OS Pup

Observable Double Star Good (55/100)

Sep: 66.8", Companion: mag 6.0

HIP 40321 DoubleStar Pup Visible Level 1 Naked eye / Binoculars - Requires steady seeing

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Physical Properties

Magnitude 5.08

Spectral Type B1.5IV

Star Color Blue (B-V -0.19)

Position & Identifiers

RA 08h 13m 58.4s

Dec -36° 19' 21.0"

Constellation Pup

HR 3240

HIP 40321

Variable ID OS Pup

Visibility

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Multiple Star System

Separation 66.8″

Companion Mag 6.0

Position Angle 176°

Star Colors A: Blue B: Blue-white

Discoverer DUN 67

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 66.8″ · PA: 176° · N up, E left

Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″

Size Comparison

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Stellar Lifecycle

Spectral Classification

Hertzsprung-Russell Diagram

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Blackbody Spectrum

Stellar Absorption Spectrum

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

Stellar Notes

Variable Star

4.60 - 4.71p.

Survey Image

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