17 CMa
Observable Double Star
Excellent (60/100)
Sep: 42.5", Companion: mag 8.7
HIP 33248; 17 CMa
DoubleStar
CMa
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
5.74
Spectral Type
A3IV
Star Color
White
(B-V 0.08)
Position & Identifiers
RA
06h 55m 02.7s
Dec
-20° 24' 17.0"
Constellation
CMa
HR
2588
HIP
33248
Flamsteed
17 CMa
Double Cat
5585
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Visibility
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Multiple Star System
Components
4
Component IDs
AC
Separation
42.5″
Companion Mag
8.7
Position Angle
148°
Star Colors
A: White
B: Yellow
Discoverer
H 5 65
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 42.5″ · PA: 148° · 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 B is 9.3v K5 at 44"; D, 9.5 at 130".
See HR 2571.
Survey Image
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