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HIP 38518 — Star in Puppis

Magnitude 4.2m Star Puppis (Pup) Visible
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1Physical Properties

Magnitude 4.24
Spectral Type B0.5Ib supergiant
Star Color Blue-white (B-V -0.14)

2Position & Identifiers

RA 07h 53m 18.2s
Dec -48° 06' 11.0"
Constellation Puppis (Pup)
HR 3090
HIP 38518
HD 64760
SAO 219111
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium+ Medium+ Medium
50mm finder Easy Easy Easy
150mm scope 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)

5Survey Image

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7

Size Comparison

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8

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9

Spectral Classification

10

Hertzsprung-Russell Diagram

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Read: The Hertzsprung-Russell Diagram — Reading Stars Like a Map
11

Stellar Lifecycle

12

Blackbody Spectrum

13

Stellar Absorption Spectrum

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

14

Stellar Fusion

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15Stellar Notes

Unusually large line-broadening for luminosity Ib.
Early catalogues (Lacaille 1763) called this star R but it is not the var. now named R Pup. Re-named J Pup.

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.

V Pup
Medium
Eclipsing binary, period 1.5d
Variable Star mag 4.41 1.4° Puppis
Collinder 173
Easy
Open cluster
Open Cluster mag 0.6 2.4° Vela
IS Vel
Easy
Hot blue O-type star
Star mag 5.23 2.7° Vela
Gamma Vel
HIP 39953; Gamma1 Velorum
Easy
Easy double, sep 60.9″
Double Star mag 4.27 2.8° Vela
NGC 2502
Medium
Bright spiral galaxy
Galaxy mag 11.96 4.2° Carina
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