1 Lupi

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1 Lupi
Лучевая скорость (Rv)  км/c
Собственное движение
 • прямое восхождение  mas в год
 • склонение  mas в год

Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end 1 Lupi is a solitary[1] giant star in the southern constellation of Lupus. It has the Bayer designation i Lupi; 1 Lupi is the Flamsteed designation. The apparent visual magnitude is 4.90,[2] which indicates it is faintly visible to the naked eye. Based on parallax measurements, this star is approximately 1,800 light-years from the Sun.[3] It is moving closer to the Earth with a heliocentric radial velocity of −23 km/s.[4]

Houk (1978) assigned the spectral classification of this star as F1III,[5] which suggests it is an F-type (yellow-white) star that has evolved away from the main sequence and expanded into a giant. However, Gray et al. (2001) found a class of F0 Ib-II,[6] matching a supergiant/bright giant star. It has a mass around seven times that of the Sun[7] and has expanded to 41[3] times the Sun's radius. The star is radiating 2,900[8] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 6867.[4] The estimated age of the star is around 47 million years.[7]


  1. Eggleton, P. P. & Tokovinin, A. A. (September 2008), A catalogue of multiplicity among bright stellar systems, Monthly Notices of the Royal Astronomical Society Т. 389 (2): 869–879, DOI 10.1111/j.1365-2966.2008.13596.x 
  2. Mermilliod, J.-C. (1986), Compilation of Eggen's UBV data, transformed to UBV (unpublished), Catalogue of Eggen's UBV Data (SIMBAD) 
  3. а б Brown, A. G. A. et al. Gaia Data Release 2: Summary of the contents and survey properties // Astronomy and Astrophysics : journal. — EDP Sciences, 2018. — August (vol. 616). — P. A1. — doi:10.1051/0004-6361/201833051. — Bibcode2018A&A...616A...1G. — arXiv:1804.09365. Gaia DR2 record for this source at VizieR.
  4. а б Gontcharov, G. A. (November 2006), Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system, Astronomy Letters Т. 32 (11): 759–771, DOI 10.1134/S1063773706110065 
  5. Houk, N. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Dept. of Astronomy, University of Michigan 
  6. Gray, R. O.; Napier, M. G. & Winkler, L. I. (April 2001), The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars, The Astronomical Journal Т. 121 (4): 2148–2158, DOI 10.1086/319956 
  7. а б Tetzlaff, N.; Neuhäuser, R. & Hohle, M. M. (January 2011), A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun, Monthly Notices of the Royal Astronomical Society Т. 410 (1): 190–200, DOI 10.1111/j.1365-2966.2010.17434.x 
  8. McDonald, I.; Zijlstra, A. A. & Boyer, M. L. (2012), Fundamental Parameters and Infrared Excesses of Hipparcos Stars, Monthly Notices of the Royal Astronomical Society Т. 427 (1): 343–57, DOI 10.1111/j.1365-2966.2012.21873.x 

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Шаблон:Stars of Lupus