#1  
Old 19-10-2020, 04:42 PM
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LostInSp_ce
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Full Disco Mars

It's been a year of planets and this is most likely to be the last. Another quickie captured on the 11/10/2020 just prior to opposition. Processed from the first of two, 2 minute sets for the night.

Acquisition:
LRGB = 8000 (total stack)
Scope: 130mm APO
Mount: NEQ6
Camera: ASI 290MM
Accessory: 2x Barlow
Processing: AutoStakkert, Registax, GIMP (scaled up approx 200%)
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  #2  
Old 19-10-2020, 06:41 PM
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wow amazing amount of detail for a 5in scope! well done.
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Old 20-10-2020, 11:36 AM
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Thanks Robert. The weather data was spot on so I had a nice little window of opportunity. I was observing that night/morning and the seeing was great.
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Old 20-10-2020, 11:50 AM
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PKay (Peter)
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Really good LIS.

In all my years, never managed more than a fuzzy blob.

You must know what you are doing!
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Old 20-10-2020, 03:13 PM
Startrek (Martin)
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LIS

That's a great image of the Red planet,plenty of surface detail

Such a difficult planetary target

Well done !!


Looking at your set up -

130mm APO focal length 910mm
Focal length f7
2 x Barlow used

So you were imaging that night at f14

Camera pixel size 2.9uM


General rule of thumb for Planetary Imaging

Bad seeing 3.5 x pixel size ( focal ratio f10 )

Average seeing 5 x pixel size ( focal ratio f14.5 ) *****

Good seeing 7 x pixel size ( focal ratio f20 )


Any idea what the seeing was like ?
Was Mars bouncing around or fairly stable during your sampling ?
Just curious



Thanks



Martin
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Old 20-10-2020, 04:36 PM
etill (Elliot)
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That's awesome, I did 10,000 frames several times over near the same time with an IMX290 (not the zwo though) and stacked the best 10% and it's not even close. I used my 200mm F/4 with a 5 x ES focal extender so probably a little too far.

When you say LRGB, what filters are you using and how are you capturing?
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Old 20-10-2020, 10:33 PM
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Quote:
Originally Posted by PKay View Post
Really good LIS.

In all my years, never managed more than a fuzzy blob.

You must know what you are doing!

Thanks Peter. Mars can be a challenging target. I wouldn't say that I know what I'm doing it's more luck than anything. It also helps when Mars has a close opposition cycle as it does now. Give us small aperture guys a chance to see some finer details. If there was ever a time to image Mars with a small scope it would be now, as it won't be this size again for another 15 years.

Quote:
Originally Posted by Startrek View Post
That's a great image of the Red planet,plenty of surface detail

Such a difficult planetary target

Well done !!


Looking at your set up -

130mm APO focal length 910mm
Focal length f7
2 x Barlow used

So you were imaging that night at f14

Camera pixel size 2.9uM


General rule of thumb for Planetary Imaging

Bad seeing 3.5 x pixel size ( focal ratio f10 )

Average seeing 5 x pixel size ( focal ratio f14.5 ) *****

Good seeing 7 x pixel size ( focal ratio f20 )


Any idea what the seeing was like ?
Was Mars bouncing around or fairly stable during your sampling ?
Just curious
Thanks Martin. I find the 290MM to be a perfect match for this scope. However, I want to pair it with a 2.5x Powermate as I feel it would be the absolute sweet spot in terms of quantity and quality. In theory 3x magnification would provide best results with a f/ratio of 21 but in reality those conditions are so rare that it's not worth chasing.

There was a little bouncing which can be seen in the frames below but still very good.

Quote:
Originally Posted by etill View Post
That's awesome, I did 10,000 frames several times over near the same time with an IMX290 (not the zwo though) and stacked the best 10% and it's not even close. I used my 200mm F/4 with a 5 x ES focal extender so probably a little too far.

When you say LRGB, what filters are you using and how are you capturing?
Thanks Elliot. Here's a pic to give you an idea of the session. I hope it explains things enough. Filters are ebay specials I got a couple of years ago. I can't remember the price but they were very cheap. $20 each or something crazy like that. Hopefully one day I can get a set of Chromas.
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Old 21-10-2020, 11:15 AM
Saturnine (Jeff)
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L.I.S.

That is a pretty good crack at Mars for that aperture, as you said , it is as good a time as we'll get for imaging Mars until 2033/35. Still have a few more weeks yet in this current opposition where it will be over 20" dia. so still time to gather more images.
Last opposition in 2018 I was using an 127mm Triplet and managed some reasonable results, once the dust storm had cleared.
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  #9  
Old 21-10-2020, 05:14 PM
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Anth10 (Anthony M)
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Fantastic effort on mighty Mars LIS!
Anth
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Old 22-10-2020, 11:42 AM
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Retrograde (Pete)
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Very good Mars with such a modest aperture scope.
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Old 23-10-2020, 07:13 PM
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Quote:
Originally Posted by Saturnine View Post
L.I.S.

That is a pretty good crack at Mars for that aperture, as you said , it is as good a time as we'll get for imaging Mars until 2033/35. Still have a few more weeks yet in this current opposition where it will be over 20" dia. so still time to gather more images.
Last opposition in 2018 I was using an 127mm Triplet and managed some reasonable results, once the dust storm had cleared.
Thanks Jeff. That's a fantastic grab for that year. I remember it well and that storm lasted for months. All I ever managed to observe and capture in 2018 was a red smudge. It was a shame because Mars was closer that year.

Quote:
Originally Posted by Anth10
Fantastic effort on mighty Mars LIS!
Thanks Anthony. I'm liking the look of your obs.

Quote:
Originally Posted by Retrograde
Very good Mars with such a modest aperture scope.
Thanks Pete. Until I can get the big Newt on to a mount it's all I've got to work with.
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