Difference between revisions of "Neptune"

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NeptuneOrbiter2001.jpg|Neptune in Orbiter 2001
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NeptuneOrbiter2001.jpg|<center>Neptune in Orbiter 2001</center>
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Neptune Voyager2 color calibrated.png|<center>Neptune as seen by the [[w:Voyager 2|Voyager 2]] spacecraft on 17 August 1989<br>Wikimedia Commons</center>
 
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Revision as of 03:45, 1 August 2024

Neptune
NeptuneScrshot.jpg
Neptune in Orbiter
Designation
Name Neptune
Reference body Sun
Number of satellites
Planetary mean orbits
Epoch J2000 (1 January 2000)
Semimajor axis (a) 30.06896348 AU
(4.49825291×1012 km)
Eccentricity (e) 0.00858587
Inclination (i) 1.76917°
(0.0308778 radian)
Longitude of the ascending node (LAN, ☊) 131.72169°
(2.298977 radian)
Longitude of periapsis (ϖ) 44.97135°
(0.784898 radian)
Mean longitude (L) 304.88003°
(5.321160 radian)
Planetary orbital element centennial rates
Semimajor axis (a) -0.00125196 AU/Century
Eccentricity (e) 0.0000251 Century-1
Inclination (i) -3.64 seconds/Century
Longitude of the ascending node (LAN, ☊) -151.25 seconds/Century
Longitude of periapsis (ϖ) -844.43 seconds/Century
Mean longitude (L) 786449.21 seconds/Century
Selected physical parameters
Mean radius 24624.0±21 km
Mass 1.024569×1026 kg
Density 1.638 g/cm3
Sidereal rotation period 16.11±0.01 hours
Sidereal orbit period 163.72321 years
Magnitude V(1,0) -6.87
Geometric albedo 0.41
Equatorial gravity 11.00±0.05 m/s2
Escape velocity 23.5 km/s
Rotation elements
North pole right ascension (α1) 295.25°
North pole declination (δ1) 40.63°
Obliqutiy of ecliptic 29.48°
Longitude of Sun's transit 221.13°
Atmospheric parameters
Surface Pressure >>104 kPa
Surface Density ~0.45 kg/m3 at 1 bar
Scale height 19.1-20.3 km
Average temperature ~58 K
Wind speeds 0-200 m/s
Ecliptic position from primary*
Note *Elements given are from Orbiter.pdf (2016)

Neptune is the 8th planet from the Sun, the fourth largest planet by size and the third by mass. Neptune was actually observed by Galileo Galilei on at least two occassions in 1612 and 1613, but did not realize that it was a planet, mistaking it for a star. In 1845, John Couch Adams and Urbain Le Verrier indpendently calculated that there should be another planet based upon perturbations of the orbit of Uranus. Le Verrier sent a letter with his findings to Johann Gottfried Galle who was then the first observer of Neptune and recognized it for what it is.

Neptune in Orbiter

Neptune has been a part of the Orbiter family of bodies at least since the release of Orbiter 2001. In the 2001 version, Neptune had no moons, but 14 moons have been added in later releases of Orbiter or as a part of add-ons.

Orbiter versions and add-ons which include Neptune.

Orbiter versions and add-ons which include Neptune
Add-on Source Version Author Type Release Date Compatibility Wiki article
Orbiter 2002 O-F Resources 020419 martins Orbiter Download 19 April 2002 Orbiter 2002
Orbiter 2001 O-F Resources 010503 martins Orbiter Download 3 May 2001 Orbiter 2001

See also

Neptune at Wikipedia

Natural satellites

:
Neptune's natural satellites

edit

Named satellites:

Despina | Galatea | Halimede | Hippocamp | Laomedeia | Larissa | Naiad | Nereid | Neso | Proteus | Psamathe | Sao | Thalassa | Triton

Numbered Satellites:

S/2021 N 1

See also: Pronunciation key | rings of Neptune
edit The Solar System
Central star

Sun (Sol)

Planets

Mercury - Venus - Earth - Mars - Jupiter - Saturn - Uranus - Neptune

Natural satellites

Moon - Phobos - Deimos - Io - Europa - Ganymede - Titan - more...

Add-ons

Planets - Dwarf Planets - Small objects - Natural satellites - Alternative star systems

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