Omega1 Cygni

{{short description|B-type subgiant star in the constellation Cygnus}}

{{Starbox begin

| name = Omega¹ Cygni

}}

{{Starbox image

| image = 250px

| caption = A light curve for V2014 Cygni, plotted from TESS data

}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Cygnus

| ra = {{RA|20|30|03.54116}}

| dec = {{DEC|+48|57|05.6446}}

| appmag_v = +4.93 - 4.96

}}

{{Starbox character

| class = B2.5 IV

| b-v = −0.09

| u-b = −0.68

| r-i =

| variable = β Cep {{nowrap|(λ Eri)}}

}}

{{Starbox astrometry

| radial_v = {{Val|−21.9|2.0}}

| prop_mo_ra = +10.883

| prop_mo_dec = +7.057

| parallax = 2.5878

| p_error = 0.1637

| parallax_footnote =

| absmag_v = −2.65

}}

{{Starbox detail

| source =

| mass = {{Val|8.1|0.2}}

| radius = {{solar radius calculator|type=LT|1549|16982|decimals=2}}{{efn|name=rad}}

| luminosity = 1,549

| temperature = 16,982

| gravity = 2.312

| metal_fe = 0.0

| rotational_velocity = 145

| age_myr = {{Val|33.2|4.5}}

}}

{{Starbox catalog

| names = ω¹ Cyg, 45 Cygni, BD+48°3142, FK5 3641, HD 195556, HIP 101138, HR 7844, SAO 49712, V2014 Cygni

}}

{{Starbox reference

|Simbad=ome01+Cyg

}}

Omega¹ Cygni, Latinized from ω¹ Cygni, is the Bayer designation for a solitary star in the northern constellation of Cygnus. It is visible to the naked eye with an apparent visual magnitude of 4.94. Based upon an annual parallax shift of {{val|2.59|ul=mas}}, it is estimated to lie roughly {{val|1,260|ul=light years|fmt=commas}} from the Sun. Relative to its neighbors, this star has a peculiar velocity of {{Val|25.7|2.2|u=km/s}}.

This is a somewhat evolved B-type subgiant star with a stellar classification of B2.5 IV. Telting and colleagues report it as a Beta Cephei variable with a high degree of confidence as they found regular pulsations in its spectrum in a high-resolution spectroscopy study published in 2006. Its brightness varies irregularly by 0.034 magnitude every 1.137 days.

Notes

{{notelist|notes=

{{Efn|name=rad|1=Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of {{val|fmt=commas|5,772|ul=K}}: $\sqrt{\biggl(\frac{5,772}{16,982}\biggr)^4 \cdot 1.549} = 4.55\ R_\odot.$ }}

}}

References

{{reflist|refs=

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| title=A high-resolution spectroscopy survey of β Cephei pulsations in bright stars

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{{citation |url=https://www.aavso.org/vsx/index.php?view=detail.top&oid=12934 |title=V2014 Cygni |website=International Variable Star Index |access-date=2020-09-02 }}

{{cite simbad

| title=* ome01 Cyg -- Pulsating variable Star

| access-date=2017-02-22 }}

}}

Category:B-type subgiants

Category:Beta Cephei variables

Category:Cygnus (constellation)

Category:Durchmusterung objects