Neptuno (planeta)
From Wikipedia
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| Discovery | |||||||
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| Discovered by | Urbain Le Verrier John Couch Adams Johann Galle |
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| Discovered on | September 23, 1846 | ||||||
| Orbital characteristics (Epoch J2000) | |||||||
| Semi-major axis | 4,498,252,900 km 30.068 963 48 AU |
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| Orbital circumference | 28.263 Tm 188.925 AU |
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| Eccentricity | 0.008 585 87 | ||||||
| Perihelion | 4,459,631,496 km 29.810 795 27 AU |
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| Aphelion | 4,536,874,325 km 30.327 131 69 AU |
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| Orbital period | 60,223.3528 d (164.88 a) |
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| Synodic period | 367.49 d | ||||||
| Avg. Orbital Speed | 5.432 km/s | ||||||
| Max. Orbital Speed | 5.479 km/s | ||||||
| Min. Orbital Speed | 5.385 km/s | ||||||
| Inclination | 1.769 17° (6.43° to Sun's equator) |
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| Longitude of the ascending node |
131.721 69° | ||||||
| Argument of the perihelion |
273.249 66° | ||||||
| Number of satellites | 13 | ||||||
| Physical characteristics | |||||||
| Equatorial diameter | 49,528 km [1] (3.883 Earths) |
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| Polar diameter | 48,681 km (3.829 Earths) |
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| Oblateness | 0.0171 | ||||||
| Surface area | 7.619×109 km2 | ||||||
| Volume | 6.254×1013 km3 (57.74 Earths) |
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| Mass | 1.0243×1026 kg (17.147 Earths) |
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| Mean density | 1.638 g/cm3 | ||||||
| Equatorial gravity (At 1 bar) |
11.15 m/s2 (1.14 g) |
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| Escape velocity | 23.5 km/s | ||||||
| Rotation period | 16.11 h (16 h 6 min 36 s) 1 | ||||||
| Rotation velocity | 2.68 km/s = 9660 km/h (at the equator) | ||||||
| Axial tilt | 28.32° | ||||||
| Right ascension of North pole |
299.33° (19 h 57 min 20 s) | ||||||
| Declination | 42.95° | ||||||
| Albedo | 0.41 | ||||||
| Surface temp. |
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| Adjective | Neptunian | ||||||
| Atmospheric characteristics | |||||||
| Surface pressure | ≫100 MPa | ||||||
| Hydrogen - H2 | 80% ±3.2% | ||||||
| Helium - He | 19% ±3.2% | ||||||
| Methane - CH4 | 1.5% ±0.5% | ||||||
| Hydrogen Deuteride - HD | 192 ppm | ||||||
| Ethane - C2H6 | 1.5 ppm | ||||||
Ti Neptuno ti maika-8 a planeta iti Sistema a Solar.
| Ti Sistema a Solar |
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| Bituen: Ti Init |
| Dagiti Planeta: Mercurio | Venus | Daga | Mars | Jupiter | Saturno | Uranus | Neptuno |
| Dagiti ansisit a planeta: Ceres - Pluto - Eris |
| Babassit a bagbagi: Dagiti asteroid - Dagiti centaurs - TNOs - Dagiti kometa - Dagiti layap |
| Dagiti satellite: Terran - Martian - Jovian - Saturnian - Uranian - Neptunian |
| Populations: Barikes nga Asteroid - Barikes a Kuiper - Naiwaris a disc - Ulep nga Oort |
| Kitaen met dagiti astronomical a bambanag ken ti listaan ti bambanag ti sistema a solar a naurnos babaen ti radius wenno ti mass. |
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Daytoy nga articulo ket maysa a pangted. Makatulongka iti Wikipedia babaen ti panangnayon wenno panangtarimaan iti daytoy nga articulo. |
