Circular No. 6093

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)

Phone 617-495-7244/7440/7444 TWX 710-320-6842 ASTROGRAM CAM MARSDEN@CFA.HARVARD.EDU or GREEN@CFA.HARVARD.EDU (science)

COMET MACHHOLZ (1994r)

J. Tichá, Kleť Observatory, communicates further precise positions, obtained by Z. Moravec and M. Tichý with the 0.57-m f/5.2 reflector + CCD + R filter. She notes that the Kleť observations on IAUC 6091 should be ignored. The comet has a 0′.5 coma and a 1′ tail to the north-northwest.

1994 UT  α_{2000}  δ_{2000}  m_{1}
Oct. 11.14591  8^{h}36^{m}41.^{s}38  +55^{o}13′04′′.3  13.2
11.16057  8 36 39.60  +55 13 00.5
11.17608  8 36 37.72  +55 12 56.3
11.72498  8 35 31.28  +55 10 18.2
11.72706  8 35 31.04  +55 10 17.6
11.73128  8 35 30.54  +55 10 16.6

Parabolic orbital elements, by the undersigned, from 10 observations Oct. 9–11:

T = 1994 Oct. 5.574 TT  ω = 144.^{o}449
Ω = 249.603 }2000.0
q = 1.83977 AU  i = 102.027
1994TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  m_{1}
Oct. 5 8^{h}47.^{m}25 +55^{o}41.^{′}7 1.785 1.840 77.^{o}0 32.^{o}0 11.9
10 8 38.90 +55 18.4 1.694 1.841  81.9 32.5 11.8
15 8 28.35 +54 54.8 1.601 1.844  87.2 32.7 11.7
20 8 15.18 +54 28.3 1.507 1.849  93.0 32.5 11.6
25 7 58.96 +53 54.7 1.414 1.856  99.4 31.9 11.4
30 7 39.28 +53 07.9 1.323 1.866 106.4 30.7 11.3
Nov. 4 7 15.92 +51 59.1 1.238 1.877 114.2 28.8 11.2
9 6 49.08 +50 17.3 1.160 1.891 122.9 26.1 11.1
14 6 19.52 +47 50.4 1.093 1.906 132.5 22.5 11.0
19 5 48.66 +44 29.0 1.041 1.923 142.8 18.1 10.9
24 5 18.23 +40 11.3 1.007 1.943 153.9 12.9 10.9
29 4 49.88 +35 06.2 0.995 1.964 164.7  7.6 10.9
Dec. 4 4 24.73 +29 33.3 1.006 1.986 171.8  4.1 11.0
9 4 03.30 +23 57.3 1.040 2.010 166.4  6.6 11.1
14 3 45.61 +18 39.9 1.095 2.036 156.5 11.1 11.3

1994 October 11 Brian G. Marsden