Orbital elements of five close visual binary stars

In this paper orbits for 13 binaries are recalculated and presented. The reason is that recent observations show higher residuals than the corresponding ephemerides calculated by using the orbital elements given in the Sixth Catalog of Orbits of Visual Binary Stars. The binaries studied were: WDS 00182+7257 = A 803, WDS 00335+4006 = HO 3, WDS 00583+2124 = BU 302, WDS 01011+6022 = A 926, WDS 01014+1155 = BU 867, WDS 01112+4113 = A 655, WDS 01361?2954 + HJ 3447, WDS 02333+5219 = STT 42 AB,WDS 04362+0814 = A 1840 AB,WDS 08017?0836 = A 1580, WDS 08277?0425 = A 550, WDS 17471+1742 = STF 2215 and WDS 18025+4414 = BU 1127 Aa-B. In addition, for three binaries - WDS 01532+1526 = BU 260, WDS 02563+7253 = STF 312 AB and WDS 05003+3924 = STT 92 AB - the orbital elements are calculated for the first time. In this paper the authors present not only the orbital elements, but the masses dynamical parallaxes, absolute magnitudes and ephemerides for the next five years, as well.

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Parallaxes, mass ratios and masses for the visual binary stars BD +75403, ADS 9094 and ADS 9716.

The Astronomical Journal ◽

10.1086/111275 ◽

1972 ◽

Vol 77 ◽

pp. 251

Author(s):

J. L. Hershey

Keyword(s):

Binary Stars ◽

Visual Binary ◽

Mass Ratios ◽

Visual Binary Stars

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Speckle Observations of Triple Stars

International Astronomical Union Colloquium ◽

10.1017/s0252921100007132 ◽

1992 ◽

Vol 135 ◽

pp. 555-557

Author(s):

Syuzo Isobe ◽

Naoshi Baba

Keyword(s):

Binary Stars ◽

Angular Resolution ◽

Ccd Camera ◽

Aging Effect ◽

Diffraction Limit ◽

Visual Binary ◽

San Pedro ◽

Spectroscopic Binary ◽

Visual Binary Stars ◽

Triple Stars

Our speckle observations were started in 1987 using a 212-cm telescope at San Pedro Martir Observatory in Mexico. A D-IMOSS camera was used until 1990 and an I-CCD camera was introduced in 1991. The old camera has only 0″.20 angular resolution because of an aging effect in its intensifier, while the new camera has 0″.06 angular resolution, which is nearly equal to the diffraction limit of the telescope. 128 visual binary stars and 755 spectroscopic binary stars have been observed. The numbers of stars and observations each year are shown in Table 1 and all the observed data are given in a series of papers by Isobe et al. (1990a, 1990b, 1992a) and Miura et al. (1992).

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