81 Tau
81 Tau
81 Tau is a A-type (White) star located in the constellation Taurus. It carries the designation 81 Tau.
Located approximately 146.5 light-years from Earth, 81 Tau resides within the broader disk of our Milky Way galaxy.
81 Tau is classified as a spectral class A star (A-type (White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.47, 81 Tau 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-white hue, which corresponds to a B-V color index of +0.258.
Physical Properties
| Spectral Class | Class A — A-type (White) |
| Color Index (B−V) | 0.258 |
Observation
| Apparent Magnitude | +5.47 |
| Absolute Magnitude | 2.21 |
| Distance | 147 ly |
| Constellation | Taurus |
Position
| Right Ascension | 4h 30.65m |
| Declination | 15° 41.51′ |
Frequently Asked Questions
What type of star is 81 Tau?
81 Tau is a Class A — A-type (White) star.
How far is 81 Tau from Earth?
81 Tau is approximately 146.5 light-years from Earth.
Can you see 81 Tau with the naked eye?
With an apparent magnitude of 5.47, 81 Tau is visible to the naked eye.
What constellation is 81 Tau in?
81 Tau is located in the constellation Taurus.