Celestial hemisphere:  Southern  ·  Constellation: Ophiuchus (Oph)  ·  Contains:  Box Nebula  ·  NGC 6309  ·  PK009+14.1
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NGC 6309 Box Nebula ( NGC6309) NHO, Sergei
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NGC 6309 Box Nebula ( NGC6309) NHO

Revision title: With scale bar and 2.5m Nordic Optical Telescope image as reference

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NGC 6309 Box Nebula ( NGC6309) NHO, Sergei
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NGC 6309 Box Nebula ( NGC6309) NHO

Revision title: With scale bar and 2.5m Nordic Optical Telescope image as reference

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Description

Nii - Red
Ha - Green
Oiii - Blue

Note an interesting ring of Nii-rich nodes here assigned to the red channel.

This is an interesting nebula that has both a spherical shell and two sets of lobes offset at an angle, a bipolar structure. Its structure and composition has been studied in this paper:
https://arxiv.org/pdf/1410.7060.pdf

Image from this paper, taken with a 2.5m Nordic Optical Telescope, served as a reference image for my own capture and processing, since HST image of this nebula only captures is bright core but not the faint extended lobes. 

RGB stars from a separate broadband frame set.

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Revisions

    NGC 6309 Box Nebula ( NGC6309) NHO, Sergei
    Original
    NGC 6309 Box Nebula ( NGC6309) NHO, Sergei
    B
  • Final
    NGC 6309 Box Nebula ( NGC6309) NHO, Sergei
    C

B

Title: Inverted luminance to show bipolar lobes

Uploaded: ...

C

Title: With scale bar and 2.5m Nordic Optical Telescope image as reference

Uploaded: ...

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NGC 6309 Box Nebula ( NGC6309) NHO, Sergei