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clarkpm4242

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Posts posted by clarkpm4242

  1. This is a duplicate post from a competition thread.  I noted that @davew has done this and it enables replies to the post unlike the competition thread format.  We can discuss the merits of various chocolate snacks or even technical questions...  @James I note the intermittent lighthouse illumination didn't appear to impact your time lapse?

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    A ‘Sidereal Day’ is the time taken by the earth to rotate on its axis relative to the stars, and is almost four minutes shorter than the solar day because of the earth's orbital motion around the Sun.  A celestial object therefore reaches the same position in the night sky earlier each day.


    This can be seen in the attached composite of 3 images of the rising spring Milky Way in the south eastern sky in March, April and May. Each taken earlier and earlier in the night, yet the Scutum Star Cloud is in approximately the same position.  See images for date and times.

    (Times are a bit approximate as its not set correctly on my camera and there was the matter of GMT -> BST!  Have also attached a rotated version for clearer viewing..?)

     

    Cheers, Paul.

    Trio.jpg

    Trio rot.jpg

    • Like 2
  2. Earth’s Orbital Motion around the Sun

    A ‘Sidereal Day’ is the time taken by the earth to rotate on its axis relative to the stars, and is almost four minutes shorter than the solar day because of the earth's orbital motion around the Sun.  A celestial object therefore reaches the same position in the night sky earlier each day.


    This can be seen in the attached composite of 3 images of the rising spring Milky Way in the south eastern sky in March, April and May. Each taken earlier and earlier in the night, yet the Scutum Star Cloud is in approximately the same position.  See images for date and times.

    (Times are a bit approximate as its not set correctly on my camera and there was the matter of GMT -> BST!  Have also attached a rotated version for clearer viewing..?)

     

    Cheers, Paul.

    Trio.jpg

    Trio rot.jpg

    • Like 3
  3. I recommend  the RASC Finest NGC Objects as a next step deep sky from Messier.  It is based more on an object's attractiveness rather than a catalogue like the Herschel List which has many unfulfilling 'ticks'.  Being a Canadian list is great for northern latitudes.  I have trawled through the Herschel list once, however keep returning to the Finest NGC Objects.

    https://www.rasc.ca/finest-ngc-objects 

    Cheers

    Paul

    • Like 2
  4. ...features this water splash in the opening title sequence.  Maybe one for people of a certain age  :)

    About 00:30 UT last night.  Foreground 1 x 180s static, sky 7 x 120s tracked, 4 dark frames.  Sigma 24mm at f3.5, Canon 6D MkII at iso1600.  iOptron CEM 40 mount.

    Deep Sky Stacker and Photoshop.  Uncropped.  Sharper when clicked.

    Cheers

    Paul

     

    Watersplash 01 3 by 2.jpg

    • Like 9
  5. A set of 9 stone 'cairns' high above Kirkby Stephen, Cumbria.  On the Wainwright C2C walking route.

    Surprised at the background lighting, some all the way from Darlingtion and Teeside.

    Pano is 5 portrait frames, each 4 x 8s subs at f2 and iso3200.  Prep in Lightroom, stack in Sequator, composite in MS ICE, finish in Photoshop.

    Canon 6D MkII, Sigma 24mm ART, Nodal Ninja pano mount.

    Cheers Paul

     

     

     

     

    100 Nine Standards Rigg.jpg

    • Like 11
  6. My aim was to have an image that really had a strong presence of the galaxies and the IFN.  8 hours data in 3 min subs through RASA 8 and ASI2600MC Pro.  DSS & PS.

    Struggling with processing.  Colour is a bit meh, looks great in B&W, but it is a colour camera.  Photoshop manages the colour space differently to my laptop screen.  Think the summer will be spent learning how to make the most of the data with PS or an astro-specific digital darkroom.

    Cheer

    Paul

     

    M81 M2 IFN 10-3.jpg

     

    M81 M82 IFN plus 01.jpg

    • Like 9
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