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Neptune and Triton

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#1 Quopaz

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Posted 31 July 2021 - 12:40 AM

Seeing wasn't good enough to get anything decent out of Saturn last night. I tried but it was bad.
Didn't even bother trying Jupiter.
So while I was set up I had a practice run on Neptune.
Did a 2 star alignment, then told it to go to Jupiter and Saturn. Both were a little high in the finderscope,
so I went to Neptune and looked in that same high area. There were 2 candidates in that area, the first one was a star
but I was pretty sure the second one was Neptune. It was very faint in the 9x50, I but I could just see it even with
a fairly bright sky from the half moon. On screen I could tell it wasn't a star.
Wasn't sure what settings to use, so I started with Uranus settings from last year and increased the exposure.
Didn't end up with a lot of frames to stack but it was good to see Triton emerge when I stretched the Histogram.
More of a practice session for when conditions are better.
nep 211b.png
Neptune_235211_lapl5_ap7 b.png
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#2 Tulloch

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Posted 31 July 2021 - 12:54 AM

Excellent job, well captured.

 

For Neptune, I use a gain of 500 and 50ms shutter speed, compared to my Uranus settings of gain 400/50ms. A bit of sharpening in Registax and you are there!


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#3 Quopaz

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Posted 31 July 2021 - 01:19 AM

Thanks, I might have to try those settings next time.
I did 3 videos and tried combinations of 478 gain/100 ms, 450/150 and 500/150.
How long can you capture for? I think I tried 5 and 10 minutes.

#4 Tulloch

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Posted 31 July 2021 - 01:58 AM

Umm, 5 mins I think. There’s not much detail there…

#5 Supernova74

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Posted 31 July 2021 - 03:35 AM

Well considering the distance doesn’t look to bad at all.



#6 Quopaz

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Posted 02 August 2021 - 09:51 PM

The practice session came in handy, as I was able to capture Neptune again a couple nights ago when the conditions were much better.
Andrew I used your settings of 500 gain, 50ms exposure and it seemed to work well. I tried both 5 minute and 10 minute videos.
It sure is hard to find, I can only just see it in the finderscope if I turn the illuminated reticle off and let my eyes adjust for a while.
Some results- Neptune at captured size with the same colour adjustments I would use for Saturn and Jupiter:
N111b.png
At captured size with increased blue (being colourblind doesn't help here again)
N111b2.png
At 200% captured size:
N111b2 - Copy.png
The stretched histogram (cropped) showing Triton:
Neptune_005111_lapl5_ap10 b - Copy - Copy.png
Triton overlaid onto Neptune at captured size:
NepTrit111.png
Finally Triton overlaid onto Neptune at 200% captured size:
NepTrit111 -200%.png
Open to suggestions on how to improve and also what the colour looks like to people with normal colour vision.
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#7 Tulloch

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Posted 02 August 2021 - 10:28 PM

Looks good there, however I think you might be oversharpening a bit as the center of the planet looks a bit overexposed? Maybe a little less sharpening and bit more black level control would get you a nice disc?

 

Andrew


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#8 Quopaz

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Posted 02 August 2021 - 10:31 PM

Thanks, I'll try that.

#9 Quopaz

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Posted 03 August 2021 - 01:13 AM

With those changes:
Nep200b.png
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