17 Dra
Observable Double Star
Excellent (63/100)
Sep: 3.0", Companion: mag 6.4
HIP 81292; 17 Dra
DoubleStar
Dra
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.08
Spectral Type
B9V
Star Color
Blue-white
(B-V -0.04)
Distance
326.2 ly
Position & Identifiers
RA
16h 36m 13.7s
Dec
+52° 55' 28.0"
Constellation
Dra
HR
6185
HIP
81292
Flamsteed
17 Dra
Double Cat
10129
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Visibility
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Multiple Star System
Components
4
Component IDs
AC
Separation
3.0″
Companion Mag
6.4
Position Angle
104°
Star Colors
A: Blue-white
B: Blue-white
Discoverer
STF2078
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 3.0″ · PA: 104° · N up, E left
At limit · 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
AB binary with HR 6186 = component D; combined colors, combined mag. 5.08, B8V, A1V. Component C = HR 6184 CPM.
Survey Image
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