Neptune (Planet)
© NASA/Voyager 2
Finder chart
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From Cambridge , Neptune is not observable – it will reach its highest point in the sky during daytime and is 3° below the horizon at dawn.
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|
Name
Neptune
|
Object type
Superior planet
|
Current position
| Computed for: | 16 April 2024 |
| Right ascension: | 23h55m [2] |
| Declination: | -01°52' [2] |
| Constellation: | Pisces |
| Magnitude: | 7.95 (V) [1] |
| Angular diameter: | 2.2 arcsec[2] |
| Distance: | 30.78 AU 256.00 lightmin [2] |
| Angular motion (speed): | 2.09 arcmin/day[2] |
| Angular motion (pos ang): | 67.3° |
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 Cambridge
All times shown in Cambridge local time.
Events
| 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 |
| 02 Jul 2024 | – Neptune enters retrograde motion |
| 25 Jul 2024 | – Lunar occultation of Neptune |
| 21 Aug 2024 | – Lunar occultation of Neptune |
| 18 Sep 2024 | – Lunar occultation of Neptune |
Printable finder charts
