page_title: Calabash Nebula
section_title: Ground-based imagery
hierarchical_section_title: Calabash Nebula / Ground-based imagery
caption_attribution_description: English: NGC 2438 and the Calabash Nebula Picture Details: Optics 32-inch Schulman Telescope (RC Optical Systems), Acquired remotely Camera SBIG STX 16803 CCD Camera Filters AstroDon Gen II Dates December 2012 - January 2013 Location Mount Lemmon SkyCenter Exposure HaLRGB = 15:4:4:4 hours Acquisition ACP Observatory Control Software (DC-3 Dreams),TheSky (Software Bisque), Maxim DL/CCD (Cyanogen), FlatMan XL (Alnitak) Processing CCDStack (CCDWare), Photoshop CS5 (Adobe), PixInsight Credit Line and Copyright Adam Block/Mount Lemmon SkyCenter/University of Arizona .
context_page_description: The Calabash Nebula, also known as the Rotten Egg Nebula or by its technical name OH 231.84 +4.22, is a protoplanetary nebula 1.4 light years long and located some 5,000 light years from Earth in the constellation Puppis. The name "Calabash Nebula" was first proposed in 1989 in an early paper on the expected nebular dynamics, based on the nebula's appearance
  The Calabash is an almost certain member of the open cluster Messier 46, as it has the same distance, radial velocity, and proper motion.
context_section_description: In wide field images, the Calabash nebula is visible near the bright planetary nebula NGC 2438 in deep photographs. Although the Calabash Nebula is at the same distance as M46, NGC 2438 is a larger object in the foreground.
caption: NGC 2438 (upper left) and the Calabash Nebula (lower right) taken from the Mount Lemmon SkyCenter using the 0.8 m Schulman Telescope.
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