NS Puppis

This article is about h¹ Puppis. For other stars with this Bayer designation, see h Puppis. For H Puppis, see HD 53811.

NS Puppis (NS Pup) is an irregular variable star in the constellation Puppis. Its apparent magnitude varies between 4.4 and 4.5.

A light curve for NS Puppis, plotted from Hipparcos data^[7]

NS Puppis

Location of NS Puppis (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Puppis
Right ascension	08h 11m 21.4934s[1]
Declination	−39° 37′ 06.7588″[1]
Apparent magnitude (V)	4.40–4.50[2]
Characteristics
Evolutionary stage	Supergiant
Spectral type	K4.5 Ib[3]
Variable type	Lc[2]
Astrometry
Radial velocity (Rv)	16.20[4] km/s
Proper motion (μ)	RA: −9.072 mas/yr[1] Dec.: 3.211 mas/yr[1]
Parallax (π)	2.3831±0.1188 mas[1]
Distance	1,363+62 −65 ly (418+19 −20 pc)[5]
Details
Mass	8±0.9[6] M☉
Radius	213±24[6] R☉
Luminosity	9,772[6] L☉
Surface gravity (log g)	0.73±0.02[6] cgs
Temperature	3,961±125[6] K
Other designations
h1 Pup, CD−39°4084, HD 68553, HIP 40091, HR 3225, SAO 198908
Database references
SIMBAD	data

NS Puppis is a naked eye star, given the h¹ and the Bright Star Catalogue number 3225. It was considered to be a stable star^[8][9] until 1966.^[10] It was given the variable star designation NS Puppis in 1975.^[11]

h² Puppis is another luminous K-type star with almost the same visual magnitude about a degree to the southeast.