The planet Neptune

Image of Neptune
© NASA/Voyager 2
Finder chart
Please wait
Loading 0/4
Click and drag to rotate
Mouse wheel to zoom in/out
Touch with mouse to dismiss
Click and drag the chart above to pan around the sky, or use the mouse wheel to zoom. Click to enlarge.

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
Constellation:Aquarius
Brightness (V):Mag 7.9
Right Ascension:22h55m
Declination:-07°51'
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
Eccentricity:0.006851
Inclination:1.77°
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
Events
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

Ashburn

Latitude:
Longitude:
Timezone:

39.04°N
77.49°W
EST

Color scheme