An object is said to be at solar conjunction when it makes its closest approach to the Sun in the night sky.
The planets are usually lost in the Sun's glare and virtually impossible to observe for a few weeks when they pass solar conjunction. One exception is Mercury, which moves around its orbit so quickly that it can pass from solar conjunction to maximum elongation in less than a month.
List of solar conjunctions
The table below lists the dates when objects are at solar conjunction in 2018, computed from NASA's DE405 planetary ephemeris. To show dates in other years, use the dropdown control.