31 Per
31 Per
31 Per is a B-type (Blue-White) star located in the constellation Perseus. It carries the designation 31 Per.
Located approximately 560.4 light-years from Earth, 31 Per resides within the broader disk of our Milky Way galaxy.
31 Per is classified as a spectral class B star (B-type (Blue-White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.05, 31 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 -0.067.
Physical Properties
| Spectral Class | Class B — B-type (Blue-White) |
| Color Index (B−V) | -0.067 |
Observation
| Apparent Magnitude | +5.05 |
| Absolute Magnitude | -1.12 |
| Distance | 560 ly |
| Constellation | Perseus |
Position
| Right Ascension | 3h 19.13m |
| Declination | 50° 5.70′ |
Frequently Asked Questions
What type of star is 31 Per?
31 Per is a Class B — B-type (Blue-White) star.
How far is 31 Per from Earth?
31 Per is approximately 560.4 light-years from Earth.
Can you see 31 Per with the naked eye?
With an apparent magnitude of 5.05, 31 Per is visible to the naked eye.
What constellation is 31 Per in?
31 Per is located in the constellation Perseus.