V1768 Cyg
HIP 98863
DoubleStar
Cyg
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
5.64
Range
5.56 - 5.70
Period
22.7 hours
Variable Type
ACYG
Spectral Type
B1.5Ia
Star Color
Yellow
(B-V 0.54)
Position & Identifiers
RA
20h 04m 36.1s
Dec
+32° 13' 07.0"
Constellation
Cyg
HR
7678
HIP
98863
Variable ID
V1768 Cyg
Double Cat
13335
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Visibility
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Light Curve
Multiple Star System
Separation
32.9″
Companion Mag
10.5
Position Angle
9°
Star Colors
A: Yellow
B: Red
Discoverer
HJ 1471
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 32.9″ · PA: 9° · 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 Fusion
Stellar Notes
Amp. 0.08B, about 26d. Mass loss 0.00005 solar masses/y.
Optical companion, +0.74(B-V), +0.34(U-B).
Vul OB2; in reflection nebula; member assoc. Cyg R1 at 1000 pc.
Shell star.
Survey Image
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