MPEC 2002-C111: COMET C/2002 C1 (IKEYA-ZHANG)
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M.P.E.C. 2002-C111 Issued 2002 Feb. 15, 23:23 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://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
COMET C/2002 C1 (IKEYA-ZHANG)
Observations:
CK02C010 2002 02 04.42083 00 13 58.10 -16 08 56.3 8.2 T 372
CK02C010 C2002 02 06.39340 00 17 21.96 -15 07 32.8 8.9 T 341
CK02C010 C2002 02 06.39965 00 17 22.59 -15 07 20.9 341
CK02C010 C2002 02 06.40145 00 17 22.79 -15 07 17.6 9.6 T 402
CK02C010 C2002 02 06.40242 00 17 22.85 -15 07 15.5 8.8 T 867
CK02C010 C2002 02 06.40316 00 17 22.98 -15 07 14.1 402
CK02C010 C2002 02 06.40487 00 17 23.14 -15 07 11.0 402
CK02C010 C2002 02 06.40521 00 17 23.18 -15 07 10.2 341
CK02C010 C2002 02 06.40764 00 17 23.41 -15 07 05.5 867
CK02C010 C2002 02 06.41076 00 17 23.76 -15 06 59.7 341
CK02C010 C2002 02 06.41632 00 17 24.33 -15 06 49.5 341
CK02C010 C2002 02 07.41924 00 19 10.18 -14 34 43.5 9.9 T 300
CK02C010 C2002 02 07.41972 00 19 10.25 -14 34 42.3 300
CK02C010 C2002 02 07.42078 00 19 10.36 -14 34 41.0 300
CK02C010 C2002 02 07.42174 00 19 10.45 -14 34 39.2 300
CK02C010 C2002 02 07.42221 00 19 10.50 -14 34 37.6 300
CK02C010 C2002 02 07.42508 00 19 10.79 -14 34 32.0 300
CK02C010 C2002 02 08.76664 00 21 34.65 -13 50 39.2 9.7 T 620
CK02C010 C2002 02 08.78039 00 21 36.05 -13 50 12.9 12.2 N 620
CK02C010 C2002 02 08.78648 00 21 36.67 -13 50 00.9 620
CK02C010 C2002 02 09.38391 00 22 41.43 -13 30 07.5 347
CK02C010 C2002 02 09.38804 00 22 41.90 -13 29 58.8 347
CK02C010 C2002 02 09.38978 00 22 42.07 -13 29 55.6 347
CK02C010 C2002 02 09.39171 00 22 42.28 -13 29 51.4 347
CK02C010 C2002 02 09.39403 00 22 42.53 -13 29 47.3 8.8 T 349
CK02C010 C2002 02 09.39501 00 22 42.63 -13 29 45.2 349
CK02C010 C2002 02 09.39596 00 22 42.73 -13 29 43.2 349
CK02C010 C2002 02 09.39774 00 22 42.92 -13 29 39.8 349
CK02C010 C2002 02 09.42958 00 22 46.36 -13 28 35.4 10.6 T 340
CK02C010 C2002 02 09.43130 00 22 46.55 -13 28 31.9 340
CK02C010 C2002 02 09.43279 00 22 46.69 -13 28 29.0 340
CK02C010 C2002 02 09.43404 00 22 46.86 -13 28 26.3 340
CK02C010 C2002 02 09.74192 00 23 20.52 -13 18 05.7 11.0 N 162
CK02C010 C2002 02 09.75910 00 23 22.50 -13 17 31.1 11.1 N 162
CK02C010 C2002 02 10.39581 00 24 32.21 -12 55 47.7 428
CK02C010 C2002 02 10.40759 00 24 33.58 -12 55 29.6 8.8 T 349
CK02C010 C2002 02 10.40837 00 24 33.67 -12 55 27.8 349
CK02C010 C2002 02 10.40919 00 24 33.77 -12 55 26.3 349
CK02C010 C2002 02 10.41113 00 24 33.97 -12 55 22.2 349
CK02C010 C2002 02 10.74069 00 25 10.43 -12 44 03.4 235
CK02C010 C2002 02 10.76396 00 25 13.00 -12 43 16.5 9.2 T 620
CK02C010 C2002 02 10.76881 00 25 13.54 -12 43 06.6 11.6 N 620
CK02C010 C2002 02 10.78580 00 25 15.41 -12 42 31.7 620
CK02C010 C2002 02 11.38935 00 26 22.41 -12 21 31.5 428
CK02C010 C2002 02 11.39250 00 26 22.74 -12 21 24.9 428
CK02C010 C2002 02 11.39323 00 26 22.85 -12 21 23.3 428
CK02C010 2002 02 11.42319 00 26 26.21 -12 20 27.0 7.0 T 372
CK02C010 2002 02 11.43941 00 26 28.02 -12 19 53.5 372
CK02C010 C2002 02 11.75113 00 27 03.01 -12 08 59.7 201
CK02C010 C2002 02 11.75467 00 27 03.32 -12 08 52.5 201
CK02C010 C2002 02 11.75786 00 27 03.76 -12 08 45.4 201
CK02C010 C2002 02 12.39219 00 28 14.92 -11 46 14.5 11.5 N 428
CK02C010 C2002 02 12.39317 00 28 15.04 -11 46 12.6 8.6 T 428
CK02C010 2002 02 12.41493 00 28 17.55 -11 45 31.7 6.7 T 372
CK02C010 2002 02 12.43281 00 28 19.53 -11 44 54.1 372
CK02C010 C2002 02 12.74101 00 28 54.51 -11 33 53.5 11.0 N 162
CK02C010 C2002 02 12.75285 00 28 55.82 -11 33 27.9 11.0 N 162
CK02C010 C2002 02 13.75058 00 30 49.49 -10 57 25.9 201
CK02C010 C2002 02 13.75795 00 30 50.32 -10 57 09.6 201
CK02C010 C2002 02 13.76597 00 30 51.25 -10 56 51.8 201
CK02C010 C2002 02 14.74331 00 32 43.74 -10 20 48.9 11.1 T 636
CK02C010 C2002 02 14.74818 00 32 44.33 -10 20 37.5 11.0 T 636
CK02C010 C2002 02 14.75066 00 32 44.66 -10 20 32.7 11.0 T 636
CK02C010 C2002 02 14.75303 00 32 44.92 -10 20 26.6 11.0 T 636
Observer details:
162 Potenza. Observer A. M. Giambersio. 0.20-m f/6.3 reflector + CCD.
201 Jonathan B. Postel Observatory. Observer V. Pozzoli. 0.30-m f/10
reflector + CCD.
235 CAST Observatory, Talmassons. Observer R. Ligustri. 0.35-m f/3.5
reflector + CCD.
300 Bisei Spaceguard Center--BATTeRS. Observers A. Asami, D. J. Asher,
T. Fuse, N. Hashimoto, A. I. Ibrahim, S. Isobe, K. Nishiyama, Y. Oshima,
J. Terazono, H. Umehara, T. Urata, M. Yoshikawa. 0.25-m f/5.0 reflector
+ CCD.
340 Toyonaka. Observer Y. Ezaki. 0.3-m f/6.0 reflector + CCD.
341 Akashina. Observer A. Akahori. 0.4-m f/6.0 reflector + CCD.
347 Utsunomiya-Imaizumi. Observer M. Suzuki. 0.25-m f/6.3 Schmidt-Cassegrain
+ CCD.
349 Ageo. Observer K. Kadota. 0.18-m f/5.5 reflector + CCD.
372 Geisei. Observer T. Seki. 0.60-m f/3.5 reflector.
402 Dynic Astronomical Observatory. Observer A. Sugie. 0.60-m f/3.7 reflector
+ CCD.
428 Reedy Creek. Observer J. Broughton. 0.25-m f/6.3 Schmidt-Cassegrain
+ CCD.
620 Observatorio Astronomico de Mallorca. Observers J. Rodriguez, S. Sanchez.
0.30-m f/3.3 Schmidt-Cassegrain + CCD.
636 Essen. Observer T. Payer. 0.32-m f/5.7 reflector + CCD.
867 Saji Observatory. Observers M. Yamanishi, A. Miyamoto, M. Aimoto,
T. Oribe. 1.03-m f/4.8 reflector + CCD.
Orbital elements:
C/2002 C1 (Ikeya-Zhang)
T 2002 Mar. 18.9388 TT MPC
q 0.507200 (2000.0) P Q
z +0.017337 Peri. 34.5777 -0.5487411 -0.6911291
Node 93.4156 +0.6203432 -0.7137825
e 0.991207 Incl. 28.1110 +0.5604083 +0.1133801
From 188 observations 2002 Feb. 1-14.
Ephemeris:
C/2002 C1 (Ikeya-Zhang)
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2
2002 02 15 00 33.23 -10 11.2 1.388 0.881 39.2 45.1 7.7
2002 02 17 00 37.13 -08 54.6 1.359 0.848 38.4 46.4 7.5
2002 02 19 00 41.10 -07 34.6 1.329 0.815 37.7 47.9 7.2
2002 02 21 00 45.13 -06 11.0 1.298 0.782 37.0 49.5 7.0
2002 02 23 00 49.21 -04 43.5 1.266 0.750 36.3 51.4 6.8
2002 02 25 00 53.31 -03 11.7 1.233 0.719 35.7 53.4 6.5
2002 02 27 00 57.41 -01 35.4 1.199 0.688 35.0 55.7 6.3
2002 03 01 01 01.48 +00 05.7 1.164 0.659 34.5 58.3 6.0
2002 03 03 01 05.48 +01 52.1 1.127 0.631 33.9 61.1 5.8
2002 03 05 01 09.37 +03 43.9 1.090 0.605 33.4 64.3 5.5
2002 03 07 01 13.09 +05 41.4 1.053 0.581 32.9 67.9 5.3
2002 03 09 01 16.56 +07 44.8 1.014 0.560 32.4 71.7 5.0
2002 03 11 01 19.69 +09 54.1 0.975 0.542 31.9 75.9 4.8
2002 03 13 01 22.38 +12 09.4 0.935 0.527 31.5 80.4 4.6
2002 03 15 01 24.53 +14 30.3 0.895 0.516 31.1 85.1 4.4
2002 03 17 01 26.01 +16 56.5 0.855 0.509 30.8 89.9 4.2
2002 03 19 01 26.71 +19 27.3 0.816 0.507 30.5 94.7 4.1
2002 03 21 01 26.52 +22 02.1 0.778 0.510 30.3 99.2 4.0
2002 03 23 01 25.35 +24 40.1 0.742 0.516 30.3 103.3 4.0
2002 03 25 01 23.10 +27 20.5 0.706 0.528 30.4 106.9 4.0
2002 03 27 01 19.72 +30 02.6 0.673 0.543 30.8 109.8 4.0
2002 03 29 01 15.13 +32 45.6 0.642 0.561 31.4 112.0 4.0
2002 03 31 01 09.27 +35 28.9 0.613 0.582 32.4 113.4 4.1
2002 04 02 01 02.06 +38 12.0 0.586 0.606 33.7 113.9 4.2
2002 04 04 00 53.40 +40 54.3 0.560 0.633 35.4 113.8 4.3
2002 04 06 00 43.14 +43 35.2 0.537 0.661 37.5 112.9 4.4
2002 04 08 00 31.11 +46 13.9 0.516 0.690 39.9 111.4 4.5
2002 04 10 00 17.05 +48 49.3 0.497 0.720 42.7 109.4 4.6
2002 04 12 00 00.66 +51 19.7 0.480 0.752 45.9 106.9 4.7
2002 04 14 23 41.58 +53 42.9 0.464 0.784 49.3 104.0 4.8
2002 04 16 23 19.41 +55 55.8 0.450 0.817 53.1 100.8 4.9
2002 04 18 22 53.78 +57 54.2 0.438 0.850 57.1 97.2 5.0
2002 04 20 22 24.47 +59 32.8 0.428 0.883 61.4 93.5 5.1
2002 04 22 21 51.61 +60 45.6 0.419 0.917 65.8 89.5 5.2
2002 04 24 21 15.85 +61 26.4 0.413 0.951 70.5 85.4 5.4
2002 04 26 20 38.46 +61 30.5 0.408 0.985 75.2 81.1 5.5
2002 04 28 20 01.11 +60 55.6 0.405 1.019 80.1 76.8 5.6
2002 04 30 19 25.48 +59 43.1 0.405 1.053 85.0 72.4 5.8
2002 05 02 18 52.84 +57 57.0 0.407 1.086 90.0 68.0 5.9
2002 05 04 18 23.81 +55 43.6 0.411 1.120 94.9 63.7 6.1
2002 05 06 17 58.52 +53 09.7 0.417 1.154 99.6 59.5 6.2
A parabolic orbit no longer adequately fits the observations, and a
revolution period of 400-500 years is likely. There is a possibility that
the comet is identical with C/1532 R1, as first suggested by S. Nakano
on the basis of observations through Feb. 10.4.
Brian G. Marsden (C) Copyright 2002 MPC M.P.E.C. 2002-C111
Read MPEC 2002-C110
Read MPEC 2002-C112
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