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.

References

1. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
2. Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
3. Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373. S2CID 123149047.
4. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
5. Bailer-Jones, C. A. L.; Rybizki, J.; Fouesneau, M.; Demleitner, M.; Andrae, R. (2021-03-01). "Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3". The Astronomical Journal. 161 (3): 147. arXiv:2012.05220. Bibcode:2021AJ....161..147B. doi:10.3847/1538-3881/abd806. ISSN 0004-6256. Data about this star can be seen here.
6. Kallinger, T.; Beck, P. G.; Hekker, S.; Huber, D.; Kuschnig, R.; Rockenbauer, M.; Winter, P. M.; Weiss, W. W.; Handler, G.; Moffat, A. F. J.; Pigulski, A.; Popowicz, A.; Wade, G. A.; Zwintz, K. (2019-04-01), "Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE-Constellation", Astronomy & Astrophysics, 624: A35, arXiv:1902.07531, doi:10.1051/0004-6361/201834514, ISSN 0004-6361.
7. "/ftp/cats/more/HIP/cdroms/cats". Centre de Données astronomiques de Strasbourg. Strasbourg astronomical Data Center. Retrieved 15 October 2022.
8. Irwin, John B. (1961). "Southern Cepheid Photometry". Astrophysical Journal Supplement. 6: 253. Bibcode:1961ApJS....6..253I. doi:10.1086/190066.
9. Iriarte, B. (1965). "BVRI Photoelectric Photometry for 275 Stars located between -25° y -50° (Spanish Title: Fotometría Fotoeléctrica en BVRI para 275 estrellas comprendidas en su) mayoría entre -25° y -50°". Boletín de los Observatorios de Tonantzintla y Tacubaya. 4: 33. Bibcode:1965BOTT....4...33I.
10. Cousins, A. W. J. (1966). "Fabry photometry of bright southern stars". Royal Observatory Bulletins, Series E. 122: 59. Bibcode:1966RGOB..122...59C.
11. Kukarkin, B. V.; Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (1975). "60th Name-List of Variable Stars". Information Bulletin on Variable Stars. 961: 1. Bibcode:1975IBVS..961....1K.