688 B
688 B
| name | constellation | created_by | created_date | updated_by | updated_date |
|---|---|---|---|---|---|
| ξ Boo | Boo | editor.cs | 2022-01-21 17:00:00 | skybber | 2022-01-21 18:18:10.861770 |
a close binary star, with components of 4.8mag (yellow) with 6.9mag (red-orange), which have a mutual orbital period of 149 years. Since 1980, when they reached their greatest distance apart (7.2"), their separation has gradually decreased again, and is currently about 6". At their smallest separation of 1.8" (last seen in 1918), the guides are lost in small telescopes. The system is 22 light years away. Another star, HR 5553 (6mag), commonly appears in the field of view at a distance of 99" but is not related to this system.