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HIP 37819 — Star in Puppis

Magnitude 3.6m Star Puppis (Pup) Visible
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1Physical Properties

Magnitude 3.61
Range 3.58 - 3.62
Variable Type LC
Spectral Type K4 III giant
Star Color Orange (B-V 1.73) (reddened by dust)
Distance 1,086 ly

2Position & Identifiers

RA 07h 45m 15.3s
Dec -37° 58' 07.0"
Constellation Puppis (Pup)
HR 3017
HIP 37819
HD 63032
SAO 198398
SIMBAD

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Easy 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

Compare Stars

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

NGC 2451 #254; membership questioned.
Called c Pup in Argelander, Norton and most modern catalogues, this was originally called b Pup by Lacaille (1763).
16

Light Travel Time Machine

17

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 2451
Easy
Scattered bright open cluster
Open Cluster mag 2.8 0.0° Puppis
V336 Pup
Easy
Colorful double, sep 26.5″
Double Star mag 5.52 4.7° Puppis
L2 Pup
Easy
Mira-type variable, range 2.6–6.2
Variable Star mag 5.10 8.9° Puppis
NGC 2328
Hard+
Elliptical galaxy
Galaxy mag 12.55 9.1° Puppis
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