Murcury

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Taken from: Wikipedia

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Designations
Adjective	Mercurian, Mercurial[1]
Orbital characteristics[4]
Epoch J2000
Aphelion	69,816,900 km 0.466 697 AU
Perihelion	46,001,200 km 0.307 499 AU
Semi-major axis	57,909,100 km 0.387 098 AU
Eccentricity	0.205 630[2]
Orbital period	87.969 1 d (0.240 846 a) 0.5 Mercury solar day
Synodic period	115.88 d[2]
Average orbital speed	47.87 km/s[2]
Mean anomaly	174.796°
Inclination	7.005° to Ecliptic 3.38° to Sun's equator 6.34° to Invariable plane[3]
Longitude of ascending node	48.331°
Argument of perihelion	29.124°
Satellites	None
Physical characteristics
Mean radius	2,439.7 ± 1.0 km[5][6] 0.3829 Earths
Flattening	0[6]
Surface area	7.48×107 km2[5] 0.147 Earths
Volume	6.083×1010 km3[5] 0.056 Earths
Mass	3.3022×1023 kg[5] 0.055 Earths
Mean density	5.427 g/cm3[5]
Equatorial surface gravity	3.7 m/s2 0.38 g[5]
Escape velocity	4.25 km/s[5]
Sidereal rotation period	58.646 day 1407.5 h[5]
Equatorial rotation velocity	10.892 km/h (3.026 m/s)
Axial tilt	2.11′ ± 0.1′[7]
North pole right ascension	18 h 44 min 2 s 281.01°[2]
North pole declination	61.45°[2]
Albedo	0.068 (Bond)[8] 0.142 (geom.)[8]
Surface temp. min mean max 0°N, 0°W [11] 100 K 340 K 700 K 85°N, 0°W[11] 80 K 200 K 380 K
Apparent magnitude	−2.6[9] to 5.7[2][10]
Angular diameter	4.5" – 13"[2]
Atmosphere[2]
Surface pressure	trace
Composition	42% Molecular oxygen 29.0% sodium 22.0% hydrogen 6.0% helium 0.5% potassium Trace amounts of argon, nitrogen, carbon dioxide, water vapor, xenon, krypton, and neon