Go Back   IceInSpace > Images > Solar System

Reply
 
Thread Tools Rate Thread
  #1  
Old 07-06-2012, 08:34 AM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,819
Venus Transit - Hi res white light

Hello

Here’s a two-pane quickie from yesterday, showing some nice solar granulation and one of the sun spot groups. Venus is perched a little awkwardly in the corner due to the size limitation of the DMK31.

Taken at the prime focus of Tak Mewlon 180mm F12 with DMK31.

Cheers

Dennis
Attached Thumbnails
Click for full-size image (Venus Transit Mosaic Rev 01 1024.jpg)
185.1 KB148 views
Reply With Quote
  #2  
Old 07-06-2012, 08:43 AM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,799
Super sharp Dennis!
Reply With Quote
  #3  
Old 07-06-2012, 08:51 AM
SkyViking's Avatar
SkyViking (Rolf)
Registered User

SkyViking is offline
 
Join Date: Aug 2009
Location: Waitakere Ranges, New Zealand
Posts: 2,260
That's incredible, what a great shot Dennis! I think you can even see the atmosphere of Venus, it's edge is more soft than the finest detail in the sunspots.
Did you get many images?
Reply With Quote
  #4  
Old 07-06-2012, 08:54 AM
Shiraz's Avatar
Shiraz (Ray)
Registered User

Shiraz is offline
 
Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,918
really high res Dennis - excellent. regards Ray
Reply With Quote
  #5  
Old 07-06-2012, 09:01 AM
hotspur's Avatar
hotspur (Chris)
Registered User

hotspur is offline
 
Join Date: Apr 2009
Location: south east QLD,Australia
Posts: 2,869
lovely work Dennis,I think Rolf is right,it does almost seem one can see the atmosphere of Venus,even on a few of my images towards the end of the event,I can see what looks like it could be the atmosphere.
Reply With Quote
  #6  
Old 07-06-2012, 09:10 AM
Paul Haese's Avatar
Paul Haese
Registered User

Paul Haese is offline
 
Join Date: Jan 2009
Location: Adelaide
Posts: 9,991
Great stuff Dennis. I was waiting to see what you produced. I checked the list a few times yesterday looking for your name to see your results. I really love how sunspots seem to take on a different appearance in white light compared to Ha. The granulation you have is awesome to say the least. Nice work.
Reply With Quote
  #7  
Old 07-06-2012, 09:12 AM
Matt Wastell's Avatar
Matt Wastell (Matt)
Look up, look good!

Matt Wastell is offline
 
Join Date: Jul 2009
Location: Brisbane, Australia
Posts: 2,762
Great one!
Reply With Quote
  #8  
Old 07-06-2012, 10:22 AM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,819
Hi Guys

Thanks for the comments. The “false” atmosphere around Venus is an alignment, stacking and processing artefact. This is not readily discernible when looking at the finished photo, but when you see the “Live View” images you can see the dramatic effects of the Earth’s atmosphere producing a “boiling” effect around the limb of Venus.

Although I have tried to minimise this effect in the processing workflow, it is quite difficult to eliminate it completely.

I spent most of the day with the Vixen 4” refractor collecting whole of disc photos, as the seeing didn’t really support the longer focal length of the Mewlon. We also had family and neighbours around, so we made it more of a social occasion than a hard core recording event. I had a few issues with clouds, trees and roof tops blocking the views at the opening and closing stages of the event.

Here is a single frame to show the boiling limb of Venus.

Cheers

Dennis
Attached Thumbnails
Click for full-size image (Single Raw Frame Venus.jpg)
30.3 KB34 views
Reply With Quote
  #9  
Old 07-06-2012, 08:37 PM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,819
Here’s a composite image where I grossly over-exposed the Sun, in an attempt to tease out the full disc of Venus as it crossed the limb. I added the solar granulation from another image, to replace the featureless, white, blown-out solar disc due to gross over exposure.

Cheers

Dennis
Attached Thumbnails
Click for full-size image (Venus Transit M180 DMK31 PF 14-29-03 A Crop 1024.jpg)
169.4 KB35 views
Reply With Quote
  #10  
Old 07-06-2012, 08:49 PM
Matt Wastell's Avatar
Matt Wastell (Matt)
Look up, look good!

Matt Wastell is offline
 
Join Date: Jul 2009
Location: Brisbane, Australia
Posts: 2,762
That is cool!
Reply With Quote
  #11  
Old 07-06-2012, 10:13 PM
Derek Klepp's Avatar
Derek Klepp
Registered User

Derek Klepp is offline
 
Join Date: Nov 2008
Location: NE NSW
Posts: 2,469
Superb Dennis . The atmosphere was certainly on the boil in the arvo
Reply With Quote
  #12  
Old 07-06-2012, 11:15 PM
h0ughy's Avatar
h0ughy (David)
Moderator

h0ughy is offline
 
Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 33,428
awesome dennis
Reply With Quote
  #13  
Old 08-06-2012, 08:04 AM
venus's Avatar
venus (Lydia)
AstroNan

venus is offline
 
Join Date: Nov 2004
Location: Newcastle
Posts: 685
Cool images Dennis!
Reply With Quote
  #14  
Old 08-06-2012, 08:35 AM
asimov's Avatar
asimov (John)
Planet photographer

asimov is offline
 
Join Date: May 2005
Location: Bundaberg
Posts: 8,819
Lovely work Dennis! I can certainly confirm the iffy & boiling seeing north of Brissy.
Reply With Quote
  #15  
Old 08-06-2012, 09:56 AM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,819
Thanks guys, it certainly was an exciting event.

@John – in Brissie we appeared to be positioned towards the southern edge of the jet stream, whereas towards the north, the map was coloured with those horrible lime green/yellow contours that portend miserable seeing.

Cheers

Dennis
Reply With Quote
  #16  
Old 08-06-2012, 10:33 AM
Quark's Avatar
Quark (Trevor)
Registered User

Quark is offline
 
Join Date: Apr 2008
Location: Broken Hill NSW Australia
Posts: 4,109
Super resolution there Dennis, certainly a memorable day.

Regards
Trevor
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 03:11 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement