The planet Mercury

Image of Mercury
© NASA/JPL/MESSENGER
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From Seattle , Mercury is difficult to observe as it will appear no higher than 11° above the horizon. It will become visible around 21:15 (PDT) as the dusk sky fades, 11° above your north-western horizon. It will then sink towards the horizon, setting 1 hour and 58 minutes after the Sun at 22:37.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.
Name Mercury
Object Type Inferior Planet
Current Position
Constellation:Taurus
Magnitude:-0.09 (V) [1]
Absolute mag (H):-0.65 [1]
Slope parameter (n):2.00 [1]
Right ascension:04h48m [2]
Declination:+24°53' [2]
Distance:0.92 AU
7.64 lightmin [2]
Orbital Elements [2]
Semi-major axis:0.39 AU
Eccentricity:0.205631
Inclination:7.00°
Longitude ascending node:48.33°
Argument of perihelion:29.12°
Epoch of elements:01 January 2000
Mean Anomaly at epoch:174.79°
Derived quantities
Perihelion:0.31 AU
Aphelion:0.47 AU
Orbital period:0.24 years
Sources
[1] Robin M. Green, Spherical Astronomy, 1985, ISBN 0-521-31779-7
[2] Explanatory Supplement to the Astronomical Almanac. 1992. K. P. Seidelmann, Ed., p.316
Visibility from Seattle

All times shown in Seattle local time.

Events
18 Apr 2021  –  Mercury at superior solar conjunction
26 Apr 2021  –  Mercury at perihelion
11 May 2021  –  Mercury at dichotomy
16 May 2021  –  Mercury at highest altitude in evening sky
17 May 2021  –  Mercury at greatest elongation east
09 Jun 2021  –  Mercury at aphelion
10 Jun 2021  –  Mercury at inferior solar conjunction
04 Jul 2021  –  Mercury at greatest elongation west
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Seattle

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47.61°N
122.33°W
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