Beta Camelopardalis

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{{Short description|Yellow-hued star in the constellation Camelopardalis}}

{{Starbox begin

| name=β Camelopardalis

}}

{{Starbox image

| image=

{{Location mark

|image=Camelopardalis constellation map.svg

|float=center

|alt=

|label=

|position=right

|width=240

|mark=Red circle.svg

|mark_width=12

|mark_link=β Camelopardalis

|x=580|y=900

}}

|caption=Location of β Cam (circled)

}}

{{Starbox observe

| epoch=J2000 |

| ra={{RA|05|03|25.08963}}{{cite journal|bibcode=2007A&A...474..653V|title=Validation of the new Hipparcos reduction|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653–664|last1=Van Leeuwen|first1=F.|year=2007|doi=10.1051/0004-6361:20078357|arxiv = 0708.1752 |s2cid=18759600}}

| dec= {{DEC|+60|26|32.0895}}

| appmag_v=4.02{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|last1=Ducati|first1=J. R.|year=2002}}

| constell=Camelopardalis

}}

{{Starbox character

| class=G1Ib–IIa{{cite journal|bibcode=2015MNRAS.446.3447L|arxiv=1411.2722|title=Carbon abundance and the N/C ratio in atmospheres of A-, F- and G-type supergiants and bright giants|journal=Monthly Notices of the Royal Astronomical Society|volume=446|issue=4|pages=3447|last1=Lyubimkov|first1=Leonid S.|last2=Lambert|first2=David L.|last3=Korotin|first3=Sergey A.|last4=Rachkovskaya|first4=Tamara M.|last5=Poklad|first5=Dmitry B.|year=2015|doi=10.1093/mnras/stu2299|doi-access=free }}

| r-i = +0.49

| v-r =

| b-v = +0.93

| u-b = +0.62

| variable=

}}

{{Starbox astrometry

| radial_v=−1.90{{cite journal|bibcode= 2006AstL...32..759G|title= Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|journal= Astronomy Letters|volume= 32|issue= 11|pages= 759–771|last1= Gontcharov|first1= G. A.|year= 2006|doi= 10.1134/S1063773706110065|arxiv = 1606.08053 |s2cid= 119231169}}

| prop_mo_ra=−6.50

| prop_mo_dec=−14.15

| parallax=3.74

| p_error=0.21

| parallax_footnote=

| absmag_v=−3.1{{cite journal|bibcode=2012AJ....143...92G|title=The Third Signature of Granulation in Bright-giant and Supergiant Stars|journal=The Astronomical Journal|volume=143|issue=4|pages=92|last1=Gray|first1=David F.|last2=Pugh|first2=Teznie|year=2012|doi=10.1088/0004-6256/143/4/92|doi-access=free}}

}}

{{Starbox detail

| mass=6.5

| radius={{Val|58|13}}

| luminosity=1,592{{cite journal|bibcode= 2012MNRAS.427..343M|title= Fundamental parameters and infrared excesses of Hipparcos stars|journal= Monthly Notices of the Royal Astronomical Society|volume= 427|pages= 343–357|last1= McDonald|first1= I.|last2= Zijlstra|first2= A. A.|last3= Boyer|first3= M. L.|year= 2012|issue= 1|doi= 10.1111/j.1365-2966.2012.21873.x|doi-access= free|arxiv = 1208.2037 |s2cid= 118665352}}

| temperature=5,300

| metal_fe=−0.06{{cite journal|bibcode=2012MNRAS.423.3268K|title=Accurate luminosities from the oxygen λ7771-4 Å triplet and the fundamental parameters of F-G supergiants|journal=Monthly Notices of the Royal Astronomical Society|volume=423|issue=4|pages=3268|last1=Kovtyukh|first1=V. V.|last2=Gorlova|first2=N. I.|last3=Belik|first3=S. I.|year=2012|doi=10.1111/j.1365-2966.2012.21117.x|doi-access=free |arxiv = 1204.4115 |s2cid=118683158}}

| gravity=1.79

| rotational_velocity=11.7{{cite journal|bibcode=2015ApJ...801...54R|title=On the Nature of Rapidly Rotating Single Evolved Stars|journal=The Astrophysical Journal|volume=801|pages=54|last1=Rodrigues Da Silva|first1=R.|last2=Canto Martins|first2=B. L.|last3=De Medeiros|first3=J. R.|year=2015|issue=1 |doi=10.1088/0004-637X/801/1/54|arxiv = 1503.03447 |s2cid=119271718}}

| age_myr=53

}}

{{Starbox catalog

| names = {{odlist | B=β Cam | F=10 Camelopardalis | BD=+60°856 | FK5=182 | HD=31910 | HIP=23522 | HR=1603 | SAO=13351 | WDS=J05034+6027 | ADS=3615 A }}

}}

{{Starbox reference

| Simbad=HD+31910

| ARICNS =

}}{{starbox sources|HIP|CCDM|HR}}

{{Starbox end}}

Beta Camelopardalis, Latinised from β Camelopardalis, is the brightest star in the northern constellation of Camelopardalis. It is bright enough to be faintly visible to the naked eye, having an apparent visual magnitude of 4.02. Based upon an annual parallax shift of 3.74 mas as seen from Earth, it is located roughly 870 light-years from the Sun. It is moving closer with a radial velocity of −1.90 km/s and is most likely a single star.

This is a yellow-hued G-type supergiant/bright giant with a stellar classification of G1 Ib–IIa. It is an estimated 60 million years old and is spinning with a projected rotational velocity of 11.7 km/s. This is an unusually high rate of rotation for an evolved star of this type. One possible explanation is that it may have engulfed a nearby giant planet, such as a hot Jupiter.{{cite journal | title=On the Nature of Rapidly Rotating Single Evolved Stars | last1=Rodrigues da Silva | first1=R. | last2=Canto Martins | first2=B. L. | last3=De Medeiros | first3=J. R. | journal=The Astrophysical Journal | volume=801 | issue=1 | id=54 | pages=6 | date=March 2015 | doi=10.1088/0004-637X/801/1/54 | bibcode=2015ApJ...801...54R | arxiv=1503.03447 | s2cid=119271718 }}

Beta Camelopardalis has 6.5 times the mass of the Sun and has expanded to around 58 the Sun's radius. The star is radiating 1,592 times the Sun's luminosity from its enlarged photosphere at an effective temperature of {{val|5300|fmt=commas|ul=K}}. It is a source of X-ray emission.

β Cam has two visual companions: a 7th-magnitude A5-class star at an angular separation of 84 arcseconds; and a 12th-magnitude star at 15 arcseconds.{{cite journal|bibcode=2001AJ....122.3466M|title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog|journal=The Astronomical Journal|volume=122|issue=6|pages=3466|last1=Mason|first1=Brian D.|last2=Wycoff|first2=Gary L.|last3=Hartkopf|first3=William I.|last4=Douglass|first4=Geoffrey G.|last5=Worley|first5=Charles E.|year=2001|doi=10.1086/323920|doi-access=free}}