目前位置
| 屬性 | 數值 |
|---|---|
| Right Ascension (J2000) | 18h36m56s |
| Declination (J2000) | +38°47'06" |
| Altitude | 48.77° |
| Azimuth | 286.58° |
| Hour Angle | 03h37m36s |
| Constellation | Lyra |
| Visibility | bright |
物理特性
| 屬性 | 數值 |
|---|---|
| Visual Magnitude | 0.03 |
| Spectral Class | A0V |
| Color Index (B-V) | 0.00 |
| Distance | 25.0 light-years |
| Parallax | 128.93 mas |
| Proper Motion (RA) | 201.02 mas/yr |
| Proper Motion (Dec) | 287.46 mas/yr |
| Radial Velocity | -13.9 km/s |
星表編號
| 目錄 | 編號 |
|---|---|
| Hipparcos (HIP) | 91262 |
| Bright Star Catalogue (HR) | 7001 |
| Henry Draper (HD) | 172167 |
| SAO | 67174 |
| Bayer Designation | α Lyr |
| Flamsteed Designation | 3 Lyr |
升起、落下與過中天
| 事件 | 時間 / 數值 |
|---|---|
| Rise Time | 20:31 |
| Transit Time | 05:27 (altitude: 88.9°) |
| Set Time | 14:20 |