21 Ari
21 Ari
21 Ari is a F-type (Yellow-White) star. It carries the designation 21 Ari.
Located approximately 166.6 light-years from Earth, 21 Ari resides within the broader disk of our Milky Way galaxy.
21 Ari is classified as a spectral class F star (F-type (Yellow-White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.57, 21 Ari 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 white hue, which corresponds to a B-V color index of +0.520.
Physical Properties
| Spectral Class | Class F — F-type (Yellow-White) |
| Color Index (B−V) | 0.520 |
Observation
| Apparent Magnitude | +5.57 |
| Absolute Magnitude | 2.03 |
| Distance | 167 ly |
Position
| Right Ascension | 2h 15.71m |
| Declination | 25° 2.58′ |
Frequently Asked Questions
What type of star is 21 Ari?
21 Ari is a Class F — F-type (Yellow-White) star.
How far is 21 Ari from Earth?
21 Ari is approximately 166.6 light-years from Earth.
Can you see 21 Ari with the naked eye?
With an apparent magnitude of 5.57, 21 Ari is visible to the naked eye.