Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

Mercury

Mercury is currently in the constellation of Virgo. The current Right Ascension of Mercury is 14h 12m 36s and the Declination is -15° 18’ 33” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Mercury is 3.99 (JPL).

Summary of key facts about Mercury [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

14h 12m 36s
-15° 18’ 33”
Virgo
3.99

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Additional information about Mercury available on TheSkyLive:

Available Resources

Mercury Position and Finder Charts

Below we provide Mercury finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Mercury in Virgo on October, 22 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Mercury in Virgo on October, 22 2020
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Mercury is right now. Click on the image to see a more detailed fullscreen tracker view.

Mercury
RA: 14h 12m 36s
Dec: -15° 18’ 33”
Deep sky finder chart for Mercury
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Mercury?, a page that provides all the information needed to find Mercury in the sky and additional links to sky charts.

Mercury Distance from Earth

The distance of Mercury from Earth is currently 100,498,818 kilometers, equivalent to 0.671793 Astronomical Units. Light takes 5 minutes and 35.2280 seconds to travel from Mercury and arrive to us.

100,498,818
0.671793
5 minutes and 35.2280 seconds

The following chart shows the distance of Mercury from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Mercury from Earth between January 1900 and January 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of Mercury from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Mercury to Earth

Between January 1900 and January 2100, the closest approach of Mercury to Earth happens on Sun May 31 2015 at a distance of 0.549036 Astronomical Units, or 82,134,610 kilometers:

Sun May 31 2015
82,134,610
0.549036

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Mercury brightness

The current visual magnitude of Mercury is 3.99.

3.99
10.0”

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 1900 and January 2100

Mercury rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Mercury rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 105.7°
Max altitude: 23.0°
Azimuth: 254.6°

The rise and set times are defined as the time at which the upper limb of Mercury touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

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

Mercury 15 Days 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
2020 Oct 15 14h 31m 19s -18° 19’ 50” 0.74 8.8” Libra
2020 Oct 16 14h 30m 42s -18° 11’ 29” 0.94 9.0” Libra
2020 Oct 17 14h 29m 31s -17° 59’ 02” 1.18 9.2” Libra
2020 Oct 18 14h 27m 51s -17° 42’ 19” 1.48 9.4” Libra
2020 Oct 19 14h 25m 37s -17° 21’ 08” 1.83 9.6” Libra
2020 Oct 20 14h 22m 54s -16° 55’ 27” 2.26 9.7” Libra
2020 Oct 21 14h 19m 41s -16° 25’ 18” 2.77 9.8” Virgo
2020 Oct 22 14h 16m 03s -15° 50’ 53” 3.38 9.9” Virgo
2020 Oct 23 14h 12m 02s -15° 12’ 38” 4.09 10.0” Virgo
2020 Oct 24 14h 07m 46s -14° 31’ 09” 4.92 10.1” Virgo
2020 Oct 25 14h 03m 21s -13° 47’ 17” N.A. 10.1” Virgo
2020 Oct 26 13h 58m 56s -13° 02’ 06” N.A. 10.0” Virgo
2020 Oct 27 13h 54m 39s -12° 16’ 45” N.A. 9.9” Virgo
2020 Oct 28 13h 50m 38s -11° 32’ 31” 4.47 9.8” Virgo