Mercury will reach this point on Saturday, March 6.
This will also be the planet’s greatest western elongation for the whole of 2021.
In other words, Mercury is best seen in the morning sky and the best evening view will not arrive until September 2021.
But before that happens, keep your eyes peeled for the Jupiter-Mercury conjunction.
Mr Kerss said: “Although the western elongation of Mercury will be very fine on Saturday, I would take time to look for it on Friday as well.
“Friday morning brings a close pairing of Jupiter and Mercury – a beautiful conjunction that at its best has the two sitting about one degree apart in the sky, with the much brighter Jupiter to the south.”