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IC1795 Emission Nebula, niteman1946

IC1795 Emission Nebula

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IC1795 Emission Nebula, niteman1946

IC1795 Emission Nebula

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Acquisition details

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Description

IC 1795 is an emission nebula located about 6,000 light-years away in the constellation Cassiopeia . It covers a field of about 20 arc minutes (approximately 70 light-years). Near the Perseus double cluster and nebula Heart, at about 6000 light years from us, this complex extends through the Perseus arm of our Galaxy, the Milky Way. It is easy to see and is located in a rich environment with IC1805 and IC1848, and many open clusters. (Source Wikipedia fr).

IC1795 is nearby to NGC896 (both directly connected), with NGC 896 as one of the brightest nebula condensations of the region. The dominant central star of IC 1795 is a blue dwarf on the main sequence. In addition there are three other stars of class O and B with ages between 3 and 5 million years. This being an age intermediate to the 6 to 20 million years of the shell structure that encloses the complex. The region is one of the sites most studied (besides Orion) for the formation of massive stars. This area is more dense and rich in H II. It is home to, and hides, a group of young blue stars, with their radiation ionizing the residual gas clouds. (Source Wikipedia it).

This rendition was inspired by Emilio's version on Forum Astrofili Italiani in late November. The image was captured with the Meade 12"LX200, using the Atik 383L+ mono at F6.56. Astronomik's 12nm Halpha, OIII and SII narrow band filters were used. Although the LX200's field of vision is too narrow to capture all of IC1795, there is still quite a bit of information in this image.

All subs were taken at 1x1 bin, -10C, and 10 minutes each.

Ha : 23 subs (3.83 hr) on Dec 10th.

O3 : 24 subs (4.00 hr) on Dec 15th.

S2 : 24 subs (4.00 hr) on Dec 16th.

Processing was done with PixInsight, following (for the most part) kayronjm's tutorial of Feb. 24th. Only Ha was used to develop the Luminance image. Ha, O3 and S2 were collected for the color mix. See below formula.

First Image: HST Palette

R = S2, G = Ha, B = O3

Second Image: Mark's Palette

R = 0.5O3+0.5Ha, G = 0.85S2+0.15O3, B = S2

Third (final) Image: Juan's Palette

R = 0.5S2+0.5Ha, G = 0.85O3+0.15Ha, B = O3

Edit 12/18/13:

Fourth (final, final) Image: Mark's 2nd Palette

R = S2, G = 0.25Ha+0.75O3, B = O3

This does bring a little more color variation to the image.

North is up. This is a very slight crop top, bottom and sides. As such, quite a bit of vignetting shows up in the corners, especially noticeable since I pushed the luminance and chrominance.

Comments

Revisions

  • Final
    IC1795 Emission Nebula, niteman1946
    Original
  • IC1795 Emission Nebula, niteman1946
    B
  • IC1795 Emission Nebula, niteman1946
    C
  • IC1795 Emission Nebula, niteman1946
    D

Histogram

IC1795 Emission Nebula, niteman1946