The Oxygen in Helix Nebula (APOD)

Featured in APOD.

This is a narrowband bicolor image (HOO), done with data accumulated in the last three years (a total of 90 hours!). I wanted to try a different processing that would emphasize the rayed structures in the OIII signal, without washing out the cometary knots at the core. All the data was acquired with an AP 6.6" apo refractor (f7.2), and an Apogee U8300 (30% of the data), combined with a QHY600.

For a high resolution version click here

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  • RCD on 2021-Oct-14 04:09:34 RCD said

    Amazing image! Quite a long project! What type of telescope did you use?

  • Bruce on 2021-Oct-14 12:03:26 Bruce said

    @RCD: The caption says the image captured with an Astro Physics 6.6" apochromatic refractor with focal ratio 7.2.

  • Bruce on 2021-Oct-14 12:05:09 Bruce said

    To Ignatio - congratulations on having this image selected for NASA's Astronomy Picture of the Day! Well done!