9 Per
9 Per
9 Per is a A-type (White) star located in the constellation Perseus. It carries the designation 9 Per.
9 Per is an extraordinarily remote star, situated approximately 326,156 light-years from Earth.
9 Per is classified as a spectral class A star (A-type (White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.16, 9 Per 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 +0.369.
物理的特性
| スペクトル型 | A Class A — A-type (White) |
| 色指数 (B−V) | 0.369 |
観測
| 見かけの等級 | +5.16 |
| 絶対等級 | -14.84 |
| 距離 | 326,156 ly |
| 星座 | Perseus |
位置
| 赤経 | 2h 22.36m |
| 赤緯 | 55° 50.74′ |
Frequently Asked Questions
What type of star is 9 Per?
9 Per is a Class A — A-type (White) star.
How far is 9 Per from Earth?
9 Per is approximately 326,156.0 light-years from Earth.
Can you see 9 Per with the naked eye?
With an apparent magnitude of 5.16, 9 Per is visible to the naked eye.
What constellation is 9 Per in?
9 Per is located in the constellation Perseus.