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Spectrum of Neptune

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8 years 7 months ago #104517 by John D
Spectrum of Neptune was created by John D
Hi Everyone,

you may remember I recently bought an Rspec Star Analyser, so I decided to give it a try the other night on Neptune. Here are my results:





Taken with a Meade LXD75 6", Canon 100D and Star analyser 100l/mm
Methane absorption lines are clearly visible and possibly some Ammonia absorption lines.

John
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The following user(s) said Thank You: michael_murphy, johnomahony, scfahy

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8 years 7 months ago #104525 by michaeloconnell
Replied by michaeloconnell on topic Spectrum of Neptune
Looks good John.
Out of curiosity, did you calibrate it with the star Vega?

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8 years 7 months ago #104580 by John D
Replied by John D on topic Spectrum of Neptune
Thanks Michael, yes I did but I must say it was not very accurate as there were two absorption features where the H Balmer line (described in the calibration procedure) should have been, so I just picked the zero order star and one of the features, seemed to work out well as Methane definitely appears as absorption around 620 angstroms

John

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