Keyhole (NGC 1999) (Simone Curzi)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: HD36920 · HD37001 · HD37091 · HD37131 · HD37210 · HD37236 · HD37304 · HD37357 · HD37372 · HD37373 · HD37390 · HD37399 · HD37412 · LBN 979 · LDN 1641 · NGC 1999

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Keyhole (NGC 1999)

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Keyhole (NGC 1999)

The ShaRA team, for the sixth project, landed in a much photographed area of the sky: Orion. Just south of the famous M42, there is a beautiful reflection nebula called NGC1999 The Keyhole.
The cosmic keyhole is a dust-filled nebula with a vast hole of empty space represented by a black patch of sky surrounded by a vast region of ionized hydrogen. It is a reflection nebula and shines with the light of the variable star V380 Orionis. This region is rich in Herbig-Haro objects. HH objects are transient nebulae with very weak emission, visible in star formation zones, formed thanks to ionized gas, expelled in the form of plasma jets from the poles of forming stars, which colliding at supersonic speeds with dense zones of gas and dust excite the atoms, making them luminous due to the triboluminescence effect. In the central part, close to the Hole there are the most luminous HH objects of the Sky: HH1 and HH2. We registered their enlargment respect the images taken in 2014 from HST.
This is my personal interpretation.
Cleary skies all!

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Status	Advanced success
Started	...
Astrometry.net job	9332887
PixInsight job	EEJILH580JJPVUU12HV6U1S3FE6XVMU7
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h36m22s.750
RA (top/left)	05h34m14s.607
RA (top/right)	05h34m10s.761
RA (bottom/right)	05h38m29s.945
RA (bottom/left)	05h38m33s.103

Dec (center)	-06°42′33″.65
Dec (top/left)	-06°10′02″.40
Dec (top/right)	-07°14′11″.96
Dec (bottom/right)	-07°15′05″.20
Dec (bottom/left)	-06°10′55″.37

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Keyhole (NGC 1999)

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Keyhole (NGC 1999)

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