Asellus Borealis
HIP 42806; Gamma Cnc; 43 Cnc
HIP 42806; Gamma Cnc; 43 Cnc
DoubleStar
Cnc
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.66
Spectral Type
A1IV
Star Color
White
(B-V 0.02)
Distance
203.8 ly
Position & Identifiers
RA
08h 43m 17.1s
Dec
+21° 28' 07.0"
Constellation
Cnc
HR
3449
HIP
42806
Bayer
Gamma
Flamsteed
43 Cnc
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Visibility
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Multiple Star System
Components
5
Component IDs
AB
Separation
115.9″
Companion Mag
10.2
Companion Sp
G5
Position Angle
67°
Star Colors
A: White
B: Orange
Discoverer
ENG 38
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 115.9″ · PA: 67° · 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
Component A suspected occultation double. Three visual companions.
Hyades group.
Asellus Borealis.
Survey Image
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