Reflectance Spectroscopy with a Star Analyzer

[chiltonstar]

An obvious thought; has anyone tried reflectance spectroscopy with a Star Analyzer, for example of the "coloured" areas of the Moon?

Does the SA work with something that isn't a point source like a star?

Chris

[andrew s]

Chris, the SA only works with point source or objects like the ring nebula. The spectra of an extended source will overlap and wash each other out.

Andrew

[Merlin66]

I think this sort of work is beyond amateur slit spectroscopes ( I may be proved wrong!) but it is being done using NASA data. There a lot of results and info in some of the back issues of the Selentology emag.

See below:

Released Selenology Today # 21, the journal of the GLR group.

This looks like another good issue! The Journal of lunar studies is released at

SELENOLOGY TODAY

You are welcome!

Raffaello Lena

editor of Selenology Today

GLR group

[jsandse]

I don't think this work is outside the scope of amateurs...

There is a manual in selentology mag for spectral work

http://digidownload.libero.it/glrgroup/selenologytoday19.pdf

They do work using 20 filters with a C9.25 and use spectra from a number of space missions freely available on line to do their spectral analysis of parts of the moon

I can't see why amateurs with slit spectroscopes can't do high or low resolution work on different parts of the moon.

cheers

John

[Merlin66]

Hmmm

Sounds like another "project" to add to the ever growing list...

we need more amateurs to help!!!

[chiltonstar]

Many thanks; I agree a slit spectrometer should work. Using filters is an interesting idea - the three RGB channels from a DSLR file should be similar in principle to a simple three colour filter system, I suppose, and might provide some objectivity to the description of colour in Moon images, or the yellowish bands on Saturn. (I had a quick look using the RGB values at obviously brown and blue areas of a moon image and you can in fact see very clear differences in the ratios).

Chris