Tau Hya
HIP 46509; Tau1 Hya; 31 Hya
Observable Double Star
Good (53/100)
Sep: 65.7", Companion: mag 7.3
HIP 46509; Tau1 Hya; 31 Hya
DoubleStar
Hya
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.60
Spectral Type
F6V
Star Color
Yellow
(B-V 0.46)
Distance
45.3 ly
Position & Identifiers
RA
09h 29m 08.9s
Dec
-02° 46' 08.0"
Constellation
Hya
HR
3759
HIP
46509
Bayer
Tau1
Flamsteed
31 Hya
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Visibility
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Multiple Star System
Separation
65.7″
Companion Mag
7.3
Companion Sp
K0
Position Angle
4°
Star Colors
A: Yellow
B: Orange
Discoverer
HJ 1167
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 65.7″ · PA: 4° · 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
CPM.
Survey Image
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