Sigma CrB
HIP 79607; Sigma CrB; 17 CrB
Observable Double Star
Excellent (69/100)
Sep: 7.3", Companion: mag 6.5
HIP 79607; Sigma CrB; 17 CrB
DoubleStar
CrB
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
5.64
Variable Type
Delta Scuti (Pulsating)
Spectral Type
G0VCaIIe
Star Color
Yellow
(B-V 0.51)
Distance
72.5 ly
Position & Identifiers
RA
16h 14m 40.8s
Dec
+33° 51' 31.0"
Constellation
CrB
HR
6063
HIP
79607
Bayer
Sigma
Flamsteed
17 CrB
Variable ID
TZ CrB
Double Cat
9979
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
7.3″
Companion Mag
6.5
Companion Sp
G1V
Position Angle
240°
Star Colors
A: Yellow
B: Yellow
Discoverer
STF2032
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 7.3″ · PA: 240° · 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
ADS 9979A, Delta Sct, amp. 0.05V, 1.139789d, with possible secondary period of 0.1d. ADS 9979D = NSV 7576, 10.8v | optical, suspected var. in 1868, not confirmed.
AB 5.58 F8V, 6.59 G1V, 1000.0y, a = 6.599". Radio binary: component B is HR 6064. C, 13v at 9" and D, 10.8v at 71" | optical. Also, 12.5v at 633" CPM.
ADS 9979A, mag. diff 0.2, one component the Delta Sct var. 1.1398d, K 60.1k/s, V0 -11.9k/s, msin3i 0.133, | asini 0.942. Both components vsini =<25k/s.
0.048".
Survey Image
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