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THE ASTRONOMER Electronic Circular No 908 1994 Dec 22 21.26UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP,England. Telephone/FAX(0256)471074 Int:+44256471074
INTERNET: GMH at AST.STAR.RL.AC.UK or GMH at GXVG.AST.CAM.AC.UK
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PERIODIC COMET McNAUGHT-RUSSELL (1994u)
Robert H. McNaught reports his discovery of a comet on a plate
taken by Kenneth S. Russell. The following observations are
available:
1994 UT R.A. (2000) Decl. m1 Observer
Dec. 12.68490 7 13 15.39 -24 42 42.8 17.5 Russell
12.71962 7 13 13.45 -24 43 04.2 "
14.59184 7 11 19.85 -25 04 02.5 16.9 Kojima
14.60065 7 11 19.25 -25 04 10.2 "
14.60913 7 11 18.72 -25 04 13.2 "
14.67951 7 11 14.25 -25 04 57.8 16.8 "
K. S. Russell (Siding Spring). U.K. Schmidt Telescope R plate.
Coma diameter about 0'.1 with strong central condensation and a
short tail. Dense star field. Measured by McNaught.
T. Kojima (YGCO Chiyoda Observatory). 0.25-m f/6 reflector + CCD.
Moonlight and bad seeing; comet low in the sky. Communicated by
S. Nakano, Sumoto.
IAUC 6115
Elliptical orbital elements from 17 observations Dec. 12-19:
T = 1994 Sept. 6.150 TT Peri. = 171.283
e = 0.79166 Node = 217.470 2000.0
q = 1.28378 AU Incl. = 28.988
a = 6.16206 AU n = 0.064434 P = 15.30 years
1994/95 R. A. (2000) Decl. Delta r Elong. Phase m1
Dec. 14 7 11.93 -24 57.6 1.054 1.810 125.3 26.4 16.2
19 7 06.66 -25 42.9 1.084 1.853 127.2 25.0 16.4
24 7 01.18 -26 10.3 1.118 1.896 128.8 23.8 16.5
29 6 55.69 -26 20.6 1.155 1.939 130.0 22.8 16.7
Jan. 3 6 50.41 -26 15.0 1.195 1.983 130.9 22.0 16.9
8 6 45.52 -25 54.9 1.239 2.027 131.2 21.4 17.0
13 6 41.19 -25 22.3 1.288 2.072 131.2 20.9 17.2
18 6 37.50 -24 39.3 1.340 2.116 130.6 20.7 17.4
23 6 34.55 -23 47.7 1.396 2.161 129.7 20.5 17.6
28 6 32.35 -22 49.5 1.455 2.206 128.3 20.5 17.8
IAUC 6117
PERIODIC COMET BORRELLY (1994l)
Daily ephemeris by G.Hurst using EPH.EXE by N.James to assist in
observation of this favourably-placed comet:
m = 4.5 + 5.0 log R + 25.0 log r
Date R.A. (2000) Dec. R r Elong Mag. Motion
h m o ' (AU) (AU) o "/hr P.A.
1994 Dec
22.00 9 38.09 +52 58.2 0.648 1.483 129.6 7.8 109 18
23.00 9 39.56 +53 39.4 0.651 1.488 129.9 7.9 107 17
24.00 9 40.96 +54 19.7 0.655 1.492 130.1 7.9 104 17
25.00 9 42.30 +54 59.4 0.659 1.497 130.4 8.0 102 16
26.00 9 43.56 +55 38.2 0.663 1.501 130.6 8.0 100 15
27.00 9 44.75 +56 16.2 0.667 1.506 130.7 8.1 97 14
28.00 9 45.87 +56 53.5 0.671 1.511 130.9 8.1 95 14
29.00 9 46.91 +57 29.9 0.676 1.515 131.1 8.2 92 13
30.00 9 47.87 +58 5.4 0.680 1.520 131.2 8.2 90 12
31.00 9 48.74 +58 40.0 0.685 1.525 131.3 8.3 87 11
1995 Jan
1.00 9 49.54 +59 13.8 0.690 1.530 131.4 8.3 85 10
2.00 9 50.25 +59 46.7 0.696 1.535 131.5 8.4 82 9
3.00 9 50.87 +60 18.7 0.701 1.540 131.6 8.4 80 8
4.00 9 51.41 +60 49.7 0.706 1.546 131.6 8.5 77 7
Guy M Hurst