Central Bureau for Astronomical Telegrams
IAUC 4075: NSV 7429; 1984e; AM Her
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Circular No. 4075
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
NSV 7429
W. Liller, Vina del Mar, Chile, notified the Bureau on May 28
of his discovery of a possible nova of red magnitude 9.0 (on May
27.030 UT) at R.A. = 16h03m03s3, Decl. = -51deg56'23" (equinox 1950.0;
+/- 10"); it did not appear on photographs to limiting yellow mag 10.0
during the past two years, nor to red mag 11.5 on Apr. 29.
Requests for confirmation by the Bureau gained replies from R. H.
McNaught, Siding Spring Observatory, who suggested the identification
with NSV 7429 = HV 8827; from D. Baade and J. Krautter, visiting
astronomers at the European Southern Observatory, La Silla; and
from D. Overbeek, Edenvale, South Africa (via J. Mattei, AAVSO),
who estimated mv = 11.4 on May 29.858. NSV 7429 is listed in the
New Catalogue of Suspected Variable Stars as ranging from mag 15.0
to [18, with a published position only slightly different from
McNaught's measured position (from a U.K. Schmidt Telescope Unit J
plate taken 1979 Mar. 22) of R.A. = 16h02m56s02, Decl. = -51P54'57"9
(equinox 1950.0, +/- 1"). A search by McNaught of 10 photographic
charts back to 1916 shows its variation from mag 13 to fainter than
B = 15.9; on May 29.49, he noted it as clearly red at mv = 10.6.
Baade and Krautter report that a 5-min exposure taken May 30 with
the cassegrain echelle spectrograph at the ESO 3.6-m telescope and
covering the wavelength range 420-510 nm shows the continuum well
detected only in the red part of the spectrum; the most prominent
features are strong, narrow (35 km/s FWHM) H-gamma and H-beta emission
lines. Fe II 492.3-nm also appears in emission. The absorption
spectrum is characterized by strong molecular bands as in stars of
spectral type M3-M5. The object may be related to the class of
symbiotic stars although no traces of emission due to O III 495.9-
and 500.7-nm and He II 468.6-nm are seen.
PERIODIC COMET GIACOBINI-ZINNER (1984e)
Total visual magnitude estimate by J. E. Bortle, Stormville,
NY (0.32-m reflector); May 30.31 UT, 12.0. Corrigendum: On IAUC
4070, the time for the May 26 observation should read May 26.47.
AM HERCULIS
Visual magnitude estimates by M. Verdenet, Bourbon-Lancy,
France: Feb. 28.1 UT, 13.3; Mar. 25.1, 14.8; Apr. 1.1, 14.9; 3.1,
[14.6; 20.1, 14.9.
1985 June 13 (4075) Daniel W. E. Green
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