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Kappa Cygni — Star in Cygnus

Magnitude 3.8m Star Cygnus (Cyg) Visible
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1Physical Properties

Magnitude 3.77
Range 3.76 - 3.82
Variable Type SRD:
Spectral Type G9III giant
Star Color Orange (B-V 0.96)
Distance 124 ly

2Position & Identifiers

RA 19h 17m 06.2s
Dec +53° 22' 07.0"
Constellation Cygnus (Cyg)
HR 7328
HIP 94779
HD 181276
SAO 31537
Bayer Kappa
Flamsteed 1 Cyg

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Easy Medium+ Medium+
50mm finder Easy Easy Easy
150mm scope Easy Easy Easy
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

4Visibility

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Best season Jun – Aug (peak: Jul)

5Survey Image

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7

Size Comparison

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8

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9

Spectral Classification

10

Hertzsprung-Russell Diagram

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11

Stellar Lifecycle

12

Blackbody Spectrum

13

Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

14

Stellar Fusion

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15Stellar Notes

SRd?, 3.76 - 3.82V, 79d?
16

Light Travel Time Machine

17

Relativistic Travel

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