HIP 20842
HIP 20842
DoubleStar
Tau
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.72
Spectral Type
Am
Star Color
Yellow-white
(B-V 0.27)
Position & Identifiers
RA
04h 28m 00.8s
Dec
+21° 37' 12.0"
Constellation
Tau
HR
1403
HIP
20842
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Visibility
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Multiple Star System
Components
3
Component IDs
A
Separation
167.7″
Companion Mag
11.4
Position Angle
237°
Star Colors
A: Yellow-white
Discoverer
BUP 60
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 167.7″ · PA: 237° · 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
Primary is SB, 6.2, 7.0v, sep. 0.01". Visual secondary is 10.5v at 161", probably optical.
In Taurus cluster; Mel 25 #67; the Hyades.
Survey Image
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