NS Puppis

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NS Puppis
Puppis constellation map.svg
Red circle.svg
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 (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 NSPupLightCurve.png
A light curve for NS Puppis, plotted from Hipparcos 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. 1 2 3 4 5 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. 1 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. 1 2 3 4 5 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 , Bibcode:2019A&A...624A..35K, 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.
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