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{{about|Y Centauri|y Centauri|HD 120987|γ Centauri|Gamma Centauri}}
{{about|Y Centauri|y Centauri|HD 120987|γ Centauri|Gamma Centauri}}
{{Starbox begin
{{Orphan|date=May 2015}}
| name = Y Centauri
}}
{{Starbox observe
| epoch=[[J2000.0]]
| constell=[[Centaurus]]
| ra={{RA|14|30|58.61656}}<ref name=hipparcos/>
| dec={{DEC|&minus;30|05|51.8706}}<ref name=hipparcos/>
| appmag_v=+8.90<ref name=ducati>{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|pages=0|author1=Ducati|first1=J. R.|year=2002}}</ref>
}}
{{Starbox character
| class = M4e - M7<ref name=gcvs/>
| b-v=+1.44<ref name=ducati/>
| u-b=+0.72<ref name=ducati/>
| variable = [[Semiregular variable star|SRb]]<ref name=gcvs>{{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|pages=02025|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009|display-authors=etal}}</ref>
}}
{{Starbox astrometry
| radial_v=&minus;6.00<ref>{{cite journal|bibcode=2006AstL...32..759G|title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|journal=Astronomy Letters|volume=32|issue=11|pages=759|author1=Gontcharov|first1=G. A.|year=2006|doi=10.1134/S1063773706110065}}</ref>
| prop_mo_ra=&minus;39.66<ref name=hipparcos/>
| prop_mo_dec=&minus;25.92<ref name=hipparcos/>
| parallax= 3.50
| p_error=0.93
| parallax_footnote=<ref name=hipparcos>{{cite journal|bibcode=2007A&A...474..653V|title=Validation of the new Hipparcos reduction|journal=Astronomy and Astrophysics|volume=474|issue=2|pages=653|author1=Van Leeuwen|first1=F.|year=2007|doi=10.1051/0004-6361:20078357|arxiv = 0708.1752 }}</ref>
}}
{{Starbox detail
| age =
| metal =
| mass =
| radius =
| rotation =
| luminosity = 5,317<ref name=mcdonald/>
| temperature = 2,907<ref name=mcdonald>{{cite journal|bibcode=2012MNRAS.427..343M|title=Fundamental parameters and infrared excesses of Hipparcos stars|journal=Monthly Notices of the Royal Astronomical Society|volume=427|pages=343|author1=McDonald|first1=I.|last2=Zijlstra|first2=A. A.|last3=Boyer|first3=M. L.|year=2012|doi=10.1111/j.1365-2966.2012.21873.x}}</ref>
}}
{{Starbox catalog
| names=[[Variable star designation|Y]]&nbsp;Cen, [[Henry Draper Catalogue|HD]]&nbsp;127233, [[Cordoba Durchmusterung|BD]]&minus;29°11116, [[Hipparcos catalogue|HIP]]&nbsp;70969, [[Smithsonian Astrophysical Observatory catalogue|SAO]]&nbsp;182618, [[Boss General Catalogue|GC]]&nbsp;19563, [[AAVSO]]&nbsp;1425-29
}}
{{Starbox reference
| Simbad = Y+Centaurus
}}
{{Starbox end}}


'''Y Centauri''' or '''Y Cen''' (''HD 127233'', ''HIP 70969'') is a [[variable star]] in the constellation of [[Centaurus]].<ref>{{cite web|url=http://frostydrew.org/stars.dc/star/id-264683/pss-obsy/|title=Y Cen - Frosty Drew Observatory & Sky Theatre|accessdate=30 July 2013}}</ref> Its position is RA 14h 30m 58.770s by dec 30°S 5' 52.00". The [[spectral class]] is M4 to M7.
'''Y Centauri''' or '''Y Cen''' (''HD 127233'', ''HIP 70969'') is a [[variable star]] in the constellation of [[Centaurus]].<ref>{{cite web|url=http://frostydrew.org/stars.dc/star/id-264683/pss-obsy/|title=Y Cen - Frosty Drew Observatory & Sky Theatre|accessdate=30 July 2013}}</ref> Its position is RA 14h 30m 58.770s by dec 30°S 5' 52.00". The [[spectral class]] is M4 to M7.

Revision as of 16:51, 21 July 2016

This article is about Y Centauri. For y Centauri, see HD 120987. For γ Centauri, see Gamma Centauri.
Y Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 14h 30m 58.61656s[1]
Declination −30° 05′ 51.8706″[1]
Apparent magnitude (V) +8.90[2]
Characteristics
Spectral type M4e - M7[3]
U−B color index +0.72[2]
B−V color index +1.44[2]
Variable type SRb[3]
Astrometry
Radial velocity (Rv)−6.00[4] km/s
Proper motion (μ) RA: −39.66[1] mas/yr
Dec.: −25.92[1] mas/yr
Parallax (π)3.50 ± 0.93 mas[1]
Distanceapprox. 900 ly
(approx. 290 pc)
Details
Luminosity5,317[5] L☉
Temperature2,907[5] K
Other designations
Y Cen, HD 127233, BD−29°11116, HIP 70969, SAO 182618, GC 19563, AAVSO 1425-29
Database references
SIMBADdata

Y Centauri or Y Cen (HD 127233, HIP 70969) is a variable star in the constellation of Centaurus.[6] Its position is RA 14h 30m 58.770s by dec 30°S 5' 52.00". The spectral class is M4 to M7.

The variability in the star was discovered by P. F. Fleming in 1895 and it was given a designation H52 in the Harvard Catalogue of Variable Stars.[7]

The type of variable is SRb.

The IRAS designation is 14280-2952. The star contains a 22 GHz water maser emission.[8]

References

  1. ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. ^ a b c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
  3. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1: 02025. Bibcode:2009yCat....102025S.
  4. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  5. ^ a b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427: 343. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.
  6. ^ "Y Cen - Frosty Drew Observatory & Sky Theatre". Retrieved 30 July 2013.
  7. ^ Pickering, Edward Charles (1905). "Second supplement to Catalogue of Variable Stars". Annals of Harvard College Observatory. 53: 143–153. Bibcode:1905AnHar..53..143P.
  8. ^ Lewis, B. M. (October 1997). "A renewed search for water maser emission from Mira Variables". The Astrophysical Journal. 114: 1602–1606. arXiv:astro-ph/9706207. Bibcode:1997AJ....114.1602L. doi:10.1086/118591.
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