The Bow Tie Nebula (AlBroxton)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: Bow-Tie nebula · NGC 40

The Bow Tie Nebula

NGC40 (also known as the Bow-Tie Nebula and Caldwell 2) is a planetary nebula discovered by W.F.Herschel Nov 25 1788, and is composed of hot gas around a dying star. The star has ejected its outer layer which has left behind a smaller, hot star with a temperature on the surface of about 50,000 degrees (Celsius). Radiation from the star causes the shed outer layer to heat to about 10,000 degrees (Celsius) and is about one light-year across. About 30,000 years from now, scientists theorize that NGC40 will fade away, leaving only a white dwarf star approximately the size of Earth. Distance 3,500 light years away.

Observation Notes : bright, large, and elongated 1.5X1. Central star obvious at 200X. The color is grey at all powers. At 200X and above from one of our best locations, the nebula shows off two brighter ends that look like "polar caps" on Mars. The western cap is larger and brighter. From a poorer site on a night I rated 5/10 for seeing and transparency, the brighter parts of the planetary make it appear to have a spiral shape. The "polar cap" effect only appears on the best of nights.

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Allen Broxton

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Status	Basic success
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Astrometry.net job	3517275
PixInsight job	n/a
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