9 Lac
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9 Lac
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9 Lac is a A-type (White) star. It carries the designation 9 Lac.
Located approximately 171.7 light-years from Earth, 9 Lac resides within the broader disk of our Milky Way galaxy.
9 Lac is classified as a spectral class A star (A-type (White)) on the Harvard spectral classification system.
With an apparent magnitude of +4.64, 9 Lac 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 blue-white hue, which corresponds to a B-V color index of +0.254.
物理的特性
| スペクトル型 | A Class A — A-type (White) |
| 色指数 (B−V) | 0.254 |
観測
| 見かけの等級 | +4.64 |
| 絶対等級 | 1.03 |
| 距離 | 172 ly |
位置
| 赤経 | 22h 37.37m |
| 赤緯 | 51° 32.71′ |