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HIP 16587 — Double Star in Camelopardalis

Magnitude 6.4m DoubleStar Camelopardalis (Cam) Visible
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1Physical Properties

Magnitude 6.40
Spectral Type A4III giant
Star Color White (B-V 0.14)
Distance 362 ly

2Position & Identifiers

RA 03h 33m 32.1s
Dec +58° 45' 54.0"
HR 1068
HIP 16587
HD 21769
SAO 24093
Double Cat 2592

3How easy to split?

Primary 6.4 mag Companion 7.7 mag Separation 20.5″
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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 Oct – Dec (peak: Nov)

5Multiple Star System Triple C: optical

Components 3 (triple)
Component IDs AB
Separation 20.5″
Companion Mag 7.7
Position Angle 245°
Star Colors A: White B: Yellow-white
Discoverer STF 396
AB CPM. B, spectral class F2V. Component C, 10.5v at 164".

Separation over time

Measured 1829 → 2019 (190 y)
Separation drift 20.4" → 20.5" (+0.10")
Rate +0.0005" / y
PA drift 242° → 245° (+3°, +0.016°/y)

Essentially fixed on human timescales — the same view your grandchildren will see.

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 245°

A: 6.4 · B: 7.7 · Sep: 20.5″ · PA: 245° · N up, E right

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

Explore

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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

11

Blackbody Spectrum

12

Stellar Absorption Spectrum

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

13

Stellar Fusion

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14Stellar Notes

Also classified Am(A3/A7/F0).
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Light Travel Time Machine

16

Relativistic Travel

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