39 Cnc
HIP 42516; 39 Cnc
DoubleStar
Cnc
Visible
Level 1
Naked eye / Binoculars - Requires steady seeing
Physical Properties
Magnitude
6.39
Spectral Type
G8III
Star Color
Orange
(B-V 0.98)
Position & Identifiers
RA
08h 40m 06.4s
Dec
+20° 00' 28.0"
Constellation
Cnc
HR
3427
HIP
42516
Flamsteed
39 Cnc
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Visibility
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Multiple Star System
Components
5
Component IDs
AB
Separation
151.8″
Companion Mag
6.6
Position Angle
150°
Star Colors
A: Orange
Discoverer
ENG 37
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 151.8″ · PA: 150° · 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
Components B, 6.60V, +0.01(B-V), +0.03(U-B), A0III at 150", vsini =<40k/s; P, 9.22V, +0.39(B-V), +0.01(U-B) at 134"; and | Q, 8.81V, +0.32(B-V), +0.09(U-B), F2V, at 135", vsini 86k/s, form a physical system with A. B is 40 Cnc; Q is +20d2161.
In Praesepe; NGC 2632 #253.
Also classified K0III.
Survey Image
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