4 Cen

4 Cen

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4 Cen is a B-type (Blue-White) star located in the constellation Centaurus. It carries the designation 4 Cen.

Located approximately 637.0 light-years from Earth, 4 Cen resides within the broader disk of our Milky Way galaxy.

4 Cen is classified as a spectral class B star (B-type (Blue-White)) on the Harvard spectral classification system.

With an apparent magnitude of +4.75, 4 Cen 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 -0.111.

Physical Properties

Spectral Class B Class B — B-type (Blue-White)
Color Index (B−V) -0.111

Observation

Apparent Magnitude +4.75
Absolute Magnitude -1.70
Distance 637 ly
Constellation Centaurus

Position

Right Ascension 13h 53.21m
Declination -31° 55.66′

Frequently Asked Questions

What type of star is 4 Cen?
4 Cen is a Class B — B-type (Blue-White) star.
How far is 4 Cen from Earth?
4 Cen is approximately 637.0 light-years from Earth.
Can you see 4 Cen with the naked eye?
With an apparent magnitude of 4.75, 4 Cen is visible to the naked eye.
What constellation is 4 Cen in?
4 Cen is located in the constellation Centaurus.