Kappa Pegasi

{{Short description|Triple star system in the constellation Pegasus}}

{{Starbox begin

| name=Kappa Pegasi

}}

{{Starbox image

| image=

{{Location mark

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

|label=|position=right

|mark=Red circle.svg|mark_width=8|mark_link=λ Peg

|x=735|y=330

}}

|caption=Location of Kappa Pegasi (circled)

}}

{{Starbox observe

| epoch=J2000

| ra={{RA|21|44|38.7344}}

| dec={{DEC|+25|38|42.128}}

| appmag_v=4.159

| constell=Pegasus }}

{{Starbox character

| class=F5IV

| b-v=+0.44

| u-b=+0.03

| variable= }}

{{Starbox astrometry

| radial_v=−8.1

| prop_mo_ra=46.66

| prop_mo_dec=13.47

| parallax=28.90

| p_error=0.18

| parallax_footnote=

| absmag_v= }}

{{Starbox orbit

|reference=

|primary=κ Peg A

|name=κ Peg B

|period_unitless= 4227.05 ± 0.55 d

|axis_unitless= 8.139 ± 0.062 AU

|eccentricity= 0.3180 ± 0.0015

|inclination= 107.872 ± 0.028

|node= 109.140 ± 0.057

|periarg= 304.14 ± 0.21

|periastron=2452398.0 ± 2.0

}}

{{Starbox orbit

|reference=

|primary=κ Peg Ba

|name=κ Peg Ba

|period_unitless = {{nowrap|5.9714971 ± 0.0000013}}

|axis_unitless=0.08715 ± 0.00090 AU

|eccentricity= 0.0073 ± 0.0013

|inclination= 124.9 ± 3.7

|node= 359.1 ± 5.9

|periarg= 359.1 ± 5.9

|periastron=2452402.225 ± 0.097

}}

{{Starbox detail

| source =

| component1 = A

| mass= {{val|1.391|0.044}}

| radius=

| luminosity=

| temperature=6,579

| metal_fe=-0.37

| rotational_velocity=35

| gravity=3.00

| age= }}

{{Starbox detail|no_heading=y

| component1 = Ba

| mass = {{Val|1.616|0.049}}

| component2 = Bb

| mass2 = {{val|0.835|0.026}}

}}

{{Starbox catalog

| names=10 Pegasi, HR 8315, BD+24 4463, HD 206901, SAO 89949, HIP 107354. }}

{{Starbox reference

|Simbad=kap+Peg

}}

Kappa Pegasi (κ Peg, κ Pegasi) is a triple star system in the constellation Pegasus. It has an apparent brightness of +4.13 magnitude and belongs to the spectral class F5IV; a subgiant star. No proper name is associated to this star.{{cite web

|title=Kappa Pegasi

|first=Jim

|last=Kaler

|url=http://stars.astro.illinois.edu/sow/kappapeg.html

|access-date=2016-08-02

|archive-url=https://web.archive.org/web/20161104154908/http://stars.astro.illinois.edu/sow/kappapeg.html

|archive-date=2016-11-04

|url-status=dead

}}

This system consists of two components, designated Kappa Pegasi A and B, that are separated by an angular distance of 0.235 arcseconds. The binary nature of this pair was discovered by Sherburne W. Burnham in 1880. They orbit around each other every 11.6 years with a semimajor axis of 0.4 arcseconds. The brighter member of the pair, Kappa Pegasi B, is actually a spectroscopic binary, with the components designated Kappa Pegasi Ba and Kappa Pegasi Bb. They orbit about each other every six days. There is a fourth component, Kappa Pegasi C, which may be an optical companion.

References

{{reflist|refs=

{{cite journal | author=Perryman, M. A. C. |display-authors=etal | title=The HIPPARCOS Catalogue | journal=Astronomy & Astrophysics | volume=323 | pages=L49–L52 |date=April 1997 | bibcode=1997A&A...323L..49P }}

{{cite web | title=kap Peg -- Spectroscopic binary | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=kap+Peg | access-date=2010-05-25 }}

{{cite journal | last=Balachandran | first=Suchitra | title=Lithium depletion and rotation in main-sequence stars | journal=Astrophysical Journal, Part 1 | volume=354 | date=May 1, 1990 | pages=310–332 | doi=10.1086/168691 | bibcode=1990ApJ...354..310B

}}

{{cite journal |author1=Bernacca, P. L. |author2=Perinotto, M. | title=A catalogue of stellar rotational velocities | journal=Contributi Osservatorio Astronomico di Padova in Asiago | volume=239 | issue=1 | date=1970 |page=1 | bibcode=1970CoAsi.239....1B }}

{{cite journal |author1=Johnson, H. L. |author2=Iriarte, B. |author3=Mitchell, R. I. |author4=Wisniewskj, W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | date=1966 |page=99 | bibcode=1966CoLPL...4...99J }}

{{cite journal | author=Muterspaugh, Matthew W. |display-authors=etal | title=PHASES Differential Astrometry and Iodine Cell Radial Velocities of the κ Pegasi Triple Star System | journal=The Astrophysical Journal | volume=636 | issue=2 | pages=1020–1032 |date=January 2006 | doi=10.1086/498209 | bibcode=2006ApJ...636.1020M |arxiv = astro-ph/0509406 |s2cid=18533602 }}

{{cite journal |bibcode=2021AJ....161...40G |title=ARMADA. I. Triple Companions Detected in B-type Binaries α del and ν Gem |last1=Gardner |first1=Tyler |last2=Monnier |first2=John D. |last3=Fekel |first3=Francis C. |last4=Schaefer |first4=Gail |last5=Johnson |first5=Keith J. C. |last6=Le Bouquin |first6=Jean-Baptiste |last7=Kraus |first7=Stefan |last8=Anugu |first8=Narsireddy |last9=Setterholm |first9=Benjamin R. |last10=Labdon |first10=Aaron |last11=Davies |first11=Claire L. |last12=Lanthermann |first12=Cyprien |last13=Ennis |first13=Jacob |last14=Ireland |first14=Michael |last15=Kratter |first15=Kaitlin M. |last16=Ten Brummelaar |first16=Theo |last17=Sturmann |first17=Judit |last18=Sturmann |first18=Laszlo |last19=Farrington |first19=Chris |last20=Gies |first20=Douglas R. |last21=Klement |first21=Robert |last22=Adams |first22=Fred C. |journal=The Astronomical Journal |year=2021 |volume=161 |issue=1 |page=40 |doi=10.3847/1538-3881/abcf4e |arxiv=2012.00778 |s2cid=227247696 |doi-access=free }}

}}

Pegasus, Kappa

Pegasi, 10

Category:Pegasus (constellation)

Category:F-type subgiants

Category:Spectroscopic binaries

206901

8315

Category:Durchmusterung objects

Category:Triple star systems

107354