68 Cyg
HIP 105186; 68 Cyg
DoubleStar
Cyg
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
5.00
Spectral Type
O7.5III:n((f))
Star Color
Blue-white
(B-V -0.01)
Position & Identifiers
RA
21h 18m 27.2s
Dec
+43° 56' 45.0"
Constellation
Cyg
HR
8154
HIP
105186
Flamsteed
68 Cyg
Variable ID
V1809 Cyg
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Visibility
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Multiple Star System
Separation
3.8″
Companion Mag
14.0
Position Angle
81°
Star Colors
A: Blue-white
Discoverer
TRN 32
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 3.8″ · PA: 81° · 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
5.05 - 5.075V, 3.390d.
Cyg OB7; exciting star of HII region S119. Runaway star from Cep OB2 association?
Also classified O8V and O8III((f)). H alpha emission moderately intense 1959 to 1970; absorption increasing 1973-1976.
Survey Image
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