Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)
Valentine Nebula SH2-174, Philippe Renaud
Valentine Nebula SH2-174
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Valentine Nebula SH2-174

Valentine Nebula SH2-174, Philippe Renaud
Valentine Nebula SH2-174
Powered byPixInsight

Valentine Nebula SH2-174

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Description

It is one of the northernmost planetary nebulae in the sky. It is located about 3° north of γ Cephei 
Its sharply northern declination means that it can be observed almost exclusively from the northern hemisphere, where it is circumpolar to tropical latitudes.
During the 1990s, the hypothesis was put forward that it was a planetary nebula, whose central star slipped over time out of the gaseous envelope it created for itself , since its dimensions were too small to be an H II region, but comparable to those of a planetary nebula region. This ionizing star would be the white dwarf cataloged GD 561, located outside the cloud. The distance, from which the dimensions were derived, was obtained by the study of radial velocity, and is stated to be approximately 300 pc (∼978 ly)

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Valentine Nebula SH2-174, Philippe Renaud

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