The planet Neptune

Image of Neptune
© NASA/Voyager 2
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From Ashburn (click to change), Neptune will become visible at around 18:18 (EST) as the dusk sky fades, 26° above your south-western horizon. It will then sink towards the horizon, setting 3 hours and 40 minutes after the Sun at 20:49.

Name Neptune
Object Type Superior Planet
Current Position
Brightness (V):Mag 7.9
Right Ascension:22h55m
Source for position: Computed using orbital elements from Robin M. Green, Spherical Astronomy, 1985, ISBN 0-521-31779-7
Orbital Elements
Semi-major axis:30.27 AU
Longitude ascending node:131.80°
Argument of perihelion:225.27°
Epoch of elements:14 January 1985
Mean Anomaly at epoch:-84.81°
Source: Robin M. Green, Spherical Astronomy, 1985, ISBN 0-521-31779-7
Derived quantities
Perihelion:30.07 AU
Aphelion:30.48 AU
Orbital period:166.58 years
07 Sep 2018, 14:12 EDT  –  Neptune at opposition
07 Dec 2018, 09:02 EST  –  Close approach of Mars and Neptune
10 Sep 2019, 03:10 EDT  –  Neptune at opposition
27 Jan 2020, 15:02 EST  –  Close approach of Venus and Neptune
11 Sep 2020, 16:12 EDT  –  Neptune at opposition
14 Sep 2021, 05:07 EDT  –  Neptune at opposition
27 Apr 2022, 15:10 EDT  –  Close approach of Venus and Neptune
16 Sep 2022, 18:07 EDT  –  Neptune at opposition
Printable finder charts
The path traced across the sky by Neptune in 2018




Color scheme