HIP 21670
HIP 21670
DoubleStar
Tau
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.39
Spectral Type
A5m
Star Color
Yellow-white
(B-V 0.26)
Position & Identifiers
RA
04h 39m 06.2s
Dec
+07° 52' 15.0"
Constellation
Tau
HR
1480
HIP
21670
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Visibility
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Multiple Star System
Components
3
Component IDs
AC
Separation
78.4″
Companion Mag
10.9
Position Angle
252°
Star Colors
A: Yellow-white
Discoverer
BUP 67
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 78.4″ · PA: 252° · 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 #107; the Hyades.
Survey Image
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