40 Per
40 Per
40 Per is a B-type (Blue-White) star located in the constellation Perseus. It carries the designation 40 Per.
At a distance of roughly 1,056 light-years, 40 Per is a distant star lying deep within the Milky Way galaxy.
40 Per is classified as a spectral class B star (B-type (Blue-White)) on the Harvard spectral classification system.
With an apparent magnitude of +4.97, 40 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 blue hue, which corresponds to a B-V color index of -0.048.
物理的特性
| スペクトル型 | B Class B — B-type (Blue-White) |
| 色指数 (B−V) | -0.048 |
観測
| 見かけの等級 | +4.97 |
| 絶対等級 | -2.58 |
| 距離 | 1,056 ly |
| 星座 | Perseus |
位置
| 赤経 | 3h 42.38m |
| 赤緯 | 33° 57.90′ |
Frequently Asked Questions
What type of star is 40 Per?
40 Per is a Class B — B-type (Blue-White) star.
How far is 40 Per from Earth?
40 Per is approximately 1,055.5 light-years from Earth.
Can you see 40 Per with the naked eye?
With an apparent magnitude of 4.97, 40 Per is visible to the naked eye.
What constellation is 40 Per in?
40 Per is located in the constellation Perseus.