HIP 21408
HIP 21408
DoubleStar
Tau
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
6.36
Spectral Type
G5II-III+A-F
Position & Identifiers
RA
04h 35m 42.7s
Dec
+19° 52' 54.0"
Constellation
Tau
HR
1455
HIP
21408
Double Cat
3316
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Visibility
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Multiple Star System
Separation
0.1″
Companion Mag
7.4
Position Angle
134°
Discoverer
L 4
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.1″ · PA: 134° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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Stellar Lifecycle
Spectral Classification
Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
Visual duplicity questioned. Unresolved by speckle interferometry 1983.93.
Survey Image
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