View source for Astronomy:HD 77370

{{Short description|Star in the constellation Carina}}
{{Starbox begin}}
{{Starbox observe
 | epoch       = J2000.0
 | constell    = [[Astronomy:Carina (constellation)|Carina]]
 | ra          = {{RA|08|59|24.18162}}<ref name=GaiaDR2/>
 | dec         = {{DEC|−59|05|01.3569}}<ref name=GaiaDR2/>
 | appmag_v    = 5.17<ref name=Anderson2012/>
}} 
{{Starbox character
 | type        = 
 | class       = F4V<ref name=Gray2006/>
 | b-v         = {{Val|0.417|0.005}}<ref name=Anderson2012/>
 | variable    =
}} 
{{Starbox astrometry
 | radial_v    = {{Val|+13.27|0.63}}<ref name=Anderson2012/>
 | prop_mo_ra  = −175.366<ref name=GaiaDR2/>
 | prop_mo_dec = +281.700<ref name=GaiaDR2/>
 | parallax    = 38.1808
 | p_error     = 0.1737
 | parallax_footnote = <ref name=GaiaDR2/>
 | absmag_v    = 3.06<ref name=Anderson2012/>
}} 
{{Starbox detail
 | mass        = 1.45<ref name=Luck2018/>
 | radius      = {{Val|1.67|0.05|0.11}}<ref name=GaiaDR2/>
 | luminosity  = {{Val|4.834|0.28|0.27}}<ref name=GaiaDR2/>
 | gravity     = 4.18<ref name=Luck2018/>
 | temperature = {{Val|6699|97|fmt=commas}}<ref name=Luck2018/>
 | metal_fe    = 0.93<ref name=Luck2018/>
 | rotational_velocity = {{Val|60.4|3.0}}<ref name=Reiners2006/>
 | age_gyr     = {{Val|1.3|0.3}}<ref name=Anderson2012/>
}} 
{{Starbox catalog
 | names       = {{odlist | B=b<sup>2</sup> Car | BD=−58°1327 | FK5=2570 | GJ=333.1 | HD=77370 | HIP=44143 | HR=3598 | SAO=236475 | GC=12449 | CCDM=J08594-5905 | WDS=J08594-5905A }}<ref name=SIMBAD/>
}}
{{Starbox reference
 | Simbad = HD+77370
}} 
{{Starbox end}}

'''HD 77370''' is a single<ref name=Eggleton2008/> [[Astronomy:Star|star]] in the [[Astronomy:Constellation|constellation]] [[Astronomy:Carina (constellation)|Carina]]. It has the [[Astronomy:Bayer designation|Bayer designation]] '''b<sup>2</sup> Carinae'''; ''HD 77370'' is the identifier from the ''Henry Draper catalogue''. This object has a yellow-white hue and is visible to the naked eye with an [[Astronomy:Apparent visual magnitude|apparent visual magnitude]] of 5.17.<ref name=Anderson2012/> It is located at a distance of 85&nbsp;[[Light year|light year]]s from the [[Astronomy:Sun|Sun]] based on [[Astronomy:Stellar parallax|parallax]],<ref name=GaiaDR2/> and is drifting further away with a [[Astronomy:Radial velocity|radial velocity]] of +13&nbsp;km/s.<ref name=Anderson2012/>

This is an ordinary [[Astronomy:F-type main-sequence star|F-type main-sequence star]] with a [[Astronomy:Stellar classification|stellar classification]] of F4V.<ref name=Gray2006/> It is around 1.3<ref name=Anderson2012/>&nbsp;billion years old and retains a relatively high projected rotational velocity of 60&nbsp;km/s.<ref name=Reiners2006/> The star has 1.45<ref name=Luck2018/> times the mass of the Sun and 1.67<ref name=GaiaDR2/> times the Sun's radius. It is radiating 4.8<ref name=GaiaDR2/> times the luminosity of the Sun from its [[Astronomy:Photosphere|photosphere]] at an [[Astronomy:Effective temperature|effective temperature]] of 6,699&nbsp;K.<ref name=Luck2018/> The star is the most likely source of the [[Astronomy:X-ray astronomy|X-ray emission]] detected at these coordinates.<ref name=Haakonsen2009/>

==References==
{{Reflist|refs=

<ref name=GaiaDR2>{{Cite Gaia DR2|5303126622966501376}}</ref>

<ref name=SIMBAD>{{cite simbad | title=HD 77370 | access-date=2020-01-20 }}</ref>

<ref name=Eggleton2008>{{citation
 | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.
 | title=A catalogue of multiplicity among bright stellar systems
 | journal=[[Organization:Monthly Notices of the Royal Astronomical Society|Monthly Notices of the Royal Astronomical Society]]
 | volume=389 | issue=2 | pages=869–879 | date=September 2008
 | bibcode=2008MNRAS.389..869E | arxiv=0806.2878
 | doi=10.1111/j.1365-2966.2008.13596.x | s2cid=14878976 }}</ref>

<ref name=Gray2006>{{citation
 | title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample
 | display-authors=1 | journal=The Astronomical Journal
 | last1=Gray | first1=R. O. | last2=Corbally | first2=C. J.
 | last3=Garrison | first3=R. F. | last4=McFadden | first4=M. T.
 | last5=Bubar | first5=E. J. | last6=McGahee | first6=C. E.
 | last7=O'Donoghue | first7=A. A. | last8=Knox | first8=E. R.
 | volume=132 | issue=1 | pages=161–170 | year=2006
 | bibcode=2006AJ....132..161G | doi=10.1086/504637
 | arxiv = astro-ph/0603770 | s2cid=119476992 }}</ref>

<ref name=Anderson2012>{{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 | arxiv=1108.4971
 | doi=10.1134/S1063773712050015 | s2cid=119257644 | postscript=. }}</ref>

<ref name=Reiners2006>{{citation | last1=Reiners | first1=Ansgar | title=Rotation- and temperature-dependence of stellar latitudinal differential rotation | journal=Astronomy and Astrophysics | volume=446 | issue=1 |date=January 2006 | pages=267–277 | doi=10.1051/0004-6361:20053911 | bibcode=2006A&A...446..267R |arxiv = astro-ph/0509399 | s2cid=8642707 }}</ref>

<ref name=Luck2018>{{citation
 | title=Abundances in the Local Region. III. Southern F, G, and K Dwarfs
 | last1=Luck | first1=R. Earle | postscript=.
 | journal=The Astronomical Journal
 | volume=155 | issue=3 | id=111 | pages=31 | date=March 2018 
 | doi=10.3847/1538-3881/aaa9b5 | bibcode=2018AJ....155..111L | s2cid=125765376 | doi-access=free }}</ref>

<ref name=Haakonsen2009>{{citation
 | last1=Haakonsen | first1=Christian Bernt | last2=Rutledge | first2=Robert E.
 | title=XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources
 | journal=The Astrophysical Journal Supplement
 | volume=184 | issue=1 | pages=138–151 | date=September 2009
 | doi=10.1088/0067-0049/184/1/138 | postscript=.
 | bibcode=2009ApJS..184..138H | arxiv=0910.3229 | s2cid=119267456 }}</ref>

}}

{{Stars of Carina}}

{{DEFAULTSORT:Hd 77370}}
[[Category:F-type main-sequence stars]]
[[Category:Carina (constellation)]]
[[Category:Bayer objects|Carinae, b2]]
[[Category:Durchmusterung objects]]
[[Category:Gliese and GJ objects]]
[[Category:Henry Draper Catalogue objects|077370]]
[[Category:Hipparcos objects|044143]]
[[Category:Bright Star Catalogue objects|3598]]

{{Sourceattribution|HD 77370}}