Central Bureau for Astronomical Telegrams
IAUC 5246: 1991n; 1991T; N Her 1991; 1991j
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Circular No. 5246
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
PERIODIC COMET FAYE (1991n)
S. Nakano, Sumoto, Japan, reports the recovery of this comet by
T. Seki, Geisei, as given below. The comet has a small coma. The
indicated correction to the prediction on MPC 13042 (ephemeris on
MPC 17840) is Delta(T) = -0.01 day.
1991 UT R.A. (1950) Decl. m1
Apr. 16.79861 21 59 22.99 - 4 36 56.3 18.5
19.80816 22 04 06.88 - 4 08 44.5 18.0
SUPERNOVA 1991T IN NGC 4527
J. Menzies, South African Astronomical Observatory, telexes
photometry of SN 1991T made at SAAO, indicating the star's brightening
(cf. IAUC 5239): Apr. 17.96 UT, J = 11.73, H = 11.16, K = 10.93
(observer B. Carter); V = 12.4, B-V = +0.11, U-B = -0.71 (observer
C. Koen).
A. C. Gilmore reports the following photometry obtained with
the 0.6-m Cassegrain reflector at Mt. John University Observatory on
Apr. 21.52 UT: V = 11.84 +/- 0.01, U-B = -0.8 +/- 0.2, B-V = +0.10
+/- 0.01, V-R = +0.08 +/- 0.01.
Visual magnitude estimates: Apr. 17.01 UT, 12.5 (H. Dahle,
Oslo, Norway); 18.00, 12.3 (D. Rodriguez, Madrid, Spain; CCD); 18.84,
12.0 (J. Ripero, Madrid, Spain); 19.5, 12.5 (R. Evans, Hazelbrook,
N.S.W.); 19.99, 12.0 (S. Korth, Dusseldorf, Germany); 20.93, 11.9
(K. G. Andersson, Solna, Sweden); 21.94, 12.2 (M. Villi and G.
Cortini, Mt. Colombo-Forli, Italy).
NOVA HERCULIS 1991
R. D. Gehrz, G. Lawrence and C. Woodward, University of Minnesota,
provide further infrared magnitudes, obtained on Apr. 17.41 UT
with the bolometer on the 0.76-m telescope at the O'Brien Observatory,
using a 20" beam: J [6.7, H = 6.3, K = 4.6, L = 2.7, M = 2.0,
[8.7 microns] = 1.7 +/- 0.4, [10.6 microns] = 0.8 +/- 0.2.
PERIODIC COMET HARTLEY 1 (1991j)
Total visual magnitude estimates: Apr. 16.68 UT, 13.9 (A.
Pearce, Dowerin, W.A., 0.41-m reflector); 18.32, 14.1 (A. Hale, Las
Cruces, NM, 0.41-m reflector).
1991 April 22 (5246) Daniel W. E. Green
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