4 Per
4 Per
4 Per is a B-type (Blue-White) star located in the constellation Perseus. It carries the designation 4 Per.
Located approximately 728.0 light-years from Earth, 4 Per resides within the broader disk of our Milky Way galaxy.
4 Per is classified as a spectral class B star (B-type (Blue-White)) on the Harvard spectral classification system.
With an apparent magnitude of +4.99, 4 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 -0.071.
물리적 특성
| 분광형 | Class B — B-type (Blue-White) |
| 색지수 (B−V) | -0.071 |
관측
| 겉보기 등급 | +4.99 |
| 절대 등급 | -1.75 |
| 거리 | 728 ly |
| 별자리 | Perseus |
위치
| 적경 | 2h 2.30m |
| 적위 | 54° 29.25′ |
자주 묻는 질문
What type of star is 4 Per?
4 Per is a Class B — B-type (Blue-White) star.
How far is 4 Per from Earth?
4 Per is approximately 728.0 light-years from Earth.
Can you see 4 Per with the naked eye?
With an apparent magnitude of 4.99, 4 Per is visible to the naked eye.
What constellation is 4 Per in?
4 Per is located in the constellation Perseus.