HD 125442

{{Starbox begin

| name = HD 125442

}}

{{Starbox observe

| epoch = J2000

| constell = Lupus

| ra = {{RA|14|20|42.58071}}

| dec = {{DEC|-45|11|13.4190}}

| appmag_v = 4.78

}}

{{Starbox character

| class = F0 IV

| b-v = {{Val|0.310|0.003}}

}}

{{Starbox astrometry

| radial_v = {{Val|+0.0|3.7}}

| prop_mo_ra = +37.33

| prop_mo_dec = −72.81

| parallax = 22.1448

| p_error = 0.3265

| parallax_footnote =

| absmag_v = 1.49

}}

{{Starbox detail

| source =

| mass = 1.49

| radius =

| luminosity = 19.24

| gravity = {{Val|3.95|0.14}}

| temperature = {{Val|7344|250|fmt=commas}}

| metal_fe =

| rotational_velocity = {{Val|148|10}}

| age_myr = 614

}}

{{Starbox catalog

| names={{odlist | CD=-44° 9236 | HD=125442 | HIP=70104 | HR=5364 | SAO=224843 }}

}}

{{Starbox reference

| Simbad = HD+125442

}}

HD 125442 is a single star in the southern constellation of Lupus. Its apparent visual magnitude is 4.78, which can be seen with the naked eye. The distance to HD 125442, as determined from its annual parallax shift of {{Val|22.1|ul=mas}}, is 147 light years.

This is an F-type subgiant star with a stellar classification of F0 IV, having, at the age of 614 million years, used up the hydrogen at its core and begun the process of evolving into a giant star. It has 1.49 times the mass of the Sun and is radiating 19 times the Sun's luminosity from its photosphere at an effective temperature of 7,344 K. The star displays a high rate of spin with a projected rotational velocity of 148 km/s.

References

{{reflist|refs=

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| title=Validation of the new Hipparcos reduction

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| doi=10.1051/0004-6361:20078357 | arxiv=0708.1752 | s2cid=18759600 }}

{{citation

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| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015

| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}

{{citation

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| 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=Ammler-von Eiff | first1=Matthias | last2=Reiners | first2=Ansgar

| title=New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?

| journal=Astronomy & Astrophysics | arxiv=1204.2459

| volume=542 | page=A116 | date=June 2012 | postscript=.

| doi=10.1051/0004-6361/201118724 | bibcode=2012A&A...542A.116A | s2cid=53666672 }}

{{citation

| last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C.