T Cyg
HIP 102571
DoubleStar
Cyg
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.92
Variable Type
Slow Irregular Variable
Spectral Type
K3III
Star Color
Red
(B-V 1.32)
Distance
652.3 ly
Position & Identifiers
RA
20h 47m 10.8s
Dec
+34° 22' 27.0"
Constellation
Cyg
HR
7956
HIP
102571
Variable ID
T Cyg
Double Cat
14290
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
10.0″
Companion Mag
10.0
Position Angle
120°
Star Colors
A: Red
Discoverer
BU 677
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 10.0″ · PA: 120° · 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
ADS 14290A, Lb? 4.91 - 4.96V.
AB CPM. B, 10.03V, +1.27(B-V), +0.66(U-B). C, 13v at 14" optical.
Survey Image
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