672 B
672 B
| name | constellation | created_by | created_date | updated_by | updated_date |
|---|---|---|---|---|---|
| ξ UMa | UMa | editor.cs | 2022-01-21 17:00:00 | skybber | 2022-02-03 20:44:01.227282 |
the first binary star where the orbit of the components was calculated, and it was 60 years. The French astronomer Felix Savary succeeded in 1828. It is made up of golden components with a brightness of 4.3mag and 4.8mag, 3 billion kilometres apart. Around 1970 they were 3" apart and could be easily distinguished with small telescopes. Then their separation decreased, reaching a minimum of 0.8" in 1992. Today, the value is around 2", so a telescope with an 8 cm lens diameter is sufficient to distinguish them.