#1  
Old 17-08-2020, 05:41 PM
Tulloch's Avatar
Tulloch (Andrew)
Registered User

Tulloch is offline
 
Join Date: Sep 2019
Location: Melbourne
Posts: 221
Spectra of the planets

Hi there, I was wondering if anyone has (or would) take a spectral measurement of the planets? I'm really interested in determining the "true" colour of the planets (others like Christophe Pellier have already measured Uranus and Neptune), but I'm interested in the spectra of Mars also.
https://www.cloudynights.com/topic/6...or-differences

Has anyone done this (or does anyone want to do this )? I only have a colour camera (ASI224MC) which I don't think is compatible with something like the SA100 or SA200, but maybe it is.

Thanks in advance,

Andrew
Reply With Quote
  #2  
Old 19-08-2020, 02:36 PM
Rob_K
Registered User

Rob_K is offline
 
Join Date: Oct 2006
Location: Bright, Vic, Australia
Posts: 2,121
Hi Andrew! Colour really only has meaning to us within the visible spectrum, outside that it's really just wavelength even though we invent descriptions like ultraviolet and infrared. So I don't think we can have any idea of the "true" colour of Uranus unless we have visual sensitivity to the whole range of the electromagnetic spectrum.

I had a bit of a play-around with the optical (visual) spectrum of Uranus once, obtained with a DSLR and an SA100 grating. I suspect that what I did was self-fulfilling in that the DSLR sensor 'assigns' a colour to Uranus, I then split that colour with a grating, and then put that back together to give a colour for Uranus! Anyway, it was a bit of fun!

Cheers -
Attached Thumbnails
Click for full-size image (Uranus spectrum, 29 Nov 2015 text sm.jpg)
183.7 KB15 views
Click for full-size image (Colour of Uranus text.jpg)
144.5 KB16 views
Reply With Quote
  #3  
Old 19-08-2020, 02:42 PM
Merlin66's Avatar
Merlin66 (Ken)
Spectroscopy Wizard

Merlin66 is offline
 
Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 7,795
Andrew,
Your camera would work with the grating.
Remember without a slit, the grating resolution is only as good as the size of the target, smaller the target, better the results i.e. stellar images.
Check out our webpage for details:
http://www.astronomicalspectroscopy.com/gratings.html
and
http://www.astronomicalspectroscopy.com/objects.html (down the page for Planets)
Reply With Quote
  #4  
Old 19-08-2020, 09:37 PM
Tulloch's Avatar
Tulloch (Andrew)
Registered User

Tulloch is offline
 
Join Date: Sep 2019
Location: Melbourne
Posts: 221
Thanks for that, I’ll certainly look closer ...
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 08:09 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Testar
Advertisement
Lunatico Astronomical
Advertisement
Bintel
Advertisement
Astromechanics
Advertisement
Astronomy and Electronics Centre
Advertisement