Solar Conjunction

by Dominic Ford, Editor
Last updated: 16 Jul 2020
Solar Conjunction

The Moon appears as a thin crescent when it is close to solar conjunction, which is better known as new moon. Simulated image courtesy of Tom Ruen.

An object is said to be at solar conjunction when it makes its closest approach to the Sun in the sky.

The planets are typically lost in the Sun's glare and impossible to observe for a few weeks when they pass solar conjunction. Mercury can reappear within only a few days, since it 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 2021, computed from NASA's DE430 planetary ephemeris. To show events in other years, use the control below.

Change year

Objects at solar conjunction in 2021

Date Object
Date Object
14 Jan 2021 21:26 UTC134340 Pluto at solar conjunctionMore information »
24 Jan 2021 03:04 UTCSaturn at solar conjunctionMore information »
29 Jan 2021 01:44 UTCJupiter at solar conjunctionMore information »
08 Feb 2021 13:41 UTCMercury at solar conjunctionMore information »
11 Mar 2021 00:02 UTCNeptune at solar conjunctionMore information »
26 Mar 2021 06:20 UTCVenus at solar conjunctionMore information »
07 Apr 2021 11:49 UTC1 Ceres at solar conjunctionMore information »
14 Apr 2021 03:04 UTC136199 Eris at solar conjunctionMore information »
19 Apr 2021 01:36 UTCMercury at solar conjunctionMore information »
30 Apr 2021 19:55 UTCUranus at solar conjunctionMore information »
11 Jun 2021 01:05 UTCMercury at solar conjunctionMore information »
01 Aug 2021 13:54 UTCMercury at solar conjunctionMore information »
30 Sep 2021 14:49 UTC136472 Makemake at solar conjunctionMore information »
08 Oct 2021 04:19 UTCMars at solar conjunctionMore information »
09 Oct 2021 16:11 UTCMercury at solar conjunctionMore information »
21 Oct 2021 22:19 UTC136108 Haumea at solar conjunctionMore information »
29 Nov 2021 04:20 UTCMercury at solar conjunctionMore information »

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