#1  
Old 22-09-2020, 10:16 AM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 1,358
Mars 21/9/20

Hi All.

Did some Martian imaging on Monday morning , after watching the final leg of the Tour de France . Seeing was probably Pickering 4 or 5 at best.

NG 127 Triplet, 3X ED Barlow, ZWO 290mc, EQ6, PIPP & Registax. Best 1500 of 10,000 fr @ 190 Fr/sec. Re-sized 120%.

Thanks for looking.
Attached Thumbnails
Click for full-size image (20200921 02_11_35_pipp.jpg)
8.1 KB66 views
Click for full-size image (20200921 02_27_46_pipp.jpg)
8.3 KB49 views
Click for full-size image (20200921 02_59_04_pipp.jpg)
7.8 KB47 views
Click for full-size image (20200921 03_32_18_pipp.jpg)
7.7 KB48 views
Reply With Quote
  #2  
Old 22-09-2020, 10:20 AM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Hinchinbrook
Posts: 19,643
Looks great Jeff. Surprised you got so much details. The seeing has been horrid here lately.
Reply With Quote
  #3  
Old 22-09-2020, 08:20 PM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 1,358
Thanks Marc , yes the seeing has been terrible down here all winter and early spring. I was pleasantly surprised to get some useable images from the mornings run.
I would like to say that your Mars gif from a few days ago is top notch, with much more detail than I've achieved.
Reply With Quote
  #4  
Old 22-09-2020, 08:26 PM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Hinchinbrook
Posts: 19,643
Quote:
Originally Posted by Saturnine View Post
Thanks Marc , yes the seeing has been terrible down here all winter and early spring. I was pleasantly surprised to get some useable images from the mornings run.
I would like to say that your Mars gif from a few days ago is top notch, with much more detail than I've achieved.
Yeah but I was shooting in IR. That cuts through bad seeing a lot more. I did some color with an OSC the other night and that was so bad. I have a filter wheel now. Fitted it tonight. I want to go out and do some more but the jetstream is ~100kt. Might as well go to bed.
Reply With Quote
  #5  
Old 22-09-2020, 08:45 PM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 1,358
Quote:
Originally Posted by multiweb View Post
Yeah but I was shooting in IR. That cuts through bad seeing a lot more. I did some color with an OSC the other night and that was so bad. I have a filter wheel now. Fitted it tonight. I want to go out and do some more but the jetstream is ~100kt. Might as well go to bed.
I was aware that your images were with an IR Pass filter and what the filter is capable of with cutting through the bad seeing, plenty of examples on ALPO of Mars especially. Almost makes me want to go mono and IR,RGB but a bit late for this planet season now, not to mention it would put a dent in my pension payment.
Reply With Quote
  #6  
Old 22-09-2020, 09:41 PM
Startrek (Martin)
Registered User

Startrek is offline
 
Join Date: Dec 2017
Location: Sydney
Posts: 2,571
Jeff
Very good Martian images
Itís a difficult planet to image due to its size , the low surface brightness and colour
Great job, well done !!
Martin
Reply With Quote
  #7  
Old 23-09-2020, 09:51 AM
Saturnine (Jeff)
Registered User

Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 1,358
Quote:
Originally Posted by Startrek View Post
Jeff
Very good Martian images
Itís a difficult planet to image due to its size , the low surface brightness and colour
Great job, well done !!
Martin
Thanks Martin
I think I may have to correct you , Mars has a very high surface brightness, hence why a small object in apparent size is so bright. Think of a planetary nebula of similar apparent size, like NGC 7009, the Saturn Nebula, at 20" X 15" is only mag 8 and for a planetary has a reasonably high surface brightness. That is also why it is possible to achieve high frame rates when imaging Mars, because it is so bright, looking at the planet for too long in an eyepiece with a larger aperture doesn't do your dark adaption any favours.

Cheers.
Reply With Quote
  #8  
Old 23-09-2020, 02:37 PM
Startrek (Martin)
Registered User

Startrek is offline
 
Join Date: Dec 2017
Location: Sydney
Posts: 2,571
Quote:
Originally Posted by Saturnine View Post
Thanks Martin
I think I may have to correct you , Mars has a very high surface brightness, hence why a small object in apparent size is so bright. Think of a planetary nebula of similar apparent size, like NGC 7009, the Saturn Nebula, at 20" X 15" is only mag 8 and for a planetary has a reasonably high surface brightness. That is also why it is possible to achieve high frame rates when imaging Mars, because it is so bright, looking at the planet for too long in an eyepiece with a larger aperture doesn't do your dark adaption any favours.

Cheers.
Jeff
Thanks for the correction
I would have assumed that the red / orange colour of Mars would have a lower rendering index on the light spectrum than say the blues to yellows to whites

Iím probably using my commercial lighting background as a rule of thumb which is a no no . Artificial lighting behaves totally different than celestial light

Cheers
Reply With Quote
  #9  
Old 28-09-2020, 11:23 PM
LostInSp_ce's Avatar
LostInSp_ce
Unregistered User

LostInSp_ce is offline
 
Join Date: Mar 2017
Posts: 726
Good to see another little scope in action. Well done!
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 01:40 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
NexDome Observatories
Advertisement
Limpet Controller
Advertisement
Testar
Advertisement
Bintel
Advertisement
Astronomy and Electronics Centre
Advertisement