Nodus Secundus
HIP 94376; Delta Dra; 57 Dra
HIP 94376; Delta Dra; 57 Dra
DoubleStar
Dra
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.07
Spectral Type
G9III
Star Color
Orange
(B-V 1.00)
Distance
101.9 ly
Position & Identifiers
RA
19h 12m 33.3s
Dec
+67° 39' 42.0"
Constellation
Dra
HR
7310
HIP
94376
Bayer
Delta
Flamsteed
57 Dra
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Visibility
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Multiple Star System
Separation
80.4″
Companion Mag
12.6
Position Angle
341°
Star Colors
A: Orange
Discoverer
BUP 186
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 80.4″ · PA: 341° · 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
Nodus Secundus; Altais; Aldib, a name corresponding to a group rather than to a single star.
Survey Image
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