21 Camelopardalis

{{Starbox begin

| name = 21 Camelopardalis

}}

{{Starbox observe

| epoch = J2000.0

| constell = Camelopardalis

| ra = {{RA|05|40|28.99683}}

| dec = {{DEC|+61|56|56.0999}}

| appmag_v = 6.867

}}

{{Starbox character

| class = A5

| b-v = +0.22

| u-b =

| variable=

}}

{{Starbox astrometry

| radial_v = −15.5

| prop_mo_ra = −6.911

| prop_mo_dec = +1.818

| parallax = 5.0131

| p_error = 0.0864

| parallax_footnote =

| absmag_v = 0.90

}}

{{Starbox detail

| mass =

| radius = 3.121

| luminosity = 35.66

| temperature = 7,619

| metallicity_fe =

| gravity =

| rotational_velocity =

| age =

}}

{{Starbox catalog

| names = {{odlist | F=21 Cam | BD=+61°806 | FK5=1150 | HD=37136 | HIP=26700 | SAO=13564 }}

}}

{{Starbox reference

| Simbad = 21+Cam

}}

21 Camelopardalis is a star in the northern circumpolar constellation of Camelopardalis, located around 650 light years away from the Sun. It is a challenge to view with the naked eye even under excellent viewing conditions, having an apparent visual magnitude of 6.9. This is one of the fainter stars with a Flamsteed designation, one of only 220 below the magnitude cutoff for the Bright Star Catalogue. It is moving closer to the Earth with a heliocentric radial velocity of −15.5 km/s.

The spectral type for 21 Camelopardalis is given only as A5 with no published luminosity class. It is treated as a normal main sequence star, although it is calculated to be larger and more luminous than a typical A5 main sequence star. Based upon changes to its proper motion over time, this is a probable astrometric binary.

References

{{reflist|refs=

{{cite journal|bibcode= 1996A&AS..115..401J|title= UvbyHbeta_ photometry of main sequence A type stars|journal= Astronomy and Astrophysics Supplement|volume= 115|pages= 401|last1= Jordi|first1= C.|author1-link=Carme Jordi |last2= Figueras|first2= F.|last3= Torra|first3= J.|last4= Asiain|first4= R.|year= 1996}}

{{cite journal|bibcode=1981A&AS...46..193H|title=Empirical bolometric corrections for the main-sequence|journal=Astronomy and Astrophysics Supplement Series|volume=46|pages=193|last1=Habets|first1=G. M. H. J.|last2=Heintze|first2=J. R. W.|year=1981}}

{{cite journal|bibcode=1985PASP...97..807E|title=Hyades and Sirius supercluster members brighter than magnitude(V) 7.1. I - the first six hours of right ascension|journal=Astronomical Society of the Pacific|volume=97|pages=807|last1=Eggen|first1=O. J.|year=1985|doi=10.1086/131607|doi-access=free}}

{{cite journal|bibcode=1953GCRV..C......0W|title=General catalogue of stellar radial velocities|journal=Washington|last1=Wilson|first1=Ralph Elmer|year=1953}}

{{cite journal|bibcode= 2006A&A...450..735M|title= Effective temperature scale and bolometric corrections from 2MASS photometry|journal= Astronomy and Astrophysics|volume= 450|issue= 2|pages= 735|last1= Masana|first1= E.|last2= Jordi|first2= C.|last3= Ribas|first3= I.|year= 2006|doi= 10.1051/0004-6361:20054021|arxiv = astro-ph/0601049 |s2cid= 15278668}}

{{cite journal|bibcode= 2015A&A...580A..23P|title= A new catalogue of Strömgren-Crawford uvbyβ photometry|journal= Astronomy & Astrophysics|volume= 580|pages= A23|last1= Paunzen|first1= E.|year= 2015|doi= 10.1051/0004-6361/201526413|arxiv = 1506.04568 |s2cid= 73623700}}

{{cite journal|bibcode=2010A&A...515A.111S|title=The PASTEL catalogue of stellar parameters|journal=Astronomy and Astrophysics|volume=515|pages=A111|last1=Soubiran|first1=C.|last2=Le Campion|first2=J.-F.|last3=Cayrel De Strobel|first3=G.|last4=Caillo|first4=A.|year=2010|doi=10.1051/0004-6361/201014247|arxiv = 1004.1069 |s2cid=118362423}}

{{cite journal|bibcode=1990BICDS..38...13B|title=Flamsteed stars not contained in the Yale "Catalogue of Bright Stars"|journal=Bulletin d'Information du Centre de Données Stellaires|volume=38|pages=13|last1=Bidelman|first1=W. P.|year=1990}}

{{cite journal | 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 }}

{{citation | last1=Frankowski | first1=A. | last2=Jancart | first2=S. | last3=Jorissen | first3=A. | title=Proper-motion binaries in the Hipparcos catalogue. Comparison with radial velocity data | journal=Astronomy and Astrophysics | volume=464 | issue=1 | pages=377–392 | date=March 2007 | doi=10.1051/0004-6361:20065526 | bibcode=2007A&A...464..377F | arxiv=astro-ph/0612449 | s2cid=14010423 }}

}}

Category:A-type main-sequence stars

Category:Camelopardalis

Category:Durchmusterung objects

Camelopardalis, 21

037136

026700