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Ephemeris Calculator

Compute Mars ephemerides for any date and time between 01 Jan 2013 and 31 Dec 2075 and display the predicted position in an interactive sky map.

Time: : UTC
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Mars

Available Resources

Mars Sky Charts and Coordinates

This is a simplified sky chart, showing where Mars is now with respect to the brightest stars and constellations. More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Mars in Gemini on June, 27 2017
High Precision Live Sky Chart
07h 03m 21s
+23° 38’ 34”
1.70
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Mars Rise and Set Times

Today's Mars rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 66.4°
Max altitude: 62.2°
Azimuth: 293.6°

Mars Ephemeris

The following table lists the ephemerides of Mars computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Mars in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Jun 20 1.69 06h 43m 22s +24° 02’ 00” Gemini
2017 Jun 21 1.70 06h 46m 14s +23° 59’ 13” Gemini
2017 Jun 22 1.70 06h 49m 05s +23° 56’ 16” Gemini
2017 Jun 23 1.70 06h 51m 57s +23° 53’ 07” Gemini
2017 Jun 24 1.70 06h 54m 48s +23° 49’ 45” Gemini
2017 Jun 25 1.70 06h 57m 39s +23° 46’ 13” Gemini
2017 Jun 26 1.70 07h 00m 30s +23° 42’ 29” Gemini
2017 Jun 27 1.70 07h 03m 21s +23° 38’ 34” Gemini
2017 Jun 28 1.70 07h 06m 11s +23° 34’ 27” Gemini
2017 Jun 29 1.70 07h 09m 02s +23° 30’ 10” Gemini
2017 Jun 30 1.70 07h 11m 52s +23° 25’ 41” Gemini
2017 Jul 01 1.70 07h 14m 42s +23° 21’ 02” Gemini
2017 Jul 02 1.70 07h 17m 30s +23° 16’ 11” Gemini
2017 Jul 03 1.70 07h 20m 20s +23° 11’ 11” Gemini

Distance of Mars from Earth

The following chart shows the distance of Mars from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval. The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of Mars is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Mars from Earth between January 2013 and December 2075

Light Curve of Mars

The following chart is the predicted light curve (visual magnitude as a function of time) of Mars, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Mars between January 2013 and December 2075

Mars Physical Data

The following shows the known values of the most important physical parameters of Mars. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 6779 km 0.5320
Mass 0.641693 x 1024 kg 0.1074
Density 3.934 gr/cm3 0.7135
Escape Velocity 5.03 km/s 0.4495
Sideral Rotation 24.6230 hours 1.0288
Absolute Magnitude -1.52
Geometric Albedo 0.15