 Venus in real color | ||||||||||
| Designations | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Adjective | Venusian or (rarely) Cytherean, Venerean | |||||||||
| Epoch J2000 | ||||||||||
| Aphelion | 108,942,109 km 0.728 231 28 AU | |||||||||
| Perihelion | 107,476,259 km 0.718 432 70 AU | |||||||||
| Semi-major axis | 108,208,930 km 0.723 332 AU | |||||||||
| Eccentricity | 0.006 8 | |||||||||
| Orbital period | 224.700 69 day 0.615 197 0 yr | |||||||||
| Synodic period | 583.92 days[1] | |||||||||
| Average orbital speed | 35.02 km/s | |||||||||
| Inclination | 3.394 71° 3.86° to Sun's equator | |||||||||
| Longitude of ascending node | 76.670 69° | |||||||||
| Argument of perihelion | 54.852 29° | |||||||||
| Satellites | None | |||||||||
| Physical characteristics | ||||||||||
| Mean radius | 6 051.8 ± 1.0 km[2] 0.949 9 Earths | |||||||||
| Flattening | < id="cite_ref-Seidelmann2007_1-1" class="reference">[2] | |||||||||
| Surface area | 4.60×108 km² 0.902 Earths | |||||||||
| Volume | 9.38×1011 km³ 0.857 Earths | |||||||||
| Mass | 4.868 5×1024 kg 0.815 Earths | |||||||||
| Mean density | 5.204 g/cm³ | |||||||||
| Equatorial surface gravity | 8.87 m/s2 0.904 g | |||||||||
| Escape velocity | 10.46 km/s | |||||||||
| Sidereal rotation period | 243.018 5 day | |||||||||
| Equatorial rotation velocity | 6.52 km/h (1.81 m/s) | |||||||||
| Axial tilt | 177.3°[1] | |||||||||
| North pole right ascension | 18 h 11 min 2 s 272.76°[3] | |||||||||
| North pole declination | 67.16° | |||||||||
| Albedo | 0.65[1] | |||||||||
| Surface temp. Kelvin Celsius |
| |||||||||
| Apparent magnitude | up to -4.6[1] | |||||||||
| Angular diameter | 9.7" — 66.0"[1] | |||||||||
| Atmosphere | ||||||||||
| Surface pressure | 9.3 MPa | |||||||||
| Composition | ~96.5% Carbon dioxide ~3.5% Nitrogen 0.015% Sulfur dioxide 0.007% Argon 0.002% Water vapor 0.001 7% Carbon monoxide 0.001 2% Helium 0.000 7% Neon trace Carbonyl sulfide trace Hydrogen chloride trace Hydrogen fluoride | |||||||||
Jumat, 30 Januari 2009
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