Altair

α Aql

A7V Aquila Mag 0.76

Current Visibility

ความสูง

56.4°

อะซิมุท

153.3°

bright

Current Position

PropertyValue
Right Ascension (J2000)19h50m47s
Declination (J2000)+08°52'12"
Altitude56.42°
Azimuth153.27°
Hour Angle00h02m56s
ConstellationAquila
Visibilitybright

Physical Properties

PropertyValue
Visual Magnitude0.76
Spectral ClassA7V
Color Index (B-V)0.22
Distance16.7 light-years
Parallax194.44 mas
Proper Motion (RA)536.82 mas/yr
Proper Motion (Dec)385.54 mas/yr
Radial Velocity-26.1 km/s

Catalog Designations

แคตตาล็อกDesignation
Hipparcos (HIP)97649
Bright Star Catalogue (HR)7557
Henry Draper (HD)187642
SAO125122
Bayer Designationα Aql
Flamsteed Designation53 Aql

Rise, Set & Transit

เหตุการณ์ท้องฟ้าTime / Value
Rise Time21:04
Transit Time03:41 (altitude: 59.0°)
Set Time10:13