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HIP 41325 — Double Star in Cancer

Magnitude 5.1m DoubleStar Cancer (Cnc) Visible
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Observe

1Physical Properties

Magnitude 5.13
Spectral Type G7II-IIIFe-1 bright giant
Star Color Orange (B-V 0.94)
Distance 204 ly

2Position & Identifiers

RA 08h 25m 54.8s
Dec +07° 33' 52.0"
Constellation Cancer (Cnc)
HR 3306
HIP 41325
HD 71115
SAO 116752
Double Cat 6805

3How easy to split?

Primary 5.1 mag Companion 10.2 mag Separation 29.2″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Medium Medium Hard+
150mm Newt. Easy Medium+ Medium+
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 Dec – Feb (peak: Jan)

5Multiple Star System

Separation 29.2″
Companion Mag 10.2
Position Angle 344°
Star Colors A: Orange
Discoverer H 5 109

Separation over time

Measured 1782 → 2015 (233 y)
Separation drift 35.4" → 29.2" (-6.20")
Rate -0.0266" / y
PA drift 325° → 344° (+19°, +0.082°/y)

Apparent motion is significant on a human timescale — worth revisiting in a decade.

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 344°

A: 5.1 · B: 10.2 · Sep: 29.2″ · PA: 344° · N up, E right

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

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Size Comparison

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Spectral Classification

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Hertzsprung-Russell Diagram

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Stellar Lifecycle

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Blackbody Spectrum

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Stellar Absorption Spectrum

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Stellar Fusion

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Relativistic Travel

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