HIP 21990
HIP 21990 is a M-type (Red) star.
At a distance of roughly 2,718 light-years, HIP 21990 is a distant star lying deep within the Milky Way galaxy.
HIP 21990 is classified as a spectral class M star (M-type (Red)) on the Harvard spectral classification system.
HIP 21990 has an apparent magnitude of +8.51, placing it beyond naked-eye visibility. A good pair of binoculars or a small telescope is required to observe this star. Observers will note its red hue, which corresponds to a B-V color index of +1.564.
物理的特性
| スペクトル型 | Class M — M-type (Red) |
| 色指数 (B−V) | 1.564 |
観測
| 見かけの等級 | +8.51 |
| 絶対等級 | -1.09 |
| 距離 | 2,718 ly |
位置
| 赤経 | 4h 43.60m |
| 赤緯 | -56° 22.40′ |
よくある質問
What type of star is HIP 21990?
HIP 21990 is a Class M — M-type (Red) star.
How far is HIP 21990 from Earth?
HIP 21990 is approximately 2,718.0 light-years from Earth.
Can you see HIP 21990 with the naked eye?
With an apparent magnitude of 8.51, HIP 21990 is not visible to the naked eye.