47 Tau
Observable Double Star
Fair (27/100)
Sep: 1.3", Companion: mag 7.3
HIP 19740; 47 Tau
DoubleStar
Tau
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
4.84
Spectral Type
G5III+A7V?
Star Color
Orange
(B-V 0.80)
Distance
112.5 ly
Position & Identifiers
RA
04h 13m 56.4s
Dec
+09° 15' 49.0"
Constellation
Tau
HR
1311
HIP
19740
Flamsteed
47 Tau
Double Cat
3072
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
1.3″
Companion Mag
7.3
Companion Sp
A8V
Position Angle
339°
Star Colors
A: Orange
B: Yellow-white
Discoverer
BU 547
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 1.3″ · PA: 339° · N up, E left
Unresolved · 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
AB binary; C, 12v at 32" optical.
Hyades?
0.003".
Survey Image
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