Delta Tau
HIP 20542; Delta2 Tau; 64 Tau
HIP 20542; Delta2 Tau; 64 Tau
DoubleStar
Tau
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.80
Spectral Type
A7V
Star Color
Yellow-white
(B-V 0.15)
Distance
191.9 ly
Position & Identifiers
RA
04h 24m 05.8s
Dec
+17° 26' 38.0"
Constellation
Tau
HR
1380
HIP
20542
Bayer
Delta2
Flamsteed
64 Tau
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Visibility
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Multiple Star System
Separation
147.2″
Companion Mag
14.7
Position Angle
249°
Star Colors
A: Yellow-white
B: Yellow-white
Discoverer
BUP 56
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 147.2″ · PA: 249° · 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
In Taurus cluster; Mel 25 #47; the Hyades.
Survey Image
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