New orbits of four visual double stars by the method of apparent motion parameters (AMP)

The Astrometric Study of ADS 48 — a Nearby Double Star with a Probable Invisible Satellite

“…This visual double star is observed from 1877, and it was repeatedly investigated by different authors. When we investigated the AMP-method, this star was a prototype for a lot of model examples, its AMP-orbit was calculated on the basis of the short-arc photographic observations made in Pulkovo with the 26-inch refractor from 1960 til 1985 (Kisselev & Kiyaeva 1988). Our orbit was in agreement with ancient observations and coincided with a Giintzel-Lingner (1955) one within the error box.…”

The Pulkovo Programme for the Study of Visual Double Stars

“…Among them there are 11 binaries within 25 parsecs of the Sun, which are not included in Woolley's catalogue. The data of the Pulkovo catalogue were used for computing new orbits (by the AMP-method) for 9 visual double stars [1,3], three of them being determined for the first time.…”

Determination of Visual Binary Orbits from Short–Arc Observations Using the Method of Apparent Motion Parameters

“…The AMP-method serves as a basic tool in the investigations of double stars at Pulkovo observatory which have been carried out with 26-inch Zeiss astrograph since 1960. In the course of these investigations (Kisselev et al 1990) we have determined 10 new orbits of wide binaires, three of them were computed for the first time (Kisselev et al 1990, Kisselev & Kijaeva 1988. Some of these orbits were used to examine the problem of dark-companion existence (see O.V.…”