36 Persei

{{Starbox image

| image =

{{Location mark

|image=Perseus constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=36 Persei

|x=515|y=530

}}

| caption = Location of 36 Persei (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Perseus

| ra = {{RA|03|32|26.25886}}

| dec = {{DEC|46|03|24.7029}}

| appmag_v = 5.32

}}

{{Starbox character

| type =

| class = F4III

| b-v = +0.41

| u-b = −0.02

| variable =

}}

{{Starbox astrometry

| radial_v = −47.5

| prop_mo_ra = −52.829

| prop_mo_dec = −74.915

| parallax = 26.9895

| p_error = 0.1053

| parallax_footnote =

| absmag_v = 2.50

}}

{{Starbox detail

| mass = 1.50

| radius = {{Val|2.28|0.13|0.09}}

| temperature = {{val|6546|126|176|fmt=commas}}

| luminosity = {{Val|8.585|0.042}}

| rotational_velocity = 28.0

| gravity = 3.94

| metal_fe = −0.17

| age_gyr = 2.20

}}

{{Starbox catalog

| names = {{odlist | F=36 Per | BD=+45°778 | FK5=2249 | GC=4210 | HD=21770 | HIP=16499 | HR=1069 | SAO=38924 | NSV=1182 }}

}}

{{Starbox reference

| Simbad = 36+Persei

}}

36 Persei is a solitary, variable star located 121 light years away from the Sun in the northern constellation of Perseus. It is visible to the naked eye as a dim, yellow-white hued point of light with a baseline apparent visual magnitude of 5.32. The star is drifting closer to the Sun with a heliocentric radial velocity of −47.5 km/s, and may come as close as {{Convert|11.21|pc|ly|disp=out|abbr=off}} in 661,000 years.

The stellar classification of 36 Persei is F4III, matching an aging giant star that has used up its core hydrogen. This object is used by astronomers as a spectral standard for stars with a similar class. The star is a suspected variable of unknown type, ranging in visual magnitude from 5.29 down to 5.33, and is a source of X-ray emission. The star is 2.2 billion years old with a projected rotational velocity of 28 km/s. It has an estimated 1.5 times the mass of the Sun and has not yet expanded significantly, having 2.3 times the Sun's girth. The star is radiating 8.6 times the luminosity of the Sun from its photosphere at an effective temperature of 6,546

References

{{reflist|refs=

{{cite journal

| last1=Ducati | first1=J. R.

| title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system

| journal=CDS/ADC Collection of Electronic Catalogues

| volume=2237 | year=2002

| bibcode=2002yCat.2237....0D }}

{{cite journal

| title= The Uppsala spectral classification

| last1=Ljunggren | first1=B. | last2=Oja | first2=T.

| journal=Uppsala Astronomical Observatory Annual

| volume=4 | page=10 | year=1961

| issue=10 | bibcode=1961UppAn...4j...1L }}>

{{cite journal

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

| title=XHIP: An extended hipparcos compilation

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

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

| doi=10.1134/S1063773712050015

| s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=16499 Vizier catalog entry]

{{cite journal

| last1=De Medeiros | first1=J. R. | last2=Alves | first2=S.

| last3=Udry | first3=S. | last4=Andersen | first4=J.

| last5=Nordström | first5=B. | last6=Mayor | first6=M.

| title=A catalog of rotational and radial velocities for evolved stars

| journal=Astronomy & Astrophysics

| volume=561 | pages=A126 | year=2014

| bibcode=2014A&A...561A.126D | arxiv=1312.3474

| doi=10.1051/0004-6361/201220762

| s2cid=54046583 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/561/A126/table1&HD=21770 Vizier catalog entry]

{{cite journal

| 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

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

| doi=10.1051/0004-6361/201016276 | s2cid=56118016 }}

{{cite journal

| last1=Haakonsen | first1=Christian Bernt | last2=Rutledge | first2=Robert E.

| title=XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources

| journal=The Astrophysical Journal Supplement

| volume=184 | issue=1 | pages=138–151 | date=September 2009

| doi=10.1088/0067-0049/184/1/138 | bibcode=2009ApJS..184..138H

| arxiv=0910.3229 | s2cid=119267456 }}

{{cite journal