Transit of Mercury across the Sun’s disk

Updated May 9, 2016

mt36 Image by Brian Cudnik with the Prairie View Solar Observatory’s 35-cm solar telescope, Nov. 15, 1999.

We have just finished the observations of the crossing of the Sun’s disk by the planet Mercury. Weather prospects were not very good so the setup was limited to a white-light solar filter equipped 4.5-inch reflector and eyepiece. Images were made a focally via smartphone. A total of 18 persons were treated to the view over the course of the day, during several short sessions which coincided with breaks in the cloud deck. This transit of Mercury was the first such event (of Mercury) in 10 years and the first planetary transit of any kind since the Venus transit of June 6, 2012. For lots more information about this event, visit

Images from this event are presented next. Check back for more on the Mercury transit observations.

Mercury Transit 1431UT 9 May 2016 Mercury Transit 16-47-59UT 9 May 2016
2016-05-09T170053UTC_Prescott_Observatory_Arizona_8c5RHm Mercury Transit 18-36-53UT 9 May 2016

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