Central Bureau for Astronomical Telegrams
IAUC 3050: P/SCHWASSMANN-WACHMANN 1; R CrB Vars; NOVAE
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Read IAUC 3051
Circular No. 3050
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK Telex: 921428
Telephone: (617) 864-5758
PERIODIC COMET SCHWASSMANN-WACHMANN 1
Further precise positions have been reported as follows:
1976/77 UT R. A. (1950) Decl. m1 Observer
Nov. 24.64219 2 59 49.09 +28 31 20.9 12.5 Furuta
Dec. 27.16492 2 48 04.18 +27 03 25.8 Schwartz
Jan. 14.02887 2 46 47.89 +26 25 29.1 "
Feb. 17.01318 2 55 15.93 +25 58 17.2 Shao
T. Furuta (Tokai, Japan). 31-cm reflector. From Orient. Astron.
Assoc. Comet Bull. No. 141.
G. Schwartz and C. Y. Shao (Harvard College Observatory, Agassiz
Station). 155-cm reflector. Measurer: Shao.
K. Kane and T. P. Roark, Perkins Observatory, provide the
following total magnitude estimates (IIa-D emulsion, GG14 filter): 1976
Nov. 16.09, 12.4; 17.07, 12.8; 20.13, 13.5; 1977 Feb. 11.07, 12.3.
R CrB VARIABLES
R CrB. Further visual magnitude estimates suggest that this
decline is particularly rapid: Feb. 27.9 UT, 7.2 (C. Henshaw,
Cheadle, Cheshire, England); Mar. 1.3, 7.1 (D. Levy, New Orleans,
Louisiana); 3.49, 7.6 (L. Hiett, Arlington, Virginia); 5.51, 7.9 (J.
Morgan, Prescott, Arizona); 7.89, 8.1 (R. Lukas, Wilhelm Foerster
Observatory); 9.11, 9.6 (J. Bortle, Brooks Observatory); 11.33,
10.0 (P. L. Collins, Harvard College Observatory); 12.27, 10.4
(Collins); 12.49, 10.2 (Morgan); 14.52, 11.1 (Morgan).
SU Tau. Visual magnitude estimates: Feb. 21.31, 11.8 (C. E.
Spratt, Victoria, British Columbia); Mar. 1.10, 12.2 (C. Hurless,
Lima, Ohio); 7.02, 12.0 (Bortle); 13.15, 11.7 (Morgan).
NOVAE
V1500 Cyg. Visual estimate: Mar. 3.40 UT, 12.5 (Collins).
NQ Vul. Visual estimates: Mar. 1.41, 11.3 (Collins); 3.39,
11.5 (Collins); 9.53, 11.4 (Morgan); 14.54, 11.4 (Morgan).
Nova Sge 1977. Visual estimates: Feb. 17.43, 10.4 (Collins);
23.42, 11.5 (Collins); 26.41, 11.5 (Collins); Mar. 5.51, 11.2
(Morgan); 10.55, 10.5 (Morgan); 14.52, 11.2 (Morgan).
1977 March 16 (3050) Brian G. Marsden
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