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Alpha Cir

HIP 71908; Alpha Cir DoubleStar Cir Visible Level 3 Medium telescope (6-8") - Requires steady seeing
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Physical Properties

Magnitude 3.19
Spectral Type A7VpSrCrEu Kn
Star Color Yellow-white (B-V 0.24)
Distance 54.0 ly

Position & Identifiers

RA 14h 42m 30.4s
Dec -64° 58' 31.0"
Constellation Cir
HR 5463
HIP 71908
Bayer Alpha
Variable ID Alp Cir

Visibility

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Multiple Star System

Separation 15.7″
Companion Mag 8.5
Position Angle 224°
Star Colors A: Yellow-white
Discoverer DUN 166

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 224° A (3.2) B (8.5)

Sep: 15.7″ · PA: 224° · 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

Amp. 0.03V. Magnetic var., about 4 months. Pulsation period 6.8 min?
Binary. Companion K5V.
Also classified F1Vp.
0.074".

Survey Image

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