P1, 246P
`C13`	Como Obs. in Italy, 1 in MPEC 2012-E16 -- 2012 DQ8
`850`	Cordell-Lorenz Obs. in Tennessee, 2 in MPEC 2012-E18 -- C/2009 P1, 49P
`958`	Dax Obs. in France, 1 in MPEC 2012-E18 -- C/2008 S3
`G48`	Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-E18 -- C/2009 P1
`151`	Eschenberg Obs. in Switzerland, 2 in MPECs 2012-E13 & 2012-E18 -- 2012 EB, C/2009 P1
`203`	GiaGa Obs. in Italy, 3 in MPECs 2012-E13 & 2012-E16 -- 2012 EB, 2002 AW, 85990
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2011 CP4
`511`	Haute Provence Obs. in Germany, 8 in MPEC 2012-E18 -- C/2012 CH17, P/2012 B1, C/2012 A2, C/2011 Q4, P/2010 JC81, C/2009 P1, 164P, 49P
`H15`	ISON-NM Obs. in New Mexico, 2 in MPECs 2012-E16 & 2012-E18 -- 2012 DA14, 49P
`695]`	Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 2 in MPEC 2012-E16 -- 2011 AX22, 2008 OX1
`D95`	Kurihara Obs. in Japan, 4 in MPEC 2012-E18 -- C/2012 CH17, C/2012 C2, C/2010 FB87, 78P
`704`	LINEAR in New Mexico, 11 in MPECs 2012-E16 & 2012-E18 -- 2012 DF61, C/2012 B3, 2011 YV15, P/2010 JC81, 32906, 312942, 189008, 152667, 6050, 5587, 3554
`J38`	La Vara Obs. in Spain, 8 in MPEC 2012-E18 -- C/2012 CH17, P/2012 B1, C/2011 F1, C/2010 G2, 244P, 78P, 49P, 29P
`J131`	National Schools Obs. via the Liverpool Telescope in the Canary Islands, 7 in MPEC 2012-E16 -- 2011 YM63, 2011 XD1, 2011 XC, 2011 WN2, 2011 NY, 2011 HQ, 2011 HO
`130`	Lumezzane Obs. in Italy, 4 in MPEC 2012-E18 -- C/2012 C2, P/2012 B1, C/2012 A1, P/2010 JC81
`B90`	Malina River Obs. in Italy, 1 in MPEC 2012-E18 -- C/2009 UG89
`B67`	Mirasteilas Obs. in Switzerland, 6 in MPEC 2012-E16 -- 2012 CC17, 2012 BJ11, 2012 BC20, 2011 SL102, 2006 VY13, 2004 QJ7
`118`	Modra Obs. in Slovakia, 1 in MPEC 2012-E18 -- C/2012 B3
`213`	Montcabre Obs. in Spain, 6 in MPEC 2012-E18 -- C/2012 CH17, P/2012 B1, C/2012 A2, C/2011 F1, C/2009 P1, 29P
`945`	Monte Deva Obs. in Spain, 5 in MPEC 2012-E18 -- C/2011 F1, C/2009 P1, 78P, 49P, 29P
`C91`	Montevenere Obs., 2 in MPECs 2012-E16 & 2012-E18 -- C/2012 CH17, 141018
`B06`	Montseny Obs. in Spain, 2 in MPEC 2012-E18 -- C/2009 P1, 29P
`900`	Moriyama Obs. in Japan, 5 in MPEC 2012-E18 -- C/2012 CH17, C/2012 A2, C/2011 J2, C/2011 F1, C/2009 P1
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 9 in MPECs 2012-E14, 2012-E16, 2012-E17 & 2012-E18 -- 2012 EC, C/2012 BJ98, 2011 YM63, 2008 ER, 2004 BD68, 2000 JO78, 310737, 5693, 60P
`D81`	Nagano Obs. in Japan, 1 in MPEC 2012-E18 -- 117P
`C23`	Olmen Obs. in Belgium, 6 in MPEC 2012-E18 -- C/2012 CH17, C/2011 F1, C/2009 P1, 246P, 164P, 49P
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 6 in MPECs 2012-E14, 2012-E15 & 2012-E18 -- 2012 DK61, C/2012 BJ98, P/2011 VJ5, P/2010 UH55, 228P, 29P
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 20 in MPECs 2012-E16 & 2012-E18 -- 2012 DQ8, C/2012 CH17, 2012 CD29, 2012 BJ134, P/2012 B1, 2011 YV15, 2011 SL102, C/2011 G1, C/2011 F1, 2010 SV3, C/2009 P1, 2004 QJ7, 85990, 263976, 163000, 101873, 1862, 164P, 49P, 29P
`H06\|`	Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 2 in MPEC 2012-E18 -- P/2011 C2, 256P
D90`	Kevin Hills in England via RAS Obs. Moorook in South Australia, 3 in MPEC 2012-E18 -- 246P, 117P, 49P
`J41`	Raheny Obs. in Ireland, 1 in MPEC 2012-E13 -- 2012 EB
`C09`	Rouet Obs. in France, 2 in MPEC 2012-E18 -- C/2012 A2, 49P
`B04`	Saint-Barthelemy Obs. in Italy, 1 in MPEC 2012-E13 -- 2012 EB
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2012-E16 -- 2012 DA14
`B70`	Sant Celoni Obs. in Spain, 2 in MPEC 2012-E18 -- C/2012 CH17, 49P
`204`	Schiaparelli Obs. in Italy, 11 in MPECs 2012-E13, 2012-E16 & 2012-E18 -- 2012 EB, 2012 EA, C/2012 CH17, C/2012 C2, C/2012 BJ98, P/2012 B1, 2011 SO26, 2009 QE8, 2008 PF1, P/2003 T12, 2003 FH1
`G68`	Sierra Stars Obs. in northern California, 1 in MPEC 2012-E18 -- C/2009 P1
`691`	Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2012-E14, 2012-E15, 2012-E16 & 2012-E18 -- 2012 DK61, C/2012 BJ98, P/2011 C2, 2007 UR3, 2002 CW46, 238063, 16912, 141531
`291`	Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2012-E15 & 2012-E16 -- 2012 DZ32, 2012 DY43, 2012 DK61, 2012 DJ54, 2011 SO32, 99799
`I93`	St. Pardon de Conques Obs. in France, 2 in MPECs 2012-E13 & 2012-E15 -- 2012 EB, 2012 DK61
`A71`	Stixendorf Obs. in Austria, 5 in MPEC 2012-E18 -- C/2012 CH17, C/2012 C2, C/2012 A2, 246P, 21P
`A03`	Torredembarra Obs. in Spain, 1 in MPEC 2012-E18 -- 49P
`B51`	Vallauris Obs. in France, 3 in MPEC 2012-E18 -- C/2012 CH17, C/2011 F1, C/2009 P1
`H47`	Vicksburg Obs. in Mississippi, 3 in MPEC 2012-E18 -- 246P, 49P, 29P
`D20`	Zadko Obs. in Western Australia, 1 in MPEC 2012-E18 -- C/2010 FB87
`J08`	Zonalunar Obs. in Spain, 1 in MPEC 2012-E18 -- P/2010 JC81

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 2 March '12

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2316 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 risk pages.
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	2316	2017-2111	303	2.5e-05	-3.99	-4.29	0	JPL: "Analysis based on 10 observations spanning 1.0688 days (2012-Mar-01.3419 to 2012-Mar-02.41071)." Diameter approximately 0.065 km. from mean, weighted H=23.6.

2012 DG61	JPL Sentry	0107	2028-2110	13	3.5e-09	-4.44	-4.72	0	JPL: "Analysis based on 26 observations spanning 2.6073 days (2012-Feb-28.32729 to 2012-Mar-01.93457)." Diameter approximately 1.095 km. from mean, weighted H=17.4.

2012 DW60	NEODyS	1701	2065-2090	48	4.63e-06	-6.27	-6.88	0	NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2012-02-29.495 to 2012-03-01.450."

2012 DJ54	JPL Sentry	1701	2068-2102	9	9.2e-05	-6.15	-6.39	0	JPL: "Analysis based on 15 observations spanning 2.9304 days (2012-Feb-27.46779 to 2012-Mar-01.39817)." Diameter approximately 0.006 km. from mean, weighted H=28.7.
2012 DJ54	NEODyS	1701	2068-2086	5	4.74e-05	-6.36	-6.41	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2012-02-27.469 to 2012-03-01.399."

2012 DY43	NEODyS	1701	R E M O V E D						-

2012 DA14	JPL Sentry	1701	2020-2042	27	7.0e-05	-3.58	-4.03	0	JPL: "Analysis based on 82 observations spanning 7.4575 days (2012-Feb-23.03431 to 2012-Mar-01.49183)." Diameter approximately 0.044 km. from mean, weighted H=24.4.
2012 DA14	NEODyS	1701	2020-2090	335	3.47e-04	-3.17	-3.96	0	NEODyS: "Based on 76 optical observations (of which 3 are rejected as outliers) from 2012-02-23.029 to 2012-03-01.098."

2011 AX22	JPL Sentry	1701	R E M O V E D						JPL: Risk listing removed at 1003 UTC.

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 2 March '12

Times are UTC for when items were noted or added by The Tracking News.

2316	Noted that JPL Sentry has posted 2012 EC as an impact risk - see above Grabbed MPEC 2012-E18 - Observations and Orbits of Comets - see above
2103	Grabbed MPEC 2012-E17 - 2012 EC - see above
1926	Updated Traffic Report
1701	Noted that JPL Sentry has removed 2011 AX22 as an impact risk - 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 DJ54 risk assessment - see above Noted that NEODyS has updated its 2012 DJ54 risk assessment - see above Noted that NEODyS has posted 2012 DW60 as an impact risk - see above Noted that NEODyS has removed 2012 DY43 as an impact risk - see above Grabbed MPEC 2012-E16 - Daily Orbit Update - see above
0602	Grabbed MPEC 2012-E15 - 2012 DK61 - see above
0248	Grabbed MPEC 2012-E14 - Comet C/2012 BJ98 - see above Noted Radar Astrometry database update - see above
0107	Noted that JPL Sentry has posted 2012 DG61 as an impact risk - see above Noted Radar Astrometry database update - see above
0027	Grabbed MPEC 2012-E13 - 2012 EB - see above

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