NGC 7538, NGC 7635 (Bubble nebula), M52 (Francis Moreau)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 4 Cas · Bubble Nebula · LBN 542 · LBN 543 · LBN 547 · LBN 548 · LBN 549 · LDN 1225 · LDN 1226 · LDN 1227 · LDN 1229 · LDN 1230 · LDN 1231 · LDN 1233 · M 52 · NGC 7538 · NGC 7635 · NGC 7654 · PK112-00.1 · Sh2-158 · Sh2-159 · Sh2-161 · Sh2-162 · The star 4 Cas

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NGC 7538, NGC 7635 (Bubble nebula), M52

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NGC 7538, NGC 7635 (Bubble nebula), M52

==================== FR ============================
NGC 7538 est une nébuleuse en émission petite mais très visible, située dans la constellation de Céphée.
Elle abrite la plus grande protoétoile découverte.

Une protoétoile est une grande masse qui se forme par la contraction des gaz d’un nuage moléculaire géant en milieu interstellaire principalement constitué d’hydrogène et d’hélium. La phase protostellaire est un stade précoce dans le processus de formation d’une étoile. Cette nébuleuse est donc une région de formation d’étoiles actives.

La nébuleuse NGC7538 est près de la nébuleuse de la Bulle (NGC7635) qui est une cible favorite pour les astrophotographes. C’est pour cette raison qu’elle est moins photographiée. Mais, c’est une très belle nébuleuse à observer.
==================== GB ============================
NGC 7538 is a small but highly visible emission nebula in the constellation Cepheus, home to the largest protostar ever discovered.

A protostar is a large mass formed by the contraction of gases from a giant molecular cloud in an interstellar medium made up mainly of hydrogen and helium. The protostellar phase is an early stage in the star formation process. This nebula is therefore a region of active star formation.

The NGC7538 nebula is close to the Bubble Nebula (NGC7635), which is a favourite target for astrophotographers. This is why it is photographed less often. But it is a very beautiful nebula to observe.
====================================================

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Status	Advanced success
Started	...
Astrometry.net job	8534997
PixInsight job	YO2AH1GE3ZNTV47ZYOZCZTEDJAL34C1J
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h18m23s.76
RA (top/left)	23h08m04s.76
RA (top/right)	23h28m38s.73
RA (bottom/right)	23h29m16s.31
RA (bottom/left)	23h07m34s.95

Dec (center)	+61°32′05″.1
Dec (top/left)	+60°41′06″.3
Dec (top/right)	+60°40′24″.1
Dec (bottom/right)	+62°19′59″.3
Dec (bottom/left)	+62°20′43″.2

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NGC 7538, NGC 7635 (Bubble nebula), M52

NGC 7538, NGC 7635 (Bubble nebula), M52

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NGC 7538, NGC 7635 (Bubble nebula), M52

NGC 7538, NGC 7635 (Bubble nebula), M52

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