Simeis 57 - DWB 111 - DWB 119 (Francis Moreau)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: HD191354 · HD191546 · HD191810 · HD191854 · HD191896 · HD191943 · HD192037 · HD192121 · HD192162 · HD192202 · HD192242 · HD192279 · HD192339 · HD192340 · HD192402 · HD192496 · HD192535 · HD192555 · HD192582 · HD192583 · HD192601 · HD192602 · HD192731 · HD192867 · HD192868 · HD192911 · HD193217 · HD193610 · HD193632 · HD193793 · And 7 more.

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Simeis 57 - DWB 111 - DWB 119

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Simeis 57 - DWB 111 - DWB 119

La nébuleuse de l'hélice Simeis 57 (DWB 111 & DWB 119) a été cataloguée dans les années 1950 par les astronomes de l'Observatoire de Simeiz (Ukraine) comme le 57ème objet d'un catalogue de 306 régions HII.

La nébuleuse de l'hélice est souvent appelée à tort DWB 111, mais DWB 111 identifie le bras sud de l'hélice, tandis que le bras nord est DWB 119.

La nébuleuse de l'Hélice se trouve près de gamma du Cygne au nord-est. Comme beaucoup de nébuleuses en émission dans le Cygne, l'Hélice fait partie du nuage moléculaire géant Cygnus X, à environ 4600 années-lumière du système solaire.

Malheureusement, nous savons très peu de choses sur la nébuleuse de l'hélice, même sa distance est encore indéterminée. Elle émet principalement dans la raie alpha de l'hydrogène, tout en étant beaucoup plus faible à d'autres longueurs d'onde. Les étoiles ou autres sources responsables de l'ionisation du gaz n'ont pas encore été identifiées. La masse du nuage est estimée à moins de 50 masses solaires.

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Status	Advanced success
Started	...
Astrometry.net job	7957185
PixInsight job	X0T2BIBWIA9WK11NFCNVPSKVPXR6MD95
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h15m40s.14
RA (top/left)	20h24m00s.21
RA (top/right)	20h11m51s.66
RA (bottom/right)	20h07m21s.32
RA (bottom/left)	20h19m18s.34

Dec (center)	+43°48′30″.10
Dec (top/left)	+43°52′00″.9
Dec (top/right)	+45°09′01″.9
Dec (bottom/right)	+43°42′45″.5
Dec (bottom/left)	+42°27′32″.8

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Simeis 57 - DWB 111 - DWB 119

Simeis 57 - DWB 111 - DWB 119

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Simeis 57 - DWB 111 - DWB 119

Simeis 57 - DWB 111 - DWB 119

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