Neptune (Planet)
© NASA/Voyager 2
Finder chart
Click and drag the chart above to pan around the sky, or use the mouse wheel to zoom.
Click to enlarge.
From San Diego , Neptune is visible in the evening sky, becoming accessible around 17:45 (PST), 53° above your southern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 18:08, 53° above your southern horizon. It will continue to be observable until around 22:12, when it sinks below 21° above your western horizon.
Begin typing the name of a town near to you, and then select the town from the list of options
which appear below.
|
Name
Neptune
|
Object type
Superior planet
|
Current position
| Computed for: | 11 December 2023 |
| Right ascension: | 23h42m [2] |
| Declination: | -03°18' [2] |
| Constellation: | Aquarius |
| Magnitude: | 7.88 (V) [1] |
| Angular diameter: | 2.3 arcsec[2] |
| Distance: | 29.79 AU 247.73 lightmin [2] |
| Angular motion (speed): | 56.88 arcmin/yr[2] |
| Angular motion (pos ang): | 53.1° |
Orbital elements [2]
| Semi-major axis: | 30.07 AU |
| Eccentricity: | 0.008586 |
| Inclination: | 1.77° |
| Longitude ascending node: | 131.72° |
| Argument of perihelion: | -86.75° |
| Epoch of elements: | 01 January 2000 |
| Mean Anomaly at epoch: | 259.91° |
| Absolute mag (H): | -6.87 [1] |
| Slope parameter (n): | 2.00 [1] |
Derived quantities
| Perihelion: | 29.81 AU |
| Aphelion: | 30.33 AU |
| Orbital period: | 164.88 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 San Diego
All times shown in San Diego local time.
Events
| 06 Dec 2023 | – Neptune ends retrograde motion |
| 19 Dec 2023 | – Lunar occultation of Neptune |
| 15 Jan 2024 | – Lunar occultation of Neptune |
| 11 Feb 2024 | – Lunar occultation of Neptune |
| 17 Mar 2024 | – Neptune at solar conjunction |
| 04 May 2024 | – Lunar occultation of Neptune |
| 31 May 2024 | – Lunar occultation of Neptune |
| 28 Jun 2024 | – Lunar occultation of Neptune |
Printable finder charts
