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Observation by Alan Thomas: NGC40 Planetary Nebula in Cepheus

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Alan Thomas


Alan Thomas


2021 Oct 15 - 19:27


2021 Oct 16 - 11:35


The Bow Tie Nebula (NGC40)

  • Unistellar eQuinox 112mm reflector



Norbreck Observatory, Warrington, Cheshire, UK

Target name

NGC40 The Bow Tie Nebula in Cepheus


NGC40 Planetary Nebula in Cepheus

About this image

Planetary nebula discovered by William Herschel in November 1788. Distance c.3-3,500ly. Apparent size 36x24". Actual diameter 0.6ly.

Chandra X-ray data ( indicate that a 2 million mph stellar wind is being emitted by the central star, compressing and heating an outer shell of gas. In about 30,000 years the nebula is expected to have faded away, leaving an ultradense, Earth-sized white dwarf behind.

Glad I managed to observe it before it's too late!

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