Bysen:Planet Infobox/Pluto
| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| 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 | ||||||
| Orbital circumference | 36.530 Tm 244.186 AU | ||||||
| Eccentricity | 0.248 807 66 | ||||||
| Perihelion | 4,436,824,613 km 29.658 340 67 AU | ||||||
| Aphelion | 7,375,927,931 km 49.305 032 87 AU | ||||||
| Orbital period | 90,613.3055 d (248.09 a) | ||||||
| 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) | ||||||
| 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) | ||||||
| Surface area | 1.795×107 km² (0.033 Earths) | ||||||
| Volume | 7.15×109 km³ (0.0066 Earths) | ||||||
| Wiht | (1.305±0.007)×1022 kg [1] (0.0021 Earths) | ||||||
| Mean density | 2.03±0.06 g/cm³ [2] | ||||||
| Equatorial gravity | 0.58 m/s² (0.059 gee) | ||||||
| Escape velocity | 1.2 km/s | ||||||
| Rotation period | −6.387230 d (6 d 9 h 17 m 36 s) | ||||||
| Rotation velocity | 47.18 km/h (at the equator) | ||||||
| Axial tilt | 119.59° (to orbit) 112.78° (to the ecliptic) | ||||||
| Right ascension of North pole |
133.045±0.02° (8 h 52 min 11 s) [3] | ||||||
| Declination | -6.145±0.02° | ||||||
| Albedo | 0.49–0.66 (varies by 35%) [4] [5] | ||||||
| Surface temp. |
| ||||||
| Tōgeīecendlic | Plutonisc | ||||||
| Atmospheric characteristics | |||||||
| Atmospheric pressure | 0.30 pascals (summer maximum) | ||||||
| Composition | nitrogen, methane | ||||||
