Kepler-63#Planetary system

{{Short description|Star in the constellation Cygnus}}

{{Sky|19|16|54.2861|+|49|32|53.4508}}

{{Starbox begin

| name = Kepler-63

}}

{{Starbox observe

| epoch = J2000

| constell = Cygnus

| ra = {{RA|19|16|54.2861}}

| dec = {{DEC|49|32|53.451}}

| appmag_v = 12.02

}}

{{Starbox character

| type=Main sequence

| class = G2V

}}

{{Starbox astrometry

| radial_v = {{val|-21.7|0.8}}

| prop_mo_ra = 14.375

| prop_mo_dec = 23.336

| parallax = 5.1157

| p_error = 0.0096

| parallax_footnote = {{cite Gaia DR3|2132628489996257920}}

}}

{{Starbox detail

| source = {{citation|arxiv=1911.08661|year=2020|title=Stellar magnetic activity and the butterfly diagram of Kepler-63|doi=10.1051/0004-6361/201936219|last1=Netto|first1=Y.|last2=Valio|first2=A.|journal=Astronomy & Astrophysics|volume=635|pages=A78|bibcode=2020A&A...635A..78N|s2cid=208176115}}

| mass = 0.984{{±|0.035|0.040}}

| radius =0.901{{±|0.027|0.021}}

| gravity = 4.52{{±|0.02}}

| luminosity = 0.696{{±|0.076|0.059}}

| temperature = 5576{{±|50}}

| metal_fe = 0.05{{±|0.08}}

| rotation = 5.4{{±|0.009}} days

| rotational_velocity = 5.6{{±|0.8}}

| age_gyr = 0.21{{±|0.045}}

}}

{{Starbox catalog

| names = {{odlist|2MASS=J19165428+4932535|TYC=3550-458-1|KOI=63}}

}}

{{Starbox reference

| Simbad = Kepler+63

}}

{{Starbox end}}

Kepler-63 is a G-type main-sequence star about 638 light-years away. The star is much younger than the Sun, at {{val|0.21|u=billion years}}. Kepler-63 is similar to the Sun in its concentration of heavy elements.

The star is exhibiting strong starspot activity, with relatively cold (4700{{±|300}} K) starspots concentrated in two mid-latitude bands similar to the Sun, changing their position in a cycle with a period of 1.27{{±|0.16}} years.{{citation|arxiv=1608.07322|year=2016|title=Stellar magnetic cycles in the solar-like stars Kepler-17 and Kepler-63|last1=Estrela|first1=Raissa|last2=Valio|first2=Adriana}} Due to high magnetic activity associated with its young age, Kepler-63 has a very hot corona heated to 8 million degrees, and produces over ten times the solar amount of x-rays than the Sun.

Multiplicity surveys did not detect any stellar companions to Kepler-63 by 2016.{{citation|arxiv=1612.02392|year=2016|title=Thekeplerfollow-Up Observation Program. I. A Catalog of Companions Tokeplerstars from High-Resolution Imaging|doi=10.3847/1538-3881/153/2/71|last1=Furlan|first1=E.|last2=Ciardi|first2=D. R.|last3=Everett|first3=M. E.|last4=Saylors|first4=M.|last5=Teske|first5=J. K.|last6=Horch|first6=E. P.|last7=Howell|first7=S. B.|last8=Van Belle|first8=G. T.|last9=Hirsch|first9=L. A.|last10=Gautier|first10=T. N.|last11=Adams|first11=E. R.|last12=Barrado|first12=D.|last13=Cartier|first13=K. M. S.|last14=Dressing|first14=C. D.|last15=Dupree|first15=A. K.|last16=Gilliland|first16=R. L.|last17=Lillo-Box|first17=J.|last18=Lucas|first18=P. W.|last19=Wang|first19=J.|journal=The Astronomical Journal|volume=153|issue=2|page=71|s2cid=38339900 |doi-access=free }}