On the Orbit of Visual Binary ADS 8119 AB ({\alpha} = 11h18m10s.9 and {\delta}=+31o31'44".9)

TL;DR

This paper determines the orbit and masses of the visual binary ADS 8119 AB using historical observational data and established methods, providing updated orbital parameters and physical characteristics of the system.

Contribution

It presents the first comprehensive orbital and physical analysis of ADS 8119 AB based on data from 1780 to 2005, applying Thiele Van den Bos method and empirical mass-luminosity relations.

Findings

Orbital period of 60 years with eccentricity 0.426.

Masses of primary and secondary are 1.4 and 1.2 solar masses.

Orbital elements and physical parameters are precisely determined.

Abstract

Xi UrsaMajoris ({\xi} Uma) historically is one of the most important double star inconstellation Ursa Major, found by Sir William Herschel on May, 2, 1780 and the first binary successfully determined by using the principle of two body problem in 1828 by Savary. This star consists of two pair wide binary ADS8119 AB; in this case HD 98231(ADS8119 A) as primary and HD98230 (ADS 8119 B) as secondary. We have collected the observational data consist of separation angular ({\rho}) and position angle ({\theta}) fromthe observations in 1780 up to 2005 taken from Bosscha Observatory and other Observatories in the world. This paper presents the recent status of orbit binary system ADS 8119. By using Thiele Van den Bos method and empirical formula Strand's Mass-Luminosity relation we have determined the orbit and mass of ADS 8119AB. The result is; Orbital and Physical Element of ADS 8119 AB. Dynamical Elements, Orbit Orientation, Masses-Parallax; P = 60 years, e = 0.426, T = 1935.8, i = 110o9, {\Omega} = 104o.7, {\omega} = 117o5, M1 = 1.4Mo, M2 = 1.2Mo, p = 0".122