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HIP 25482 — Double Star in Dorado

Magnitude 6.0m DoubleStar Dorado (Dor) Visible
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1Physical Properties

Magnitude 6.03
Spectral Type F0IV-V subgiant
Star Color Yellow-white (B-V 0.34)
Distance 272 ly

2Position & Identifiers

RA 05h 27m 00.0s
Dec -68° 37' 22.0"
Constellation Dorado (Dor)
HR 1859
HIP 25482
HD 36584
SAO 249281
SIMBAD

3How easy to split?

Primary 6.0 mag Companion 7.0 mag Separation 1.5″
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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Hard Hard Hard
150mm Newt. Medium Medium Medium
C8 203mm Medium+ Medium+ Medium+
Easy Medium Hard Very hard Impossible

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

4Visibility

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Best season Nov – Jan (peak: Dec)

5Multiple Star System

Separation 1.5″
Companion Mag 7.0
Position Angle 159°
Star Colors A: Yellow-white B: Yellow
Discoverer I 276

Separation over time

Period: 795.5 y Eccentricity: 0.887 Now: 1.5", PA 157° + 0.03" in 5 years
0.00" 0.47" 0.93" 1.4" 1.9" 2025 2030 2035 2040 2045 1.5"

Apparent separation over time, computed from ORB6 orbital elements. Steep curves indicate fast-changing pairs — catch them while they're splittable.

Eyepiece View

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80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 159°

A: 6.0 · B: 7.0 · Sep: 1.5″ · PA: 159° · N up, E right

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

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6

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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14

Light Travel Time Machine

15

Relativistic Travel

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.

NGC 1966
Medium
Open cluster
Open Cluster mag 11.83 0.2° Dorado
NGC 1953
Hard+
Compact globular cluster
Globular Cluster mag 11.74 0.3° Dorado
IC 2128
Hard+
Diffuse nebula
Diffuse Nebula mag 11.10 0.7° Dorado
Tarantula Nebula
NGC 2070
Medium+
Emission nebula — try an OIII filter
Emission Nebula mag 8.0 1.2° Dorado
Theta Ret
Easy
Easy double, sep 4.1″
Double Star mag 5.87 8.8° Reticulum
Show on Map

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