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Mercury

Available Resources

Mercury Sky Charts and Coordinates

This is a simplified sky chart, showing where Mercury 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.

Mercury in Gemini on June, 19 2018
High Precision Live Sky Chart
06h 53m 45s
+24° 50’ 12”
-0.85
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Mercury Rise and Set Times

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

Azimuth: 65.2°
Max altitude: 63.4°
Azimuth: 294.8°

Mercury Ephemeris

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

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Jun 12 -1.57 05h 51m 06s +24° 57’ 19” Taurus
2018 Jun 13 -1.44 06h 00m 27s +25° 04’ 09” Taurus
2018 Jun 14 -1.33 06h 09m 42s +25° 08’ 14” Gemini
2018 Jun 15 -1.22 06h 18m 48s +25° 09’ 39” Gemini
2018 Jun 16 -1.12 06h 27m 47s +25° 08’ 26” Gemini
2018 Jun 17 -1.02 06h 36m 38s +25° 04’ 44” Gemini
2018 Jun 18 -0.94 06h 45m 16s +24° 58’ 36” Gemini
2018 Jun 19 -0.85 06h 53m 45s +24° 50’ 12” Gemini
2018 Jun 20 -0.78 07h 02m 03s +24° 39’ 38” Gemini
2018 Jun 21 -0.70 07h 10m 10s +24° 27’ 02” Gemini
2018 Jun 22 -0.63 07h 18m 05s +24° 12’ 33” Gemini
2018 Jun 23 -0.57 07h 25m 47s +23° 56’ 16” Gemini
2018 Jun 24 -0.50 07h 33m 17s +23° 38’ 21” Gemini
2018 Jun 25 -0.44 07h 40m 35s +23° 18’ 55” Gemini

Distance of Mercury from Earth

The following chart shows the distance of Mercury 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 Mercury is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Mercury from Earth between January 2013 and December 2075

Light Curve of Mercury

The following chart is the predicted light curve (visual magnitude as a function of time) of Mercury, 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 Mercury between January 2013 and December 2075

Mercury Physical Data

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

Physical Parameter Value Relative to Earth
Diameter 4879.4 km 0.3829
Mass 0.330104 x 1024 kg 0.0553
Density 5.427 gr/cm3 0.9843
Escape Velocity 4.25 km/s 0.3798
Sideral Rotation 1,407.5088 hours 58.8068
Absolute Magnitude -0.6
Geometric Albedo 0.106