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- References
{{about-distinguish2|i Lupi (1 Lupi)|ι (iota) Lupi}}{{Starbox begin
| name = 1 Lupi
}}{{Starbox observe
| epoch = J2000.0
| constell = Lupus
| ra = {{RA|15|14|37.32104}}
| dec = {{DEC|-31|31|08.8434}}
| appmag_v = 4.90[3]
}}{{Starbox character
| class = F1 III[4] or F0 Ib-II[5]
| b-v = 0.37[6]
| u-b = +0.26[3]
| variable =
}}{{Starbox astrometry
| radial_v = −22.80[8]
| prop_mo_ra = −9.873
| prop_mo_dec = –0.892
| parallax = 1.8055
| p_error = 0.1876
| parallax_footnote =
| absmag_v = −3.93[12]
}}{{Starbox detail
| mass = {{Val|6.9|0.1}}[13]
| radius = {{Val|41.3|2.2|1.7}}
| luminosity = 2,900[15]
| gravity =
| temperature = 6,867[8]
| metal_fe =
| rotational_velocity = {{Val|3.9|0.2}}[6]
| age_myr = {{Val|47.1|3.8}}[13]
}}{{Starbox catalog
| names = {{odlist | B=i Lup | F=1 Lup | CD=−31°11813 | HD=135153 | HIP=74604 | HR=5660 | SAO=206445 }}[19]
}}{{Starbox reference
| Simbad = 1+Lup
}}{{Starbox end}}1 Lupi is a solitary[20] 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,[3] 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.[ It is moving closer to the Earth with a heliocentric radial velocity of −23 km/s.[8]]Houk (1978) assigned the spectral classification of this star as F1III,[4] 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,[5] matching a supergiant/bright giant star. It has a mass around seven times that of the Sun[13] and has expanded to 41[ times the Sun's radius. The star is radiating 2,900[15] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 6,867 K.[8] The estimated age of the star is around 47 million years.[13]] References 1. ^1 2 {{citation | display-authors=1 | last1=Gray | first1=R. O. | last2=Napier | first2=M. G. | last3=Winkler | first3=L. I. | title=The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars | journal=The Astronomical Journal | volume=121 | issue=4 | pages=2148–2158 | date=April 2001 | doi=10.1086/319956 | bibcode=2001AJ....121.2148G | postscript=. }}
2. ^1 {{citation | title=i Lup -- Star | work=SIMBAD Astronomical Database | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=1+Lupi | accessdate=2016-03-07 | postscript=. }}
3. ^1 2 {{citation | last1=Houk | first1=N. | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=2 | date=1978 | publisher=Dept. of Astronomy, University of Michigan | bibcode=1978mcts.book.....H | postscript=. }}
4. ^1 2 3 4 {{citation | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system | journal=Astronomy Letters | volume=32| issue=11| pages=759–771| date=November 2006 | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G | postscript=. |arxiv = 1606.08053 }}
5. ^1 2 {{citation | last1=Ammler-von Eiff | first1=M. | last2=Reiners | first2=A. | title=New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? | journal=Astronomy & Astrophysics | volume=542 | id=A116 | pages=31 | date=June 2012 | arxiv=1204.2459 | bibcode=2012A&A...542A.116A | doi=10.1051/0004-6361/201118724 | postscript=. }}
6. ^1 2 3 {{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV data | year=1986 | publisher=SIMBAD | bibcode=1986EgUBV........0M | postscript=. }}
7. ^1 2 {{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | postscript=. }}
8. ^1 2 3 4 {{citation | display-authors=1 | last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M. | title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun | journal=Monthly Notices of the Royal Astronomical Society | volume=410 | issue=1 | pages=190–200 |date=January 2011 | doi=10.1111/j.1365-2966.2010.17434.x | bibcode=2011MNRAS.410..190T | arxiv = 1007.4883 | postscript=. }}
9. ^1 {{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }}
10. ^1 {{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
[1][2][3][4][5][6][7][8][9][10]
}}{{Stars of Lupus}} 8 : F-type giants|Lupus (constellation)|Bayer objects|Flamsteed objects|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects |