Circular No. 8320

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.

IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science)

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COMET C/2004 F4 (BRADFIELD) Ephemeris from orbital elements on IAUC 8319 (H = 8.0, n = 3):

2004TT α_{2000} δ_{2000} Δ r ϵ β Mag.
Apr. 5 2^{h}05.^{m}53 − 1^{o}44.^{′}5 1.288 0.469 18.^{o}8 43.^{o}4  6.1
7 2 07.42 − 1 40.8 1.227 0.412 17.9  48.3  5.6
9 2 08.68 − 1 29.6 1.159 0.353 16.9  55.4  4.9
11 2 08.75 − 1 03.7 1.085 0.294 15.5  66.0  4.2
13 2 06.59 − 0 07.6 1.005 0.238 13.6  82.6  3.3
15 2 00.31 + 1 51.7 0.923 0.191 10.3 109.6  2.4
17 1 48.03 + 5 43.1 0.856 0.169  5.1 148.4  1.9
19 1 32.28 +11 17.5 0.830 0.186  4.0 157.8  2.1
21 1 18.89 +16 57.2 0.845 0.231 10.3 128.6  2.9
23 1 09.74 +21 44.3 0.882 0.287 15.8 107.3  3.7
25 1 04.02 +25 36.7 0.929 0.346 20.1  92.6  4.4
27 1 00.66 +28 46.2 0.980 0.404 23.4  82.0  5.0
29 0 58.90 +31 23.7 1.031 0.462 26.2  74.1  5.6
May 1 0 58.23 +33 37.4 1.081 0.518 28.5  67.9  6.0
3 0 58.32 +35 33.3 1.130 0.573 30.4  63.0  6.5
5 0 58.93 +37 15.3 1.177 0.626 32.1  58.9  6.8

SUPERNOVA 2004bh IN UGC 5161 Further to IAUC 8317, M. Armstrong reports his discovery of an ap-

parent supernova on unfiltered CCD images taken on Apr. 6.906 (poor image), 9.963 (mag ∼ 16.9), and 11.063 UT (mag ∼ 17.0) with a 0.35m reflector. SN 2004bh is located at α = 9^{h}40^{m}56^{s}.47, δ = +27^{o}46′46′′.6 (equinox 2000.0), which is ≈ 1′′.3 west and 6′′ north of the center of UGC 5161. Nothing was visible at this position on Armstrong’s images taken on 2003 Nov. 12 (limiting mag 18.0), and 2004 Feb. 26 (limiting mag 18.5), or on Palomar Sky survey red and blue plates. M. Mobberley, Cockfield, U.K., also obtained an unfiltered CCD image of SN 2004bh at mag 17 on Apr. 10.873 (position end figures 56^{s}.40, 47′′.5).

COMET C/2002 T7 (LINEAR) Visual total-magnitude estimates in twilight: Apr. 9.36 UT, 4.6: (A.

Amorim, Florianopolis, Brazil, 20×80 binoculars); 10.89, 5.0 (A. Pearce, Kalgoorlie, W. Australia, 20×80 binoculars); 11.88, 4.9 (Pearce).

2004 April 12  \begin{matrix}c \\ ◯ \end{matrix} Copyright 2004 CBAT  Daniel W. E. Green