2012-04-14 Tracking News

Contents on 14 April '12

Traffic Report -- one object
IAU Minor Planet Center
- NEOCP Activity -- 34 listings
- New MPECs -- nine MPECs
Observers -- 49 observers
Impact Risk Monitoring -- two objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page (archive)
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 7 April
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 14 April '12

One object reported inside ten LD

One asteroid may be within ten lunar distances (LD) of our planet today. 2007 HV4, not reported observed so far on this return visit, is calculated with an Earth passage uncertainty of +/- 1.748 days to enter ten LD today, passing from 11.5 to 9.7 LD*.

Coming our way next, radar target 2012 GP1 arrives inside ten LD on April 17th and 1992 JD arrives inside ten LD on April 30th (uncertainty +/- 4.600 hours).

This report was generated at 1712 UTC with follow-up from late March for 2012 EG5 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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity on 14 April '12

The MPC's NEO Confirmation Page has 34 listings

When last checked at 2321 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 34 objects listed. Of these, 30 were "one nighters." The Tracking News counted a total of 46 listings on the NEOCP on this day.

New MPECs on 14 April '12

Minor Planet Electronic Circulars

There were nine MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-G39 time-stamped "06:03 UT" - Daily Orbit Update - see below
MPEC 2012-G40 time-stamped "17:04 UT" - 2012 GA5 - see below
MPEC 2012-G41 time-stamped "17:05 UT" - 2012 GB5 - see below
MPEC 2012-G42 time-stamped "17:15 UT" - 2012 GC5 - see below
MPEC 2012-G43 time-stamped "17:17 UT" - 2012 GD5 - see below
MPEC 2012-G44 time-stamped "17:18 UT" - 2012 GE5 - see below
MPEC 2012-G45 time-stamped "20:04 UT" - Observations and Orbits of Comets - see below
MPEC 2012-G46 time-stamped "22:45 UT" - 2012 GS5 - see below
MPEC 2012-G47 time-stamped "23:25 UT" - 2012 GT5

MPEC 2012-G47 - "23:25 UT" - 2012 GT5

K12G05T 2012 GT5 (H=20.5 ~269m) from Pan-STARRS 1 (PS1) (April 12.35-38p3), the Spacewatch 1.8m telescope (April 13.26-27p3), and Tim Lister via Faulkes Telescope North (April 14.33p3)

MPEC 2012-G46 - "22:45 UT" - 2012 GS5

K12G05S 2012 GS5 (Q=6.223 AU, H=18.7 ~616m) from PS1 (April 11.39-45p4), Great Shefford Obs. (April 11.94p3), Schiaparelli Obs. (April 11.96-98p3), Tenagra II Obs. (April 12.21-22p8), Astronomical Research Obs. Westfield (April 12.25-26p3), Paul Roche via Faulkes Telescope North (April 12.47-48p3), St. Pardon de Conques Obs. (April 12.92-94p3), Spacewatch 1.8m (April 13.45p3), and Bisei Spaceguard Center (April 14.57-58p6)

<< OOC on 14 Apr. '12 >> MPEC 2012-G45 - "20:04 UT" - Observations and Orbits of Comets

CK12F060 C/2012 F6 (Lemmon) (i=82.5°, q=0.731 AU, TP=2013 Mar. 23.76457 TT) from Schwarzschild Obs. (March 23.88-90p2) and Hidetaka Sato via RAS Obs. Mayhill (April 10.14-15p3)
PK12F050 P/2012 F5 (Gibbs) (q=2.875 AU, TP=2010 Mar. 1.78570 TT) from PS1 (Feb. 28.50p1) and Schwarzschild Obs. (March 22.89-98p4)
CK12F030 C/2012 F3 (Panstarrs) (i=11.2°, q=3.505 AU, TP=2015 Apr. 1.75465 TT) from Sato/RAS Mayhill (April 10.16-17p3)
CK12F010 C/2012 F1 (Gibbs) (i=159.4°, q=2.551 AU, Q=162.850 AU, TP=2012 Feb. 19.11807 TT) from Sato/RAS Mayhill (April 10.18-19p2)
CK12E030 C/2012 E3 (Panstarrs) (i=105.5°, q=3.819 AU, Q=250.441 AU, TP=2011 May 11.38269 TT) from Schwarzschild Obs. (March 16.07-08p2)
CK12C17H C/2012 CH17 (MOSS) (q=1.296 AU, Q=405038.016 AU, TP=2012 Sept. 28.24461 TT) from Kourovskaya Obs. (March 29.71p1, 29.79p1 & 29.87p1), Pear Tree Obs. (April 2.05-08p3 & 10.07-11p3), Kevin Hills via RAS Obs. Moorook (April 8.57p2), Cielo Profundo Obs. (April 9.91-92p3), Galati Obs. (April 10.83-84p3), Stixendorf Obs. (April 10.90-92p7), LINEAR (April 11.24-27p4 & 12.17-22p5), and Nonndorf Obs. (April 12.92-94p3)
CK12C010 C/2012 C1 (McNaught) (i=96.3°, q=4.836 AU, Q=2934.555 AU, TP=2013 Feb. 4.85796 TT) from Hills/RAS Moorook (April 8.49-51p3)
CK12B98J C/2012 BJ98 (Centaur, q=2.157 AU, Q=32.005 AU, TP=2012 Sept. 20.43117 TT) from Hills/RAS Moorook (April 3.55-56p2 & 10.45-46p3), PS1 (April 4.34-35p2), Montcabre Obs. (April 7.84-85p3), and Sato/RAS Mayhill (April 12.15p2)
CK12B030 C/2012 B3 (La Sagra) (i=106.9°, q=3.536 AU, TP=2011 Dec. 6.82162 TT) from Montcabre Obs. (April 9.02p1 & 9.09-10p2) and Vitebsk Obs. (April 12.95-96p4)
PK12B010 P/2012 B1 (Panstarrs) (q=3.826 AU, Q=9.156 AU, TP=2013 July 23.17013 TT) from Sato/RAS Mayhill (April 11.13-14p3)
CK12A020 C/2012 A2 (LINEAR) (i=125.9°, q=3.537 AU, Q=1951.957 AU, TP=2012 Nov. 5.08885 TT) from Kiev Comet Station (March 18.98-99p14), Cielo Profundo Obs. (April 8.86-89p3), Stixendorf Obs. (April 10.93-94p5), and Olmen Obs. (April 11.12-13p3)
CK11Y030 C/2011 Y3 (Boattini) (Centaur, q=3.498 AU, Q=20.256 AU, TP=2011 Aug. 22.83298 TT) from Sato/RAS Mayhill (2011 Dec. 29.31-32p2)
PK11Y020 P/2011 Y2 (Boattini) (q=1.787 AU, Q=10.657 AU, TP=2012 Mar. 21.69081 TT) from Sato/RAS Mayhill (April 11.12p2)
CK11UU5F C/2011 UF305 (LINEAR) (i=94.0°, q=2.138 AU, TP=2012 July 22.16034 TT) from Stixendorf Obs. (April 10.96-97p10), Oleksandr V. Shulga via Nikolaev Obs. (April 11.07-08p3), Olmen Obs. (April 11.07-08p3), and Nonndorf Obs. (April 12.97-98p4)
CK11S020 C/2011 S2 (Kowalski) (Centaur, q=1.115 AU, Q=31.476 AU, TP=2011 Oct. 26.34729 TT) from Sato/RAS Mayhill (2011 Dec. 31.53-54p3)
CK11Q040 C/2011 Q4 (SWAN) (i=147.8°, q=1.112 AU, Q=84.904 AU, TP=2011 Sept. 21.08307 TT) from Sato/RAS Mayhill (2011 Dec. 31.52-53p4 & Jan. 5.50-51p3)
PK11N010 P/2011 N1 (ASH) (q=2.858 AU, Q=9.748 AU, TP=2012 May 31.08756 TT) from Sato/RAS Mayhill (2011 Dec. 31.06p2)
CK11L040 C/2011 L4 (Panstarrs) (i=84.2°, q=0.302 AU, TP=2013 Mar. 10.16687 TT) from Auger Obs. (March 25.31-33p6)
CK11J020 C/2011 J2 (LINEAR) (i=122.8°, q=3.443 AU, TP=2013 Dec. 25.27487 TT) from Rhozen Obs. (Feb. 23.88-92p13), LINEAR (March 21.22-26p5 & 24.28-32p5), and Hills/RAS Moorook (April 8.59-60p3)
CK11F010 C/2011 F1 (LINEAR) (i=56.6°, q=1.819 AU, TP=2013 Jan. 8.00718 TT) from Sato/RAS Mayhill (2011 Dec. 29.54p5), Blanes Obs. (April 6.84-85p3 & 9.98-99p3), Rodeno Obs. (April 6.96-98p3), Blanquita Obs. (April 7.91-92p3), Carpe-Noctem Obs. (April 8.01-02p3 & 8.94-98p3), Montcabre Obs. (April 8.05-07p3), Masquefa Obs. (April 8.92-94p3), Cielo Profundo Obs. (April 8.99-01p3), Stixendorf Obs. (April 9.86-88p8), Olmen Obs. (April 11.13-14p3), Vitebsk Obs. (April 12.93-94p4), and Nonndorf Obs. (April 12.96-97p4)
PK11C020 P/2011 C2 (Gibbs) (Centaur, q=5.389 AU, Q=9.348 AU, TP=2012 Jan. 7.52713 TT) from the Spacewatch 0.9m telescope (April 11.15-20p3)
CK11A030 C/2011 A3 (Gibbs) (q=2.345 AU, Q=2119.437 AU, TP=2011 Dec. 16.08869 TT) from Auger Obs. (March 22.39-40p2 & April 1.37-39p4)
CK10U030 C/2010 U3 (Boattini) (i=55.5°, q=8.448 AU, Q=6335.856 AU, TP=2019 Feb. 28.17555 TT) from the Mt. Lemmon Survey (MLS) (2010 Nov. 12.23-25p4)
CK10S010 C/2010 S1 (LINEAR) (i=125.3°, q=5.900 AU, TP=2013 May 20.32280 TT) from O.V. Shulga/Nikolaev Obs. (April 11.06p4) and Olmen Obs. (April 11.14-15p3)
CK10R010 C/2010 R1 (LINEAR) (i=156.9°, q=5.621 AU, TP=2012 May 18.89836 TT) from Vicksburg Obs. (March 24.42-44p3, 25.40-44p4, 26.44-47p3, 27.38-40p4, April 12.35p1 & 12.40-42p2), Hills/RAS Moorook (April 9.78-79p3), and Nonndorf Obs. (April 12.99p4)
CK10G020 C/2010 G2 (Hill) (i=103.7°, q=1.981 AU, Q=190.505 AU, TP=2011 Sept. 2.05233 TT) from Rhozen Obs. (Feb. 23.77-78p3) and Auger Obs. (March 22.03-05p3)
CK09P010 C/2009 P1 (Garradd) (i=106.2°, q=1.551 AU, TP=2011 Dec. 23.67710 TT) from E. Bryssinck via RAS Obs. Mayhill (March 29.23-24p6, April 10.23-24p4 & 11.16-17p4), Sierra Stars Obs. (April 2.16p1 & 2.22-24p2), Blanes Obs. (April 6.83-84p3 & 9.94p3), Rodeno Obs. (April 6.84-85p3), Blanquita Obs. (April 7.86-87p3), Carpe-Noctem Obs. (April 7.93p3 & 8.93p3), Montcabre Obs. (April 8.81p3), Cielo Profundo Obs. (April 8.84-85p3), Masquefa Obs. (April 8.87-88p3), Baldone Obs. (April 9.81p8 & 10.80p3), Stixendorf Obs. (April 9.82p10), Olmen Obs. (April 11.09p3), Cordell-Lorenz Obs. (April 12.12-16p3, 13.11-20p5 & 14.13-17p3), and Nonndorf Obs. (April 12.94-96p6)
CK09F040 C/2009 F4 (McNaught) (i=79.3°, q=5.455 AU, TP=2011 Dec. 31.90225 TT) from Auger Obs. (March 22.05-06p4) and Hills/RAS Moorook (April 4.42-43p3 & 9.42-43p3)
CK07D010 C/2007 D1 (LINEAR) (i=41.5°, q=8.794 AU, TP=2007 June 19.45768 TT) from Sato/RAS Mayhill (2011 Dec. 30.51p2)
CK06S030 C/2006 S3 (LONEOS) (i=166.0°, q=5.131 AU, TP=2012 Apr. 16.34725 TT) from Vicksburg Obs. (March 25.45-47p4 & April 12.45-46p4), Auger Obs. (April 1.35-36p3), and O.V. Shulga/Nikolaev Obs. (April 11.06-08p4)
CK05L030 C/2005 L3 (McNaught) (i=139.4°, q=5.593 AU, Q=125685.861 AU, TP=2008 Jan. 16.00593 TT) from Sato/RAS Mayhill (2011 Dec. 29.34p2)
0255P 255P/Levy from Sato/RAS Mayhill (Jan. 6.07p4)
0246P 246P/NEAT from Vicksburg Obs. (March 25.35-36p3, 26.32-35p3, 27.37p3 & April 12.32p2), Hills/RAS Moorook (April 8.61-62p3 & 12.67-68p3), Terrassa Obs. (April 8.96-97p6), Stixendorf Obs. (April 9.83-85p11), O.V. Shulga/Nikolaev Obs. (April 10.95-98p11), Galati Obs. (April 11.02-03p13), Olmen Obs. (April 11.10-11p3), and Nonndorf Obs. (April 12.87-89p6)
0240P 240P/NEAT from Sato/RAS Mayhill (Jan. 5.49-50p3)
0237P 237P/LINEAR from NEAT's Mt. Palomar telescope (2002 July 4.17-22p3), Castelmartini Obs. (2010 Aug. 2.97-98p3), Cielo Profundo Obs. (2010 Sept. 10.97-99p3), Bergisch Gladbach Obs. (2010 Sept. 11.81-83p3), MLS (2010 Sept. 16.36-38p4), and Andrushivka Obs. (2010 Sept. 18.89-90p4)
0203P 203P/Korlevic from WISE (2010 Feb. 25.28p1, 2010 Feb. 25.35p1 & 2010 Feb. 25.42p1)
0182P 182P/LONEOS from Sato/RAS Mayhill (April 10.20-21p3)
0171P 171P/Spahr from Sato/RAS Mayhill (April 12.12-13p2)
0164P 164P/Christensen from Kiev Comet Sta. (March 14.88-89p6) and Vicksburg Obs. (March 26.17-21p3 & April 8.08-12p3)
0152P 152P/Helin-Lawrence from Sato/RAS Mayhill (2011 Dec. 29.53p3)
0117P 117P/Helin-Roman-Alu 1 from Sato/RAS Mayhill (Jan. 6.40p2), Kiev Comet Sta. (March 13.92p2), and Hills/RAS Moorook (April 10.51-52p3)
0088P 88P/Howell from MLS (2010 Nov. 27.32-34p4)
0078P 78P/Gehrels 2 from Rhozen Obs. (Feb. 23.74-76p15 & 24.76-77p5), Kurihara Obs. (April 5.43-44p3 & 8.43p3), Rodeno Obs. (April 6.82-83p3), Montcabre Obs. (April 7.80-82p3), and Masquefa Obs. (April 8.85-86p3)
0074P 74P/Smirnova-Chernykh from Hills/RAS Moorook (April 11.81-82p3)
0060P 60P/Tsuchinshan 2 from Sato/RAS Mayhill (April 10.12-13p4)
0049P 49P/Arend-Rigaux from Kiev Comet Sta. (March 14.94-95p8), Vicksburg Obs. (March 25.28-29p4 & 26.23-26p3), Pear Tree Obs. (April 2.11-14p3 & 9.09-13p3), Blanquita Obs. (April 8.88-90p3), Cielo Profundo Obs. (April 8.90-93p3), Blanes Obs. (April 9.95-96p3), PS1 (April 10.27-29p3), O.V. Shulga/Nikolaev Obs. (April 10.97-99p6), Galati Obs. (April 11.00-02p12), Olmen Obs. (April 11.06-07p3), LINEAR (April 12.23-28p5), Nonndorf Obs. (April 12.82-83p4), Vitebsk Obs. (April 12.86-88p4), and Cordell-Lorenz Obs. (April 13.15-21p5)
0045P 45P/Honda-Mrkos-Pajdusakova from PS1 (April 12.35-39p4)
0029P 29P/Schwassmann-Wachmann 1 from Sato/RAS Mayhill (Jan. 1.54p4), El Leoncito Obs. (March 18.27-32p4, 23.21-24p3 & 24.19-23p4), Auger Obs. (March 22.14-15p5), Vicksburg Obs. (March 25.34-35p2, 26.28-30p3 & 27.34-36p4), Pear Tree Obs. (April 2.16-18p3), Cielo Profundo Obs. (April 8.95-97p3), Hills/RAS Moorook (April 9.73-75p3), Blanes Obs. (April 9.97p3), O.V. Shulga/Nikolaev Obs. (April 10.97p2), Olmen Obs. (April 11.04-05p3), Cruz del Sur Obs. (April 11.06-10p3), and Nonndorf Obs. (April 12.85-87p4)

MPEC 2012-G44 - "17:18 UT" - 2012 GE5

K12G05E 2012 GE5 (risk listed, Q=4.533 AU, H=26.1 ~20m) from PS1 (April 12.36-39p3) and David Tholen's team on Mauna Kea (April 13.25-26p3)

MPEC 2012-G43 - "17:17 UT" - 2012 GD5

K12G05D 2012 GD5 (small asteroid, H=22.6 ~102m) from PS1 (April 12.35-39p3 at w=21.9-22.1), Spacewatch 1.8m (April 13.38-39p3), and Lister/Faulkes North (April 14.34-35p3)

MPEC 2012-G42 - "17:15 UT" - 2012 GC5

K12G05C 2012 GC5 (small asteroid, H=25.4 ~28m) from PS1 (April 12.34-39p4) and Tholen team/Mauna Kea (April 13.25p3)

MPEC 2012-G41 - "17:05 UT" - 2012 GB5

K12G05B 2012 GB5 (small asteroid, H=23.8 ~59m) from PS1 (April 12.34-39p4), Spacewatch 1.8m (April 13.16-17p3), and Lister/Faulkes North (April 14.28-29p7)

MPEC 2012-G40 - "17:04 UT" - 2012 GA5

K12G05A 2012 GA5 (small asteroid, H=24.4 ~45m) from PS1 (April 12.34-38p6), Spacewatch 1.8m (April 13.30p3), and Lister/Faulkes North (April 14.31-32p4)

<< DOU on 14 Apr. '12 >> MPEC 2012-G39 - "06:03 UT" - Daily Orbit Update

Observations of risk-listed objects
K12F71B 2012 FB71 (small asteroid, Q=4.534 AU, arc=15 days, H=24.4 ~45m) from Spacewatch 1.8m (April 13.20-24p3 at R=22.1-2)
Observations of recently (no longer) risk-listed objects
K12F52M 2012 FM52 (arc=17 days, H=18.6 ~645m) from Spacewatch 1.8m (April 13.49-50p3)
K12E05G 2012 EG5 (small asteroid, arc=21 days, H=24.3 ~47m, close passer) from Kourovskaya Obs. (March 29.70p1, 29.78p1 & 29.82p1)
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K12G02D 2012 GD2 (arc=1 day, H=22.9 ~89m) from LINEAR (April 13.25-27p3)
K12G02C 2012 GC2 (arc=1 day, H=22.9 ~89m) from LINEAR (April 13.24-27p4)
K12F58G 2012 FG58 (arc=16 days, H=21.9 ~141m) from Cordell-Lorenz Obs. (April 13.29-31p3) and Spacewatch 1.8m (April 13.49p3)
Observations of other asteroidal objects
K12F62P 2012 FP62 (arc=14 days, H=20.8 ~234m) from ARO Westfield (April 11.34-35p3)
K12F35R 2012 FR35 (arc=20 days, H=21.7 ~155m) from ARO Westfield (April 13.06-08p3)
K12F23Y 2012 FY23 (arc=22 days, H=20.0 ~339m) from LINEAR (April 13.36-38p3)
K12E14S 2012 ES14 (Q=4.228 AU, arc=31 days, H=20.1 ~323m) from ARO Westfield (April 13.10-11p4) and Wishing Star Obs. (April 14.04-05p3)
K12D75X 2012 DX75 (arc=39 days, H=20.3 ~295m) from Kourovskaya Obs. (March 29.84p1, 29.90p1 & 29.94p1)
K12D31G 2012 DG31 (arc=3 opp, H=20.1 ~323m) from ARO Westfield (April 12.33-34p3)
K12D00O 2012 DO (arc=57 days, H=20.2 ~309m) from Vicksburg Obs. (April 13.34-35p3)
K12A11A 2012 AA11 (arc=90 days, H=20.1 ~323m) from Kourovskaya Obs. (March 29.70p1, 29.78p1 & 29.86p1), Nonndorf Obs. (April 13.01p5), and ARO Westfield (April 13.08-09p8)
K11Y15V 2011 YV15 (Q=4.394 AU, arc=3 opp, H=17.2 ~1.23 km) from ARO Westfield (April 13.11-13p4)
K11SA2L 2011 SL102 (arc=3 opp, H=18.2 ~776m) from ARO Westfield (April 13.09-10p6)
K11Q48D 2011 QD48 (arc=2 opp, H=18.2 ~776m) from ARO Westfield (April 13.06-07p7) and Cordell-Lorenz Obs. (April 14.14-16p7)
K11M02B 2011 MB2 (arc=2 opp, H=20.0 ~339m) from Spacewatch 0.9m (April 13.45-48p3)
K09Q08E 2009 QE8 (arc=3 opp, H=18.1 ~812m) from PS1 (April 12.26-28p2)
K09K07M 2009 KM7 (arc=4 opp, H=17.8 ~933m) from PS1 (April 13.35-39p4)
K09K02L 2009 KL2 (arc=3 opp, H=18.0 ~851m) from Spacewatch 0.9m (April 13.22-25p3)
K08Q03T 2008 QT3 (arc=2 opp, H=18.8 ~589m) from PS1 (April 13.35-39p4)
K04V00B 2004 VB (arc=4 opp, H=20.8 ~234m) from ARO Westfield (April 10.38-39p3)
K04Q07J 2004 QJ7 (arc=3 opp, H=18.6 ~645m) from ARO Westfield (April 13.11-13p5)
K02G08K 2002 GK8 (i=39.0°, arc=3 opp, H=19.6 ~407m) from Spacewatch 0.9m (April 13.45-48p3)
J98K03N 1998 KN3 (q=0.195 AU, arc=3 opp, H=18.4 ~708m) from PS1 (April 12.29-31p2)
W0378 320378 2007 UR3 from PS1 (April 12.34-37p3)
V8450 318450 2005 EJ from the Catalina Sky Survey (CSS) (April 13.33-34p3)
V2473 312473 2008 SX245 from LINEAR (April 13.36-38p3)
U2830 302830 2003 FB from CSS (April 13.36-37p4)
O3025 243025 2006 UM216 from PS1 (April 13.34-37p3)
N8063 238063 2003 EG from PS1 (April 12.29-31p2)
86667 86667 2000 FO10 from LINEAR (April 13.36-38p3)
68346 68346 2001 KZ66 from PS1 (April 13.36-40p4)
10636 10636 1998 QK56 from Spacewatch 0.9m (April 13.27-31p3)
09400 9400 1994 TW1 from LINEAR (April 13.29-33p3)
07341 7341 1991 VK from PS1 (April 13.35-38p3)
06455 6455 1992 HE from CSS (April 13.27-28p4)
05587 5587 1990 SB from CSS (April 13.16-18p4) and LINEAR (April 13.28-31p3)
03352 3352 McAuliffe (1981 CW) from CSS (April 13.36-37p4)
02059 2059 Baboquivari (1963 UA) from PS1 (April 12.27-28p2)

Observers on 14 April '12

A total of 49 observers appeared in this day's MPECs.

Code	Observer / observatory
`A50`	Andrushivka Obs. in the Ukraine, 1 in MPEC 2012-G45 -- 237P
`H21`	Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2012-G39 & 2012-G46 -- 2012 GS5, 2012 FR35, 2012 FP62, 2012 ES14, 2012 DG31, 2012 AA11, 2011 YV15, 2011 SL102, 2011 QD48, 2004 VB, 2004 QJ7
`I47`	Auger Obs. in Argentina, 6 in MPEC 2012-G45 -- C/2011 L4, C/2011 A3, C/2010 G2, C/2009 F4, C/2006 S3, 29P
`069`	Baldone Obs. in Latvia, 1 in MPEC 2012-G45 -- C/2009 P1
`621`	Bergisch Gladbach Obs. in Germany, 1 in MPEC 2012-G45 -- 237P
`300`	Bisei Spaceguard Center in Japan, 1 in MPEC 2012-G46 -- 2012 GS5
`C86`	Blanes Obs. in Spain, 4 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1, 49P, 29P
`I99`	Blanquita Obs. in Spain, 3 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1, 49P
`I72`	Carpe-Noctem Obs., 2 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1
`160`	Castelmartini Obs. in Italy, 1 in MPEC 2012-G45 -- 237P
`703`	Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2012-G39 -- 318450, 302830, 6455, 5587, 3352
`J01`	Cielo Profundo Obs. in Spain, 7 in MPEC 2012-G45 -- C/2012 CH17, C/2012 A2, C/2011 F1, C/2009 P1, 237P, 49P, 29P
`850`	Cordell-Lorenz Obs. in Tennessee, 4 in MPECs 2012-G39 & 2012-G45 -- 2012 FG58, 2011 QD48, C/2009 P1, 49P
`I39`	Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-G45 -- 29P
`808`	El Leoncito Obs. in Argentina, 1 in MPEC 2012-G45 -- 29P
`F65%`	Tim Lister in southern California via Faulkes Telescope North in Hawaii, 4 in MPECs 2012-G40, 2012-G41, 2012-G43 & 2012-G47 -- 2012 GT5, 2012 GD5, 2012 GB5, 2012 GA5
`F657`	Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-G46 -- 2012 GS5
`C73`	Galati Obs. in Romania, 3 in MPEC 2012-G45 -- C/2012 CH17, 246P, 49P
`J95`	Great Shefford Obs. in England, 1 in MPEC 2012-G46 -- 2012 GS5
`585`	Kiev Comet Station in the Ukraine, 4 in MPEC 2012-G45 -- C/2012 A2, 164P, 117P, 49P
`168`	Kourovskaya Obs. in Russia, 4 in MPECs 2012-G39 & 2012-G45 -- 2012 EG5, 2012 DX75, C/2012 CH17, 2012 AA11
`D95`	Kurihara Obs. in Japan, 1 in MPEC 2012-G45 -- 78P
`704`	LINEAR in New Mexico, 10 in MPECs 2012-G39 & 2012-G45 -- 2012 GD2, 2012 GC2, 2012 FY23, C/2012 CH17, C/2011 J2, 86667, 312473, 9400, 5587, 49P
`232`	Masquefa Obs. in Spain, 3 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1, 78P
`5682`	David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2012-G42 & 2012-G44 -- 2012 GE5, 2012 GC5
`213`	Montcabre Obs. in Spain, 5 in MPEC 2012-G45 -- C/2012 BJ98, C/2012 B3, C/2011 F1, C/2009 P1, 78P
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2012-G45 -- C/2010 U3, 237P, 88P
`644`	NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-G45 -- 237P
`0892`	Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 6 in MPEC 2012-G45 -- C/2011 UF305, C/2010 S1, C/2006 S3, 246P, 49P, 29P
`C47`	Nonndorf Obs. in Austria, 9 in MPECs 2012-G39 & 2012-G45 -- C/2012 CH17, 2012 AA11, C/2011 UF305, C/2011 F1, C/2010 R1, C/2009 P1, 246P, 49P, 29P
`C23`	Olmen Obs. in Belgium, 8 in MPEC 2012-G45 -- C/2012 A2, C/2011 UF305, C/2011 F1, C/2010 S1, C/2009 P1, 246P, 49P, 29P
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 21 in MPECs 2012-G39, 2012-G40, 2012-G41, 2012-G42, 2012-G43, 2012-G44, 2012-G45, 2012-G46 & 2012-G47 -- 2012 GT5, 2012 GS5, 2012 GE5, 2012 GD5, 2012 GC5, 2012 GB5, 2012 GA5, P/2012 F5, C/2012 BJ98, 2009 QE8, 2009 KM7, 2008 QT3, 1998 KN3, 68346, 320378, 243025, 238063, 7341, 2059, 49P, 45P
`H23`	Pear Tree Obs. in Florida, 3 in MPEC 2012-G45 -- C/2012 CH17, 49P, 29P
H06`	E. Bryssinck via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-G45 -- C/2009 P1
`H06\|`	Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 21 in MPEC 2012-G45 -- C/2012 F6, C/2012 F3, C/2012 F1, C/2012 BJ98, P/2012 B1, C/2011 Y3, P/2011 Y2, C/2011 S2, C/2011 Q4, P/2011 N1, C/2011 F1, C/2007 D1, C/2005 L3, 255P, 240P, 182P, 171P, 152P, 117P, 60P, 29P
D90`	Kevin Hills in England via RAS Obs. Moorook in South Australia, 10 in MPEC 2012-G45 -- C/2012 CH17, C/2012 C1, C/2012 BJ98, C/2011 J2, C/2010 R1, C/2009 F4, 246P, 117P, 74P, 29P
`071`	Rhozen Obs. in Bulgaria, 3 in MPEC 2012-G45 -- C/2011 J2, C/2010 G2, 78P
`939`	Rodeno Obs. in Spain, 3 in MPEC 2012-G45 -- C/2011 F1, C/2009 P1, 78P
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2012-G46 -- 2012 GS5
`033`	Schwarzschild Obs. in Germany, 3 in MPEC 2012-G45 -- C/2012 F6, P/2012 F5, C/2012 E3
`G68`	Sierra Stars Obs. in northern California, 1 in MPEC 2012-G45 -- C/2009 P1
`691`	Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2012-G39 & 2012-G45 -- 2011 MB2, P/2011 C2, 2009 KL2, 2002 GK8, 10636
`291`	Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2012-G39, 2012-G40, 2012-G41, 2012-G43, 2012-G46 & 2012-G47 -- 2012 GT5, 2012 GS5, 2012 GD5, 2012 GB5, 2012 GA5, 2012 FM52, 2012 FG58, 2012 FB71
`I93`	St. Pardon de Conques Obs. in France, 1 in MPEC 2012-G46 -- 2012 GS5
`A71`	Stixendorf Obs. in Austria, 6 in MPEC 2012-G45 -- C/2012 CH17, C/2012 A2, C/2011 UF305, C/2011 F1, C/2009 P1, 246P
`926`	Tenagra II Obs. in Arizona, 1 in MPEC 2012-G46 -- 2012 GS5
`C35`	Terrassa Obs., 1 in MPEC 2012-G45 -- 246P
`H47`	Vicksburg Obs. in Mississippi, 7 in MPECs 2012-G39 & 2012-G45 -- 2012 DO, C/2010 R1, C/2006 S3, 246P, 164P, 49P, 29P
`B42`	Vitebsk Obs. in Belarus, 3 in MPEC 2012-G45 -- C/2012 B3, C/2011 F1, 49P
`C51`	WISE in Earth polar orbit, 1 in MPEC 2012-G45 -- 203P
`I15`	Wishing Star Obs. in Rhode Island, 1 in MPEC 2012-G39 -- 2012 ES14

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

Impact Risk Monitoring on 14 April '12

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2322 and JPL at 2321 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 GE5	JPL Sentry	2018	2049-2096	5	1.4e-07	-7.36	-7.44	0	JPL: "Analysis based on 6 observations spanning .89735 days (2012-Apr-12.35845 to 2012-Apr-13.255802)." Diameter approximately 0.020 km. from mean, weighted H=26.2.

2012 FB71	JPL Sentry	1710	R E M O V E D						JPL: Risk listing removed at 0849 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 14 April '12

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

0008 4/15	Grabbed MPEC 2012-G47 - 2012 GT5 - see above
2321	Grabbed MPEC 2012-G46 - 2012 GS5 - see above
2018	Noted that JPL Sentry has posted 2012 GE5 as an impact risk - see above Grabbed MPEC 2012-G45 - Observations and Orbits of Comets - see above
1825	Grabbed MPEC 2012-G42 - 2012 GC5 - see above Grabbed MPEC 2012-G43 - 2012 GD5 - see above Grabbed MPEC 2012-G44 - 2012 GE5 - see above
1712	Generated Traffic Report
1710	Noted that JPL Sentry has removed 2012 FB71 as an impact risk - see above Grabbed MPEC 2012-G39 - Daily Orbit Update - see above Grabbed MPEC 2012-G40 - 2012 GA5 - see above Grabbed MPEC 2012-G41 - 2012 GB5 - see above

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