The nature of the orbit [1]
The beginning J2000
long-term point
perihelion:
249.23. Million km
(1.6660 AU),
the distance near
perihelion:
206.62. Million km
(1.3814 AU)
semi-major axis:
227 939 100. Kilometers
(1.523679 AU)
circumference
of the orbit: Pour the 1.429 meters
(9.553. AU)
Eccentricity: 0.0935 ± 0.0001
orbital period:
Date 686.971
668.5991 solar days
(1.8808. Julian years),
periodic acid Nordic:
779.94 days
(2.135 Julian year)
average speed
in orbit:
24.077. Km / s
maximum speed
in orbit:
26.499. Km / s
minimum speed
in orbit:
21.972. Km / s
mean anomaly: 19.3564 degrees (°)
Inclination:
1.850 ° to the ecliptic
5.65 ° to the equator, the sun
1.67 ° to the plane fixed [2]
longitude
of the ascending node: 49.562 °
phase angle.
perihelion: 286.537 °
moons of the sun
of satellites: two
physical
radius average:
3,389.5 ± 0.2 kilometers [a] [3]
radius along the equator:
3396.2 ± 0.1 kilometers [a] [3].
(0.533 times that of Earth)
terminals along the radius:
3,376.2 ± 0.1 kilometers [a] [3]
(0.531 times that of Earth)
the key: 0.00589 ± 0.00015
surface area:
144 798 500. Square kilometers
(0.284 Much of the world)
Volume:
1.6318 × 1,011th. Km. ³ [4]
(0.151. Times that of Earth)
Mass:
the 1,023th × 6.4185. Kg [4]
(.107 Much of the world),
average density: 3.9335 ± 0.0004. G / cm. ³ [4]
gravity
at the equator: 3.711 m / s ² [4]
0.376. G
ratio of the moment of inertia: 0.3662 ± 0.0017 [5]
Escape velocity: 5.027 km / s
periodic rotation
around its own:
1.025957. Day
(24 hours 37 minutes 22 seconds) [4],
the speed of rotation
around its own:
868.22. / Km
241.17 m / s (at the equator)
axial tilt: 25.19 ° to the orbital plane [6]
right ascension
of north pole:
317.68143 °
(21 hours 10 minutes 44 seconds)
Declination. Buchan
's north pole: 52.88650 °
reflective ratio:
0.170. Geometry [7]
.25 Bond [6]
surface temperature:
Kelvin
Celsius
, minimum, average, maximum
130 K 210 K [6] 308 K
-143 ° C [8] -63 ° C 35 ° C [9]
Apparent magnitude: +1.6 [10. ] to -2.91 [6]
angular diameter: 3.5 to 25.1, "[6]
the nature of atmospheric
pressure
at the surface:
0.636. KPa
(ranging from 0.4 to 0.87) [6] [11]
Composition:
95.97% carbon dioxide,
1.93% argon,
1.89% nitrogen,
0.146% oxygen
0.0557% carbon monoxide
0.0210% steam
0.0100% nitric oxide,
0.0015% hydrogen molecules [12].
0.00025% neon
.0000850% HDO
% krypton 0.0000300
0.0000130% formaldehyde
xenon 0.0000080%
0.0000030% ozone
0.0000018% H2O2 [13]
0.0000010% methane [14].
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