Rastaban
HIP 85670; Beta Dra; 23 Dra
HIP 85670; Beta Dra; 23 Dra
DoubleStar
Dra
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
2.79
Spectral Type
G2Ib-IIa
Star Color
Orange
(B-V 0.98)
Distance
380.1 ly
Position & Identifiers
RA
17h 30m 26.0s
Dec
+52° 18' 05.0"
Constellation
Dra
HR
6536
HIP
85670
Bayer
Beta
Flamsteed
23 Dra
Double Cat
10611
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
4.6″
Companion Mag
14.0
Position Angle
17°
Star Colors
A: Orange
Discoverer
BU 1090
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 4.6″ · PA: 17° · 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
Unusually broad He 10830.
Rastaban; Alwaid; Asuia; Rastaben.
Survey Image
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