Editing Calabash Nebula (section)

{{Short description|Protoplanetary nebula in the constellation of Puppis}}
{{Infobox nebula
| name = Calabash Nebula
| image = The Calabash clash.jpg
| caption = The Calabash Nebula, as taken by [[Hubble Space Telescope]]
| type = protoplanetary
| epoch = [[J2000]]
| ra = {{RA|07|42|16.83}}<ref name="simbad">{{Harv|SIMBAD|2007}}</ref>
| dec = {{DEC|-14|42|52.1}}<ref name="simbad" />
| dist_ly = [[1 E19 m|4,200]]<ref name="Kastneretal1998">{{Harv|Kastner|Weintraub|Merrill|Gatley|1998}}</ref>
| dist_pc = 1,300
| appmag_v = 9.47<ref name="simbad" />
| size_v = 1{{prime}}{{Citation needed|date=February 2007}}
| constellation = [[Puppis]]
| radius_ly = 0.7{{Ref_label|A|a|none}}
| absmag_v = -1.4{{Ref_label|B|b|none}}
| notes = 
| names = OH 231.84 +4.22,<ref name="simbad" /> <br />Rotten Egg Nebula<ref name="simbad" />
}}
{{starbox begin
|name=QX Puppis
}}
{{starbox image
| image = [[File:QXPupLightCurve.png|220px]]
| caption = A [[near-infrared]] ([[Photometric_system#Photometric_letters|I band]]) light curve for QX Puppis, plotted from [[AAVSO]] data<ref name="aavso">{{cite web |title=Download Data |url=https://www.aavso.org/data-download |website=aavso.org |publisher=AAVSO |access-date=1 October 2021}}</ref>
}}
{{starbox character
|type=[[OH/IR star]]<ref name="simbad" />
|class=M10III + A<ref name="simbad" />
|variable=[[Mira variable|Mira]]<ref name="simbad" />
}}
{{Starbox reference
|Simbad=QX+Pup
}}
{{starbox end}}
The '''Calabash Nebula''', also known as the '''Rotten Egg Nebula''' or by its technical name '''OH 231.84 +4.22''', is a [[protoplanetary nebula]] (PPN) 1.4 [[light year]]s (13 Pm) long and located some 5,000 light years (47 Em) from [[Earth]] in the constellation [[Puppis]]. The name "Calabash Nebula" was first proposed in 1989 in an early paper on its expected nebular dynamics, based on the nebula's appearance.<ref name="IckePreston1989">{{Harv|Icke|Preston|1989}}</ref>
The Calabash is almost certainly a member of the open cluster [[Messier 46]], as it has the same distance, radial velocity, and proper motion.<ref name=vickers2015>
{{cite journal
 |author=Vickers S.B. |author2=Frew D.J. |author3=Parker Q.A. |author4=Bojicic I.S.
 |date=2015
 |title=New light on Galactic post-asymptotic giant branch stars - I. First distance catalogue
 |journal=[[Monthly Notices of the Royal Astronomical Society]]
 |volume=447 |issue=2 |pages=1673–1691
 |arxiv=1403.7230
 |bibcode=2015MNRAS.447.1673V
 |doi=10.1093/mnras/stu2383
|doi-access=free }}</ref> The central star is '''QX Puppis''', a [[binary star|binary]] composed of a very cool [[Mira variable]] and an [[A-type main-sequence star]].