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Mercury
From Anarchopedia
| This article contains content from Wikipedia. Current versions of the GNU FDL article Mercury on WP may contain information useful to the improvement of this article | WP |
| http://upload.wikimedia.org/wikipedia/en/thumb/8/88/Reprocessed_Mariner_10_image_of_Mercury.jpg/300px-Reprocessed_Mariner_10_image_of_Mercury.jpg | |||||||
| Orbital characteristics (Epoch J2000) | |||||||
|---|---|---|---|---|---|---|---|
| Avg. distance from Sun | 57,909,176 km 0.387 098 93 AU | ||||||
| Orbital circumference | 360,000,000 km (2.406 AU) | ||||||
| Eccentricity | 0.205 630 69 | ||||||
| Perihelion | 46,001,272 km 0.307 499 51 AU | ||||||
| Aphelion | 69,817,079 km 0.466 698 35 AU | ||||||
| Orbital period | 87.969 34 d (0.240 846 9 a) | ||||||
| Synodic period | 115.8776 d | ||||||
| Avg. Orbital Speed | 47.36 km/s | ||||||
| Max. Orbital Speed | 58.98 km/s | ||||||
| Min. Orbital Speed | 38.86 km/s | ||||||
| Inclination | 7.004 87° (3.38° to Sun's equator) | ||||||
| Longitude of the ascending node |
48.331 67° | ||||||
| Argument of the perihelion |
29.124 78° | ||||||
| Number of satellites | 0 | ||||||
| Physical characteristics | |||||||
| Equatorial diameter | 4879.4 km (0.383 Earths) | ||||||
| Surface area | 7.5Template:e km² (0.147 Earths) | ||||||
| Volume | 6.083Template:e km³ (0.056 Earths) | ||||||
| Mass | 3.302Template:e kg (0.055 Earths) | ||||||
| Mean density | 5.427 g/cm³ | ||||||
| Equatorial gravity | 3.701 m/s² (0.377 gee) | ||||||
| Escape velocity | 4.435 km/s | ||||||
| Rotation period | 58.6462 d (58 d 15.5088 h) | ||||||
| Rotation velocity | 10.892 km/h (at the equator) | ||||||
| Axial tilt | ~0.01° | ||||||
| Right ascension of North pole |
281.01° (18 h 44 min 2 s) 1 | ||||||
| Declination | 61.45° | ||||||
| Albedo | 0.10-0.12 | ||||||
| Surface temp. |
| ||||||
| Avg. Surface temp.: Day | 623 K | ||||||
| Avg. Surface temp.: Night | 103 K | ||||||
| Adjective | Mercurian | ||||||
| Atmospheric characteristics | |||||||
| Atmospheric pressure | trace | ||||||
| Potassium | 31.7% | ||||||
| Sodium | 24.9% | ||||||
| Atomic Oxygen | 9.5% | ||||||
| Argon | 7.0% | ||||||
| Helium | 5.9% | ||||||
| Molecular Oxygen | 5.6% | ||||||
| Nitrogen | 5.2% | ||||||
| Carbon dioxide | 3.6% | ||||||
| Water | 3.4% | ||||||
| Hydrogen | 3.2% | ||||||
- For the chemical element, see mercury.
Mercury is the first planet from the sun.
