Central Bureau for Astronomical Telegrams
IAUC 3998: 1984q; N Sgr 1984; NSV 2229
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Read IAUC 3999
Circular No. 3998
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
COMET SHOEMAKER (1984q)
Further positions have been reported as follows:
1984 UT R.A. (1950.0) Decl. Observer
Oct. 4.1695 23 06.85 +18 13.2 Gibson
5.17049 23 05 44.36 +18 22 59.3 Tatum
J. Gibson (Palomar). 1.2-m Schmidt.
J. B. Tatum (University of Victoria). 0.25-m f/2 Schmidt.
The following parabolic orbital elements are based on the
three accurate positions. The comet may be a short-period one.
T = 1984 June 30.87 ET Peri. = 343.36
Node = 345.06 1950.0
q = 2.1959 AU Incl. = 39.75
1984 ET R.A. (1950.0) Decl. p r m1
Oct. 2 23 09.36 +17 51.9
7 23 03.78 +18 39.7 1.546 2.468 12.9
12 22 58.99 +19 21.1
17 22 55.02 +19 56.9 1.661 2.522 13.1
22 22 51.91 +20 28.2
27 22 49.67 +20 56.0 1.797 2.578 13.4
NOVA SAGITTARII 1984
W. Liller, Vina del Mar, Chile, provides the following revised
and new approximate visual magnitude estimates: Sept. 25.02
UT, 10.3; 25.99, 9.7; 27.00, 10.5; 29.01, 10.6; Oct. 3.02, 10.6.
H. Pedersen, La Silla, reports that M. P. and P. Veron observed
the nova over the range 610-710 nm using the 2.2-m European
Southern Observatory telescope with the Boller and Chivens spectrograph
and CCD detector. Broad, asymmetric H-alpha emission was present
on Oct. 4 with a width of 6.8 nm (3100 km/s) at the base.
NSV 2229
This object (cf. IAUC 3924, etc.) was not recorded down to
mag ~ 13 photographically on Sept. 6 by D. di Cicco, Sudbury, MA;
and to mag ~ 15 visually on Sept. 22 by di Cicco and also by M.
Verdenet, Bourbon-Lancy, France.
1984 October 5 (3998) Brian G. Marsden
Read IAUC 3999
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