Alpha Ara
HIP 85792; Alpha Ara
DoubleStar
Ara
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
2.95
Spectral Type
B2Ve
Star Color
Blue
(B-V -0.17)
Distance
265.8 ly
Position & Identifiers
RA
17h 31m 50.5s
Dec
-49° 52' 34.0"
Constellation
Ara
HR
6510
HIP
85792
Bayer
Alpha
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Visibility
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Multiple Star System
Separation
48.7″
Companion Mag
11.1
Position Angle
167°
Star Colors
A: Blue
Discoverer
HJ 4955
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 48.7″ · PA: 167° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
2.76 - 2.90V.
Companion K0IV, optical.
Cas-Tau group; member of the local association (Pleiades group); Sco-Cen assoc.; probable member of Sco-Cen cluster.
Shell star with variable H alpha emission.
Survey Image
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