Orbital characteristics (Epoch J2000)
Characteristic Mercury Venus Earth, Terra, Tellis Mars Jupiter Saturn Uranus Neptune Pluto
Semimajor axis (km) 57,909,176 km 108,208,926 km 149,597,887 km 227,936,637 km 778,412,027 km 1,426,725,413 km 2,870,972,220 km 4,498,252,900 km 5,906,376,272 km
Semimajor axis (AU) 0.387 098 93 AU 0.723 331 99 AU 1.00000011 AU 1.523 662 31 AU 5.203 363 01 AU 9.537 070 32 AU 19.191 263 93 AU 30.068 963 48 AU 39.481 686 77 AU
Orbital circumference (Tm 0.360 Tm 0.680 Tm 0.940 Tm 1.429 Tm 4.888 Tm 8.958 Tm 18.029 Tm 28.263 Tm 36.530 Tm
Orbital circumference (AU) 2.406 AU 4.545 AU 6.283 AU 9.553 AU 32.675 AU 59.879 AU 120.515 AU 188.925 AU 244.186 AU
Eccentricity 0.205 630 69 0.006 773 23 0.01671022 0.093 412 33 0.048 392 66 0.054 150 60 0.047 167 71 0.008 585 87 0.248 807 66
Perihelion (km) 46,001,272 km 107,476,002 km 147,098,074 km 206,644,545 km 740,742,598 km 1,349,467,375 km 2,735,555,035 km 4,459,631,496 km 4,436,824,613 km
Perihelion (AU) 0.307 499 51 AU 0.718 432 70 AU 0.9832899 AU 1.381 333 46 AU 4.951 558 43 AU 9.020 632 24 AU 18.286 055 96 AU 29.810 795 27 AU 29.658 340 67 AU
Apehelion (km) 69,817,079 km 108,941,849 km 152,097,701 km 249,228,730 km 816,081,455 km 1,503,983,449 km 3,006,389,405 km 4,536,874,325 km 7,375,927,931 km
Apehelion (AU) 0.466 698 35 AU 0.728 231 28 AU 1.0167103 AU 1.665 991 16 AU 5.455 167 59 AU 10.053 508 40 AU 20.096 471 90 AU 30.327 131 69 AU 49.305 032 87 AU
Orbital period (days) 87.969 36 d 224.701 51 d 365.258 06 d 686.9603 d 4339.4930 d 10,760.8112 d 30,709.5006 d 60,228.0052 d 90,613.3064 d
Orbital period (Julian years) 0.240 847 0 a 0.615 199 2 a 1.0000221 a 1.8808 a 11.88 a 29.46 a 84.08 a 164.90 a 248.09 a
Synodic period 115.8775 d 583.92 d n/a 779.96 d 398.83 d 378.09 d 369.65 d 367.49 d 366.74 d
Avg. Orbital Speed (km/s) 47.36 km/s 35.020 km/s 29.783 km/s 24.077 km/s 13.037 km/s 9.635 km/s 6.795 km/s 5.431 km/s 4.666 km/s
Max. Orbital Speed (km/s) 58.98 km/s 35.259 km/s 30.287 km/s 26.499 km/s 13.692 km/s 10.179 km/s 7.127 km/s 5.478 km/s 6.112 km/s
Min. Orbital Speed (km/s) 38.86 km/s 34.784 km/s 29.291 km/s 21.972 km/s 12.428 km/s 9.133 km/s 6.485 km/s 5.385 km/s 3.676 km/s
Inclination 7.004 87° 3.394 71° 0.000 05° 1.850 61° 1.305 30° 2.484 46° 0.769 86° 1.769 17° 17.141 75°
Inclination to Sun's equator 3.38° 3.86° 7.25° 5.65° 6.09° 5.51° 6.48° 6.43° 11.88°
Longitude of the
ascending node
48.331 67° 76.680 69° 348.73936° 49.578 54° 100.556 15° 113.715 04° 74.229 88° 131.721 69° 110.303 47°
Argument of the
perihelion
29.124 78° 54.852 29° 114.20783° 286.462 30° 274.197 70° 338.716 90° 96.734 36° 273.249 66° 113.763 29°
Number of satellites 0 0 1 2 63 49-55 27 13 1
Physical characteristics
Equatorial diameter 4879.4 km 12,103.7 km 12,756.270 km 6,804.9 km 142,984 km 120,536 km 51,118 km 49,528 km 2,390 km
Equatorial diameter (Earths) 0.383 Earths 0.949 Earths 1 Earth 0.533 Earths 11.209 Earths 9.449 Earths 4.007 Earths 3.883 Earths 0.188 Earths
Surface area (km²) 7.5 × 107 km² 4.60×108 km² 510,065,284.702 km² 1.448×108 km2 6.14×1010 km2 4.27×1010 km2 8.084×109 km2 7.619×109 km2 1.795×107 km2
Surface area (Earths) 0.147 Earths 0.902 Earths 1 Earth 0.284 Earths 120.5 Earths 83.703 Earths 15.849 Earths -- 0.033 Earths
Volume (km³) 6.1 × 1010 km³ 9.28 × 1011 km³ 1.0832 × 1012 km³ 1.638×1011 km3 1.338×1015 km3 7.46×1014 km3 6.834×1013 km3 6.254×1013 km3 7.15×109 km3
Volume (Earths) 0.056 Earths 0.857 Earths 1 Earth 0.151 Earths 1235.6 Earths 688.79 Earths 63.086 Earths 57.74 Earths 0.0066 Earths
Mass (kg) 3.302 × 1023 kg 4.8685 × 1024 kg 5.9736 × 1024 kg 6.4185×1023 kg 1.899×1027 kg 5.6846×1026 kg 8.6832×1025 kg 1.0243×1026 kg 1.25×1022 kg
Mass (Earths) 0.055 Earths 0.815 Earths 1 Earth 0.107 Earths 317.8 Earths 95.162 Earths 14.536 Earths 17.147 Earths 0.0021 Earths
Mean density 5.427 g/cm³ 5.204 g/cm³ 5.515 g/cm³ 3.934 g/cm³ 1.326 g/cm³ 0.6873 g/cm³ 1.318 g/cm³ 1.638 g/cm³ 1.750 g/cm³
Equatorial gravity (m/s²) 3.701 m/s² 8.87 m/s² 9.780 m/s² 3.69 m/s² 23.12 m/s² 8.96 m/s² 8.69 m/s² 11.15 m/s² 0.58 m/s2
Equatorial gravity (gee) 0.377 gee 0.904 gee 0.99732 g 0.376g 2.358 g 0.914 g 0.886 g 1.14 g 0.059 g
Escape velocity 4.435 km/s 10.36 km/s 11.186 km/s 5.027 km/s 59.54 km/s 35.49 km/s 21.29 km/s 23.5 km/s 1.2 km/s
Rotation period (days 58.6462 d (58 d 15.5088 h) -243.0185 d 0.997258 d (23.934 h) 1.025 957 d (24.622 962 h) 0.413 538 021 d (9 h 55 min 29.685 s) 0.444 009 259 2 d (10 h 39 min 22.400 00 s) 0.718 333 333 d (17 h 14 min 24.000 00 s) 16.11 h (16 h 6 min 36 s) 6.387 d (6 d 9 h 17.6 min)
Rotation velocity (at the equator) 10.892 km/h 6.52 km/h 465.11 m/s 868.22 km/h 12.6 km/s = 45,300 km/h 9.87 km/s = 35,500 km/h 2.59 km/s = 9320 km/h 2.68 km/s = 9660 km/h 47.18 km/h
Axial tilt ~0.01° 2.64° 23.439281° 25.19° 3.13° 97.77° -- 28.32° 122.54°
Right ascension
of North pole 1
281.01° (18 h 44 min 2 s) 272.76° (18 h 11 min 2 s) 0° (0 h 0 min 0 s) 317.681 43° (21 h 10 min 44 s) 268.057deg; (17 h 52 min 12 s) 40.59° (2 h 42 min 21 s) 77.31° (5 h 9 min 15 s) 299.33° (19 h 57 min 20 s) 133.02° (8 h 52 min 5 s)
Declination 61.45° 67.16° 90° 52.886° 64.49° 83.54° 15.175° 42.95° -9.09°
Albedo 0.10-0.12 0.65 0.367 0.15 0.52 0.47 0.51 0.41 0.30
Adjective Mercurian Venusian or (rarely) Cytherean Terrestrial Martian Jovian Saturnian Uranian Neptunian Plutonian
Min. Surface temp. (K) 90 K 228 K 185 K 133 K 110 K 82 K 59 K 50 K 33 K
Mean Surface temp. (K) 440 K 737 K 287 K 210 K 152 K 143 K 68 K 53 K 44 K
Max. Surface temp. (K) 700 K 773 K 331 K 293 K N/A K N/A K N/A K N/A K 55 K
Atmospheric pressure trace 9.3 MPa 100 kPa 0.7-0.9 kPa 70 kPa 140 kPa 120 kPa (at the cloud level) ≫100 MPa 0.15-0.30 pascals