23 Cygni

{{Starbox begin

| name = 23 Cygni

}}

{{Starbox observe

| epoch = J2000

| constell = Cygnus

| ra = {{RA|19|53|17.37873}}

| dec = {{DEC|+57|31|24.4810}}

| appmag_v = 5.14

}}

{{Starbox character

| type =

| class = B5 V

| b-v = −0.13

| u-b = +0.76

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−31.6|1.6}}

| prop_mo_ra = +5.768

| prop_mo_dec = +11.483

| parallax = 5.9155

| p_error = 0.1728

| parallax_footnote =

| absmag_v = −1.30

}}

{{Starbox detail

| source =

| mass = {{Val|4.7|0.64|0.53}}

| radius = {{Val|4.30|0.45}}

| luminosity = 611.53

| temperature = {{Val|14893|214|fmt=commas}}

| gravity = {{Val|3.82|0.08}}

| metal_fe = {{Val|−0.17|0.16}}

| rotational_velocity = 145

| age_myr = {{Val|26|32|19}}

}}

{{Starbox catalog

| names = {{odlist | F=23 Cyg | BD=+57°2084 | HD=188665 | HIP=97870 | HR=7608 | SAO=32085 | WDS=J19533+5731 }}

}}

{{Starbox reference

| Simbad=23+Cyg

}}

23 Cygni is a single, blue-white hued star in the northern constellation Cygnus. It is a faint star, visible to the naked eye, with an apparent visual magnitude of 5.14. The distance to this star, as estimated from its annual parallax shift of {{Val|5.9|ul=mas}}, is about 550 light years. It is moving closer to the Earth with a heliocentric radial velocity of −32 km/s, and is expected to come as near as {{Convert|50.99|pc|ly|0|order=flip|abbr=off|disp=out}} in around 5.6 million years. At that distance, the current star would be of magnitude 2.24.

This is an ordinary B-type main-sequence star of spectral type B5V, a star that is generating energy through hydrogen fusion at its core. It is roughly 26 million years old with 4.7 times the mass of the Sun and 4.3 times the Sun's radius. The star has a high rate of spin, having a projected rotational velocity of 145 km/s. It is radiating 612 times the Sun's luminosity from its photosphere at an effective temperature of 14,893 K.

References

{{reflist|refs=

At a distance (D) of 50.99 and an absolute magnitude (M) of −1.30, ignoring extinction (A), the apparent magnitude (m) would be:

: m = M + A + 5·log D + 5 ≈ −1.30 + 5·log 50.99 − 5 = 2.24

Ref.: {{citation

| title=Astrophysics of the Diffuse Universe

| series=Astronomy and Astrophysics Library

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| publisher=Springer Science & Business Media

| year=2004 | isbn=3540433627 | page=296

| url=https://books.google.com/books?id=kWzLAlkBqAAC&pg=PA296 }}

{{citation

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

| journal=Astronomy Letters

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| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015

| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}

{{citation

| last1=Fitzpatrick | first1=E. L. | last2=Massa | first2=D.

| title=Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry

| journal=The Astronomical Journal

| volume=129 | issue=3 | pages=1642–1662 | date=March 2005

| doi=10.1086/427855 | bibcode=2005AJ....129.1642F

| arxiv=astro-ph/0412542 | s2cid=119512018 | postscript=. }}

{{citation

| title=The Close Companion Mass-ratio Distribution of Intermediate-mass Stars

| display-authors=1 | last1=Gullikson | first1=Kevin

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| journal=The Astronomical Journal

| doi=10.3847/0004-6256/152/2/40 | postscript=.

| bibcode=2016AJ....152...40G | arxiv=1604.06456 | s2cid=119179065 | doi-access=free }}

{{citation

| title=UBV photometry and MK spectral classification of northern early-type stars at intermediate galactic latitudes.

| last1=Hill | first1=P. W. | last2=Lynas-Gray | first2=A. E.

| journal=Monthly Notices of the Royal Astronomical Society

| doi=10.1093/mnras/180.4.691 | bibcode=1977MNRAS.180..691H | doi-access=free }}

{{citation

| last1=Gontcharov | first1=G. A.

| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system

| journal=Astronomy Letters

| volume=32 | issue=11 | pages=759–771 | year=2006

| doi=10.1134/S1063773706110065 | postscript=.

| bibcode=2006AstL...32..759G | arxiv=1606.08053 | s2cid=119231169

}}

Category:B-type main-sequence stars

Category:Cygnus (constellation)

Category:Durchmusterung objects