Dominic Ford, Editor
From the Conjunctions feed
The Moon and Mars will share the same right ascension, with the Moon passing 6°43' to the north of Mars. The Moon will be 14 days old.
From Seattle, the pair will be difficult to observe as they will appear no higher than 16° above the horizon. They will be visible between 22:33 and 04:05. They will become accessible around 22:33, when they rise to an altitude of 8° above your south-eastern horizon. They will reach its highest point in the sky at 01:21, 16° above your southern horizon. They will become inaccessible around 04:05 when they sink below 8° above your south-western horizon.
The Moon will be at mag -12.5, and Mars at mag -2.8, both in the constellation Capricornus.
The pair will be too widely separated to fit within the field of view of a telescope or pair of binoculars, but will be visible to the naked eye.
A graph of the angular separation between the Moon and Mars 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 179° from the Sun, which is in Cancer at this time of year.
|The sky on 27 July 2018|
14 days old
All times shown in PDT.
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.
|26 Jul 2018||– Mars at opposition|
|31 Jul 2018||– Mars at perigee|
|16 Sep 2018||– Mars at perihelion|
|25 Aug 2019||– Mars at aphelion|