Improvement of Type II Photoelectric Astrolabe and Primary Results
1993 ◽
Vol 156
◽
pp. 85-87
Utilizing the photon counter to register the star through the 60° altitude and a microcomputer to control the telescope pointing, the automatization was attained in the observation of type II photoelectric astrolabe. The limiting magnitude of the improved astrolabe is up to 11.0 and the precision of single determination is ± 0.2 arc — sec. This automatic instrument is more powerful in improving the FK5 system and expanding the current optical celestial system into faint stars.
1978 ◽
Vol 36
(2)
◽
pp. 470-471
1987 ◽
Vol 45
◽
pp. 792-793
The distribution and density of ciliary tufts on the siphons of Anodonta cygnea (Mollusca: Bivalvia)
1990 ◽
Vol 48
(3)
◽
pp. 518-519
1990 ◽
Vol 48
(4)
◽
pp. 764-765