22 Camelopardalis

{{Starbox observe

| epoch = J2000.0

| constell = Camelopardalis

| ra = {{RA|05|39|05.40416}}

| dec = {{DEC|+56|21|36.1540}}

| appmag_v = 7.03

}}

{{Starbox character

| type =

| class = F5 V

| b-v = {{Val|0.411|0.004}}

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|+10.3|1.8}}

| prop_mo_ra = +10.514

| prop_mo_dec = −131.789

| parallax = 15.4048

| p_error = 0.1014

| parallax_footnote =

| absmag_v = 3.14

}}

{{Starbox orbit

| reference =

| period_unitless = {{Val|81.463|0.005|u=days}}

| eccentricity = {{Val|0.136|0.024}}

| periastron = {{Val|51969.9|2.2|u=MJD}}

| periarg = {{Val|0|10}}

| k1 = {{Val|9.52|0.24|}}

}}

{{Starbox detail

| source =

| mass = 1.34

| radius = 1.68

| gravity = 4.26

| luminosity = 5.215

| temperature = {{Val|6732|229|fmt=commas}}

| metal_fe = 0.01

| rotational_velocity =

| age_gyr = 1.515

}}

{{Starbox catalog

| names = {{odlist | F=22 Cam | BD=+56°1044 | HD=37070 | HIP=26587 | SAO=25298 | GC=6990 }}

}}

{{Starbox reference

| Simbad = 22+Cam

}}

22 Camelopardalis is a binary star system in the northern circumpolar constellation of Camelopardalis, located 212 light years away from the Sun. It has an apparent visual magnitude of 7.03, which is below the normal limit for visibility with the naked eye. This object is moving further from the Earth with a mean heliocentric radial velocity of +10 km/s. Eggen (1991) listed it as a member of the IC 2391 supercluster. It has also been catalogued as a member of the Hyades group. However, Griffin (2005) suggests it belongs to neither.

This is a single-lined spectroscopic binary system with an orbital period of 81.5 days and a significant eccentricity of 0.14. It has an '{{nowrap|a sin i}}' value of {{Convert|10.57|±|0.27|Gm|AU|lk=on|abbr=on}}, where a is the semimajor axis and i is the orbital inclination to the line of sight from the Earth. This value provides a lower bound on the true semimajor axis of their orbit.

The visible component is an F-type main-sequence star with a stellar classification of F5 V. It is an estimated 1.5 billion years old with 1.3 times the mass of the Sun and 1.7 times the Sun's radius. It is radiating 5.2 times the Sun's luminosity from its photosphere at an effective temperature of 6,732 K.

References

{{reflist|refs=

{{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=Casagrande | first1=L. | last2=Schönrich | first2=R.

| last3=Asplund | first3=M. | last4=Cassisi | first4=S.

| last5=Ramírez | first5=I. | last6=Meléndez | first6=J.

| last7=Bensby | first7=T. | last8=Feltzing | first8=S.

| title=New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey

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

| volume=530 | page=A138 | date=June 2011

| doi=10.1051/0004-6361/201016276 | postscript=.

| bibcode=2011A&A...530A.138C | arxiv=1103.4651 | s2cid=56118016 }}

{{citation

| title=Spectroscopic binary orbits from photoelectric radial velocities. Paper 182: 22 Camelopardalis, HD 156051, HR 6890, & HD 221757

| last1=Griffin | first1=R. F.

| journal=The Observatory | postscript=.

| volume=125 | pages=134–152 | date=June 2005

| bibcode=2005Obs...125..134G }}

{{citation

| title=Spectral Classification of Stars in A Supplement to the Bright Star Catalogue