24 Lyncis

{{Starbox observe

| epoch = J2000

| constell = Lynx

| ra = {{RA|07|43|00.41551}}

| dec = {{DEC|+58|42|37.2950}}

| appmag_v = 4.93

}}

{{Starbox character

| type =

| class = A3 IVn

| b-v = {{Val|+0.104|0.015}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|+9.4|2.3}}

| prop_mo_ra = −37.50

| prop_mo_dec = −52.29

| parallax = 12.22

| p_error = 0.20

| parallax_footnote =

| absmag_v = 0.37

}}

{{Starbox detail

| source =

| mass = 1.89

| radius = 1.7

| luminosity = 60.81

| temperature = {{Val|8786|299|fmt=commas}}

| metal_fe =

| gravity = 3.25

| rotational_velocity = 233

| age_myr = 262

}}

{{Starbox catalog

| names = {{odlist | F=24 Lyn | BD=+59° 1103 | FK5=292 | HD=61497 | HIP=37609 | HR=2946 | SAO=26474 | WDS=J07430+5843A }}

}}

{{Starbox reference

| Simbad = 24+Lyn

}}

24 Lyncis is a single star in the northern constellation of Lynx. It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 4.96. The distance to this star, as determined from its parallax measurements, is around 274 light years. It is moving further away from the Earth with a heliocentric radial velocity of about +9 km/s.

This object has a stellar classification of A3 IVn, matching an A-type star with a subgiant luminosity class. The 'n' suffix indicates "nebulous" absorption lines due to rapid rotation. The star is spinning with a projected rotational velocity of 233 km/s, giving it an equatorial bulge that is 17% larger than the polar radius. Zorec et al. (2012) estimate the star is actually 88% of the way through its main sequence lifetime. It is 262 million years old with 1.89 times the mass of the Sun. 24 Lyncis is radiating 61 times the luminosity of the Sun from its photosphere at an effective temperature of 8,786 K.

There is a magnitude 11.15 visual companion at an angular separation of {{Val|55|ul=arcsecond}} along a position angle of 324°, as of 2010.

References

{{reflist|refs=

{{citation

| title=Validation of the new Hipparcos reduction

| last1=van Leeuwen | first1=F.

| journal=Astronomy and Astrophysics

| volume=474 | issue=2 | pages=653–664 | date=2007

| arxiv=0708.1752 | bibcode=2007A&A...474..653V

| doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}

{{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 | s2cid=119257644 | postscript=. }}

{{citation

| last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A.

| title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets

| journal=The Astrophysical Journal

| volume=804 | issue=2 | pages=146 | year=2015

| bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146

| arxiv=1501.03154 | s2cid=33401607 | postscript=. }}

{{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 | doi-access=free | bibcode=2008MNRAS.389..869E

| arxiv=0806.2878 | s2cid=14878976 | postscript=. }}

{{citation

| last1=Zorec | first1=J. | last2=Royer | first2=F.

| last3=Asplund | first3=Martin | last4=Cassisi | first4=Santi

| last5=Ramirez | first5=Ivan | last6=Melendez | first6=Jorge

| last7=Bensby | first7=Thomas | last8=Feltzing | first8=Sofia

| title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities

| display-authors=1 | journal=Astronomy and Astrophysics

| volume=537 | pages=A120 | year=2012

| arxiv=1201.2052 | doi=10.1051/0004-6361/201117691

| bibcode=2012A&A...537A.120Z | s2cid=55586789 | postscript=. }}

{{citation

| last1=van Belle | first1=Gerard T.

| title=Interferometric observations of rapidly rotating stars

| journal=The Astronomy and Astrophysics Review

| volume=20 | issue=1 | page=51 | date=March 2012

| doi=10.1007/s00159-012-0051-2 | postscript=.

| bibcode=2012A&ARv..20...51V | arxiv=1204.2572 | s2cid=119273474

}}

{{citation

| display-authors=1 | last1=Mason | first1=B. D.

| last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I.

| last4=Douglass | first4=G. G. | last5=Worley | first5=C. E.

| title=The Washington Visual Double Star Catalog

| doi=10.1086/323920 | postscript=. | doi-access=free }}

{{citation

| display-authors=1 | last1=Pasinetti Fracassini | first1=L. E.

| title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)

| edition=Third | journal=Astronomy and Astrophysics

| volume=367 | issue=2 | pages=521–524 | date=February 2001

| doi=10.1051/0004-6361:20000451 | postscript=.

| bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289 | s2cid=425754 }}

{{citation

| last1=Cowley | first1=A. | last2=Cowley | first2=C.

| last3=Jaschek | first3=M. | last4=Jaschek | first4=C.

| title=A study of the bright A stars. I. A catalogue of spectral classifications

| display-authors=1 | journal=Astronomical Journal

| volume=74 | pages=375–406 | date=April 1969

| doi=10.1086/110819 | bibcode=1969AJ.....74..375C }}

}}

Category:A-type subgiants

Category:Lynx (constellation)

Category:Durchmusterung objects