Mercury
Best time to see: 22 September, from 1 hour before sunrise
Altitude: 7° (low)
Location: Leo
Direction: East
Features: Phase, surface markings
Recommended equipment: 150mm or larger
Mercury isn't visible at the start of the month when it will be an evening object setting before the Sun and too faint to be seen under daytime conditions. Inferior conjunction occurs on 6 September when Mercury lines up with the Sun, passing 3.8° to the south of the Sun's centre.