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.
Đặc tính vật lý
| Phân Loại Quang Phổ | Class B — B-type (Blue-White) |
| Chỉ số màu (B−V) | -0,071 |
Quan sát
| Cấp Sao Biểu Kiến | +4.99 |
| Cấp Sao Tuyệt Đối | -1,75 |
| Khoảng Cách | 728 ly |
| Chòm Sao | Perseus |
Vị trí
| Xích kinh | 2h 2,30m |
| Xích vĩ | 54° 29,25′ |
Câu hỏi thường gặp
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.