Central Bureau for Astronomical Telegrams
IAUC 3311: WZ Sge; 1978q
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Circular No. 3311
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
WZ SAGITTAE
J. Patterson, Department of Astronomy, University of Texas, reports
that this recurrent nova, previously observed to have outbursts
in 1913 and 1946, was found to be in outburst again by J. T.
McGraw on Dec. 1.1 UT. Photometry by McGraw and Patterson at the
McDonald Observatory on Dec. 1 and 2 showed V to vary from 8.0 to
7.6 with period 82 +/- 1 min, consistent with the 81.7-min orbital
period; mean colors were B-V = -0.09, U-B = -0.98; there was flickering
of up to 10 percent on a timescale of 2-10 min; the 27.8684-s
periodic variation seen at minimum light was not detected. Time-
resolved spectroscopy by R. E. Nather and R. Stover showed significant
line intensity and profile variations, which seem to be correlated
with the orbital period. H-alpha showed double-peaked emission
lines with ~ 10-A separation. H-beta has both absorption and emission
components, as does He I 5876 A. Higher Balmer series are broad,
shallow absorption features, as is He I 4471 A. He II 4686 A is in
emission with doubled profile; peak separation is ~ 16 A. The C-N
complex at 4640 A is in emission. There is no evidence of ejecta.
The photometric and spectroscopic features are typical of those of
dwarf novae in outburst.
PERIODIC COMET JACKSON-NEUJMIN (1978q)
C. T. Kowal, Hale Observatories, reports that he has recovered
this comet with the 122-cm Palomar Schmidt telescope as follows:
1978 UT R. A. (1950) Decl. m1
Nov. 28.12014 20 23.4 -18 27 19.5
29.11597 20 26.7 -18 24
The object is diffuse, with little condensation. The following
ephemeris incorporates the indicated correction of Delta-T = +0.77 day
to the prediction on IAUC 3215 and in Handb. Br. Astron. Assoc.
for 1978 and 1979:
1978/79 ET R.A. (1950) Decl. 1979 ET R.A. (1950) Decl.
Nov. 28 20 23.10 -18 26.8 Jan. 17 23 09.97 -11 32.3
Dec. 8 20 55.58 -17 56.6 27 23 42.71 - 9 07.8
18 21 28.97 -16 58.0 Feb. 6 0 14.63 - 6 34.5
28 22 02.78 -15 32.2 16 0 45.60 - 3 57.9
Jan. 7 22 36.57 -13 42.1 26 1 15.61 - 1 23.1
1978 December 4 (3311) Brian G. Marsden
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