View source for Sakurai's Object

{{Starbox begin
| name=Sakurai's Object
}}
{{Starbox image 
| image=[[File:Sakurai's Object cropped.jpg|280px]]
| caption=Sakurai's Object (photo by [[ESO]])
}}
{{Starbox observe
| epoch=[[J2000.0]] ([[International Celestial Reference System|ICRS]])
| constell = [[Sagittarius (constellation)|Sagittarius]]
| ra = {{RA|17|52|32.69}}<ref name=2mass>{{cite journal|bibcode=2003yCat.2246....0C|title=VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)|journal=VizieR On-line Data Catalog: II/246. Originally Published in: 2003yCat.2246....0C|volume=2246|last1=Cutri|first1=R. M.|last2=Skrutskie|first2=M. F.|last3=Van Dyk|first3=S.|last4=Beichman|first4=C. A.|last5=Carpenter|first5=J. M.|last6=Chester|first6=T.|last7=Cambresy|first7=L.|last8=Evans|first8=T.|last9=Fowler|first9=J.|last10=Gizis|first10=J.|last11=Howard|first11=E.|last12=Huchra|first12=J.|last13=Jarrett|first13=T.|last14=Kopan|first14=E. L.|last15=Kirkpatrick|first15=J. D.|last16=Light|first16=R. M.|last17=Marsh|first17=K. A.|last18=McCallon|first18=H.|last19=Schneider|first19=S.|last20=Stiening|first20=R.|last21=Sykes|first21=M.|last22=Weinberg|first22=M.|last23=Wheaton|first23=W. A.|last24=Wheelock|first24=S.|last25=Zacarias|first25=N.|year=2003}}</ref>
| dec = {{DEC|&minus;17|41|08.0}}<ref name=2mass/>
| appmag_v = {{nowrap|10.90 - 21<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|display-authors=|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}</ref>}}
}}
{{Starbox character
| appmag_2_passband = [[J band (infrared)|J]]
| appmag_2 = {{nowrap|11.555 ± 0.022<ref name=2mass/>}}
| class=variable
| b-v=+0.81<ref name=ALetters>{{cite journal|bibcode=1997AstL...23..623A|title=UBV photometry of Sakurai's object in 1996 and remarks about its evolutionary status|journal=Astronomy Letters|volume=23|pages=623|last1=Arkhipova|first1=V. P.|last2=Noskova|first2=R. I.|year=1997|issue=5}}</ref>
| u-b=+0.27<ref name=ALetters/>
| v-r=+0.57<ref name=ALetters/>
}}
{{Starbox astrometry
| dist_pc = 1800-5000<ref name = "photoionization">{{cite journal| last1= van Hoof|first1= P. A. M.|last2= Hajduk |first2= M. |year= 2007|title = The onset of photoionization in Sakurai's Object (V4334 Sagittarii)| journal = Astronomy & Astrophysics| volume= 471|issue= 1| pages = L9–L12| doi= 10.1051/0004-6361:20077932|arxiv = 0706.3857 |bibcode = 2007A&A...471L...9V |s2cid= 119324745}}</ref>
| radial_v={{nowrap|−170 ± 30<ref name=MNRAS>{{cite journal|last1=Eyres|first1=S. P. S.|last2=Geballe|first2=T. R.|last3=Tyne|first3=V. H.|last4=Evans|first4=A.|last5=Smalley|first5=B.|last6=Worters|first6=H. L.|title=Warm high-velocity CO in the wind of Sakurai's Object (= V4334 Sgr)|journal=Monthly Notices of the Royal Astronomical Society|date=May 2004|volume=350|issue=1|pages=L9–L12|doi=10.1111/j.1365-2966.2004.07808.x|arxiv = astro-ph/0403439 |bibcode = 2004MNRAS.350L...9E |s2cid=18500269}}</ref>}}
| prop_mo_ra=
| prop_mo_dec=
| parallax=
| p_error=
| parallax_footnote=
}}
{{Starbox detail
| mass= 0.6<ref name= "mass">{{cite journal |title= Convective-reactive proton-12C combustion in Sakurai's Object (V4334 Sagittarii) and implications for the evolution and yields from the first generations of stars |year= 2011 |journal= The Astrophysical Journal |page= 89 |volume= 727 |issue= 2 |first1= Falk |last1= Herwig |doi= 10.1088/0004-637X/727/2/89|arxiv = 1002.2241 |bibcode = 2011ApJ...727...89H |s2cid= 51428014 }}</ref>
| luminosity = ~10,000
}}
{{Starbox catalog
| names= [[Variable star designation|V4334]]&nbsp;Sgr, V4334&nbsp;Sagittarii, [[2MASS]]&nbsp;J17523269-1741080, DPV&nbsp;1, Sakurai's&nbsp;variable, [[Planetary nebula|PN]]&nbsp;G010.4+04.4, [[Guide Star Catalog|GSC2]]&nbsp;S2202011182877, Sakurai's&nbsp;Object, [[American Association of Variable Star Observers|AAVSO]]&nbsp;1746-17
}}
{{Starbox reference
| Simbad=NAME+SAKURAI'S+OBJECT
}}
{{Starbox end}}
'''Sakuri's Object''', also known as '''V4334 Sagittarii''', is a [[star]] in the [[Sagittarius (constellation)|Sagittarius]] [[constellation]].<ref>{{Cite web|url=https://www.eso.org/public/news/eso9619/|title=Sakurai's Object: A Once-in-a-Llifetime Experience - The Story of a Rarely Seen Stellar Explosion|last=information@eso.org|website=eso.org|access-date=2019-01-16}}</ref><ref>{{Cite web|url=https://physicsworld.com/a/inside-out-nebula-points-to-born-again-star/|title='Inside out' nebula points to 'born again' star|date=2018-08-11|website=Physics World|access-date=2019-01-16}}</ref><ref>{{Cite journal|url=http://iopscience.iop.org/article/10.1086/310241/fulltext/5313.text.html|title=Sakurai's Object|website=iopscience.iop.org|doi=10.1086/310241|s2cid=121491943 |access-date=2019-01-16}}</ref><ref>{{Cite web|url=https://www.iflscience.com/space/sakurai’s-object-evolution-witnessed-real-time/|title=Sakurai's Object Evolution Witnessed in Real Time|website=IFLScience|access-date=2019-01-16}}</ref><ref>{{Cite web|url=https://stardate.org/radio/program/sakurai%E2%80%99s-object|title=Sakurai's Object {{!}} StarDate Online|website=stardate.org|access-date=2019-01-16|archive-date=2020-09-20|archive-url=https://web.archive.org/web/20200920163554/https://stardate.org/radio/program/sakurai%E2%80%99s-object|url-status=dead}}</ref><ref>{{Cite journal|last1=Hajduk|first1=Marcin|last2=Zijlstra|first2=Albert A.|last3=Herwig|first3=Falk|last4=van Hoof|first4=Peter A. M.|last5=Kerber|first5=Florian|last6=Kimeswenger|first6=Stefan|last7=Pollacco|first7=Don L.|last8=Evans|first8=Aneurin|last9=Lopéz|first9=José A.|date=2005-04-08|title=The real-time stellar evolution of Sakurai's object|url=https://www.ncbi.nlm.nih.gov/pubmed/15821085|journal=Science (New York, N.Y.)|volume=308|issue=5719|pages=231–233|doi=10.1126/science.1108953|issn=1095-9203|pmid=15821085|bibcode=2005Sci...308..231H|s2cid=45275698}}</ref><ref>{{Cite journal|last1=Hinkle|first1=Kenneth H.|last2=Joyce|first2=Richard R.|last3=Matheson|first3=Thomas|date=2017-01-01|title=Sakurai's Object Continues to Brighten and Expand|journal=American Astronomical Society Meeting Abstracts #229|url=http://adsabs.harvard.edu/abs/2017AAS...22915411H|volume=229|pages=154.11|bibcode=2017AAS...22915411H}}</ref>

It is thought it was a [[white dwarf]] that swelled and became a [[red giant]]. It is at the center of a [[planetary nebula]]. Sakurai's Object and other similar stars are expected to end up as [[helium]]-rich white dwarfs. They go through a "born-again" giant phase back to the white dwarf cooling track. 

Sakuri's Object was discovered in 1996.<ref>{{Cite journal|last1=Van de Steene|first1=G. C.|last2=van Hoof|first2=P. A. M.|last3=Kimeswenger|first3=S.|last4=Zijlstra|first4=A. A.|last5=Avison|first5=A.|last6=Guzman-Ramirez|first6=L.|last7=Hajduk|first7=M.|last8=Herwig|first8=F.|date=October 2016|title=The very fast evolution of Sakurai's object|journal=Proceedings of the International Astronomical Union|volume=12|issue=S323|pages=380–381|doi=10.1017/S1743921317000588|arxiv=1701.06804|s2cid=119207851|issn=1743-9213}}</ref> 

==References==
{{reflist}}

[[Category:Stars]]