The planet Neptune

Image of Neptune
© NASA/Voyager 2
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From Seattle , Neptune is visible between 21:17 and 03:39. It will become accessible around 21:17, when it rises to an altitude of 21° above your south-eastern horizon. It will reach its highest point in the sky at 00:30, 36° above your southern horizon. It will become inaccessible around 03:39 when it sinks below 21° above your south-western horizon.

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Name Neptune
Object Type Superior Planet
Current Position
Magnitude:7.82 (V) [1]
Absolute mag (H):-6.87 [1]
Slope parameter (n):2.00 [1]
Right ascension:23h12m [1]
Declination:-06°11' [1]
Distance:28.94 AU
240.72 lightmin [1]
Orbital Elements [1]
Semi-major axis:30.27 AU
Longitude ascending node:131.80°
Argument of perihelion:225.27°
Epoch of elements:15 January 1985
Mean Anomaly at epoch:-84.81°
Derived quantities
Perihelion:30.07 AU
Aphelion:30.48 AU
Orbital period:166.58 years
[1] Robin M. Green, Spherical Astronomy, 1985, ISBN 0-521-31779-7
10 Sep 2019  –  Neptune at opposition
27 Jan 2020  –  Close approach of Venus and Neptune
11 Sep 2020  –  Neptune at opposition
14 Sep 2021  –  Neptune at opposition
27 Apr 2022  –  Close approach of Venus and Neptune
16 Sep 2022  –  Neptune at opposition
19 Sep 2023  –  Neptune at opposition
28 Apr 2024  –  Close approach of Mars and Neptune
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