21 Vir
21 Vir
21 Vir is a A-type (White) star located in the constellation Virgo. It carries the designation 21 Vir.
Located approximately 258.4 light-years from Earth, 21 Vir resides within the broader disk of our Milky Way galaxy.
21 Vir is classified as a spectral class A star (A-type (White)) on the Harvard spectral classification system.
With an apparent magnitude of +5.48, 21 Vir 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 -0.035.
物理特性
| 光谱类型 | Class A — A-type (White) |
| 色指数 (B−V) | -0.035 |
观测
| 视星等 | +5.48 |
| 绝对星等 | 0.98 |
| 距离 | 258 ly |
| 星座 | Virgo |
位置
| 赤经 | 12h 33.78m |
| 赤纬 | -9° 27.12′ |
常见问题
What type of star is 21 Vir?
21 Vir is a Class A — A-type (White) star.
How far is 21 Vir from Earth?
21 Vir is approximately 258.4 light-years from Earth.
Can you see 21 Vir with the naked eye?
With an apparent magnitude of 5.48, 21 Vir is visible to the naked eye.
What constellation is 21 Vir in?
21 Vir is located in the constellation Virgo.