2008 EA9
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| Mercury | |
|---|---|
| |
| Mercury in Orbiter | |
| Designation | |
| Name | Mercury |
| Reference body | Sun |
| Number of satellites | 0 |
| Planetary mean orbits | |
| Epoch | J2000 (1 January 2000) |
| Semimajor axis (a) | 0.38709893 AU 5.790917567×107 km) |
| Eccentricity (e) | 0.20563069 |
| Inclination (i) | 7.00487° (0.122258 radian) |
| Longitude of the ascending node (LAN, ☊) | 48.33167° (0.8436468 radian) |
| Longitude of periapsis (ϖ) | 77.45645° (1.351870 radian) |
| Mean longitude (L) | 252.25084° (4.402608 radian) |
| Planetary orbital element centennial rates | |
| Semimajor axis (a) | 0.00000066 AU/Century |
| Eccentricity (e) | 0.00002527 Century-1 |
| Inclination (i) | -23.51 seconds/Century |
| Longitude of the ascending node (LAN, ☊) | -446.30 seconds/Century |
| Longitude of periapsis (ϖ) | 573.57 seconds/Century |
| Mean longitude (L) | 538101628.29 seconds/Century |
| Selected physical parameters | |
| Mean radius | 2440 km |
| Mass | 3.301880×1023 kg |
| Density | 5.427 g/cm3 |
| Sidereal rotation period | 1407.509 hours |
| Sidereal orbit period | 0.2408445 years |
| Magnitude V(1,0) | -0.42 |
| Geometric albedo | 0.106 |
| Equatorial gravity | 3.701 m/s2 |
| Escape velocity | 4.435 km/s |
| SOI radius (estimated) | 28385 km |
| Rotation elements | |
| North pole right ascension (α1) | 280.99° |
| North pole declination (δ1) | 61.44° |
| Obliquty of ecliptic | 7.01° |
| Longitude of Sun's transit | 228.31° |
| Note | *Elements given are from Orbiter.pdf (2016) |