Central Bureau for Astronomical Telegrams
IAUC 5231: N Cen 1991; 1990c
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 5232
Circular No. 5231
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
NOVA CENTAURI 1991
N. Suntzeff, Cerro Tololo Interamerican Observatory, reports
that a CCD spectrogram obtained by M. Hamuy at the CTIO 1.5-m
telescope on Apr. 3.085 UT confirms that the object reported by Liller
(cf. IAUC 5230) is a nova. The red spectrum shows prominent lines
(in decreasing intensity) of H-alpha, O I (777.3, 844.6, 926.4 nm),
N I (821.2, 869.2, 905.0, 939.5, 1011.7 nm), C I (908.8, 940.6 nm),
[N I] (1040.4 nm), and possibly [Fe II]. H-alpha, at the resolution
of the spectrum (1.6 nm), is barely resolved at width 2.1 nm.
R. H. McNaught, University of Adelaide, reports the following
precise position measured from an Uppsala Southern Schmidt telescope
film: R.A. = 13h46m37s.13, Decl. = -62 54'00".0 (equinox 1950.0).
This position represents an empty field on the SERC J, R, and I and
ESO B and R surveys, indicating a magnitude at quiescence of fainter
than mpg = 22.5. The nearest star on the surveys is of mag 19 with
end figures 37s.38, 53'57".7. No nearby star shows any noticable
proper motion by intercomparison of the 9 survey films examined.
Field stars measured on the Uppsala nova film and the 1976 U.K.
Schmidt Telescope photograph agree to 0".3. A nearby star of
similar brightness has end figures 39s.94, 53'52".2.
COMET LEVY (1990c)
Ephemeris from orbital elements on MPC 17596:
1991 ET R.A. (1950) Decl. Delta r m1
Apr. 14 8 15.66 +12 05.2 2.396 2.758 11.3
24 8 15.03 +14 04.4
May 4 8 16.68 +15 32.7 2.992 2.994 12.1
14 8 20.00 +16 38.2
24 8 24.54 +17 26.7 3.564 3.224 12.8
June 3 8 29.97 +18 02.3
13 8 36.03 +18 27.9 4.082 3.450 13.4
23 8 42.53 +18 45.9
July 3 8 49.29 +18 58.2 4.521 3.672 13.9
Total visual magnitude estimate by A. Pereira, Cabo da Roca,
Portugal (0.15-m reflector): Apr. 1.86 UT, 10.3.
1991 April 3 (5231) Daniel W. E. Green
Read IAUC 5232
Our Web policy. Index to the CBAT/MPC/ICQ pages.
