Mars Apparition - Opposition 2018 JUL 26

A plotting of the planet in equatorial coordinates of current date during 2018 MAY 14 to OCT 08 - See article below.

Mars Declination - 2012-2027

A plotting of the declinations of the planet at oppositions from 2012 to 2027

Mars Angular Diameter - 2017-18

Graph of equatorial angular diameter of Mars measured in arcseconds - Distance in AU = 9.36 / angular diameter

Mars, Earth & Sun at Oppositions - 2003-2018

Diagram demonstrating the relative positions of Mars, Earth and Sun at oppositions from 2003 to 2018

Mars Appearing as Big as a Full Moon!!! - 2010 AUG 27

Diagram demonstrating how Mars would appear as big as a Full Moon on 2010 AUG 27 AS THE SPAMMERS WANTED YOU TO BELIEVE! (LOL)

Mars 01 Mars 02 Mars 03 Mars 04 Mars 05

                            2017-19 APPARITION OF MARS

Reddish Mars currently appears in the predawn eastern sky following its conjunction behind the Sun on  2017 JUL 26. Western quadrature (90° from Sun) will be reached on 2018 MAR 24. Apparent retrograde motion in right ascension will begin on JUN 28.

   A nearly perihelic opposition from the Sun will occur on 2018 JUL 26 with Mars in the sky all night in the constellation Capricornus at declination S 25.5°. Mars’ south pole will appear titled 11.2° toward Earth. Greatest brilliance at magnitude -2.8 is expected on JUL 28. Closest approach to Earth will be on JUL 31 at 0.3850 AU with an angular diameter of 24.3 arcseconds.

   Apparent direct motion in right ascension will resume on 2018 AUG 28. Eastern quadrature will be reached on DEC 02 long before conjunction behind the Sun on 2019 SEP 02.

   During 2017 Mars will appear near other bright planets and stars on the following dates: Venus OCT 05 & Spica NOV 29.

  During 2017 the Moon will appear near Mars on OCT 17, NOV 14 & DEC 13.

NOTE: Event dates in this article are for North American Central Time.

*  A meridian transit occurs when a celestial body crosses an observer’s local north-south line in the sky. That is practically simultaneous with culmination, i.e. the highest altitude for the day. The Mars meridian transit times in the above linked graph can be easily transformed for your location. The given times are nearly the same for the central meridians of all time zones, i.e. those evenly divisible by 15° such as 75°, 90°, 105° or 120°. Do not adjust to UT. Simply add to the chart time 4 minutes for each degree west of a central meridian, or subtract 4 minutes for each degree to the east. If on daylight savings time, add an hour.

Mars Stellar Magnitude - 2017-18

Graph of the brightness of Mars measured in stellar magnitude

Mars 06 Mars 07

Mars Illumination Phase - 2017-18

Graph of the percentage of Mars’ apparent disk illuminated

Mars 08

Mars Meridian Transit Time* - 2017-18

Graph of the times that the planet Mars transits the prime meridian

Mars Apparent Axial Tilt Graph - 2017-18

Graph of the tilt of Mars’ rotational axis as viewed from Earth Negative if south pole tilted toward Earth

Mars 09

© Curt Renz


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