57 Per
HIP 21242; 57 Per
DoubleStar
Per
Visible
Level 1
Naked eye / Binoculars - Requires steady seeing
Physical Properties
Magnitude
6.09
Spectral Type
F0V
Star Color
Yellow-white
(B-V 0.38)
Position & Identifiers
RA
04h 33m 24.9s
Dec
+43° 03' 50.0"
Constellation
Per
HR
1434
HIP
21242
Flamsteed
57 Per
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
121.5″
Companion Mag
6.8
Position Angle
197°
Star Colors
A: Yellow-white
B: Yellow
Discoverer
SHJ 44
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 121.5″ · PA: 197° · 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.
Survey Image
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