The planet Neptune
© NASA/Voyager 2
Finder chart
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From Ashburn (click to change), Neptune is visible in the dawn sky, rising at 00:51 (EDT) – 4 hours and 51 minutes before the Sun – and reach an altitude of 34° above the south-eastern horizon before fading from view as dawn breaks at around 04:20.
|
Name
Neptune
|
Object Type
Superior Planet
|
Current Position
| Constellation: | Aquarius |
| Magnitude: | 7.88 (V)[1] |
| Right Ascension: | 23h10m [1] |
| Declination: | -06°18' [1] |
Orbital Elements[1]
| 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° |
Derived quantities
| Perihelion: | 30.07 AU |
| Aphelion: | 30.48 AU |
| Orbital period: | 166.58 years |
Source
| [1] | Robin M. Green, Spherical Astronomy, 1985, ISBN 0-521-31779-7 |
Events
| 07 Sep 2018, 14:13 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 |
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