Alphard
HIP 46390; Alpha Hya; 30 Hya
HIP 46390; Alpha Hya; 30 Hya
DoubleStar
Hya
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
1.98
Spectral Type
K3IIIa
Star Color
Red
(B-V 1.44)
Distance
180.3 ly
Position & Identifiers
RA
09h 27m 35.2s
Dec
-08° 39' 31.0"
Constellation
Hya
HR
3748
HIP
46390
Bayer
Alpha
Flamsteed
30 Hya
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
284.4″
Companion Mag
9.7
Position Angle
155°
Star Colors
A: Red
Discoverer
H 6 111
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 284.4″ · PA: 155° · 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
Balloon-borne spectrometer revealed pronounced emission of MgII.
ALPHARD; Alfard; Alphart; Kalbelaphard; Cor Hydrae.
Survey Image
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