66 Tau
HIP 20522; 66 Tau
DoubleStar
Tau
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
5.12
Spectral Type
A3V
Star Color
White
(B-V 0.07)
Distance
3261.6 ly
Position & Identifiers
RA
04h 23m 51.9s
Dec
+09° 27' 39.0"
Constellation
Tau
HR
1381
HIP
20522
Flamsteed
66 Tau
Double Cat
3182
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Visibility
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Multiple Star System
Separation
0.3″
Companion Mag
5.9
Companion Sp
A1V
Position Angle
35°
Star Colors
A: White
B: White
Discoverer
HU 304
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.3″ · PA: 35° · 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
5.8 A3V, 5.9 A4V, 51.6y, a = 0.18", or 55.40y, a = 0.20".
UMa stream.
0.007".
Survey Image
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