Mercury will be at the ‘greatest elongation point’ with the sun over the eastern horizon on Thursday (May 18) at 2 am local time in Doha. People in Arab countries should be away from environmental and light pollution in order to observe Mercury with an astronomical telescope.
It will rise over in Doha sky at Doha 3.34am, the event is special as people can observe the planet at its highest point above the eastern horizon. The elongation is the angle between an object and the sun as seen from Earth. When a planet is at “greatest elongation” (east or west), it is at its furthest distance from the sun.
Once the planet reaches its greatest elongation, the distance between Mercury and the sun reduces each night.