HIP 21972
HIP 21972
DoubleStar
Per
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.87
Spectral Type
B9III
Star Color
White
(B-V 0.02)
Position & Identifiers
RA
04h 43m 21.6s
Dec
+49° 58' 26.0"
Constellation
Per
HR
1493
HIP
21972
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Visibility
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Multiple Star System
Separation
21.7″
Companion Mag
13.1
Position Angle
41°
Star Colors
A: White
Discoverer
KUI 19
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 21.7″ · PA: 41° · 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
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Survey Image
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