47 Dra
Observable Double Star
Good (58/100)
Sep: 37.6", Companion: mag 8.3
HIP 92512; 47 Dra
DoubleStar
Dra
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.66
Spectral Type
G9IIIFe-0.5
Star Color
Red
(B-V 1.19)
Distance
543.6 ly
Position & Identifiers
RA
18h 51m 12.1s
Dec
+59° 23' 18.0"
Constellation
Dra
HR
7125
HIP
92512
Flamsteed
47 Dra
Variable ID
Omi Dra
Double Cat
11779
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
37.6″
Companion Mag
8.3
Position Angle
316°
Star Colors
A: Red
Discoverer
STF2420
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 37.6″ · PA: 316° · 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
B is K3IIIp optical, vsini =<54k/s. C, 11.5v at 139" is receding from A.
ADS 11799A, 138.420d, K 23.5k/s, V0 -19.5k/s, asini 44.5. Companion possibly early type.
Survey Image
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