sponsored by psychohistorian.org

DOCdb

Deep Sky Observer's Companion – the online database

 

Welcome, guest!

If you've already registered, please log in,

or register an observer profile for added functionality.

List:

log in to manage your observing lists

 browse:

 

 position:

 

 next:

 

 options:

summary

rename

prune

trim

remove

close

copy

combine

plan

bookmark

load

new

delete

marathon

favourite!

Full database:

Entire DOCdb database of 18,816 objects.

 browse:

 position:

OH 231.8+4.2 (4,804 of 18,816)

 next:

oc gc pln bn dn gx gxcl ast aka lost

Object:

list

bookmark

finder chart

altitude today

altitude (year)

 search:

½°, , in DOCdb

show browsing

Calabash Nebula

OH 231.8+4.2, OH 231.8, OH 0739-14, Calabash Nebula, Rotten Egg Nebula

RA: 07h 42m 16.95s
Dec: −14° 42′ 50.2″

Con: Puppis
Ch: MSA:295, U2:274, SA:12

Ref: SIMBAD, [1989A&A...211..409I]

(reference key)

Type: reflection nebula

Mag: B=?, V=?

Size: ?
PA: ?

Image gallery

Photos  (3)

Select a photo and click the button to view

Remarks

Lies within Messier 46, NGC 2437, as does the planetary nebula NGC 2438.

Published comments

Reipurth, B. (1987)

OH 0739-14 an old star blowing bubbles [1987IAUS..122..247R]

Two large bipolar bubbles emanating from the OH/IR star OH0739-14 have been discovered...

The OH/IR star OH0739-14, also known at OH231.8+4.2, has a faint optical counterpart, a small elongated nebula, which reflects the light of an embedded M9 giant or supergiant...

Deep CCD images of OH0739-14 through various interference filters have been carried out at the Danish 1.5m telescope at ESO, La Silla. Fig. 1 shows an H-alpha image, on which three basic features of the object can be identified. Firstly, the optical reflection nebulosity is seen as two bright, rather narrow lanes. Secondly, an obscuring disk cuts across these two lanes, and thirdly, two large shock-excited bubbles surround the reflection lanes...

The outflow is probably generated by the wind from a hot accretion-disk surrounding a companion white dwarf. The companion accretes matter from the mass-losing red giant, which is at the very end of AGB evolution. We are most likely here witnessing the rapid evolution immediately preceding the formation of a bipolar planetary nebula.

Icke, V. & Preston, H.L. (1989)

The dynamics of the Calabash Nebula [1989A&A...211..409I]

".. in the remarkable nebula OH 231.8+4.2 which, because of its peculiar shape (Fig. 1; Reipurth, 1987) we propose to call the 'Calabash Nebula'. "

Kastner, J.H. (1999)

High-resolution, near-IR spectroscopy and imaging of the Egg and Rotten Egg nebulae (AFGL 2688 and OH 231.8+4.2) [1999IAUS..191..431K]

The evolved bipolar nebula OH 231.8+4.2 is host to a Mira, QX Pup, at its core. We used the DLIRIM system at Kitt Peak to obtain the first direct imags of QX Pup in the near-infrared... In subarcsecond resolution the star lies midway between the lobes of the OH 231.8+4.2 reflection nebula... the central Mira appears remarkably "normal" given its position at the heart of such an unusual object.

Leal-Ferreira, M. L. et al. (2012)

Rotten Egg nebula: The magnetic field of a binary evolved star [2012A&A...540A..42L]

Located at a distance of about 1540 pc, the bipolar nebula OH 231.8+4.2 contains a binary system in its core, where a Main Sequence type A star accompanies an evolved star - the Mira variable QX Pup.

Favourite lists

Lacaille's catalogue

The Messier objects

Dunlop's catalogue

The Bennett objects

The Caldwell list

Named DSOs

Object search

First search phrase

    and

Second search phrase

Type of object to include:

open cluster
globular cluster
planetary nebula
bright nebula
dark nebula
galaxy
galaxy cluster
asterism & stars
unverified/lost
nova

The Bug Report

DOCdb is still in beta-release.

Known issues, feature requests, and updates on bug fixes, are here:

> Bug Report

Feedback

Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!

> Contact us

Help!

DOCdb is a free online resource that exists to promote deep sky observing.

You could help by sharing your observations, writing an article, digitizing and proof-reading historical material, and more.

> Find out more

Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.