21 Ori
21 Ori
21 Ori is a F-type (Yellow-White) star located in the constellation Orion. It carries the designation 21 Ori.
Located approximately 202.1 light-years from Earth, 21 Ori resides within the broader disk of our Milky Way galaxy.
21 Ori is classified as a spectral class F star (F-type (Yellow-White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.34, 21 Ori sits near the limit of naked-eye visibility. It can be glimpsed without optical aid under dark skies, but binoculars will make observation much easier. Observers will note its white hue, which corresponds to a B-V color index of +0.412.
物理的特性
| スペクトル型 | Class F — F-type (Yellow-White) |
| 色指数 (B−V) | 0.412 |
観測
| 見かけの等級 | +5.34 |
| 絶対等級 | 1.38 |
| 距離 | 202 ly |
| 星座 | Orion |
位置
| 赤経 | 5h 19.19m |
| 赤緯 | 2° 35.75′ |
よくある質問
What type of star is 21 Ori?
21 Ori is a Class F — F-type (Yellow-White) star.
How far is 21 Ori from Earth?
21 Ori is approximately 202.1 light-years from Earth.
Can you see 21 Ori with the naked eye?
With an apparent magnitude of 5.34, 21 Ori is visible to the naked eye.
What constellation is 21 Ori in?
21 Ori is located in the constellation Orion.