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Mercury in infrared, 8th July

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About this observation
Observer
Chris Hooker
Time of observation
08/07/2018 - 15:30
Object
Mercury
Observing location
Didcot, Oxfordshire
Equipment
25 cm Newtonian
TeleVue 3x Barlow
Baader IR-pass filter (685nm)
ZWO ASI120MM-S camera
Exposure
2.1 msec
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Mercury just past dichotomy and quite hard to locate at mag 0.22. The low contrast of the planet against the sky required higher gain than on previous occasions, so the images are rather noisy, and the poor seeing meant that there are fewer good frames to stack. One or two bright features can be seen with some confidence, but overall this is a disappointing result. Mercury next attains usable magnitude around the end of August.

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