- This topic has 2 replies, 1 voice, and was last updated 2 years, 8 months ago by
.
-
Posts
-
While JWST is tuning up its instruments I thought I would use it as target practice for spectroscopy of moving faint targets using the ALPY200. The colour? It seems to be reddish with a blue tinge and a lack of green, presumably dominated by the material used for the sun shield
https://britastro.org/observations/userimg/20220327_125655_18620527f18f.pngCheers
RobinThe correct link to the observation page
https://britastro.org/observations/observation.php?id=20220327_125654_228ed4b0a22ce097(Tried to edit the post but can’t find an edit option)
Robin
The NASA page on the JWST sun shield mentions a “pink” colour due to the coatings
https://webb.nasa.gov/content/about/innovations/coating.html
This is consistent with the reflectance spectrum and is similar to the pink colour seen reflected from the new Baader Bessel filters which use dielectric coatings to reflect all wavelengths except the green V passband, in place of the traditional coloured glass. Here is my new Baader filter on the left alongside my traditional coloured glass V filter.Attachments:
- You must be logged in to reply to this topic.