81Pi 2Cyg
81Pi 2Cyg
81Pi 2Cyg is a B-type (Blue-White) star located in the constellation Cygnus. It carries the designation 81Pi 2Cyg.
At a distance of roughly 1,106 light-years, 81Pi 2Cyg is a distant star lying deep within the Milky Way galaxy.
81Pi 2Cyg is classified as a spectral class B star (B-type (Blue-White)) on the Harvard spectral classification system.
With an apparent magnitude of +4.23, 81Pi 2Cyg 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 -0.120.
Physical Properties
| Spectral Class | Class B — B-type (Blue-White) |
| Color Index (B−V) | -0.120 |
Observation
| Apparent Magnitude | +4.23 |
| Absolute Magnitude | -3.42 |
| Distance | 1,106 ly |
| Constellation | Cygnus |
Position
| Right Ascension | 21h 46.79m |
| Declination | 49° 18.57′ |
Frequently Asked Questions
What type of star is 81Pi 2Cyg?
81Pi 2Cyg is a Class B — B-type (Blue-White) star.
How far is 81Pi 2Cyg from Earth?
81Pi 2Cyg is approximately 1,105.6 light-years from Earth.
Can you see 81Pi 2Cyg with the naked eye?
With an apparent magnitude of 4.23, 81Pi 2Cyg is visible to the naked eye.
What constellation is 81Pi 2Cyg in?
81Pi 2Cyg is located in the constellation Cygnus.