NGC 1555 (Hind's Variable Nebula)

NGC 1555 (also catalogued as Ced 32B, DG 31, Bernes 84, Sh 2-238, Magakian 66, VdB 28), sometimes called Hind's Variable Nebula, is a variable nebula, illuminated by the star T Tauri, prototype of the class of T Tauri variable stars. It is a Herbig–Haro object. The edge of a molecular cloud, the star and the nebula vary significantly in brightness, but not at the same time, which adds some unanswered questions to the astronomers.The surroundings of Hind's nebula are embedded in layers of obscuring dust and gas. The distance to this area is estimated to be 400 light-years. Despite NGC 1555 is often imaged, there are only few images showing wider FOV of this region. Initially I thought that the zebra-like pattern is due to some processing artefacts, but this image of Thomas V. Davis convinced me that they are real. The image was taken remotely from the remote controlled IRIDA Observatory .


Technical Details:

Optics: ASA N12 Astrograph at F/3.6
Mount: ASA DDM 85
Camera: SBIG STL-11000M
Filters: Astronomik LRGB filter set
Dates/Times: 10, 11, 12 November 2012
Location: Rozhen, IRIDA Remote Observatory
Exposure Details: L = 390 min, R = 120 min. G = 140 min., B = 130 min.
Subexposures: 10 minutes
Acquisition: CCD Soft
Processing: PixInsight, Photoshop CS

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