Main Page | See live article | Alphabetical index NGC 2346 is a planetary nebula on the celestial equator in the constellation of Monoceros. It is bright and conspicuous and has been extensively studied. Among its most remarkable characteristics is its unusually cool central star, which is a spectroscopic binary. The double star, which has a period of about 16 days, is also variable, probably due to dust in orbit around it. The dust itself is heated by the central star and so NGC 2346 is unusually bright in the infrared part of the spectrum. 2346 This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.