Go Back   IceInSpace > Images > Solar System

Reply
 
Thread Tools Rate Thread
  #1  
Old 29-09-2020, 06:55 PM
Stefan Buda
Registered User

Stefan Buda is offline
 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 820
First light with the ASI290MM

This is a red light image only as my tracking got interrupted halfway through the RGB set. I have a full set from later on, but the seeing deteriorated gradually and by the time I finished with Jupiter and Saturn and moved on to the Moon it was not worth persisting.
Scope was the old 405 D-K. I think this camera definitely has an edge over the ASI120MM that I've been using for a few years.
Attached Thumbnails
Click for full-size image (j2020-09-28-red_filtered.jpg)
37.3 KB229 views
Reply With Quote
  #2  
Old 29-09-2020, 07:32 PM
xa-coupe's Avatar
xa-coupe (Jeff)
Registered User

xa-coupe is offline
 
Join Date: Apr 2020
Location: Melbourne
Posts: 302
Nice, it'll be quite interesting to see what you get with a full set.
Reply With Quote
  #3  
Old 29-09-2020, 11:03 PM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 2,125
The image certainly shows that with the right conditions and that scope and camera combination that the results should be very interesting with the other channels added. At what focal length was the telescope operating at for that image.
Reply With Quote
  #4  
Old 30-09-2020, 08:35 AM
Stefan Buda
Registered User

Stefan Buda is offline
 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 820
Quote:
Originally Posted by Saturnine View Post
... At what focal length was the telescope operating at for that image.
At prime focus of 6500 (f/16). With the smaller pixels of the ASI290 I should be close to achieving full resolution without a focal extender.
Reply With Quote
  #5  
Old 30-09-2020, 08:48 AM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 22,060
That looks great Stefan. Incredible details.
Reply With Quote
  #6  
Old 30-09-2020, 09:01 AM
Tulloch's Avatar
Tulloch (Andrew)
Registered User

Tulloch is offline
 
Join Date: Sep 2019
Location: Melbourne
Posts: 488
Excellent image there, I've never seen Io as clear as that! Pity about the weather, that would have made an excellent colour image.

The 290 should be much better than the old 120 - lower noise, faster transfer speeds, and the fact you can capture at native f/16 is a bonus.
Reply With Quote
  #7  
Old 30-09-2020, 10:32 AM
Stefan Buda
Registered User

Stefan Buda is offline
 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 820
Thanks for the comments.

I processed the RGB set and unfortunately WinJupos can't derotate Io relative to the planet, so on a long RGB set such as this, the moon gets a bit smeared out. This was about a 10minute set.
Attached Thumbnails
Click for full-size image (j2020-09-28_10-05_RGB_sb.jpg)
91.9 KB168 views
Reply With Quote
  #8  
Old 30-09-2020, 01:03 PM
Peter Ward's Avatar
Peter Ward
Galaxy hitchhiking guide

Peter Ward is offline
 
Join Date: Dec 2007
Location: The Shire
Posts: 8,088
I've tinkered with planetary imaging on and off for many years but simply don't have the patience to wait for seeing to deliver even reasonable results...let alone what you have captured.

That's really impressive Stefan...certainly on par with the best examples elsewhere on the web.

Most excellent
Reply With Quote
  #9  
Old 30-09-2020, 08:54 PM
Stefan Buda
Registered User

Stefan Buda is offline
 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 820
Thanks Peter,
Yes, you need a lot of patience with planetary imaging. Sometimes you are on the brink of giving up and then suddenly the magic happens.The planets suddenly look sharp at 400x. That is when you plug in the camera and capture the good moments.

I think the ASI290 will be most useful for Saturn imaging where its extra sensitivity helps with the low surface brightness. This 8 minute RGB capture is also from the 28th.
Attached Thumbnails
Click for full-size image (Sat-2020-09-28_filtered.jpg)
37.1 KB160 views
Reply With Quote
  #10  
Old 30-09-2020, 09:02 PM
Atmos's Avatar
Atmos (Colin)
Ultimate Noob

Atmos is offline
 
Join Date: Aug 2011
Location: Melbourne
Posts: 6,980
Exceptional results Stefan. I have been considering getting a small colour planetary camera. From what I've read the ASI290 although being an older sensor is still arguably the best for non-IR planetary imaging. A definite improvement over the ASI120MM!
Reply With Quote
  #11  
Old 30-09-2020, 09:16 PM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 22,060
Quote:
Originally Posted by Stefan Buda View Post
IThis 8 minute RGB capture is also from the 28th.
Incredibly sharp and detailed. So did you run 3min RGB channels then derotate in WinJUPOS?
Reply With Quote
  #12  
Old 01-10-2020, 07:23 AM
Stefan Buda
Registered User

Stefan Buda is offline
 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 820
Quote:
Originally Posted by Atmos View Post
Exceptional results Stefan. I have been considering getting a small colour planetary camera. From what I've read the ASI290 although being an older sensor is still arguably the best for non-IR planetary imaging. A definite improvement over the ASI120MM!
Thanks Colin, just remember that you will need a Risley prism for atmospheric dispersion compensation if you go for the colour cam.

Quote:
Originally Posted by multiweb View Post
Incredibly sharp and detailed. So did you run 3min RGB channels then derotate in WinJUPOS?
Thanks Marc, I used my Jupiter setting of 45 sec recording and increased the exposure from 3ms to about 7ms, if I remember correctly. So I used 3 AVIs for each colour channel and derotated with WinJupos.
Reply With Quote
  #13  
Old 01-10-2020, 09:33 AM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 2,125
The RGB combinations for Jupiter and Saturn are simply excellent sharp detailed images. Certainly on a par with the best amateur images out there.
Look forward to seeing more of your efforts, could we have some Mars please as well.
Reply With Quote
  #14  
Old 01-10-2020, 04:41 PM
Tulloch's Avatar
Tulloch (Andrew)
Registered User

Tulloch is offline
 
Join Date: Sep 2019
Location: Melbourne
Posts: 488
Excellent Saturn, super crisp
Reply With Quote
  #15  
Old 01-10-2020, 07:04 PM
John K's Avatar
John K
Registered User

John K is offline
 
Join Date: Sep 2005
Location: Melbourne
Posts: 1,468
Nice going Stefan!

Can't wait to see your results on Mars.

John K.
Reply With Quote
  #16  
Old 01-10-2020, 07:14 PM
Stefan Buda
Registered User

Stefan Buda is offline
 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 820
Thanks guys, but as far as Mars goes, I don't get the seeing that allows good imaging at 40 degrees altitude, or maybe do but only two or three times a year. Besides I'm not as keen as I was 15 or 20 years ago when there were not too many planetary imagers. These days if I miss a martian storm, there will be plenty of other to catch it.
Reply With Quote
  #17  
Old 02-10-2020, 02:29 PM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 22,060
Quote:
Originally Posted by Stefan Buda View Post
Thanks Marc, I used my Jupiter setting of 45 sec recording and increased the exposure from 3ms to about 7ms, if I remember correctly. So I used 3 AVIs for each colour channel and derotated with WinJupos.
Cool. How many frames did you collect roughly for the time period in each channel? Also do you heep your histogram around 40/50% or more like 80/90%?
Reply With Quote
  #18  
Old 02-10-2020, 02:44 PM
Stefan Buda
Registered User

Stefan Buda is offline
 
Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 820
Quote:
Originally Posted by multiweb View Post
Cool. How many frames did you collect roughly for the time period in each channel? Also do you heep your histogram around 40/50% or more like 80/90%?
On Saturn I was running at about 120fps and that added up to over 5000 frames per AVI, but I only used 1200 from each.
I usually set the Log histogram cutoff at about 80% with the red filter and don't change it for the other filters.
Reply With Quote
  #19  
Old 02-10-2020, 02:47 PM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Sydney
Posts: 22,060
Quote:
Originally Posted by Stefan Buda View Post
On Saturn I was running at about 120fps and that added up to over 5000 frames per AVI, but I only used 1200 from each.
I usually set the Log histogram cutoff at about 80% with the red filter and don't change it for the other filters.
Good stuff. Thanks for the tips Stefan. I'll give it a go with tonight's run.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 02:52 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Testar
Advertisement