Celestial hemisphere:  Northern  ·  Constellation: Vulpecula (Vul)  ·  Contains:  10 Vul  ·  HD185781  ·  HD185858  ·  HD185915  ·  HD185957  ·  HD186100  ·  HD186310  ·  HD186379  ·  HD186533  ·  HD186841  ·  HD186930  ·  HD186998  ·  HD187193  ·  HD187238  ·  HD187299  ·  HD187343  ·  HD338639  ·  HD338642  ·  HD338650  ·  HD338731  ·  HD338733  ·  HD338734  ·  HD338737  ·  HD338740  ·  HD338743  ·  HD338744  ·  HD338748  ·  HD338749  ·  HD338752  ·  HD338753  ·  And 223 more.
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The three faces of Sh2-86, Sh2-87 and Sh2-88, Göran Nilsson
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The three faces of Sh2-86, Sh2-87 and Sh2-88

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The three faces of Sh2-86, Sh2-87 and Sh2-88, Göran Nilsson
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The three faces of Sh2-86, Sh2-87 and Sh2-88

Equipment

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Acquisition details

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Description

While aiming at this area in Vulpecula I had my dual-RASA8 rig acquiring RGB (no filter) on one scope and HaOiii (NBZ filter) on the other and then processing it with and without stars (using Star XTerminator). The differences were striking.

Image A shows what it looks like in RGB, with an overwhelming golden star field and with the HA emitting nebulae quite obscured.

Image B shows the starless version of the HaOiii image taken with the IDAS NBZ filter, revealing that behind the stars is a thick mesh of dark nebulosity apparently covering what could be a wide reaching area of Ha emitting nebulae.

In Image C, I combined 75% of the HaOiii data with 25% of the RGB data and added the RGB stars at a suppressed level to still show what was lurking behind. The patch of blue nebulosity at the very left edge with a striking blue star in the centre (if you zoom in) is the planetary nebula LAN 21

I find it quite striking how different celestial objects look when aquired and processed in different ways.

Comments

Revisions

  • The three faces of Sh2-86, Sh2-87 and Sh2-88, Göran Nilsson
    Original
  • The three faces of Sh2-86, Sh2-87 and Sh2-88, Göran Nilsson
    B
  • The three faces of Sh2-86, Sh2-87 and Sh2-88, Göran Nilsson
    C
  • Final
    The three faces of Sh2-86, Sh2-87 and Sh2-88, Göran Nilsson
    D

B

Description: Starless HaOiii image, see description

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C

Description: Final HaOiiiRGB image

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D

Description: Adjusted with Camera Raw

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Sky plot

Sky plot

Histogram

The three faces of Sh2-86, Sh2-87 and Sh2-88, Göran Nilsson