Dominic Ford, Editor
From the Appulses feed
The Moon and Saturn will make a close approach, passing within 2°27' of each other. The Moon will be 25 days old.
From Fairfield, the pair will be difficult to observe as they will appear no higher than 18° above the horizon. They will be visible in the dawn sky, rising at 04:13 (EST) – 2 hours and 41 minutes before the Sun – and reaching an altitude of 18° above the south-eastern horizon before fading from view as dawn breaks around 06:35.
The Moon will be at mag -10.6; and Saturn will be at mag 0.4. Both objects will lie in the constellation Sagittarius.
They 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 the Moon and Saturn around the time of closest approach is available here.
The positions of the pair at the moment of closest approach 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 46° from the Sun, which is in Capricornus at this time of year.
|The sky on 11 February 2018|
25 days old
All times shown in EST.
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.
|21 Dec 2017||– Saturn at solar conjunction|
|17 Apr 2018||– Saturn at aphelion|
|27 Jun 2018||– Saturn at opposition|
|02 Jan 2019||– Saturn at solar conjunction|