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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 Pisces on April, 22 2018
High Precision Live Sky Chart
00h 26m 13s
+00° 45’ 26”
0.80
 = 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: 89.2°
Max altitude: 39.3°
Azimuth: 270.8°

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 Apr 15 1.66 00h 17m 25s +01° 21’ 34” Pisces
2018 Apr 16 1.49 00h 17m 49s +01° 08’ 43” Pisces
2018 Apr 17 1.34 00h 18m 32s +00° 58’ 27” Pisces
2018 Apr 18 1.21 00h 19m 32s +00° 50’ 49” Pisces
2018 Apr 19 1.09 00h 20m 48s +00° 45’ 47” Pisces
2018 Apr 20 0.98 00h 22m 22s +00° 43’ 14” Pisces
2018 Apr 21 0.88 00h 24m 11s +00° 43’ 09” Pisces
2018 Apr 22 0.80 00h 26m 13s +00° 45’ 26” Pisces
2018 Apr 23 0.72 00h 28m 31s +00° 50’ 03” Cetus
2018 Apr 24 0.65 00h 31m 01s +00° 56’ 53” Cetus
2018 Apr 25 0.59 00h 33m 44s +01° 05’ 53” Cetus
2018 Apr 26 0.53 00h 36m 41s +01° 16’ 58” Cetus
2018 Apr 27 0.47 00h 39m 48s +01° 30’ 02” Cetus
2018 Apr 28 0.42 00h 43m 08s +01° 45’ 00” Cetus

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