Pluto
Fram Wikipedian
| Discovery | |||||||
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| Discovered fram | Clyde W. Tombaugh | ||||||
| Discovered on | 18 Solmōnaþ, 1930 | ||||||
| Orbital characteristics (Epoch J2000) | |||||||
| Semi-major axis | 5,906,376,272 km 39.481 686 77 AU |
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| Orbital circumference | 36.530 Tm 244.186 AU |
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| Eccentricity | 0.248 807 66 | ||||||
| Perihelion | 4,436,824,613 km 29.658 340 67 AU |
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| Aphelion | 7,375,927,931 km 49.305 032 87 AU |
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| Orbital period | 90,613.3055 d (248.09 a) |
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| Synodic period | 366.73 d | ||||||
| Avg. Orbital Speed | 4.666 km/s | ||||||
| Max. Orbital Speed | 6.112 km/s | ||||||
| Min. Orbital Speed | 3.676 km/s | ||||||
| Inclination | 17.141 75° (11.88° to Sun's equator) |
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| Longitude of the ascending node |
110.303 47° | ||||||
| Argument of the perihelion |
113.763 29° | ||||||
| Rīm mōnena | 3 | ||||||
| Physical characteristics | |||||||
| Diameter | 2306±20 km (18% of Earth, or 1423±12 mi) |
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| Surface area | 1.795×107 km² (0.033 Earths) |
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| Volume | 7.15×109 km³ (0.0066 Earths) |
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| Wiht | (1.305±0.007)×1022 kg [1] (0.0021 Earths) |
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| Mean density | 2.03±0.06 g/cm³ [2] | ||||||
| Equatorial gravity | 0.58 m/s² (0.059 gee) |
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| Escape velocity | 1.2 km/s | ||||||
| Rotation period | −6.387230 d (6 d 9 h 17 m 36 s) |
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| Rotation velocity | 47.18 km/h (at the equator) | ||||||
| Axial tilt | 119.59° (to orbit) 112.78° (to the ecliptic) |
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| Right ascension of North pole |
133.045±0.02° (8 h 52 min 11 s) [3] |
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| Declination | -6.145±0.02° | ||||||
| Albedo | 0.49–0.66 (varies by 35%) [4] [5] | ||||||
| Surface temp. |
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| Tōgeīecendlic | Plutonisc | ||||||
| Atmospheric characteristics | |||||||
| Atmospheric pressure | 0.30 pascals (summer maximum) | ||||||
| Composition | nitrogen, methane | ||||||
Pluto is sum dweorgplanēta in þǣre sunnlican endebyrdnesse. Of his findunge in 1930 oþ 2006 wæs hē se nigoða planēta gehāten, ac in 2006 on 24 Wēodmōnþes, cēas sēo IAU tō eddihtenne þæt word planēta, and þus is Pluto nū dweorgplanēta gehāten.
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| Planētan: Mercurius - Venus - Eorðe - Tīw - Iupiter - Saturnus - Uranus - Neptune | |||
| Dweorgplanētan: Ceres - Pluto - Template:Mpl | |||
| Ōðer: Sunne - Se Mōna - Rūmstāngyrtel - Comets - Kuiperes gyrtel - Gestrogden disc - Oortes wolcen | |||
| Sēo ēac tungollicu þing and sēo sunnlicre endebyrdnesse getalu þinga, gedihted be ymbhringe oþþe wihte. |
