Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  21 eta Cyg  ·  B144  ·  B146  ·  Sh2-101  ·  The star ηCyg
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SH2-101 Tulip Nebula Finished, Kurt Zeppetello
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SH2-101 Tulip Nebula Finished

Getting plate-solving status, please wait...
SH2-101 Tulip Nebula Finished, Kurt Zeppetello
Powered byPixInsight

SH2-101 Tulip Nebula Finished

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Acquisition details

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Description

I finished this image of the Tulip Nebula (SH2-101) by adding the RGB (color) over the past few nights. The nebula is a HII region about 6,000 light years away in Cygnus. It looks really cool now that it is done but the individual frames looked like nothing. The Ha data really made the tulip and the rest of the nebulosity stand out. Although I took the color frames without any filter, I would recommend using a UHF filter if an Ha filter was not available. For anyone who doubts the usefulness of adding Ha-images to color images, I did a comparison of what I did to combine the images. Basically I followed Trevor Jones (Astrobackyard.com) directions for adding Ha-data to color data.

1) The Ha image (Ha) was created first over three nights when the moon was full or near full. I followed my normal procedures but stacked the frames using super pixel mode.

2) The color image (RGB) was done normally as well however at the recommendation of Shannon Calvert who was also imaging at the site, I switched to 800 ISO in order to lesson the noise which my old workhorse T3i seems to produce.

3) The Ha-image (HaR) was added to the the red channel of the color image to provide an initial boost.

4) The Final Image (HaRRGB) was produced when the Ha-image was added to the Enhanced image using the luminosity combining method.

Addendum:

So I decided to redu my last object before changing over to PI. I never was truly happy background so though I would give PI a try. I was unable to do my new normal HaRRGB method because there was a problem with the Ha stacked file, it had this horizontal -vertical pattern to it so I had to get rid of most of it with curve stretching. It was not in the one I did four months ago with DSS so I think the problem is one set of flats is corrupt. This also prevented the additional nebulosity from being visible. If I get some more free time I will play with this again. I think the star field looks really cool so I only did a 33% star reduction with morphological trans. I am in the middle of trying to finish Andromeda but I have been very sick the last week and the weather has not been ideal either. Also, I switched the orientation and did not us PS at all.

Comments

Revisions

  • SH2-101 Tulip Nebula Finished, Kurt Zeppetello
    Original
  • SH2-101 Tulip Nebula Finished, Kurt Zeppetello
    B
  • SH2-101 Tulip Nebula Finished, Kurt Zeppetello
    C
  • Final
    SH2-101 Tulip Nebula Finished, Kurt Zeppetello
    D

B

Description: The Process

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C

Description: New Try only using PI: Half successful/half not - read the addendum.

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D

Description: Sorry I posted the same thing again.

Uploaded: ...

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Sky plot

Histogram

SH2-101 Tulip Nebula Finished, Kurt Zeppetello

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