46 Dra
HIP 91755; 46 Dra
DoubleStar
Dra
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.04
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
B9.5pHg:
Star Color
Blue-white
(B-V -0.09)
Distance
296.5 ly
Position & Identifiers
RA
18h 42m 37.9s
Dec
+55° 32' 22.0"
Constellation
Dra
HR
7049
HIP
91755
Flamsteed
46 Dra
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
146.5″
Companion Mag
11.0
Position Angle
156°
Star Colors
A: Blue-white
Discoverer
H 6 37
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 146.5″ · PA: 156° · 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
Alpha CV?, 5.04 - 5.05V.
Primary of visual double, 9.8107d, K 25.1k/s, V0 -31.0k/s, msin3i 0.0843, asini 3.32. Both components of SB are | peculiar A-type stars but dissimilar. Both vsini =<5k/s.
Pleiades group.
HgMn star. The components both show HgII but only the primary shows MnII. Overabundant Sr, Y, Zr, Pt, and Hg. Primary | also overabundant Mn and Ga. Both 46 Dra A and 46 Dra B are manganese stars.
Survey Image
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