M.P.E.C. 2012-H17 Issued 2012 Apr. 17, 18:14 UT The Minor Planet Electronic Circulars contain information on unusual minor planets and routine data on comets. They are published on behalf of Commission 20 of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Prepared using the Tamkin Foundation Computer Network MPC@CFA.HARVARD.EDU URL http://www.minorplanetcenter.net/ ISSN 1523-6714 COMET P/2012 G1 (PANSTARRS) Observations: PK12G010 C2012 04 13.35047 12 04 33.746-20 51 01.43 21.1 TLEH017F51 PK12G010 C2012 04 13.36369 12 04 33.295-20 50 57.14 20.9 TLEH017F51 PK12G010 C2012 04 13.37693 12 04 32.851-20 50 52.75 21.0 TLEH017F51 PK12G010 C2012 04 13.39016 12 04 32.397-20 50 48.53 21.0 TLEH017F51 PK12G010 C2012 04 14.10070112 04 10.019-20 46 49.97 20.4 TtEH017I33 PK12G010 C2012 04 14.10217112 04 09.984-20 46 49.13 20.2 TtEH017I33 PK12G010 C2012 04 14.10373412 04 09.920-20 46 48.64 20.3 TtEH017I33 PK12G010 |C2012 04 14.32726 12 04 02.69 -20 45 39.4 cEH017H06 PK12G010 |C2012 04 14.33089 12 04 02.52 -20 45 38.4 19.9 TcEH017H06 PK12G010 HC2012 04 16.28202 12 03 04.01 -20 34 38.2 oEH017291 PK12G010 HC2012 04 16.28634 12 03 03.88 -20 34 36.4 oEH017291 PK12G010 HC2012 04 16.29063 12 03 03.78 -20 34 35.2 oEH017291 PK12G010 $C2012 04 16.39881 12 03 00.62 -20 33 58.4 19.8 ToEH017F65 PK12G010 $C2012 04 16.40007 12 03 00.60 -20 33 57.3 20.0 ToEH017F65 PK12G010 7C2012 04 16.44232 12 02 59.27 -20 33 43.6 tEH017F65 PK12G010 7C2012 04 16.45121 12 02 58.96 -20 33 39.9 20.0 TtEH017F65 Observer details: 291 LPL/Spacewatch II. Observer J. V. Scotti. 1.8-m f/2.7 reflector + CCD. F51 Pan-STARRS 1, Haleakala. Observers N. Primak, A. Schultz, S. Watters, J. Thiel, T. Goggia. Measurer PS1 Science Consortium. 1.8-m Ritchey-Chretien + CCD. F65 Haleakala-Faulkes Telescope North. Observers K. Rochowicz, G. Sostero, E. Guido, N. Howes, P. Miller, P. Roche, A. Tripp, R. Miles, R. Holmes, S. Foglia, L. Buzzi. Measurers K. Rochowicz, G. Sostero, E. Guido, N. Howes, L. Buzzi, S. Foglia. 2.0-m f/10 Ritchey-Chretien + CCD, 2.0-m f/10.0 Ritchey-Chretien + CCD. H06 RAS Observatory, Mayhill. Observer H. Sato. 0.51-m f/6.8 astrograph + CCD + f/4.5 focal reducer. I33 SOAR, Cerro Pachon. Observer H. Hsieh. Measurer M. Micheli. 4.1-m reflector + CCD. Orbital elements: P/2012 G1 (PANSTARRS) T 2012 June 1.43253 TT MPC q 2.5841656 (2000.0) P Q n 0.11562497 Peri. 286.11485 -0.85803133 +0.47397143 a 4.1728711 Node 282.54401 -0.35860043 -0.82860500 e 0.3807224 Incl. 11.69249 -0.36767917 -0.29793428 P 8.52 From 16 observations 2012 Apr. 13-16. Ephemeris: P/2012 G1 (PANSTARRS) Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2 2012 03 18 12 21 29.2 -22 19 17 1.6926 2.6314 155.6 9.0 20.3 ... 2012 04 02 12 11 26.9 -21 44 39 1.6484 2.6146 161.2 7.1 20.3 ... 2012 04 10 12 06 26.1 -21 08 38 1.6478 2.6072 158.8 8.0 20.2 ... 2012 04 16 12 03 12.3 -20 36 11 1.6576 2.6022 155.1 9.4 20.3 2012 04 17 12 02 43.5 -20 30 27 1.6601 2.6015 154.3 9.6 20.3 2012 04 18 12 02 15.9 -20 24 39 1.6628 2.6007 153.6 9.9 20.3 ... 2012 04 24 11 59 55.4 -19 48 51 1.6838 2.5966 148.7 11.6 20.3 ... 2012 05 02 11 58 04.8 -19 00 43 1.7238 2.5920 141.8 13.9 20.3 ... 2012 05 17 11 58 55.3 -17 40 17 1.8304 2.5862 128.7 17.8 20.4 Gareth V. Williams (C) Copyright 2012 MPC M.P.E.C. 2012-H17