Central Bureau for Astronomical Telegrams
IAUC 4078: 1985e
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Read IAUC 4079
Circular No. 4078
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
COMET MACHHOLZ (1985e)
Total visual magnitude estimates by D. Machholz (Loma Prieta,
CA, 0.25-m reflector): June 13.47 UT, 8.0; 15.47, 7.9; 18.47, 7.7;
19.48, 7.6. There was a 3' tail near p.a. 270P on June 13 and 15.
The following precise positions have been reported:
1985 UT R.A. (1950.0) Decl. Observer
June 6.74653 1 59 42.39 +19 54 35.3 Koishikawa
7.44149 2 05 30.77 +20 13 03.6 Bus
7.45260 2 05 36.58 +20 13 20.6 "
7.47903 2 05 49.94 +20 14 03.5 Gibson
7.48340 2 05 52.18 +20 14 10.6 "
8.48160 2 14 29.60 +20 40 05.1 "
8.48403 2 14 30.89 +20 40 08.8 "
13.45330 3 02 22.14 +22 31 56.9 Skiff
14.45538 3 13 01.75 +22 49 29.8 "
15.45573 3 24 00.25 +23 04 44.1 Bus
16.45191 3 35 15.76 +23 17 26.9 Skiff
16.45651 3 35 18.97 +23 17 31.6 "
17.45790 3 46 57.84 +23 27 34.9 Bus
M. Koishikawa (Sendai Observatory, Ayashi Station). Mean of three
exposures with telephoto lens (focal length 0.30 m). Reduced
by S. Kasahara. Communicated by S. Nakano.
S. J. Bus and B. A. Skiff (Lowell Observatory, Anderson Mesa
Station). 0.33-m photographic telescope. Measured by Bus.
J. Gibson (Palomar Observatory). 1.6-m reflector and CCD.
The following parabolic orbital elements have been derived by
S. Nakano from 22 observations May 28-June 17. Ephemeris
differences from IAUC 4071, 4072 and 4074 (q.v.) are minor.
T = 1985 June 28.7397 ETPeri. = 274.4998
Node = 194.7300 1950.0
q = 0.106289 AU Incl. = 16.2825
1985 ET R.A. (1950.0) Decl. p r m1
June 24 5 11.70 +23 12.8 1.084 0.248 5.1
July 4 7 55.51 +22 03.0 0.965 0.266 5.2
14 10 03.00 +20 32.2 0.823 0.589 8.3
24 11 53.20 +14 34.1 0.873 0.854 10.0
1985 June 20 (4078) Brian G. Marsden
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