Secret Still Observatory

'Star, star teach me how to shine, shine'

NGC7822

The new wide field target for the current period of good weather is NGC7822 / SH2-171, an HII region in Cepheus.

Mark

1 minute read

    Integration time:
    * 165 x 120s (5h30m)

10th August 2022 Five and a half hours of data gathered last night. Compared to previous targets the nebulosity of NGC7822 is quite faint.

Mark

3 minute read

    Integration time (running total):
    * SII 25 x 300s (205m)
    * Ha 21 x 300s (175m)
    * OIII 23 x 300s (200m)
    * Total: 855m/14h15m
    
    Integration time target
    * Target: 20 hours
    * Progress: 71%

From latitude 52° North this target is at it optimum altitude now and will continue to be available for several hours per evening well into the darker nights of autumn.

Mark

2 minute read

7th July 2022 First test of the GHS (Generalised Hyperbolic Stretch) script in PixInsight which I found intuitive (for a PI script!) and mighty impressive in its results. Definitely one to keep using and get good at. This resulting image is a massive improvement on the same target photographed last year due to this and, mainly, the EQ6R Pro mounted on a pier.

Mark

1 minute read

2nd July 2022 I ran the 200PDS on the Cave Nebula in narrowband and the Askar on the Cygnius Loop in OSC. Amazingly my tweaks to the AZ-GTI mount seem to have made the guiding work and although the guiding standard deviation was horrible the result was very tight round stars on the Askar. The guiding on the Newtonian was awful too and I think that the extreme humidity was affecting the seeing quite badly.

Mark

1 minute read

While the M51 project still has plenty to do to complete, a new project was started - the Iris Nebula (NGC7023) in broadband. Around eight hours of integration time were logged on the 8th, 10th and 11th June and this will be augmented over the next few clear evenings. Unfortunately in summer in the UK we have only 3 hours of semi-darkness and no astronomical darkness whatsoever.

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