COMMISSION 27 OF THE I. A. U.
INFORMATION BULLETIN ON VARIABLE STARS
Number 1673
Konkoly Observatory
Budapest
1979 September 18
MOMENTS OF MINIMA OF AK Her
The light of the eclipsing binary star AK Her is measured
from photographs made by the "Sky Service" Astronomical Observatory,
Odessa University within 1952 through 1978. The total number
of photographic and photovisual light measurements obtained
amounts to 248 and 579, respectively.
From all this observational material separately on photometric
systems of observations 25 moments of primary and secondary
minima have been determined. The photometric elements (T.
Herczeg, Bonn.Verof., 63, 1962) used are
Min.hel.J.D.= 2436025.4730 + 0.42152421d*E.
The results of determinations of moments of minimum with
indexing the minimum-type as well as E and (O-C) with respect to
the elements above are summarized in the Table.
Min.hel.J.D. * E O-C
2434866.273 I pg -2750 -0.008
.486 II pg .5 -0.006
36545.211 I pv +1233 -0.001
.414 II pv .5 -0.009
36570.502 I pg +1293 -0.002
.713 II pg .5 -0.002
36908.565 I pv +2095 -0.001
.765 II pv .5 -0.012
37128.176 I pv +2616 -0.004
.386 II pv .5 -0.006
37612.513 I pv +3765 +0.001
.722 II pv .5 -0.001
37858.684 I pg +4349 +0.002
.893 II pg .5 0.000
38049.635 I pv +4802 +0.002
.843 II pv .5 0.000
38897.733 I pv +6814 -0.006
.942 II pv .5 -0.008
40017.724 I pv +9471 -0.005
2440581.316 I pv +1080 +0.009
.506 II pv .5 -0.011
41109.475 I pv +12061 -0.002
.688 II pv .5 0.000
42220.195 I pv +14696 +0.002
.388 II pv .5 -0.015
V.G. KARETNIKOV
Astronomical Observatory
of the Odessa University
U.S.S.R.