Central Bureau for Astronomical Telegrams
IAUC 3263: N Cyg 1978; 1978j
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Read IAUC 3264
Circular No. 3263
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 617-864-5758
NOVA CYGNI 1978
Peter L. Collins, Mount Hopkins Observatory, reports the discovery
of a nova on Sept. 10.24 UT at the position R.A. = 21h40m.6, Decl. =
+43o48' (equinox 1950.0). Several visual magnitude estimates by
the discoverer during Sept. 10.31-10.50 UT gave 6.9-7.0. From a
visual inspection of the same region the previous night it was
concluded that the object was probably then fainter than magnitude 9.
C.-Y. Shao, Center for Astrophysics, has measured the following
precise position from a plate (somewhat overexposed) obtained
by G. Schwartz with the 41-cm Metcalf astrograph at Harvard
Observatory's Agassiz Station:
1978 UT R. A. (1950) Decl. mpg
Sept. 10.33785 21 40 38.28 +43 48 09.8 6.8
The object was evidently fainter than magnitude 14 when a Harvard
patrol plate was taken on Sept. 2. A cursory inspection of the
Palomar Sky Survey prints reveals a possible candidate for the
prenova near the magnitude limit.
Further visual magnitude estimates: Sept. 10.50 UT, 6.6 (M.
Hiraga, Dazaifu, Fukuoka; independent discovery); 11.0, 6.3 (D.
Proust and M. Verdenet, Meudon Observatory; independent discovery);
11.07, 6.4 (T. Bretl, Overland Park, Kansas); 11.13, 6.3 (J. Morgan,
Prescott, Arizona); 11.16, 6.6 (C. Hurless, Lima, Ohio); 11.17, 6.4
(R. Annal, Barstow, California); 11.19, 6.6 (E. Mayer, Barberton,
Ohio); 11.28, 6.7 (P. L. Collins, Mount Hopkins Observatory).
PERIODIC COMET HANEDA-CAMPOS (1978j)
Shao has also measured the following precise positions from
exposures by Schwartz with the 41-cm Metcalf astrograph:
1978 UT R. A. (1950) Decl.
Sept. 6.20498 20 58 27.85 -32 03 13.6
8.16787 21 02 33.40 -33 11 43.8
A visual estimate by Collins on Sept. 7.22 UT (20-cm reflector)
put the comet at magnitude 10.2.
1978 September 11 (3263) Brian G. Marsden
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