Astronomy:NS Puppis

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Short description: Star in the constellation Puppis
This page is about h1 Puppis. For other stars with this Bayer designation, see h Puppis. For H Puppis, see HD 53811.
NS Puppis
Location of NS Puppis (circled)
Observation data
Equinox J2000.0]] (ICRS)
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[1] mas/yr
Dec.: 3.211[1] mas/yr
Parallax (π)2.3831 ± 0.1188[1] mas
Distance1,363+62
−65 ly
(418+19
−20 pc)
Details
Mass8±0.9[5] M☉
Radius213±24[5] R☉
Luminosity9,772[5] L☉
Surface gravity (log g)0.73±0.02[5] cgs
Temperature3,961±125[5] K
Other designations
h1 Pup, CD−39°4084, HD 68553, HIP 40091, HR 3225, SAO 198908
Database references
SIMBADdata

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[6]

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[7][8] until 1966.[9] It was given the variable star designation NS Puppis in 1975.[10]

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

References

  1. ↑ 1.0 1.1 1.2 1.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. ↑ 2.0 2.1 Samus, N. N. 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. doi:10.1086/191373. Bibcode: 1989ApJS...71..245K. 
  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. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Kallinger, T.; Beck, P. G.; Hekker, S.; Huber, D.; Kuschnig, R.; Rockenbauer, M.; Winter, P. M.; Weiss, W. W. et al. (2019-04-01), "Stellar masses from granulation and oscillations of 23 bright red giants observed by BRITE-Constellation" (in en), Astronomy & Astrophysics 624: A35, doi:10.1051/0004-6361/201834514, ISSN 0004-6361, Bibcode: 2019A&A...624A..35K. 
  6. ↑ "/ftp/cats/more/HIP/cdroms/cats". Strasbourg astronomical Data Center. https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats. 
  7. ↑ Irwin, John B. (1961). "Southern Cepheid Photometry". Astrophysical Journal Supplement 6: 253. doi:10.1086/190066. Bibcode: 1961ApJS....6..253I. 
  8. ↑ 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. 
  9. ↑ Cousins, A. W. J. (1966). "Fabry photometry of bright southern stars". Royal Observatory Bulletins, Series E 122: 59. Bibcode: 1966RGOB..122...59C. 
  10. ↑ 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. 
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