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IAUC 4246: N Cyg 1986; R CrB

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                                                  Circular No. 4246
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


NOVA CYGNI 1986
     Precise positions have been measured by W. S. Penhallow at
Quonochontaug Observatory; and by J. B. Tatum, University of
Victoria, from exposures on Aug. 15 and 17 (the latter taken by T. B.
Lowe), respectively: R.A. = 19h52m45s89 (by Penhallow; Tatum gives
45s88), Decl. = +35deg34'18"7 (equinox 1950.0).

     C. Aikman, Dominion Astrophysical Observatory, reports that a
spectrogram obtained on Aug. 13.25 UT reveals H and He emission
lines characteristic of a well-developed nova; H-beta emission extends
over ~ 1600 km/s.  H. Kosai, Tokyo Astronomical Observatory, telexes
that Y. Norimoto found very strong H-alpha and H-beta emission on
spectra obtained with the Okayama 0.91-m reflector on Aug. 13.59.
L. Rosino and T. Iijima, Asiago Astrophysical Observatory,
communicate: "Spectra obtained on Aug. 14-16 are characterized by the
presence over a strong continuum of wide emission lines of H (
Balmer), Fe II (multiplets 74, 49, 48, 46, 43, 42, 38, 37, 36, 28 and
27), N II, Ca II (H and K), Na I (589.3 nm), Si II, Mg I, and Ti
II.  Most of the lines have typical saddle-shaped profiles, their
total halfwidth being on the order of 630 km/s.  P-Cyg absorption
features are weak or absent."

     W. Wenzel, Sonneberg Observatory, reports that 598 patrol
plates taken by H. Huth during 1956-1985 show no previous eruptions
brighter than mag 13; the amplitude deduced from Palomar Sky
Survey stars near the position also suggests that Wakuda's object
is a nova.  The following photographic magnitude estimates are by
Wenzel and B. Fuhrmann at Sonneberg unless otherwise noted: July
1.96 UT, [14.0; 26.11, [13 (C.-Y. Shao, Oak Ridge Observatory,
Damon patrol plate); 29.93, 13.5; 30.93, 12.0; Aug. 1.92, 10.6;
1.95, 10.8 (Rosino); 2.93, 9.4; 3.93, 9.4; 4.29, 10.2 (Shao);
5.92, 10.1; 6.93, 10.1; 7.93, 9.5; 8.93, 9.0; 9.12, 9.5 (Shao).


R CORONAE BOREALIS
     D. Bohme, Nessa, East Germany, provides the following
photoelectric data: Apr. 13.833 UT, V = 6.19, B-V = +0.68; 14.836, V =
6.18, B-V = +0.63; 29.917, V = 6.12, B-V = +0.63; May 1.907, V =
6.07, B-V = +0.60, U-B = +0.26; 2.938, V = 6.02, B-V = +0.57, U-B
= +0.17; 3.917, V = 6.02, B-V = +0.62, U-B = +0.13; 12.896, V =
5.97, B-V = +0.63, U-B = +0.13; 25.925, V = 5.89, B-V = +0.53;
26.908, V = 5.86, B-V = +0.62, U-B = +0.02.


1986 August 19                 (4246)              Brian G. Marsden

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