4 Per

4 Per

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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.

Physical Properties

Spectral Class B Class B — B-type (Blue-White)
Color Index (B−V) -0.071

Observation

Apparent Magnitude +4.99
Absolute Magnitude -1.75
Distance 728 ly
Constellation Perseus

Position

Right Ascension 2h 2.30m
Declination 54° 29.25′

Frequently Asked Questions

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.