Polaris
1Alp UMi
Polaris is a F-type (Yellow-White) star. It carries the designation 1Alp UMi.
Located approximately 432.6 light-years from Earth, Polaris resides within the broader disk of our Milky Way galaxy.
Polaris is classified as a spectral class F star (F-type (Yellow-White)) on the Harvard spectral classification system.
Polaris has an apparent magnitude of +1.97, making it a bright and prominent star that is readily visible to the naked eye. It is one of the more conspicuous stars in its region of the sky. Observers will note its yellow-white hue, which corresponds to a B-V color index of +0.636.
物理特性
| 光谱类型 | Class F — F-type (Yellow-White) |
| 色指数 (B−V) | 0.636 |
观测
| 视星等 | +1.97 |
| 绝对星等 | -3.64 |
| 距离 | 433 ly |
位置
| 赤经 | 2h 31.79m |
| 赤纬 | 89° 15.85′ |
Related Chemistry
Explore the chemical elements connected to Polaris on our sister site ChemFYI.
Hydrogen lines still prominent in F-type supergiant spectra
Helium from core fusion, now in evolved shell-burning phase
Metallic absorption lines strengthen in F-type stars
Ca II H & K lines become visible in late-F spectra
Part of the Science FYI Family