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HIP 6868 — Double Star in Pisces

Magnitude 6.2m DoubleStar Pisces (Psc) Visible
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1Physical Properties

Magnitude 6.20
Spectral Type K1III giant
Star Color Orange (B-V 1.12)

2Position & Identifiers

RA 01h 28m 22.9s
Dec +07° 57' 41.0"
Constellation Pisces (Psc)
HR 426
HIP 6868
HD 8949
SAO 109907

3How easy to split?

Primary 6.2 mag Companion 8.0 mag Separation 68.9″
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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 Sep – Nov (peak: Oct)

5Multiple Star System

Separation 68.9″
Companion Mag 8.0
Position Angle 100°
Star Colors A: Orange
Discoverer S 398
CPM. Component B is BD+7d214, 8.02V, +0.53(B-V), +0.06(U-B), G0.

Separation over time

Measured 1825 → 2018 (193 y)
Separation drift 69.8" → 68.9" (-0.90")
Rate -0.0047" / y
PA drift 98° → 100° (+2°, +0.010°/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 100°

A: 6.2 · B: 8.0 · Sep: 68.9″ · PA: 100° · 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

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

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Stellar Fusion

Nearby in the Sky

Other targets within a few degrees — pan your scope a little and keep exploring.

Visibility scores assume a 150 mm Newton at Bortle 4.

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