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A colour photo of Mars from 1986

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About this observation
Observer
Richard McKim
Time of observation
31/12/2017 - 17:47
Equipment
1 metre Cassegrain telescope
Pic du Midi Observatory
Full details upon the image
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In 1986 I spent ten nights at the Pic du Midi Observatory because Mars was so low from the UK. In 2018 the planet will again be very low from here, but the season on the planet will be similar to that at opposition in 1986. At the time I accompanied Prof. Jean Dragesco to the Pic. He had worked there previously in 1975. We both took photos and I also made a large number of drawings of Jupiter, the Galilean moons, Saturn and Mars. The photos are all SINGLE exposures by Dragesco (with help from me to achieve the best focus) with a Nikon camera on the so-called 'miracle film' of Kodak, TP 2415. The synthetic green channel and the R(G)B composite image were made two decades later by Johan Warell, and the labelling and light Registax processing were done by me. That was our best night of the ten: Dragesco had at the time returned to his room to rest, and I stayed in the dome. Suddenly the seeing became perfect and I ran to fetch him... running is never a good idea at high altitude, but luckily the perfect seeing continued for a long time. Perhaps viewers will be amused by the results. Remember they are based upon SINGLE red and blue negatives. At the time, Dragesco was able to get a friend to enhance the image by using unsharp masking, and the result (not shown) is rather similar to the result secured with Registax here.

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