Rasalhague

α Oph

A5III Ophiuchus Mag 2.43

Current Visibility

ความสูง

-65.1°

อะซิมุท

344.0°

below_horizon

Current Position

PropertyValue
Right Ascension (J2000)17h10m22s
Declination (J2000)-15°43'27"
Altitude-65.11°
Azimuth344.01°
Hour Angle11h33m52s
ConstellationOphiuchus
Visibilitybelow_horizon

Physical Properties

PropertyValue
Visual Magnitude2.43
Spectral ClassA5III
Color Index (B-V)0.15
Distance48.6 light-years
Parallax38.77 mas
Proper Motion (RA)41.16 mas/yr
Proper Motion (Dec)97.65 mas/yr
Radial Velocity12.6 km/s

Catalog Designations

แคตตาล็อกDesignation
Hipparcos (HIP)84012
Bright Star Catalogue (HR)6556
Henry Draper (HD)159561
SAO123129
Bayer Designationα Oph
Flamsteed Designation55 Oph

Rise, Set & Transit

เหตุการณ์ท้องฟ้าTime / Value
Rise Time16:48
Transit Time21:56 (altitude: 34.4°)
Set Time03:08