Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Saturn and 9 moons - 19 Oct 2020

  • Please log in to reply
3 replies to this topic

#1 Tulloch

Tulloch

    Soyuz

  • *****
  • topic starter
  • Posts: 3,837
  • Joined: 02 Mar 2019
  • Loc: Melbourne, Australia

Posted 20 October 2020 - 09:40 PM

I got inspired to try to image Saturn and some of its dimmer moons, and with our moon at the start of its cycle and Phoebe now close to Saturn, I thought I'd have a crack. As it turned out, capturing the moons wasn't that difficult, the real time waster was confirming their locations. SkySafari and Stellarium show Phoebe in the wrong position, WinJupos doesn't show it at all, and eventually I remembered about the NASA Planet Viewer website which James7ca put me onto some time ago, giving accurate locations of the moons of the outer planets.

https://pds-rings.seti.org/tools/

 

I took two images, one using my normal settings (C9.25" SCT, 2.5x TV PowerMate on my Evo mount at 100 fps), the other at 1 fps but replacing the PowerMate with my Meade f/6.3 focal reducer to increase the FOV and let more light in. The first image was for Saturn and the close moons, the second was for Iapetus, Hyperion and Phoebe.

 

After stacking, stretching and aligning the two images I ended up with these. The first is just the planet which came out OK, the second is the cleaned up planet + moons image.

 

Also here are some stretched frames with the PDS data superimposed on it to show the moon locations. What started out as a bit of fun turned into a real slog, I don't think I need to do this again smile.gif.

 

Andrew

Attached Thumbnails

  • 2020-10-19-0933_9-L-Sat_AS_F5000_l6_ap51_Driz30 Sat925LitLes r1g1b11 ps1sm150.png
  • Composite 9 moons labelled small100.png
  • Saturn Viewer 2020-10-19-0933_9-L-Sat_AS3Derotated_AS_F7500_l6_ap100_Driz30 ps1sm50 cropped.jpg

Edited by Tulloch, 20 October 2020 - 09:43 PM.

  • cometcatcher, otocycle, Magellanico and 21 others like this

#2 Tulloch

Tulloch

    Soyuz

  • *****
  • topic starter
  • Posts: 3,837
  • Joined: 02 Mar 2019
  • Loc: Melbourne, Australia

Posted 20 October 2020 - 09:41 PM

... and the wide view with scale.

 

Attached Thumbnails

  • Saturn-composite-animate-sm.gif

  • Kenny V., Jim Waters, R Botero and 8 others like this

#3 cougarone

cougarone

    Vostok 1

  • -----
  • Posts: 173
  • Joined: 30 Jul 2010
  • Loc: Audobon and Paupack, PA

Posted 20 October 2020 - 10:10 PM

Fantastic !!



#4 sunnyday

sunnyday

    Voyager 1

  • *****
  • Posts: 11,276
  • Joined: 23 Sep 2019
  • Loc: the Canadian nebula .

Posted 20 October 2020 - 10:12 PM

great work , superb images , thanks .




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics