Central Bureau for Astronomical Telegrams
IAUC 5053: 1990i; CH Cyg; VY Aqr
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Circular No. 5053
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
COMET TSUCHIYA-KIUCHI (1990i)
The following precise positions have been reported:
1990 UT R.A. (1950) Decl. m1 Observer
July 13.52222 12 31 42.87 +31 13 42.3 8 Tsuchiya
13.54826 12 31 40.23 +31 12 59.1 "
17.24972 12 23 12.38 +29 42 20.2 Balam
17.26014 12 23 10.89 +29 42 04.1 "
K. Tsuchiya (Toma station). Long. = +142.551 deg, Lat. = +43.849
deg, h = 210 m. Measured by H. Kosai.
D. D. Balam and J. B. Tatum (Climenhaga Observatory, Victoria).
0.25-m Schmidt telescope. Measured by Tatum.
Total visual magnitude estimates: July 16.94 UT, 9 (M. V.
Zanotta, Milan, Italy; independent discovery); 17.20, 8.9 (C. S.
Morris, Whitaker Peak, CA, 20x80 binoculars; coma diameter 8').
CH CYGNI
M. Hack and S. Ferluga, Department of Astronomy, Trieste
University, telex: "A probable new outburst of the symbiotic star
CH Cyg has been observed on July 6 and 7 with the 1.52-m telescope
of the Haute Provence Observatory. Spectra (ranges 408.0-501.6 nm
and 462.0-505.0 nm, resolution about 0.05 nm) show strong emissions
of H I, He I, Fe II, [Fe II], and [O III] at 500.7 nm. All these
emissions, with the exception of H-alpha, H-beta, and H-gamma,
were much fainter or absent in 1988-89."
Visual magnitude estimates (cf. IAUC 4907), communicated
in part by E. Waagen, AAVSO: 1989 Nov. 25.0 UT, 9.2 (J. E. Bortle,
Stormville, NY); Dec. 29.73, 8.1 (A. Boattini, Florence, Italy);
1990 Jan. 24.74, 9.0 (P. Schmeer, Bischmisheim, West Germany);
Mar. 27.05, 9.0 (A. Pereira, Cabo da Roca, Portugal); Apr. 18.97,
9.2 (Schmeer); May 15.0, 9.5 (A. Mizser, Budapest, Hungary); June
3.98, 9.4 (Pereira); 17.93, 9.4 (Pereira); 26.2, 8.8 (E. Oravec,
Tuckahoe, NY); July 14.01, 8.9 (P. Sventek, Houston, TX).
VY AQUARII
Visual magnitude estimates by Schmeer: 1989 Oct. 27.76 UT,
[13.4 (correction to IAUC 5046); 1990 July 2.95, 10.7; 7.04, 11.0;
10.09, 11.3; 11.91, 11.5; 13.02, 11.8; 13.93, 12.4; 14.94, 13.5;
16.05, [13.7.
1990 July 17 (5053) Daniel W. E. Green
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