N Scorpii

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N Scorpii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Scorpius
Right ascension 16h 31m 22.93s [1]
Declination −34° 42′ 15.71″ [1]
Apparent magnitude (V) 4.23[2]
Characteristics
Spectral type B2III-IV
U−B color index −0.76[2]
B−V color index −0.17[2]
Astrometry
Radial velocity (Rv)0.8±1.5[3] km/s
Proper motion (μ) RA: −12.05±0.20[1] mas/yr
Dec.: −18.16±0.13[1] mas/yr
Parallax (π)5.88 ± 0.19[1] mas
Distance550 ± 20 ly
(170 ± 5 pc)
Absolute magnitude (MV)−1.91[4]
Details
Mass7.8±0.1[5] M☉
Radius7[6] R☉
Luminosity6,918[7] L☉
Surface gravity (log g)3.74[8] cgs
Temperature13,814[8] K
Metallicity [Fe/H]+0.01[8] dex
Rotational velocity (v sin i)70±8[9] km/s
Age21.6±3.6[5] Myr
Other designations
N Sco, HR 6143, HD 148703, HIP 80911, SAO 207732, CD−34°11044
Database references
SIMBADdata

N Scorpii (N Sco) is a star in the constellation Scorpius. Its apparent magnitude is 4.23, and was initially given the Bayer designation Alpha Normae by Lacaille but later moved from Norma to Scorpius.[10] N Scorpii is located 550 light years away based on parallax, and is part of the Upper Scorpius-Centaurus Association[11]

Properties[]

N Scorpii has a classification of B2III-IV, which states it is a B-type star with its characteristics between a giant star and subgiant. It has 4.2 times the Sun's mass, and 7 times the Sun's radius. N Scorpii radiates at 6,918 solar luminosities at an effective temperature of 13,814 K. Despite its advanced age of 21 million years, N Scorpii has a projected rotational velocity of 70 km/s.

References[]

  1. ^ a b c d e Van Leeuwen, Floor (2007). "Validation of the new Hipparcos reduction". Astronomy & Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. ^ a b c Ducati, J. R. (1 January 2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". VizieR Online Data Catalog.
  3. ^ Gontcharov, G. A. (1 November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32: 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737.
  4. ^ Anderson, E.; Francis, Ch. (1 May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38: 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737.
  5. ^ a b Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (1 January 2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190–200. doi:10.1111/j.1365-2966.2010.17434.x. ISSN 0035-8711.
  6. ^ Wesselink, A. J.; Paranya, K.; DeVorkin, K. (1 November 1972). "Catalogue of stellar dimensions". Astronomy and Astrophysics Supplement Series. 7: 257. ISSN 0365-0138.
  7. ^ Sartori, M. J.; Lépine, J. R. D.; Dias, W. S. (1 June 2003). "Formation scenarios for the young stellar associations between galactic longitudes l = 280degr - 360degr". Astronomy and Astrophysics. 404: 913–926. doi:10.1051/0004-6361:20030581. ISSN 0004-6361.
  8. ^ a b c Anders, F.; et al. (1 August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
  9. ^ Brown, A. G. A.; Verschueren, W.; Robertson, J. G. (1 March 1997). "High S/N Echelle spectroscopy in young stellar groups. II. Rotational velocities of early-type stars in SCO OB2". Astronomy and Astrophysics. 319: 811–838. ISSN 0004-6361.
  10. ^ "Norma Constellation (the Level): Stars, Story, Facts... | Constellation Guide". www.constellation-guide.com. Retrieved 11 October 2021.
  11. ^ Rizzuto, A. C.; Ireland, M. J.; Robertson, J. G. (1 October 2011). "Multidimensional Bayesian membership analysis of the Sco OB2 moving group". Monthly Notices of the Royal Astronomical Society. 416: 3108–3117. doi:10.1111/j.1365-2966.2011.19256.x. ISSN 0035-8711.
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