12 Persei

{{Starbox begin

| name = 12 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=12 Persei

|x=780|y=667

}}

|caption=Location of 12 Persei (circled)

}}

{{Starbox observe

| epoch = J2000.0

| constell = Perseus

| ra = {{RA|02|42|14.91569}}

| dec = {{DEC|+40|11|38.1898}}

| appmag_v = 4.94

}}

{{Starbox character

| class = F9 V

| b-v = +0.56

| u-b = +0.08

| variable =

}}

{{Starbox astrometry

| radial_v = 5.20

| prop_mo_ra = −17.20

| prop_mo_dec = −183.30

| parallax = 41.34

| p_error = 0.43

| parallax_footnote =

| absmag_v =

}}

{{Starbox orbit

| reference =

| period_unitless = 330.98 d

| axis =

| axis_unitless = 53.18 mas

| eccentricity = 0.663

| inclination = 127.17

| node =

| periastron =

| periarg =

| periarg_primary =

| k1 =

| k2 =

}}

{{Starbox detail

| component1 = 12 Per A

| mass = {{Val|1.382|0.019}}

| radius = 1.55

| luminosity = 3.02

| gravity = {{Val|4.20|0.10}}

| temperature = {{val|6195|200}}

| metal_fe = ≥0.35

| rotational_velocity = 13

| age_gyr = 1.12

| component2 = 12 Per B

| mass2 = {{val|1.240|0.017}}

| radius2 = 1.31

| luminosity2 = 1.86

| gravity2 = {{Val|4.30|0.10}}

| temperature2 = {{val|6000|200}}

}}

{{Starbox catalog

| names = 12 Per, BD+39° 610, FK5 2187, GJ 105.6 АВ, HD 16739, HIP 12623, HR 788, SAO 55793.

}}

{{Starbox reference

| Simbad = 12+Per

}}

12 Persei (12 Per) is a double-lined spectroscopic binary star system in the northern constellation Perseus. Its combined apparent magnitude is 4.94, which means it can be viewed with the naked eye. Based upon parallax measurements, this system is about 79 light years away from the Sun.

The magnitude difference between the two components is estimated to be 0.51. Based upon this, the primary has a mass around 138% of the Sun, 155% of the Sun's radius, and shines with three times the Sun's luminosity. The smaller secondary component is also larger than the Sun, with 124% of the Sun's mass, 131% of the radius of the Sun, and has 186% of the Sun's luminosity. The stellar classification of the primary is F9 V, which suggests it is an F-type main sequence star. The pair have an estimated age of just over a billion years.

The pair orbit each other with a period of 331 days and an eccentricity of 0.663. The semimajor axis of their orbit is 1.27 AU, which means the inner stability radius for a hypothetical planet orbiting the pair would be at 4.35 AU. This lies outside the habitability zone for this system.

References

{{reflist|refs=

{{citation

| last1=van Leeuwen | first1=F.

| title=Validation of the new Hipparcos reduction

| journal=Astronomy and Astrophysics

| volume=474 | issue=2 | pages=653–664 | date=2007

| arxiv=0708.1752 | bibcode=2007A&A...474..653V

| doi=10.1051/0004-6361:20078357 | s2cid=18759600

}}.

{{citation

| last1=Abt | first1=Helmut A.

| title=MK Classifications of Spectroscopic Binaries

| journal=The Astrophysical Journal Supplement

| volume=180 | pages=117–118 | year=2009

| issue=1

| doi=10.1088/0067-0049/180/1/117 | bibcode=2009ApJS..180..117A

| s2cid=122811461

}}.

{{citation

| last1=Bernacca | first1=P. L. | last2=Perinotto | first2=M.

| title=A catalogue of stellar rotational velocities

| journal=Contributi Osservatorio Astronomico di Padova in Asiago

| volume=239 | issue=1 | year=1970

| page=1 | bibcode=1970CoAsi.239....1B}}.

{{citation

| display-authors=1 | last1=Pourbaix | first1=D.

| last2=Tokovinin | first2=A. A. | last3=Batten | first3=A. H.

| last4=Fekel | first4=F. C. | last5=Hartkopf | first5=W. I.

| last6=Levato | first6=H. | last7=Morrell | first7=N. I.

| last8=Torres | first8=G. | last9=Udry | first9=S.

| title=SB9: The ninth catalogue of spectroscopic binary orbits

| journal=Astronomy and Astrophysics

| volume=424 | pages=727–732 | date=September 2004

| doi=10.1051/0004-6361:20041213 | bibcode=2004A&A...424..727P

|arxiv = astro-ph/0406573 | s2cid=119387088}}.

{{citation

| last1=Leushin | first1=V. V. | last2=Kuznetsov | first2=M. K.

| title=Chemical Composition and Evolutionary Status of Spectral Binary Star 12 Per

| journal=Odessa Astronomical Publications

| volume=21 | page=57 | year=2008

| bibcode=2008OAP....21...57L

}}.

{{citation

| display-authors=1 | last1=Bagnuolo | first1=William G. Jr.

| last2=ten Brummelaar | first2=Theo A. | last3=McAlister | first3=H. A.

| last4=Gies | first4=Douglas R. | last5=Ridgway | first5=Stephen T.

| contribution =The star 12 Persei and separated fringe packet binaries (SFPB)

| title=Advances in Stellar Interferometry

| editor1-last=Monnier | editor1-first=John D.

| editor2-last=Schöller | editor2-first=Markus

| editor3-last=Danchi | editor3-first=William C.

| series=Proceedings of the SPIE

| volume=6268 | id=62682T | date=June 2006

| pages=62682T | doi=10.1117/12.672275 | bibcode=2006SPIE.6268E..2TB

| s2cid=124256072}}.

{{citation

| display-authors=1 | last1=Jaime | first1=Luisa G.

| last2=Aguilar | first2=Luis | last3=Pichardo | first3=Barbara

| title=Habitable zones with stable orbits for planets around binary systems

| journal=Monthly Notices of the Royal Astronomical Society

| volume=443 | issue=1 | pages=260–274 | date=September 2014

| doi=10.1093/mnras/stu1052 | doi-access=free | bibcode=2014MNRAS.443..260J

| arxiv=1401.1006}}.

{{citation

| last1=Mermilliod | first1=J.-C.

| title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)

| work=SIMBAD Astronomical Database

| date=1986 | bibcode=1986EgUBV........0M}}.

{{cite simbad

| title=* 12 Per

| access-date=2016-07-21 |mode=cs2}}

}}

Category:Perseus (constellation)

Category:F-type main-sequence stars

Persei, 12

Category:Spectroscopic binaries