| absmag_v=3.42[3]
}}{{Starbox detail
| mass={{nowrap|1.079 ± 0.073}}[12]
| radius={{nowrap|1.385 ± 0.031}}[12]
| luminosity={{nowrap|3.47 ± 0.18}}[12]
| temperature=6,598[15]
| metal_fe=–0.29[15]
| rotation=
| rotational_velocity=10[17]
| gravity=4.08[15]
| age_gyr=2.4[3]
}}{{Starbox catalog
| names=BD−00 1462, HD 49933, HIP 32851, HR 2530, SAO 133760.[20]
}}{{Starbox reference
| Simbad=HR+2530
}}{{Starbox end}}HD 49933 (HR 2530) is a Sun-like[12] star in the equatorial constellation of Monoceros, the unicorn. The HD designation indicates the identifier of the star found in the Henry Draper catalogue. At an apparent magnitude of 5.8,[3] this star can just be seen with the naked eye under suitably dark conditions. Based upon parallax measurements from the Hipparcos mission,[23] the distance to HD 49933 is about {{Convert|97|ly|pc|abbr=off|lk=on}} with a 1% margin of error. It has an 11.3 magnitude common proper motion companion at an angular separation of 5.9 arcseconds, which may make this a binary star system if the pair are gravitationally bound.[24]This is an F-type main sequence star with a stellar classification of F2 V,[4] where the luminosity class V indicates that it is generating energy through the nuclear fusion of hydrogen at its core. It is slightly larger than the Sun, with 108% of the Sun's mass and 139% of the Sun's radius. HD 49933 emits 3.47 times as much energy as the Sun from its outer atmosphere at a higher effective temperature of about 6,598 K,[12] giving it the yellow-white hue of an F-type star.[27] It is estimated to be 2.4 billion years old.[3]
The surface magnetic activity on this star is similar to what is observed on the Sun. Magnetic features on the surface have been detected using asteroseismology that appear to be starspots (the stellar equivalent to sunspots on the Sun).[29]
References
1. ^1 {{cite journal | author=Perryman, M. A. C. |display-authors=etal | title=The Hipparcos Catalogue | journal=Astronomy and Astrophysics | volume=323 | pages=L49–L52 | date=1997 | bibcode=1997A&A...323L..49P }}
2. ^1 {{cite book | last=Wilson | first=Ralph Elmer | date=1953 | title=General catalogue of stellar radial velocities | publisher=Carnegie Institution of Washington | bibcode=1953GCRV..C......0W }}
3. ^1 2 3 {{cite journal | title=Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters | author=Cenarro, A. J. |display-authors=etal | journal=Monthly Notices of the Royal Astronomical Society | volume=374 | issue=2 | pages=664–690 |date=January 2007 | doi=10.1111/j.1365-2966.2006.11196.x | bibcode=2007MNRAS.374..664C |arxiv = astro-ph/0611618 }}
4. ^1 {{cite journal |author1=Bernacca, P. L. |author2=Perinotto, M. | title=A catalogue of stellar rotational velocities | journal=Contributi Osservatorio Astronomico di Padova in Asiago | volume=239 | issue=1 | date=1970 | bibcode=1970CoAsi.239....1B }}
5. ^1 2 {{cite journal | author=Johnson, H. L. |display-authors=etal | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | date=1966 | bibcode=1966CoLPL...4...99J }}
6. ^1 2 {{cite journal | title=Study of the F-type stars. I. MK spectral types | last=Malaroda | first=S. | journal=Astronomical Journal | volume=80 | pages=637–641 |date=August 1975 | doi=10.1086/111786 | bibcode=1975AJ.....80..637M }}
7. ^1 2 3 4 5 {{cite journal |author1=Holmberg, J. |author2=Nordström, B. |author3=Andersen, J. | title=The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics | journal=Astronomy and Astrophysics Supplement Series | volume=501 | issue=3 |date=July 2009 | pages=941–947 | doi=10.1051/0004-6361/200811191 | bibcode=2009A&A...501..941H|arxiv = 0811.3982 }} Note: see VizieR catalogue V/130.
8. ^1 2 3 4 5 {{cite journal | last=Bruntt | first=H. | title=Accurate fundamental parameters of CoRoT asteroseismic targets. The solar-like stars HD 49933, HD 175726, HD 181420, and HD 181906 | journal=Astronomy and Astrophysics | volume=506 | issue=1 | pages=235–244 |date=October 2009 | doi=10.1051/0004-6361/200911925 | bibcode=2009A&A...506..235B |arxiv = 0907.1198 }}
9. ^1 {{cite web | title=HR 2530 -- Star in double system | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HR+2530 | accessdate=2010-08-27 }}
10. ^1 {{cite news | author=National Center for Atmospheric Research | title=Distant star's sound waves reveal cycle similar to the Sun's | date=August 26, 2010 | publisher=PhysOrg.com | url=http://www.physorg.com/news202032832.html | accessdate=2010-08-27 }}
11. ^1 {{citation | title=The Colour of Stars | date=December 21, 2004 | work=Australia Telescope, Outreach and Education | publisher=Commonwealth Scientific and Industrial Research Organisation | url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | accessdate=2012-01-16 }}
12. ^1 {{cite journal | 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 }}