Nu CrB
HIP 80197; Nu CrB; 20 CrB
Observable Double Star
Excellent (62/100)
Sep: 356.1", Companion: mag 5.6
HIP 80197; Nu CrB; 20 CrB
DoubleStar
CrB
Visible
Level 1
Naked eye / Binoculars - Requires steady seeing
Physical Properties
Magnitude
5.20
Spectral Type
M2IIIab
Star Color
Red
(B-V 1.60)
Distance
1087.2 ly
Position & Identifiers
RA
16h 22m 21.4s
Dec
+33° 47' 57.0"
Constellation
CrB
HR
6107
HIP
80197
Bayer
Nu
Flamsteed
20 CrB
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
356.1″
Companion Mag
5.6
Position Angle
164°
Star Colors
A: Red
Discoverer
STFA 29
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 356.1″ · PA: 164° · 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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