22 Cygni

{{Starbox begin

| name = 22 Cygni

}}

{{Starbox observe

| epoch = J2000

| constell = Cygnus

| ra = {{RA|19|55|51.75718}}

| dec = {{DEC|+38|29|12.154}}

| appmag_v = 4.95

}}

{{Starbox character

| type =

| class = B5 IV

| b-v = {{Val|−0.086|0.009}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−14.8|2.2}}

| prop_mo_ra = +6.559

| prop_mo_dec = −0.469

| parallax = 3.0418

| p_error = 0.2388

| parallax_footnote =

| absmag_v = −3.18

}}

{{Starbox orbit

| reference =

| period_unitless = {{Val|78.2|0.4|u=days}}

| eccentricity = {{Val|0.17|0.13}}

| periastron = {{Val|2443734.5|2.1|u=JD}}

| periarg = {{Val|139|11}}

| k1 = {{Val|20.7|3.1}}

}}

{{Starbox detail

| source =

| component1 = 22 Cyg A

| mass = {{Val|7.9|0.4}}

| radius = 5.6

| luminosity = 7,305

| temperature = 15,200

| gravity = 3.35

| metal_fe =

| rotational_velocity = 30

| age_myr = {{Val|37.3|4.2}}

}}

{{Starbox catalog

| names = {{odlist | F=22 Cyg | BD=+38°3817 | HD=188892 | HIP=98068 | HR=7613 | SAO=69101 }}

}}

{{Starbox reference

| Simbad=22+Cyg

}}

22 Cygni is a binary star system in the northern constellation of Cygnus. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 4.95. The annual shift of {{Val|3.0|ul=mas}} yields a distance estimate of around 1,070 light years. It is moving closer to the Earth with a heliocentric radial velocity of −15 km/s.

This is a single-lined spectroscopic binary with an orbital period of 78.2 days and an eccentricity of roughly 0.17. The visible component has a stellar classification of B5 IV that matches a B-type subgiant star. It is 37 million years old with a projected rotational velocity of 30 km/s and has an essentially solar metallicity, within the margin of error. The star has eight times the mass of the Sun and about 5.6 times the Sun's radius. It is radiating 7,305 times the Sun's luminosity from its photosphere at an effective temperature of 15,200 K.

References

{{reflist|refs=

{{citation

| title=XHIP: An extended hipparcos compilation

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

| journal=Astronomy Letters

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

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

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

{{citation

| title=Elemental abundance analyses with DAO spectrograms - XIX. The superficially normal B stars zeta Draconis, epsilon Lyrae, 8 Cygni and 22 Cygni

| last1=Adelman | first1=Saul J. | postscript=.

| journal=Monthly Notices of the Royal Astronomical Society

| volume=296 | issue=4 | pages=856–862 | date=June 1998

| doi=10.1046/j.1365-8711.1998.01426.x | bibcode=1998MNRAS.296..856A | doi-access=free }}

{{citation

| last1=Tetzlaff | first1=N. | last2=Neuhäuser | first2=R.

| last3=Hohle | first3=M. M. | display-authors=1

| title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun

| journal=Monthly Notices of the Royal Astronomical Society

| volume=410 | issue=1 | pages=190–200 | date=January 2011

| doi=10.1111/j.1365-2966.2010.17434.x | doi-access=free | postscript=.

| bibcode=2011MNRAS.410..190T | arxiv=1007.4883 | s2cid=118629873 }}

{{citation

| title=The Frequency and Formation Mechanism of B2--B5 Main-Sequence Binaries

| last1=Abt | first1=Helmut A. | last2=Gomez | first2=Ana E.

| last3=Levy | first3=Saul G. | display-authors=1

| journal=Astrophysical Journal Supplement | postscript=.

| volume=74 | page=551 | date=October 1990

| doi=10.1086/191508 | bibcode=1990ApJS...74..551A }}

{{citation

| last1=Hohle | first1=M. M. | last2=Neuhäuser | first2=R.

| last3=Schutz | first3=B. F. | display-authors=1

| title=Masses and luminosities of O- and B-type stars and red supergiants

| journal=Astronomische Nachrichten

| volume=331 | issue=4 | page=349 | date=April 2010

| doi=10.1002/asna.200911355 | postscript=.

| bibcode=2010AN....331..349H | arxiv=1003.2335 | s2cid=111387483 }}

{{citation

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

| journal=Astronomy Letters

| last1=Gontcharov | first1=G. A.

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

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

| doi=10.1134/S1063773706110065 | s2cid=119231169

| postscript=. }}

{{citation

| last=Lesh | first=Janet Rountree

| title=The Kinematics of the Gould Belt: an Expanding Group?

| journal=Astrophysical Journal Supplement

| volume=17 | page=371 | date=December 1968

| doi=10.1086/190179 | postscript=.

| bibcode=1968ApJS...17..371L | doi-access=free}}

{{citation

| display-authors=1 | last1=Abt | first1=Helmut A.

| last2=Levato | first2=Hugo | last3=Grosso | first3=Monica

| title=Rotational Velocities of B Stars | journal=The Astrophysical Journal

| volume=573 | issue=1 | pages=359–365 | date=July 2002

| doi=10.1086/340590 | bibcode=2002ApJ...573..359A | doi-access=free }}

{{citation

| last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L.

| last3=Covino | first3=S. | last4=Pozzi | first4=A.

| title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)

| display-authors=1 | edition=Third | journal=Astronomy and Astrophysics

| volume=367 | pages=521–524 | date=February 2001

| doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P

| arxiv=astro-ph/0012289 | s2cid=425754 | postscript=. }}

}}

Category:B-type subgiants

Category:Cygnus (constellation)

Category:Durchmusterung objects

Category:Spectroscopic binaries