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27 Cyg

HIP 99031; 27 Cyg DoubleStar Cyg Visible Level 3 Medium telescope (6-8") - Requires steady seeing
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Physical Properties

Magnitude 5.36
Spectral Type K0IV
Star Color Orange (B-V 0.85)
Distance 101.9 ly

Position & Identifiers

RA 20h 06m 21.8s
Dec +35° 58' 21.0"
Constellation Cyg
HR 7689
HIP 99031
Flamsteed 27 Cyg
Variable ID Var?

Visibility

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Multiple Star System

Components 4
Component IDs AD
Separation 64.9″
Companion Mag 13.8
Position Angle 36°
Star Colors A: Orange
Discoverer BUP 204

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 36° A (5.4) B (13.8)

Sep: 64.9″ · PA: 36° · 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

5.36 - 5.41V.
AD CPM. B, 13.7v at 23"; C, 11.6v at 36".

Survey Image

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