- References
| name = HR 3803
}}{{Starbox observe
| epoch = J2000
| constell = Vela
| ra = {{RA|09|31|13.31891}}
| dec = {{DEC|–57|02|03.7578}}
| appmag_v = 3.16[3]
}}{{Starbox character
| class = K5 III[4]
| b-v = +1.55[5]
| u-b = +1.88[5]
| variable =
}}{{Starbox astrometry
| radial_v = –13.9[3]
| prop_mo_ra = –32.54
| prop_mo_dec = +5.87
| parallax = 13.65
| p_error = 0.10
| parallax_footnote =
| absmag_v =
}}{{Starbox detail
| mass = 2.0[11]
| radius = 29[12]
| luminosity =
| temperature = 3,860[11]
| gravity =
| metal_fe =
| rotational_velocity =
}}{{Starbox catalog
| names = N Velorum, N Vel, CP–56 2270, HD 82668, FK5 361, HIP 46701, HR 3803, SAO 237067.
}}{{Starbox reference
| Simbad = HR+3803
}}{{Starbox end}}HR 3803 or N Velorum (N Vel) is a 3rd-magnitude star on the border between the southern constellations Carina and Vela. Based upon parallax measurements, it is approximately {{Convert|239|ly|pc|abbr=off|lk=on}} from Earth. It is an orange-hued K-type giant star and has twice the mass of the Sun.[11] The measured angular diameter of this star, after correction for limb darkening, is {{nowrap|7.13 ± 0.08 mas}}.[15] At the estimated distance of Eta Draconis, this yields a physical size of about 29 times the radius of the Sun.[12]
In 1752, French astronomer Nicolas Louis de Lacaille divided the former constellation Argo Navis into three separate constellations, and then referenced its stars by extending Bayer's system of star nomenclature;[1] this star was given the designation N Velorum. In 1871 Benjamin Apthorp Gould discovered this star to be variable, but this occurred prior to the standardization of variable star nomenclature by German astronomer Friedrich Wilhelm Argelander during the nineteenth century, so it does not fall into the standard range of variable star designations.[19]
References
1. ^{{cite web |url=http://homepage.mac.com/andjames/Page206.htm |title=Archived copy |accessdate=2012-04-13 |deadurl=yes |archiveurl=https://web.archive.org/web/20100121133557/http://homepage.mac.com/andjames/Page206.htm |archivedate=2010-01-21 |df= }}
2. ^1 2 3 {{citation | last1=Gondoin | first1=P. | title=Evolution of X-ray activity and rotation on G-K giants | journal=Astronomy and Astrophysics | volume=352 | pages=217–227 |date=December 1999 | bibcode=1999A&A...352..217G }}
3. ^1 {{cite journal | last1=Morgan | first1=W. W. | last2=Keenan | first2=P. C. | title=Spectral Classification | journal=Annual Review of Astronomy and Astrophysics | volume=11 | issue=1 | page=29 | date=1973 | doi=10.1146/annurev.aa.11.090173.000333 | bibcode=1973ARA&A..11...29M }}
4. ^1 2 {{citation | display-authors=1 | title=Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions | journal=Veröff. Astron. Rechen-Inst. Heidelb | volume=35 | last1=Wielen | first1=R. | last2=Schwan | first2=H. | last3=Dettbarn | first3=C. | last4=Lenhardt | first4=H. | last5=Jahreiß | first5=H. | last6=Jährling | first6=R. | publisher=Astronomisches Rechen-Institut Heidelberg | issue=35 | pages=1 | date=1999 | bibcode=1999VeARI..35....1W }}
5. ^1 2 {{cite journal | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | pages=99 | date=1966 | bibcode=1966CoLPL...4...99J }}
6. ^1 {{citation | last1=Hoffleit | first1=Dorrit | title=History of Variable Star Nomenclature | journal=The Journal of the American Association of Variable Star Observers | volume=16 | issue=2 | pages=65–70 |date=December 1987 | bibcode=1987JAVSO..16...65H | url=http://www.aavso.org/files/webpublications/ejaavso/v16n2/65.pdf | accessdate=2012-02-02 }}
7. ^1 {{citation | last1=Richichi | first1=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | issue=2 | pages=773–777 |date=February 2005 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R }}
8. ^1 2 {{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3 | publisher=Birkhäuser | date=2006 | isbn=3540296921 | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R*) is given by::
[2][3][4][5][6][7][8]2. ^1 2 3 {{citation | last1=Gondoin | first1=P. | title=Evolution of X-ray activity and rotation on G-K giants | journal=Astronomy and Astrophysics | volume=352 | pages=217–227 |date=December 1999 | bibcode=1999A&A...352..217G }}
3. ^1 {{cite journal | last1=Morgan | first1=W. W. | last2=Keenan | first2=P. C. | title=Spectral Classification | journal=Annual Review of Astronomy and Astrophysics | volume=11 | issue=1 | page=29 | date=1973 | doi=10.1146/annurev.aa.11.090173.000333 | bibcode=1973ARA&A..11...29M }}
4. ^1 2 {{citation | display-authors=1 | title=Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions | journal=Veröff. Astron. Rechen-Inst. Heidelb | volume=35 | last1=Wielen | first1=R. | last2=Schwan | first2=H. | last3=Dettbarn | first3=C. | last4=Lenhardt | first4=H. | last5=Jahreiß | first5=H. | last6=Jährling | first6=R. | publisher=Astronomisches Rechen-Institut Heidelberg | issue=35 | pages=1 | date=1999 | bibcode=1999VeARI..35....1W }}
5. ^1 2 {{cite journal | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | pages=99 | date=1966 | bibcode=1966CoLPL...4...99J }}
6. ^1 {{citation | last1=Hoffleit | first1=Dorrit | title=History of Variable Star Nomenclature | journal=The Journal of the American Association of Variable Star Observers | volume=16 | issue=2 | pages=65–70 |date=December 1987 | bibcode=1987JAVSO..16...65H | url=http://www.aavso.org/files/webpublications/ejaavso/v16n2/65.pdf | accessdate=2012-02-02 }}
7. ^1 {{citation | last1=Richichi | first1=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | issue=2 | pages=773–777 |date=February 2005 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R }}
8. ^1 2 {{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3 | publisher=Birkhäuser | date=2006 | isbn=3540296921 | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 }}. The radius (R*) is given by::
}}{{Stars of Vela}}{{DEFAULTSORT:Hd 82668}}{{Giant-star-stub}}
7 : Bayer objects|Henry Draper Catalogue objects|K-type giants|Vela (constellation)|HR objects|Hipparcos objects|Durchmusterung objects
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