Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-07-15
Proceeding of International Conference on Mathematics and Natural Sciences (ICMNS) November 29-30, 2006 Bandung-Indonesia pp.1
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
4 pages,3 figures
Scientific paper
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
Nugroho Hadi D.
Siregar Suryadi
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