57 Cnc
Observable Double Star
Fair (33/100)
Sep: 1.5", Companion: mag 6.4
HIP 43721; 57 Cnc
DoubleStar
Cnc
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
5.39
Spectral Type
G7III
Star Color
Orange
(B-V 1.05)
Distance
652.3 ly
Position & Identifiers
RA
08h 54m 14.7s
Dec
+30° 34' 46.0"
Constellation
Cnc
HR
3532
HIP
43721
Flamsteed
57 Cnc
Double Cat
7071
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
1.5″
Companion Mag
6.4
Position Angle
310°
Star Colors
A: Orange
Discoverer
STF1291
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 1.5″ · PA: 310° · N up, E left
Unresolved · 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
AB binary. B is K0.
See HR 3464.
Survey Image
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