| New spectra of Venus at 2023/04/17 by Christophe.P |
In 2020 I had used the crescent phase of the planet as a pseudo-slit to get some first spectra of the planet with the Star Analyzer. But now I made them with the Alpy600 and the results are much more resolved. The conclusions remained the same however. The UV absorber is well detected in UV, but is identified as active as well in the deep blue part of the spectrum, in coherence with details obtained with such filters as the W47. Although I did observed a solar-like star to correct the spectra (Lambda Aurigae), I have prefered to make profit of the solar spectrum contained inside the blue sky spectrum, which has been observed just before Venus at the same airmass. This allowed me, for pedagogical purposes, to correct the profile up to 360 nm, when the Alpy600 becomes completely blind.
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