Sh2-174 (LBN 598) Valentine Rose Nebula (Randal Healey)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep)

Sh2-174 (LBN 598) Valentine Rose Nebula, Randal Healey

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Sh2-174 (LBN 598) Valentine Rose Nebula

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Sh2-174 (LBN 598) Valentine Rose Nebula

This one was very difficult to process. It's very dim and took a lot of work despite 30+ hours of data. It is also very cropped down form the original FOV. SH2-174 is a planetary nebula visible in the constellation of Cepheus.

It is one of the northern most planetary nebulae of the celestial vault; γ Cephei is located about 3 ° north of Alrai and is visible in long exposure photos taken with a powerful amateur telescope. Its strongly northern declination means that it can be observed almost exclusively from the northern hemisphere, where it is circumpolar up to tropical latitudes.

The cloud, cataloged as a generic emission nebula in the 1960s, has never shown signs of star formation in progress, nor was the ionizing star of its gases known; during the nineties the hypothesis was advanced that it was a planetary nebula, whose central star has over time slipped out of the gaseous envelope it created itself, given that its dimensions were too small to be an H II region, but comparable to those of a normal planetary nebula. This ionizing star would be the white dwarf cataloged as GD 561, located outside the cloud. The distance, from which the dimensions were derived, was obtained through the study of the radial velocity, and is indicated around 300 parsecs (about 980 light years).

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Status	Basic success
Started	...
Astrometry.net job	5298504
PixInsight job	n/a
PixInsight queue size	n/a
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Sh2-174 (LBN 598) Valentine Rose Nebula

Sh2-174 (LBN 598) Valentine Rose Nebula

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Sh2-174 (LBN 598) Valentine Rose Nebula

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