Spectra of Moon, Vega and Jupiter taken with CCDSPEC on Sky Watcher Equinox Pro 80mm scope with Rob Leonard 11-12/5/2019

Rob kindly invited me around for an evening of observing. The Moon was half full and high and the humidity level high with mosture all over our telescopes but we still had a whale of a time – quite apt description as Rob found the Whale Galaxy for an amaxing view in his 14 inch Orion US scope – all star hopping – well done to him!!

I took some spectra of the Moon, Vega and Jupiter, using my CCDSPEC spectroscope on my Equinox – I know manual alt-az mount is not ideal but it is transportable so I used my Manfrotto mount tonight manually guided and star-hopping to targets – limiting me to bright targets. I would still like to take spectra of the Ring Nebula but I can’t see it in the CCDSPEC so I do need my EQ6 or HEQ5 mounts up and running to have a chance with that….

Particularly exciting tonight was our spectra of Jupiter, showing methane absorption lines – Jupiter’s spectrum is essentially that of reflected sunlight but its atmosphere does absorb light in the methane bands.

Rob and I were able to identify two of these bands in our spectrum this evening of the planet.


In spectra below my spectrum from tonight is in red and reference spectrum is in blue.

Moon – essentially this is a solar spectrum from reflected light:

Vega – Balmer series lines very obvious:

Jupiter – showing two methane absorption lines – one of main features that are different between Jupiter’s spectrum and the solar spectrum (In spectra below my spectrum from tonight is in red and reference spectrum is in blue).

2 Responses

    1. Thanks – you should have seen me in action – sometimes I could not see the slit and all I could do was move scope up and down and hope the start spent enough time in slit to get adequate exposure!!
      Got to do something about knowing where slit is…

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