121 Tau
121 Tau
121 Tau is a B-type (Blue-White) star located in the constellation Taurus. It carries the designation 121 Tau.
Located approximately 552.8 light-years from Earth, 121 Tau resides within the broader disk of our Milky Way galaxy.
121 Tau is classified as a spectral class B star (B-type (Blue-White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.37, 121 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 hue, which corresponds to a B-V color index of -0.092.
Physical Properties
| Spectral Class | Class B — B-type (Blue-White) |
| Color Index (B−V) | -0.092 |
Observation
| Apparent Magnitude | +5.37 |
| Absolute Magnitude | -0.78 |
| Distance | 553 ly |
| Constellation | Taurus |
Position
| Right Ascension | 5h 35.45m |
| Declination | 24° 2.38′ |
Frequently Asked Questions
What type of star is 121 Tau?
121 Tau is a Class B — B-type (Blue-White) star.
How far is 121 Tau from Earth?
121 Tau is approximately 552.8 light-years from Earth.
Can you see 121 Tau with the naked eye?
With an apparent magnitude of 5.37, 121 Tau is visible to the naked eye.
What constellation is 121 Tau in?
121 Tau is located in the constellation Taurus.