Central Bureau for Astronomical Telegrams
IAUC 6225: C/1995 O1; C/1995 Q1
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Circular No. 6225
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)
COMET C/1995 O1 (HALE-BOPP)
J. Davies and T. Geballe, Joint Astronomy Centre, Hilo; D.
Cruikshank, NASA Ames Research Center; T. Owen, Institute for
Astronomy, University of Hawaii; and C. de Bergh, Observatoire de
Paris, Meudon, report the detection with the U.K. Infrared
Telescope during Sept. 4-9 UT of a shallow absorption feature
centered at about 2.04 microns in the spectrum of this comet. The
feature has a width of 0.2 micron and a depth of about 8 percent
and is tentatively attributed to water ice. No other spectral
features were detected in the wavelength range 1.0-2.5 microns. An
upper limit of 10E-16 W/m**2 was determined (in an aperture of size
1".2 x 4".8, east-west by north-south) for the 3.3- to 3.5-micron
cometary emission feature.
COMET C/1995 Q1 (BRADFIELD)
Ephemeris from orbital elements on MPC 25623:
1995 TT R. A. (2000) Decl. Delta r Elong. Phase m1
Sept.20 11 12.31 +14 30.1 1.562 0.656 15.8 24.6 7.1
25 11 11.34 +17 45.1 1.561 0.745 22.7 31.3 7.7
30 11 10.71 +20 55.0 1.547 0.836 29.5 36.1 8.2
Oct. 5 11 10.30 +24 05.2 1.522 0.928 36.2 39.6 8.6
10 11 09.98 +27 20.9 1.490 1.019 43.0 41.9 8.9
15 11 09.59 +30 46.5 1.451 1.110 49.8 43.3 9.3
20 11 08.93 +34 26.7 1.410 1.199 56.7 44.0 9.5
25 11 07.77 +38 25.3 1.366 1.287 63.8 43.9 9.8
30 11 05.75 +42 45.9 1.323 1.374 71.1 43.2 10.0
Nov. 4 11 02.37 +47 30.7 1.284 1.459 78.6 41.8 10.2
9 10 56.84 +52 40.2 1.250 1.542 86.2 39.9 10.4
14 10 47.80 +58 11.7 1.225 1.624 93.8 37.4 10.5
19 10 32.69 +63 57.9 1.210 1.705 101.3 34.6 10.7
24 10 06.32 +69 44.0 1.209 1.785 108.3 31.7 10.9
29 9 17.5 +75 00.8 1.224 1.864 114.5 28.8 11.1
Dec. 4 7 46.5 +78 47.8 1.255 1.941 119.5 26.2 11.4
9 5 36.8 +79 32.1 1.303 2.017 123.1 24.1 11.6
14 3 53.9 +77 10.4 1.367 2.093 124.9 22.7 11.9
19 2 57.5 +73 27.5 1.446 2.167 125.1 21.8 12.2
24 2 27.69 +69 31.5 1.538 2.240 123.8 21.4 12.4
29 2 11.30 +65 48.3 1.642 2.313 121.4 21.3 12.7
1995 September 11 (6225) Daniel W. E. Green
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