目前位置
| 屬性 | 數值 |
|---|---|
| Right Ascension (J2000) | 02h31m53s |
| Declination (J2000) | +89°15'50" |
| Altitude | 39.50° |
| Azimuth | 0.60° |
| Hour Angle | -8h41m53s |
| Constellation | Ursa Minor |
| Visibility | naked_eye |
物理特性
| 屬性 | 數值 |
|---|---|
| Visual Magnitude | 1.97 |
| Spectral Class | F8Ib |
| Color Index (B-V) | 0.60 |
| Distance | 433.0 light-years |
| Parallax | 7.56 mas |
| Proper Motion (RA) | 44.22 mas/yr |
| Proper Motion (Dec) | -11.74 mas/yr |
| Radial Velocity | -17.0 km/s |
星表編號
| 目錄 | 編號 |
|---|---|
| Hipparcos (HIP) | 11767 |
| Bright Star Catalogue (HR) | 424 |
| Henry Draper (HD) | 8890 |
| SAO | 308 |
| Bayer Designation | α UMi |
| Flamsteed Designation | 1 UMi |
升起、落下與過中天
| 事件 | 時間 / 數值 |
|---|---|
| Status | Circumpolar (always above horizon) |
| Transit Time | 10:52 (altitude: 40.6°) |