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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 Declinations and Altitudes at Oppositions

A plotting of Mars through the zodiac at oppositions during coming years, plus data of its right ascensions, declinations and transit altitudes

Mars Angular Diameter - 2018-19

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

Mars, Earth & Sun at Oppositions

Diagram of relative positions of Mars, Earth & Sun at oppositions during coming years, plus data on distance, angular size & brightness

Mars Appearing as Big as a Full Moon!!!

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 08 Mars 03 Mars 04

                     2017-19 APPARITION OF MARS

Reddish Mars’ perihelic opposition from the Sun occurred on 2018 JUL 26-27 with Mars in the sky all night in the constellation Capricornus at declination S 25.5°. Mars’ south pole appeared titled 11.2° toward Earth. Greatest brilliance at magnitude -2.8 was expected on JUL 28. Closest approach to Earth was on JUL 31 at 0.3850 AU with an angular diameter of 24.3 arcseconds.

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

   During the remainder of 2018 Mars will not appear near any more bright planets or first magnitude stars.

   During the remainder of 2018 the Moon will appear near Mars on OCT 18, NOV 15 (occultation) & DEC 14.

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 - 2018-19

Graph of the brightness of Mars measured in stellar magnitude

Mars 05 Mars 06

Mars Illumination Phase - 2018-19

Graph of the percentage of Mars’ apparent disk illuminated

Mars 07

Mars Meridian Transit Time* - 2018-19

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

Mars Apparent Axial Tilt Graph - 2018-19

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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