Mars Opposition 2027

What this countdown tracks

The Mars opposition of Friday 19 February 2027 — the only Mars opposition in the 2026–2028 window. At opposition, Mars sits exactly opposite the Sun in Earth's sky, rising at sunset, transiting the local meridian at midnight, and setting at sunrise; it is the best moment of the synodic cycle to observe and image the Red Planet from Earth. The 19 February 2027 opposition places Mars at magnitude -1.2 and 0.68 astronomical units from Earth, with an apparent disc of approximately 13.8 arcseconds.

About this event

Earth and Mars orbit the Sun at different speeds, with Earth completing one revolution in 365.25 days and Mars in 686.97 days. The synodic period — the interval between two successive Mars oppositions — averages roughly 779.94 days, or about 2 years 1 month 18 days. The 19 February 2027 opposition follows the 16 January 2025 opposition and precedes the 19 March 2029 opposition. Because Mars's orbit is significantly more elliptical than Earth's, the Earth-Mars distance at opposition varies from a perihelic minimum of about 0.37 AU (a "great opposition") to an aphelic maximum of about 0.68 AU. The 2027 opposition is at the aphelic end of this range — meaning Mars's apparent disc is smaller than at the celebrated 2018 perihelic opposition (24.3 arcseconds) but the planet is still bright, well-positioned and observable.

The geometry on 19 February 2027 has Mars in the constellation Leo at approximately 10h 35m right ascension and +9° declination — high in the evening sky for Northern Hemisphere observers and low for Southern Hemisphere observers. The Mars-Earth distance reaches its minimum of 0.6781 AU on roughly 17 February 2027 (closest approach is typically several days offset from opposition), with apparent diameter of 13.8 arcseconds and apparent magnitude of -1.20. The planet's polar caps, dark albedo features (Syrtis Major, Mare Erythraeum, Mare Acidalium, Solis Lacus, the Tharsis volcanoes), and the seasonal evolution of the Martian atmosphere are all observable in moderate amateur telescopes (4 to 8 inch apertures).

What to expect

Amateur astronomers can expect Mars to be the brightest planet in the evening sky after Venus and Jupiter in the early 2027 weeks, second only to those two near maximum brightness. Mars will be visible all night, with imaging targets including the polar caps, the canals (apparent dark linear markings, an artefact of low resolution), Olympus Mons and the Tharsis volcanoes (visible as bright clouds at dawn), Hellas basin (low-albedo region in the southern hemisphere), and seasonal dust storms. The Sky & Telescope, Astronomy magazine, and BBC Sky at Night magazine publish detailed observing guides. Astrophotographers with planetary imaging setups (high-frame-rate cameras, ZWO ASI cameras, IR-cut filters) can produce images that rival professional observatory shots from a generation ago.

Major observatories — including the Lowell Observatory in Flagstaff, the Mount Wilson Observatory, the Astronomical League members, and the Royal Astronomical Society in the UK — typically host public observing nights in the weeks around opposition. NASA's Mars-orbiting fleet (MAVEN, Mars Reconnaissance Orbiter, Odyssey, Hope, Mangalyaan-2 if launched) and the surface assets (Curiosity, Perseverance, Zhurong-2 if active) gather data through opposition; the InSight mission has concluded.

Past oppositions

• 16 January 2025 — Mars opposition in Gemini, magnitude -1.4, 0.64 AU, 14.6 arcseconds.
• 8 December 2022 — opposition in Taurus, magnitude -1.9, 0.55 AU, 17.0 arcseconds.
• 14 October 2020 — opposition in Pisces, magnitude -2.6, 0.42 AU, 22.6 arcseconds (near-perihelic).
• 27 July 2018 — Great Opposition, magnitude -2.8, 0.385 AU, 24.3 arcseconds (perihelic).
• 22 May 2016 — opposition in Libra, magnitude -2.0, 0.51 AU, 18.6 arcseconds.

How to follow

NASA's Mars Exploration Program (mars.nasa.gov) and the Solar System Dynamics group at NASA JPL publish ephemerides and opposition data. The American Astronomical Society, the Royal Astronomical Society, the Astronomical League and the European Astronomical Society host public events. Sky & Telescope, Astronomy magazine, BBC Sky at Night and EarthSky publish observing guides. Local amateur astronomy clubs often host public observing nights at the opposition. Live image streams via the Virtual Telescope Project (operated by Gianluca Masi from Italy) and the Slooh observatory network make the opposition accessible to anyone with internet access.

Related countdowns

Pair the Mars opposition with the total solar eclipse of August 2027 for the year's two biggest naked-eye astronomy events. Mars-mission context comes from Chandrayaan-4 launch, NASA Dragonfly launch, and the planned Shukrayaan Venus orbit insertion.

FAQ

When is the Mars opposition of 2027? Friday 19 February 2027, with closest approach to Earth on or about 17 February 2027. Where is Mars in the sky? In the constellation Leo, rising at sunset, transiting the local meridian at midnight, and setting at sunrise. Why does the Mars opposition matter? It is the best moment of the synodic cycle to observe and image Mars from Earth — and the only Mars opposition in the 2026–2028 window. How bright is Mars at opposition? Apparent magnitude -1.2 — brighter than every star in the sky and second only to Venus and Jupiter among the planets at this opposition.