User:Amit6/infmercuryp
 MESSENGER false color image of Mercury | |||||||||||||
| Designations | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adjectives | Mercurian, Mercurial[1] | ||||||||||||
| Symbol |  | ||||||||||||
| Orbital characteristics[2] | |||||||||||||
| Epoch J2000 | |||||||||||||
| Aphelion | 69,816,900 km 0.466 697 AU | ||||||||||||
| Perihelion | 46,001,200 km 0.307 499 AU | ||||||||||||
| 57,909,100 km 0.387 098 AU | |||||||||||||
| Eccentricity | 0.205 630[3] | ||||||||||||
| 87.969 1 d (0.240 846 a) | |||||||||||||
| 115.88 d[3] | |||||||||||||
Average orbital speed | 47.87 km/s[3] | ||||||||||||
| 174.796° | |||||||||||||
| Inclination | 7.005° to Ecliptic 3.38° to Sun’s equator 6.34° to Invariable plane[4] | ||||||||||||
| 48.331° | |||||||||||||
| 29.124° | |||||||||||||
| Known satellites | None | ||||||||||||
| Physical characteristics | |||||||||||||
Mean radius | 2,439.7 ± 1.0 km[5][6] 0.3829 Earths | ||||||||||||
| Flattening | < 0.0006[6] | ||||||||||||
| 7.48×107 km² 0.108 Earths[5] | |||||||||||||
| Volume | 6.083×1010 km³ 0.054 Earths[5] | ||||||||||||
| Mass | 3.3022×1023 kg 0.055 Earths[5] | ||||||||||||
Mean density | 5.427 g/cm³[5] | ||||||||||||
| 3.7 m/s² 0.38 g[5] | |||||||||||||
| 4.25 km/s[5] | |||||||||||||
| 58.646 day 1407.5 h[5] | |||||||||||||
Equatorial rotation velocity | 10.892 km/h (3.026 m/s) | ||||||||||||
| 2.11′ ± 0.1′[7] | |||||||||||||
North pole right ascension | 18 h 44 min 2 s 281.01°[3] | ||||||||||||
North pole declination | 61.45°[3] | ||||||||||||
| Albedo | 0.119 (bond) 0.106 (geom.)[3] | ||||||||||||
| |||||||||||||
| up to −1.9[3] | |||||||||||||
| 4.5" – 13"[3] | |||||||||||||
| Atmosphere | |||||||||||||
Surface pressure | trace | ||||||||||||
| Composition by volume | 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, & neon[3] | ||||||||||||
- ^ "mercurial". Merriam-Webster Online. Retrieved 2008-06-12.
- ^ Yeomans, Donald K. (April 7, 2008). "HORIZONS System". NASA JPL. Retrieved 2008-04-07.
{{cite web}}: Check date values in:|date=(help) - ^ a b c d e f g h i "Mercury Fact Sheet". NASA Goddard Space Flight Center. November 30, 2007. Retrieved 2008-05-28.
{{cite web}}: Check date values in:|date=(help) - ^ "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". 2009-04-03. Retrieved 2009-04-03. (produced with Solex 10 written by Aldo Vitagliano; see also Invariable plane)
- ^ a b c d e f g h Munsell, Kirk (February 25, 2008). "Mercury: Facts & Figures". Solar System Exploration. NASA. Retrieved 2008-04-07.
{{cite web}}: Check date values in:|date=(help); Unknown parameter|coauthors=ignored (|author=suggested) (help) - ^ a b Seidelmann, P. Kenneth; Archinal, B. A.; a'Hearn, M. F.; Conrad, A.; Consolmagno, G. J.; Hestroffer, D.; Hilton, J. L.; Krasinsky, G. A.; Neumann, G.; Oberst, J.; Stooke, P.; Tedesco, E. F.; Tholen, D. J.; Thomas, P. C.; Williams, I. P. (2007). "Report of the IAU/IAGWorking Group on cartographic coordinates and rotational elements: 2006". Celestial Mechanics and Dynamical Astronomy. 90 (3): 155–180. doi:10.1007/s10569-007-9072-y. Retrieved 2007-08-28.
{{cite journal}}: CS1 maint: date and year (link) - ^ Margot, J. L.; Peale, S. J.; Jurgens, R. F.; Slade, M. A.; Holin, I. V. (2007). "Large Longitude Libration of Mercury Reveals a Molten Core". Science. 316 (5825): 710–714. Bibcode:2007Sci...316..710M. doi:10.1126/science.1140514. PMID 17478713.
{{cite journal}}: CS1 maint: date and year (link)
