Rukbat
Alp Sgr
Rukbat is a B-type (Blue-White) star located in the constellation Sagittarius. It carries the designation Alp Sgr.
Located approximately 181.8 light-years from Earth, Rukbat resides within the broader disk of our Milky Way galaxy.
Rukbat is classified as a spectral class B star (B-type (Blue-White)) on the Harvard spectral classification system.
At an apparent magnitude of +3.96, Rukbat is visible to the naked eye under reasonably clear skies. It may require dark-sky conditions to be seen comfortably in areas with significant light pollution. Observers will note its blue hue, which corresponds to a B-V color index of -0.105.
物理的特性
| スペクトル型 | B Class B — B-type (Blue-White) |
| 色指数 (B−V) | -0.105 |
観測
| 見かけの等級 | +3.96 |
| 絶対等級 | 0.23 |
| 距離 | 182 ly |
| 星座 | Sagittarius |
位置
| 赤経 | 19h 23.89m |
| 赤緯 | -40° 36.96′ |
Frequently Asked Questions
What type of star is Rukbat?
Rukbat is a Class B — B-type (Blue-White) star.
How far is Rukbat from Earth?
Rukbat is approximately 181.8 light-years from Earth.
Can you see Rukbat with the naked eye?
With an apparent magnitude of 3.96, Rukbat is visible to the naked eye.
What constellation is Rukbat in?
Rukbat is located in the constellation Sagittarius.