View Single Post
  #1  
Old 20-09-2019, 06:24 PM
John Hothersall's Avatar
John Hothersall
Registered User

John Hothersall is offline
 
Join Date: Apr 2007
Location: Thornlands, Brisbane.
Posts: 1,346
Uranus and Neptune 15.9.19

SPX350 F17.5, ASI290, Baader 610nm filter. 0.1"/pixel.

The night showed some good seeing but variable which as it progressed became less variable.

With Uranus I used 12min captures at 75fps and 0.1"/Pixel gain 590, the moons are very faint but the brightest Titania was seen with the last 4 captures which were the best showing bright north area detail on the 3.67" disc - derotation of 4 sets. Uranus only reaches 49.5 degrees. I took some rgb but it was too green so I changed it to a more pleasing cyan colour. The moons are clearly visible showing the good seeing, next time I may try 0.15"/pixel to see if I can get Miranda which was too faint. I included some raw frames to show you seeing was not too bad. This is the first time I have got any detail on Uranus because I did not have the 610nm filter which works really well.

Neptune gave me 6 good 10 min sets but the derotation showed no white cloud detail. Over 2hrs 10min I got some Triton motion after Dennis suggested motion could be seen. I used 25fps full gain 0.1"/pixel. I also got some colour. Autostakkert had problems stacking this small planet so I used Registax, don't know what I did wrong.

Regards, John.
Attached Thumbnails
Click for full-size image (uranus-610nm rgb-cs3.png)
26.3 KB219 views
Click for full-size image (uranus 610nm.png)
6.2 KB176 views
Click for full-size image (uranus moons annotated.png)
181.8 KB173 views
Click for full-size image (uranus  raw single frame.png)
106.4 KB155 views
Click for full-size image (neptune 610 rgb-cs3.png)
38.3 KB190 views
Click for full-size image (neptune 610.png)
3.7 KB153 views
Click for full-size image (GIF triton motion.gif)
42.2 KB144 views
Reply With Quote