30 Cap
30 Cap
30 Cap is a B-type (Blue-White) star. It carries the designation 30 Cap.
Located approximately 533.8 light-years from Earth, 30 Cap resides within the broader disk of our Milky Way galaxy.
30 Cap is classified as a spectral class B star (B-type (Blue-White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.40, 30 Cap 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 -0.118.
Physical Properties
| Spectral Class | Class B — B-type (Blue-White) |
| Color Index (B−V) | -0.118 |
Observation
| Apparent Magnitude | +5.40 |
| Absolute Magnitude | -0.67 |
| Distance | 534 ly |
Position
| Right Ascension | 21h 17.95m |
| Declination | -17° 59.11′ |
Frequently Asked Questions
What type of star is 30 Cap?
30 Cap is a Class B — B-type (Blue-White) star.
How far is 30 Cap from Earth?
30 Cap is approximately 533.8 light-years from Earth.
Can you see 30 Cap with the naked eye?
With an apparent magnitude of 5.40, 30 Cap is visible to the naked eye.