Dominic Ford, Editor
From the Conjunctions feed
Venus and Mercury will share the same right ascension, with Venus passing 3°53' to the south of Mercury.
From Seattle, the pair will be difficult to observe as they will appear no higher than 10° above the horizon. They will become visible around 19:36 (PDT) as the dusk sky fades, 10° above your western horizon. They will then sink towards the horizon, setting 1 hour and 26 minutes after the Sun at 20:41.
Venus will be at mag -3.9, and Mercury at mag 0.1, both in the constellation Pisces.
The pair will be too widely separated to fit within the field of view of a telescope, but will be visible to the naked eye or through a pair of binoculars.
A graph of the angular separation between Venus and Mercury around the time of closest approach is available here.
The positions of the two objects at the moment of conjunction will be as follows:
|Object||Right Ascension||Declination||Constellation||Magnitude||Angular Size|
The coordinates above are given in J2000.0. The pair will be at an angular separation of 16° from the Sun, which is in Pisces at this time of year.
|The sky on 17 March 2018|
30 days old
All times shown in PDT.
Never attempt to point a pair of binoculars or a telescope at an object close to the Sun. Doing so may result in immediate and permanent blindness.
The circumstances of this event were computed using the DE405 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).
This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.
|13 Aug 2017||– Venus reaches highest point in morning sky|
|21 May 2018||– Venus reaches highest point in evening sky|
|17 Aug 2018||– Venus at greatest elongation east|
|08 Dec 2018||– Venus reaches highest point in morning sky|
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.