Alpha Equulei

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

{{Starbox begin

| name = α Equulei

}}

{{Starbox image

| image=

{{Location mark

|image=Equuleus constellation map.svg|alt=|float=center|width=260

|label=|position=right

|mark=Red circle.svg|mark_width=12|mark_link=α Equ

|x=449|y=701

}}

|caption=Location of α Equulei (circled)

}}

{{Starbox observe

| epoch = J2000.0

| constell = Equuleus

| ra = {{RA|21|15|49.43192}}

| dec = {{DEC|+05|14|52.2430}}

| appmag_v = +3.919{{cite journal|bibcode=1984SAAOC...8...59C|title=Standardization of Broadband Photometry of Equatorial Standards|journal=South African Astronomical Observatory Circulars|volume=8|pages=59|last1=Cousins|first1=A. W. J.|year=1984}}(4.49/4.96)

}}

{{Starbox character

| class = G7III + kA3hA4mA9

| b-v = +0.529

| u-b = +0.284

| variable=

}}

{{Starbox astrometry

| radial_v = −15.71 ± 0.05

| prop_mo_ra = {{nowrap|+59.88 ± 0.23}}

| prop_mo_dec = {{nowrap|−94.09 ± 0.18}}

| parallax = 17.14

| p_error = 0.21

| parallax_footnote = {{cite journal | title=Validation of the new Hipparcos reduction | url=http://www.aanda.org/articles/aa/full/2007/41/aa8357-07/aa8357-07.html | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | s2cid=18759600 }}[http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=117056 Vizier catalog entry ]

| dist_pc =

| absmag_v = +0.17 (0.71 + 1.18)

}}

{{Starbox orbit

| reference = {{cite journal|bibcode=2002MNRAS.330..288G|title=Composite spectra Paper 11: α Equulei, an astrometric binary with an Am secondary|journal=Monthly Notices of the Royal Astronomical Society|volume=330|issue=2|pages=288|last1=Griffin|first1=R. E. M.|last2=Griffin|first2=R. F.|year=2002|doi=10.1046/j.1365-8711.2002.05030.x|doi-access=free}}

| period_unitless = 98.8098 days

| eccentricity = 0

| k1 = 16.34 ± 0.07

| k2 = 17.9 ± 0.3

}}

{{Starbox detail

| component1 = A

| mass = 2.3

| radius = 9.2

| luminosity = 52.5

| temperature = 5,100

| metal_fe =

| gravity =

| rotational_velocity = 20.0

| component2 = B

| mass2 = 2.0

| radius2 = 2.6

| luminosity2 = 26.3

| temperature2 = 8.150

| age_myr2 =740

}}

{{Starbox catalog

| names = Kitalphar, 8 Equulei, HR 8131, HD 202447, BD+04 4635, HIP 104987, SAO 126662, FK5 800, GC 29735

}}

{{Starbox reference

| Simbad = Alpha+Equulei

}}

{{Starbox end}}

Alpha Equulei (α Equulei, abbreviated Alpha Equ, α Equ), officially named Kitalpha {{IPAc-en|k|I|'|t|æ|l|f|@}},{{cite book

|last1=Kunitzsch |first1=Paul

|last2=Smart |first2=Tim

|date = 2006 |edition = 2nd rev.

|title = A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations

|publisher = Sky Pub |location = Cambridge, Massachusetts

|isbn = 978-1-931559-44-7

}}{{cite web | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | title=IAU Catalog of Star Names |accessdate=28 July 2016}} is a star in the constellation of Equuleus. It is a high proper-motion star only 190 light-years away.