49 Camelopardalis

{{Starbox image

| image = 250px

| caption = A visual band light curve for 49 Camelopardalis, adapted from Adelman and Kaewkornmaung, (2005){{sfn|Adelman|Kaewkornmaung|2005}}>

}}

{{Starbox observe

| epoch = J2000.0

| constell = Camelopardalis

| ra = {{RA|07|46|27.41459}}

| dec = {{DEC|+62|49|49.8895}}

| appmag_v = {{nowrap|6.50{{sfn|Anderson|Francis|2012}} (6.43–6.48){{sfn|Samus|Kazarovets|Durlevich|Kireeva|2017}}}}

}}

{{Starbox character

| type =

| class = A7VpSrCrEuSiKsn{{sfn|Abt|Morrell|1995}}

| b-v = {{Val|0.262|0.002}}{{sfn|Anderson|Francis|2012}}

| variable = α² CVn{{sfn|Samus|Kazarovets|Durlevich|Kireeva|2017}}

}}

{{Starbox astrometry

| radial_v = {{Val|6.5|0.5}}{{sfn|Anderson|Francis|2012}}

| prop_mo_ra = −36.63{{sfn|van Leeuwen|2007}}

| prop_mo_dec = −61.36{{sfn|van Leeuwen|2007}}

| parallax = 10.4369

| p_error = 0.0566

| parallax_footnote =

| absmag_v = 1.58{{sfn|Anderson|Francis|2012}}

}}

{{Starbox detail

| source = {{sfn|Sikora|Wade|Power|Neiner|2019a}}

| mass = {{Val|1.92|0.14|0.25}}

| radius = {{Val|2.32|0.33}}

| gravity = {{Val|3.99|0.13}}

| luminosity = {{Val|17.4|3.5|2.9}}

| temperature = {{Val|7740|460|fmt=commas}}

| metal_fe = {{Val|−3.40|0.16}}

| rotational_velocity = {{Val|25.8|1.0}}

| rotation = {{Val|4.28677|0.00003|fmt=commas|u=days}}{{sfn|Sikora|Wade|Power|Neiner|2019b}}

| age_myr = {{Val|891|489|316}}

}}

{{Starbox catalog

| names = {{odlist | V=BC Cam | F=49 Cam | BD=+63°733 | HD=62140 | HIP=37934 | HR=2977 | SAO=14322 | GC=10422 }}

}}

{{Starbox reference

| Simbad = 49+Cam

}}

49 Camelopardalis is a variable star in the northern circumpolar constellation of Camelopardalis, located 313 light years from the Sun based on parallax measurements. It has the variable star designation BC Camelopardalis; 49 Camelopardalis is the Flamsteed designation. This star is a challenge to view with the naked eye, having a baseline apparent visual magnitude of 6.50.{{sfn|Anderson|Francis|2012}} It is moving away from the Earth with a heliocentric radial velocity of +6.5 km/s.{{sfn|Anderson|Francis|2012}}

This is a magnetic chemically peculiar star{{sfn|Sikora|Wade|Power|Neiner|2019a}} with a stellar classification of A7VpSrCrEuSiKsn,{{sfn|Abt|Morrell|1995}} indicating it is an A-type main-sequence star with overabundances of various elements including strontium and europium, as well as broad, "nebulous" lines. The magnetic field of 49 Camelopardalis shows a relatively complex structure, in combination with distinct abundance patterns across the surface.{{sfn|Silvester|Kochukhov|Rusomarov|Wade|2017}}

Walter K. Bonsack et al. discovered that 49 Camelopardalis is a variable star, in 1974. It is classified as an Alpha² Canum Venaticorum type variable and its brightness varies from visual magnitude +6.43 down to +6.48 with a rotationally-modulated period of 4.29 days.{{sfn|Samus|Kazarovets|Durlevich|Kireeva|2017}}

49 Camelopardalis has 1.9 times the mass of the Sun and 2.3 times the Sun's radius. It is around 891 million years old{{sfn|Sikora|Wade|Power|Neiner|2019a}} and is spinning with a period of 4.29 days.{{sfn|Sikora|Wade|Power|Neiner|2019b}} The star is radiating 17 times the luminosity of the Sun from its photosphere at an effective temperature of 7,740 K.{{sfn|Sikora|Wade|Power|Neiner|2019a}}

References

{{reflist|refs=

{{cite journal |last1=Bonsack |first1=W. K. |last2=Pilachowski |first2=C. A. |last3=Wolff |first3=S. C. |title=The variations of the magnetic Ap star 49 Camelopardalis |journal=Astrophysical Journal |date=January 1974 |volume=187 |pages=265–270 |doi=10.1086/152623 |bibcode=1974ApJ...187..265B |url=https://articles.adsabs.harvard.edu/pdf/1974ApJ...187..265B |access-date=29 December 2024}}

}}

=Sources=

{{cite journal

| last1=Abt | first1=Helmut A. | last2=Morrell | first2=Nidia I.

| title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars

| journal=Astrophysical Journal Supplement Series

| volume=99 | pages=135 | year=1995

| bibcode=1995ApJS...99..135A | doi=10.1086/192182 | doi-access=free }}

{{cite journal |last1=Adelman |first1=S. J. |last2=Kaewkornmaung |first2=P. |title=uubyFCAPT photometry of the mCP stars HD 32633, θ Aur, 49 Cam, and 3 Hya |journal=Astronomy & Astrophysics|date=June 2005 |volume=435 |issue=3 |pages=1099–1104 |doi=10.1051/0004-6361:20042628 |bibcode=2005A&A...435.1099A |doi-access=free}}
{{cite journal

| title=XHIP: An extended hipparcos compilation

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331–346|date=25 May 2012

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015 | s2cid=119257644}}