Astronomy help please!?

[Dave Dubya]

Use Wien's Law: Temperature = Wien's constant / Wavelength

You'll need to find the value of the constant and remember to convert the wavelength into metres.

[Pete Presland]

perhaps these will help

Wien's displacement law - Wikipedia, the free encyclopedia

CalcTool: Black body emission max calculator

[Tinker1947]

So how would a Astronomer measure the wavelength of a Star....

[cantab]

While in principle you could measure the intensity of light at different frequencies, and thus determine the peak emission, in practice I don't think that's how it's done. There are I believe two ways to find the surface temperature of a star. One is the spectral classification method, by examining the lines the star's spectrum. That was being done before we even realised the spectral types related to temperature. The other method is to use the colour indices - the difference in brightness of the star as viewed through different colour filters, usually the B-V (blue vs green) or U-B (ultraviolet vs blue) indices.

I suspect both those methods might be within reach of amateurs. I know some people have got into spectroscopy, and imaging with U, B, and V filters should be no harder than any other sort of imaging.

[ronin]

Anything happened to this post?

It seems to start with one of the oringinal answers to a question that I recall reading, but now I can see no original question.

Has it managed to get deleted by mistake?

The first post I see is:

Use Weins law......

[Dave Dubya]

Yeah, it now looks like I started a thread just to quote Wien's Law.

Which I wouldn't do....at least not at 5am.

[Starwiz]

Oops - entered in error - delete this post