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🌎 Location: Greenwich, United Kingdom [change]
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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 Libra on October, 16 2018
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
14h 25m 47s
-15° 42’ 00”
5.1”
-0.30

Mercury Rise and Set Times

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

Azimuth: 105.7°
Max altitude: 22.7°
Azimuth: 254.0°

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 Right AscensionR.A. DeclinationDec. MagnitudeMag Apparent DiameterDiameter Constellation
2018 Oct 09 13h 44m 03s -11° 08’ 17” -0.50 4.9” Virgo
2018 Oct 10 13h 49m 50s -11° 48’ 10” -0.46 4.9” Virgo
2018 Oct 11 13h 55m 36s -12° 27’ 20” -0.43 4.9” Virgo
2018 Oct 12 14h 01m 21s -13° 05’ 48” -0.40 5.0” Virgo
2018 Oct 13 14h 07m 05s -13° 43’ 32” -0.37 5.0” Virgo
2018 Oct 14 14h 12m 47s -14° 20’ 30” -0.34 5.0” Virgo
2018 Oct 15 14h 18m 29s -14° 56’ 43” -0.32 5.0” Virgo
2018 Oct 16 14h 24m 11s -15° 32’ 07” -0.30 5.1” Libra
2018 Oct 17 14h 29m 52s -16° 06’ 42” -0.29 5.1” Libra
2018 Oct 18 14h 35m 30s -16° 40’ 27” -0.27 5.1” Libra
2018 Oct 19 14h 41m 09s -17° 13’ 22” -0.26 5.2” Libra
2018 Oct 20 14h 46m 46s -17° 45’ 21” -0.25 5.2” Libra
2018 Oct 21 14h 52m 23s -18° 16’ 28” -0.24 5.3” Libra
2018 Oct 22 14h 57m 59s -18° 46’ 38” -0.23 5.3” Libra

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