Central Bureau for Astronomical Telegrams
IAUC 4579: Var IN And; (2060); 1988a
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Circular No. 4579
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
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
VARIABLE IN ANDROMEDA
G. M. Hurst, Basingstoke, England, informs us that this
object appears to be substantially fainter (R about 20) on the red
Palomar Sky Survey print than on the blue (cf. IAUC 4577) and thus
that his suggestion that the object is a Mira variable is probably
incorrect. Furthermore, his rigorous examination of the 1976 Oct.
19 Papadopoulos chart under high magnification suggests that the
image he previously mentioned is a flaw, for the appearance is
slightly elongated and at a position that is slightly different
from that of the new object on prime-focus exposures by A. Young.
Spectroscopic observations would be useful for establishing
whether the object is a nova. Hurst provides the following
additional visual magnitude estimates: Apr. 3.84 UT, 11.3;
9.84, 12.0; 10.84, 12.1.
(2060) CHIRON
E. Bowell, Lowell Observatory, reports that S. J. Bus, B. A.
Skiff and C. J. Cunningham obtained CCD photometry of (2060) Chiron on
Mar. 23. They find that Chiron is 0.6 +/- 0.1 mag brighter than in
1986 (Bus et al., submitted to Icarus), confirming the finding by
Tholen et al. (IAUC 4554) and indicating that the brightening has
persisted for more than one month. The uncertainty in the magnitude
change arises from the use of different R-band filters and the
imprecisely known phase curve. A total of 1.9 hr of observation shows
brightness variation consistent with previously observed lightcurves.
Specifically, the lightcurve amplitude appears to be similar, and the
rotational phase is as predicted by the 1986 observations.
COMET LILLER (1988a)
Total visual magnitude estimates: Mar. 22.79 UT, 6.3 (M. V.
Zanotta, Milan, Italy, 20 x 80 binoculars; 45' tail in p.a. 70 deg,
20' jet in p.a. 10 deg); 25.82, 6.8 (J. D. Shanklin, Cambridge,
England, 20 x 80 binoculars); 27.79, 5.8 (S. Baroni, Milan, Italy, 20
x 80 binoculars); 30.10, 6.8 (E. A. Jacobson, Evansville, MN, 10 x 50
binoculars); Apr. 4.11, 6.0 (A. Hale, Las Cruces, NM, 0.20-m
reflector); 6.11, 6.4 (Jacobson; tail about 10 arcmin in p.a. 5 deg);
8.13, 6.4 (Jacobson); 10.79, 5.9 (A. Trebacz, Niepolomice Observatory,
Poland, 10 x 50 binoculars); 11.84, 6.0 (P. Schmeer, Bischmisheim,
West Germany, 20 x 80 binoculars); 12.45, 5.9 (Hale, 10 x 50
binoculars; 30' tail in p.a. 345 deg); 13.02, 5.5 (D. W. E. Green,
Cambridge, MA, 7 x 50 binoculars).
1988 April 13 (4579) Brian G. Marsden
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