Eta CrB
HIP 75312; Eta CrB; 2 CrB
HIP 75312; Eta CrB; 2 CrB
DoubleStar
CrB
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
5.58
Spectral Type
G0V
Star Color
Yellow
(B-V 0.58)
Distance
53.5 ly
Position & Identifiers
RA
15h 23m 12.3s
Dec
+30° 17' 16.0"
Constellation
CrB
HR
5727
HIP
75312
Bayer
Eta
Flamsteed
2 CrB
Double Cat
9617
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
0.7″
Companion Mag
6.0
Companion Sp
G0V
Position Angle
356°
Star Colors
A: Yellow
B: Yellow
Discoverer
STF1937
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.7″ · PA: 356° · 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
Blend of 5727/8, 4.94 - 5.02V. Uncertain which component is the variable.
AB 5.62 G1V, 5.89 G3V, 41.623y, a = 0.907". B is HR 5728. Colors for combined images. Mag. for blend 4.98V. Masses | 0.95 and 0.94 solar. C, 13.4v at 58" optical; D, 11v at 215" probably optical.
ADS 9617A, 41.56y D, K 4.5k/s, V0 -6.0k/s, asini 904.
UMa cluster; Sirius group? UMa stream.
0.054".
Survey Image
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