21Eta UMi
21Eta UMi
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21Eta UMi is a F-type (Yellow-White) star. It carries the designation 21Eta UMi.
Located approximately 97.0 light-years from Earth, 21Eta UMi resides within the broader disk of our Milky Way galaxy.
21Eta UMi is classified as a spectral class F star (F-type (Yellow-White)) on the Harvard spectral classification system.
With an apparent magnitude of +4.95, 21Eta UMi 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 +0.393.
物理特性
| 光谱类型 | F Class F — F-type (Yellow-White) |
| 色指数 (B−V) | 0.393 |
观测
| 视星等 | +4.95 |
| 绝对星等 | 2.58 |
| 距离 | 97.0 ly |
位置
| 赤经 | 16h 17.51m |
| 赤纬 | 75° 45.32′ |