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41 Draconis — Double Star in Draco

Observable Double Star Excellent (70/100)

Sep: 18.6", Companion: mag 6.0

Magnitude 5.7m DoubleStar Draco (Dra) Visible
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Observe

1Physical Properties

Magnitude 5.68
Spectral Type F7
Star Color Yellow (B-V 0.50)
Distance 130 ly

2Position & Identifiers

RA 18h 00m 09.2s
Dec +80° 00' 15.0"
Constellation Draco (Dra)
HR 6810
HIP 88136
HD 166866
SAO 8996
Flamsteed 41 Dra
Double Cat 11061

3How easy to split?

Primary 5.7 mag Companion 6.0 mag Separation 18.6″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Easy Easy Easy
150mm Newt. Easy Easy Easy
C8 203mm Easy Easy Easy
Easy Medium Hard Very hard Impossible

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

4Visibility

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Best season May – Jul (peak: Jun)

5Multiple Star System Triple C: optical

Components 3 (triple)
Component IDs AB
Separation 18.6″
Companion Mag 6.0
Companion Sp F7V
Position Angle 232°
Star Colors A: Yellow B: Yellow
Discoverer STF2308
Binary with HR 6809. Faint component C at 221".

Separation over time

Measured 1782 → 2023 (241 y)
Separation drift 20.7" → 18.6" (-2.10")
Rate -0.0087" / y
PA drift 235° → 232° (-3°, -0.012°/y)

Slow change over generations — observable in lifetime comparisons.

Measured from the WDS observational archive. No orbital solution has been derived — most likely the period is too long to fit an orbit to the available measurement arc.

Eyepiece View

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80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 232°

A: 5.7 · B: 6.0 · Sep: 18.6″ · PA: 232° · N up, E right

Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″

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