30 Cygni

{{Starbox begin

| name = 30 Cygni

}}

{{Starbox observe

| epoch = J2000

| constell = Cygnus

| ra = {{RA|20|13|18.05358}}

| dec = {{DEC|+46|48|56.4424}}

| appmag_v = 4.83 {{nowrap|(4.81 - 4.84)}}

}}

{{Starbox character

| class = A5IIIn

| b-v = +0.10

| u-b = +0.17

| variable = suspected

}}

{{Starbox astrometry

| radial_v = −26.00

| prop_mo_ra = +13.83

| prop_mo_dec = +3.00

| parallax = 5.34

| p_error = 0.33

| parallax_footnote =

| absmag_v = −1.55

}}

{{Starbox detail

| mass = 2.1

| temperature = 7,893

| luminosity = 310

| radius = 9.91

| gravity = 3.61

| metal_fe = −0.55

| rotational_velocity = 145

}}

{{Starbox catalog

| names = ο¹ Cygni, BD+46°2881, GC 28091, HIP 99639, HR 7730, HD 192514, SAO 49332, WDS J20136+4644D, CCDM J20135+4646D

}}

{{Starbox reference

| Simbad = 30+Cygni

}}

File:Albireo 20150919.jpg A and B at lower right]]

30 Cygni (ο¹ Cygni) is a class A5III (white giant) star in the constellation Cygnus. Its apparent magnitude is 4.83 and it is approximately 610 light years away based on parallax.

The Bayer letter ο (omicron) has been variously applied to two or three of the stars 30, 31, and 32 Cygni. 30 Cygni has sometimes been designated as ο¹ Cygni with the other two stars being ο² and ο³ respectively. For clarity, it is preferred to use the Flamsteed designation 30 Cygni rather than one of the Bayer designations.

30 Cygni is about six arc-minutes from 31 Cygni A and seven arc-minutes from 31 Cygni B. That pair is known as ο¹ Cygni, while ο² Cygni is a degree away. Both ο¹ and ο² are 4th magnitude stars.

References

{{reflist|refs=

{{cite journal|bibcode=2004yCat.4027....0K|title=VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)|journal=VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002)|volume=4027|last1=Kostjuk|first1=N. D.|year=2004}}

{{cite journal |bibcode=2024A&A...691A..98K |title=Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost |last1=Khalatyan |first1=A. |last2=Anders |first2=F. |last3=Chiappini |first3=C. |last4=Queiroz |first4=A. B. A. |last5=Nepal |first5=S. |last6=Dal Ponte |first6=M. |last7=Jordi |first7=C. |last8=Guiglion |first8=G. |last9=Valentini |first9=M. |last10=Torralba Elipe |first10=G. |last11=Steinmetz |first11=M. |last12=Pantaleoni-González |first12=M. |last13=Malhotra |first13=S. |last14=Jiménez-Arranz |first14=Ó. |last15=Enke |first15=H. |last16=Casamiquela |first16=L. |last17=Ardèvol |first17=J. |journal=Astronomy and Astrophysics |date=2024 |volume=691 |pages=A98 |doi=10.1051/0004-6361/202451427 |arxiv=2407.06963 }}

{{cite journal | title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | s2cid=18759600 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2099639 Vizier catalog entry]

{{citation | last1=Jaschek | first1=M. | title=Catalogue of selected spectral types in the MK system | journal=Bulletin d'Information du Centre de Données Stellaires | volume=15 | issue=121 | pages=121 |date=July 1978 | bibcode=1978BICDS..15..121J }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=III/42/catalog&Name=192514 Vizier catalog entry]

{{cite journal |last1=McDonald |first1=I. |last2=Zijlstra |first2=A. A. |last3=Watson |first3=R. A. |date=2017-10-01 |title=Fundamental parameters and infrared excesses of Tycho-Gaia stars |journal=Monthly Notices of the Royal Astronomical Society |volume=471 |pages=770–791 |doi=10.1093/mnras/stx1433 |doi-access=free |issn=0035-8711|arxiv=1706.02208 |bibcode=2017MNRAS.471..770M }} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/MNRAS/471/770&RAJ2000=303.325223 30 Cygni's database entry] at VizieR.

{{citation | display-authors=1 | last1=Kharchenko | first1=N. V. | last2=Scholz | first2=R.-D. | last3=Piskunov | first3=A. E. | last4=Röser | first4=S. | last5=Schilbach | first5=E. | bibcode=2007AN....328..889K | title=Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations | journal=Astronomische Nachrichten | volume=328 | issue=9 | pages=889 | year=2007 | doi=10.1002/asna.200710776|arxiv = 0705.0878 | s2cid=119323941 }}

{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|display-authors=etal|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}

{{cite journal|bibcode=1986EgUBV........0M|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|journal=Catalogue of Eggen's UBV Data|last1=Mermilliod|first1=J.-C.|year=1986}}

{{cite journal|bibcode=2012A&ARv..20...51V|title=Interferometric observations of rapidly rotating stars|journal=The Astronomy and Astrophysics Review|volume=20|pages=51|last1=Van Belle|first1=Gerard T.|year=2012|issue=1|doi=10.1007/s00159-012-0051-2|arxiv = 1204.2572 |s2cid=119273474}}

}}

Category:Cygnus (constellation)

Category:A-type giants

Cygni, 30

Category:Durchmusterung objects

099639

7730

192514