Difference between revisions 6283231 and 6283460 on srwiki


xxxx'''Mercury'''{{subst:Autobot/sandbox4 | ime = Mercury
Bulk parameters

                                   Mercury        Earth      Ratio (Mercury/Earth)
| Mass (1024 kg) =                     0.3302
| Volume (1010 km3) =                  6.083
| Equatorial radius (km)	 =           2439.7
| Polar radius (km) =                  2439.7
| Volumetric mean radius (km) =        2439.7
| Ellipticity (Flattening) =           0.0000
| Mean density (kg/m3) =               5427
| Surface gravity (eq.) (m/s2) =       3.70
| Surface acceleration (eq.) (m/s2) =  3.70
| Escape velocity (km/s) =             4.3
| GM (x 106 km3/s2) =                  0.02203
| Bond albedo =                        0.068
| Visual geometric albedo =            0.142
| Visual magnitude V(1,0) =           -0.42         -3.86         -  
| Solar irradiance (W/m2) =            9126.6
| Black-body temperature (K) =          440.1
| Moment of inertia (I/MR2) =          0.33
| J2 (x 10-6) =                         60.
Number of natural satellites           0             1
Planetary ring system                 No            No

Orbital parameters

                                   Mercury        Earth      Ratio (Mercury/Earth)
| Semimajor axis (106 km) =            57.91
| Sidereal orbit period (days) =       87.969
| Tropical orbit period (days) =       87.968
| Perihelion (106 km) =                46.00
| Aphelion (106 km) =                  69.82
Synodic period (days)              115.88          -            -     
| Mean orbital velocity (km/s) =       47.87
| Max. orbital velocity (km/s) =       58.98
| Min. orbital velocity (km/s) =       38.86
| Orbit inclination (deg) =             7.00          0.00         -   
| Orbit eccentricity =                  0.2056
| Sidereal rotation period (hrs) =   1407.6
| Length of day (hrs) =              4222.6
| Obliquity to orbit (deg) =           ~0

Mercury Observational Parameters

Discoverer:      Unknown
Discovery Date:  Prehistoric

Distance from Earth
        Minimum (106 km)            77.3
        Maximum (106 km)           221.9
Apparent diameter from Earth
        Maximum (seconds of arc)    13.
        Minimum (seconds of arc)     4.5
Maximum visual magnitude            -1.9      
Mean values at inferior conjunction with Earth
        Distance from Earth (106 km)         91.70    
        Apparent diameter (seconds of arc)   11.0

Mercury Mean Orbital Elements (J2000)

Semimajor axis (AU)                  0.38709893  
Orbital eccentricity                 0.20563069   
Orbital inclination (deg)            7.00487    
Longitude of ascending node (deg)   48.33167     
Longitude of perihelion (deg)       77.45645  
Mean Longitude (deg)               252.25084 

North Pole of Rotation

Right Ascension: 281.01 - 0.003T
Declination    :  61.45 - 0.005T
Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)
T = Julian centuries from reference date 

xxxx'''Venus'''{{subst:Autobot/sandbox4 | ime = Venus
Bulk parameters

                                   Venus          Earth     Ratio (Venus/Earth)
| Mass (1024 kg) =                     4.8685
| Volume (1010 km3) =                 92.843
| Equatorial radius (km)	 =          6051.8
| Polar radius (km) =                 6051.8
| Volumetric mean radius (km) =       6051.8
| Ellipticity (Flattening) =           0.000
| Mean density (kg/m3) =              5243
| Surface gravity (eq.) (m/s2) =       8.87
| Surface acceleration (eq.) (m/s2) =  8.87
| Escape velocity (km/s) =            10.36
| GM (x 106 km3/s2) =                  0.3249
| Bond albedo =                        0.90
| Visual geometric albedo =            0.67
| Visual magnitude V(1,0) =           -4.40          -3.86             -
| Solar irradiance (W/m2) =           2613.9
| Black-body temperature (K) =         184.2
| Topographic range (km) =              15
| Moment of inertia (I/MR2) =          0.33
| J2 (x 10-6) =                        4.458
Number of natural satellites          0              1
Planetary ring system                No             No

Orbital parameters

                                   Venus           Earth     Ratio (Venus/Earth)
| Semimajor axis (106 km) =          108.21
| Sidereal orbit period (days) =     224.701
| Tropical orbit period (days) =     224.695
| Perihelion (106 km) =              107.48
| Aphelion (106 km) =                108.94
Synodic period (days)             583.92            -               -
| Mean orbital velocity (km/s) =      35.02
| Max. orbital velocity (km/s) =      35.26
| Min. orbital velocity (km/s) =      34.79
| Orbit inclination (deg) =            3.39            0.00            -
| Orbit eccentricity =                 0.0067
| Sidereal rotation period (hrs) = -5832.5
| Length of day (hrs) =             2802.0
| Obliquity to orbit (deg) =         177.36

Venus Observational Parameters

Discoverer:      Unknown
Discovery Date:  Prehistoric

Distance from Earth
        Minimum (106 km)            38.2
        Maximum (106 km)           261.0
Apparent diameter from Earth
        Maximum (seconds of arc)    66.0
        Minimum (seconds of arc)     9.7
Maximum visual magnitude            -4.6
Mean values at inferior conjunction with Earth
        Distance from Earth (106 km)         41.44    
        Apparent diameter (seconds of arc)   60.2

Venus Mean Orbital Elements (J2000)

Semimajor axis (AU)                  0.72333199  
Orbital eccentricity                 0.00677323   
Orbital inclination (deg)            3.39471   
Longitude of ascending node (deg)   76.68069  
Longitude of perihelion (deg)      131.53298  
Mean Longitude (deg)               181.97973

North Pole of Rotation

Right Ascension: 272.76
Declination    :  67.16
Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)

xxxx'''Moon'''{{subst:Autobot/sandbox4 | ime = Moon
Bulk parameters

                                   Moon         Earth      Ratio (Moon/Earth)
| Mass (1024 kg) =                   0.07349
| Volume (1010 km3) =                2.1958
| Equatorial radius (km)	 =          1738.1
| Polar radius (km) =                 1736.0
| Volumetric mean radius (km) =       1737.1
| Ellipticity (Flattening) =         0.0012
| Mean density (kg/m3) =              3350
| Surface gravity (m/s2) =           1.62
| Surface acceleration (m/s2) =      1.62
| Escape velocity (km/s) =           2.38
| GM (x 106 km3/s2) =                0.0049
| Bond albedo =                      0.11
| Visual geometric albedo =          0.12
| Visual magnitude V(1,0) =         +0.21         -3.86          -
| Solar irradiance (W/m2) =           1367.6
| Black-body temperature (K) =         270.7
| Topographic range (km) =              16
| Moment of inertia (I/MR2) =        0.394
| J2 (x 10-6) =                    202.7

Orbital parameters (for orbit about the Earth)

                                    Moon         
Semimajor axis (106 km)             0.3844                 
Perigee (106 km)*                   0.3633
Apogee (106 km)*                    0.4055
Revolution period (days)           27.3217            
Synodic period (days)              29.53               
Mean orbital velocity (km/s)        1.023                  
Max. orbital velocity (km/s)        1.076
Min. orbital velocity (km/s)        0.964
Inclination to ecliptic (deg)       5.145
Inclination to equator (deg)       18.28 - 28.58                    
Orbit eccentricity                  0.0549              
Sidereal rotation period (hrs)    655.728                
Obliquity to orbit (deg)            6.68                   
Recession rate from Earth (cm/yr)   3.8

Mean values at opposition from Earth
        Distance from Earth (equator, km)   378,000    
        Apparent diameter (seconds of arc)     1896
        Apparent visual magnitude               -12.74     

xxxx'''Mars'''{{subst:Autobot/sandbox4 | ime = Mars
Bulk parameters

                                   Mars           Earth     Ratio (Mars/Earth)
| Mass (1024 kg) =                    0.64185
| Volume (1010 km3) =                16.318
| Equatorial radius (km)	 =          3396.2
| Polar radius (km) =                 3376.2
| Volumetric mean radius (km) =       3389.5
| Core radius (km) =                  1700
| Ellipticity (Flattening) =          0.00589
| Mean density (kg/m3) =              3933
| Surface gravity (m/s2) =            3.71
| Surface acceleration (m/s2) =       3.69
| Escape velocity (km/s) =            5.03
| GM (x 106 km3/s2) =                 0.04283
| Bond albedo =                       0.250
| Visual geometric albedo =           0.170
| Visual magnitude V(1,0) =          -1.52           -3.86             -
| Solar irradiance (W/m2) =         589.2
| Black-body temperature (K) =      210.1
| Topographic range (km) =              30
| Moment of inertia (I/MR2) =         0.366
| J2 (x 10-6) =                    1960.45
Number of natural satellites          2              1
Planetary ring system                No             No

Orbital parameters

                                   Mars           Earth     Ratio (Mars/Earth)
| Semimajor axis (106 km) =         227.92
| Sidereal orbit period (days) =    686.980
| Tropical orbit period (days) =    686.973
| Perihelion (106 km) =             206.62
| Aphelion (106 km) =               249.23
Synodic period (days)            779.94             -               -
| Mean orbital velocity (km/s) =     24.13
| Max. orbital velocity (km/s) =     26.50
| Min. orbital velocity (km/s) =     21.97
| Orbit inclination (deg) =           1.850           0.000            -
| Orbit eccentricity =                0.0935
| Sidereal rotation period (hrs) =   24.6229
| Length of day (hrs) =              24.6597
| Obliquity to orbit (deg) =         25.19

Mars Observational Parameters

Discoverer:      Unknown
Discovery Date:  Prehistoric

Distance from Earth
        Minimum (106 km)           55.7
        Maximum (106 km)          401.3
Apparent diameter from Earth
        Maximum (seconds of arc)   25.1
        Minimum (seconds of arc)    3.5
Mean values at opposition from Earth
        Distance from Earth (106 km)         78.39    
        Apparent diameter (seconds of arc)   17.9
        Apparent visual magnitude            -2.0
Maximum apparent visual magnitude            -2.91      

Mars Mean Orbital Elements (J2000)

Semimajor axis (AU)                  1.52366231  
Orbital eccentricity                 0.09341233   
Orbital inclination (deg)            1.85061   
Longitude of ascending node (deg)   49.57854  
Longitude of perihelion (deg)      336.04084   
Mean Longitude (deg)               355.45332

North Pole of Rotation

Right Ascension: 317.681 - 0.106T
Declination    :  52.887 - 0.061T
Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)

xxxx'''Jupiter'''{{subst:Autobot/sandbox4 | ime = Jupiter
Bulk parameters

                                   Jupiter      Earth   Ratio (Jupiter/Earth)
| Mass (1024 kg) =                     1,898.6
| Volume (1010 km3) =                143,128
Radius (1 bar level) (km)
|  =   Equatorial                     71,492
|  =   Polar                          66,854
| Volumetric mean radius (km) =       69,911
| Ellipticity =                        0.06487
| Mean density (kg/m3) =               1,326
| Gravity (eq., 1 bar) (m/s2) =       24.79
| Acceleration (eq., 1 bar) (m/s2) =  23.12
| Escape velocity (km/s) =            59.5
| GM (x 106 km3/s2) =                126.686
| Bond albedo =                        0.343
| Visual geometric albedo =            0.52
| Visual magnitude V(1,0) =           -9.40       -3.86           -
| Solar irradiance (W/m2) =           50.50
| Black-body temperature (K) =       110.0
| Moment of inertia (I/MR2) =          0.254
| J2 (x 10-6) =                       14,736
Number of natural satellites       67           1
Planetary ring system             Yes          No

Orbital parameters

                                   Jupiter      Earth   Ratio (Jupiter/Earth)
| Semimajor axis (106 km) =            778.57
| Sidereal orbit period (days) =     4,332.589
| Tropical orbit period (days) =     4,330.595
| Perihelion (106 km) =                740.52
| Aphelion (106 km) =                  816.62
Synodic period (days)               398.88        -             -
| Mean orbital velocity (km/s) =        13.07
| Max. orbital velocity (km/s) =        13.72
| Min. orbital velocity (km/s) =        12.44
| Orbit inclination (deg) =              1.304       0.000         -
| Orbit eccentricity =                   0.0489
| Sidereal rotation period (hours) =     9.9250*
| Length of day (hrs) =                  9.9259
| Obliquity to orbit (deg) =             3.13

* System III (1965.0) coordinates
Jupiter Observational Parameters

Discoverer:      Unknown
Discovery Date:  Prehistoric

Distance from Earth
        Minimum (106 km)          588.5
        Maximum (106 km)          968.1
Apparent diameter from Earth
        Maximum (seconds of arc)   50.1
        Minimum (seconds of arc)   29.8
Mean values at opposition from Earth
        Distance from Earth (106 km)        628.76    
        Apparent diameter (seconds of arc)   46.9
        Apparent visual magnitude            -2.7      
Maximum apparent visual magnitude            -2.94

Jupiter Mean Orbital Elements (J2000)

Semimajor axis (AU)                  5.20336301  
Orbital eccentricity                 0.04839266   
Orbital inclination (deg)            1.30530  
Longitude of ascending node (deg)  100.55615   
Longitude of perihelion (deg)       14.75385   
Mean Longitude (deg)                34.40438  

North Pole of Rotation

Right Ascension: 268.05 - 0.009T
Declination    :  64.49 + 0.003T
Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)

xxxx'''Saturn'''{{subst:Autobot/sandbox4 | ime = Saturn
Bulk parameters

                                     Saturn      Earth   Ratio (Saturn/Earth)
| Mass (1024 kg) =                     568.46
| Volume (1010 km3) =                   82,713
Radius (1 bar level) (km)
|  =   Equatorial                       60,268
|  =   Polar                            54,364
| Volumetric mean radius (km) =         58,232
| Ellipticity (Flattening) =             0.09796
| Mean density (kg/m3) =                   687
| Gravity (eq., 1 bar) (m/s2) =         10.44
| Acceleration (eq., 1 bar) (m/s2) =     8.96
| Escape velocity (km/s) =              35.5
| GM (x 106 km3/s2) =                   37.931
| Bond albedo =                          0.342
| Visual geometric albedo =              0.47
| Visual magnitude V(1,0) =             -8.88      -3.86            -
| Solar irradiance (W/m2) =             14.90
| Black-body temperature (K) =          81.1
| Moment of inertia (I/MR2) =            0.210
| J2 (x 10-6) =                     16,298.
Number of natural satellites         62          1
Planetary ring system               Yes         No

Orbital parameters

                                     Saturn      Earth   Ratio (Saturn/Earth)
| Semimajor axis (106 km) =           1,433.53
| Sidereal orbit period (days) =     10,759.22
| Tropical orbit period (days) =     10,746.94
| Perihelion (106 km) =               1,352.55
| Aphelion (106 km) =                 1,514.50
Synodic period (days)                378.09        -             -
| Mean orbital velocity (km/s) =          9.69
| Max. orbital velocity (km/s) =         10.18
| Min. orbital velocity (km/s) =          9.09
| Orbit inclination (deg) =               2.485       0.000         -
| Orbit eccentricity =                    0.0565
| Sidereal rotation period (hours) =     10.656*
| Length of day (hrs) =                  10.656
| Obliquity to orbit (deg) =             26.73

* Saturnian System III coordinates
Saturn Observational Parameters

Discoverer:      Unknown
Discovery Date:  Prehistoric

Distance from Earth
        Minimum (106 km)         1195.5
        Maximum (106 km)         1658.5
Apparent diameter from Earth
        Maximum (seconds of arc)   20.1
        Minimum (seconds of arc)   14.5
Mean values at opposition from Earth
        Distance from Earth (106 km)       1277.42    
        Apparent diameter (seconds of arc)   19.5
        Apparent visual magnitude             0.7 
Maximum apparent visual magnitude             0.43     

Saturn Mean Orbital Elements (J2000)

Semimajor axis (AU)                  9.53707032  
Orbital eccentricity                 0.05415060   
Orbital inclination (deg)            2.48446   
Longitude of ascending node (deg)  113.71504   
Longitude of perihelion (deg)       92.43194   
Mean Longitude (deg)                49.94432

North Pole of Rotation

Right Ascension: 40.5954 - 0.0577T
Declination    : 83.5380 - 0.0066T
Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)


xxxx'''Uranus'''{{subst:Autobot/sandbox4 | ime = Uranus
Bulk parameters

                                    Uranus      Earth   Ratio (Uranus/Earth)
| Mass (1024 kg) =                     86.832
| Volume (1010 km3) =                   6,833
Radius (1 bar level) (km)
|  =   Equatorial                      25,559
|  =   Polar                           24,973
| Volumetric mean radius (km) =        25,362
| Ellipticity (Flattening) =            0.02293
| Mean density (kg/m3) =                1,270
| Gravity (eq., 1 bar) (m/s2) =         8.87
| Acceleration (eq., 1 bar) (m/s2) =    8.69
| Escape velocity (km/s) =             21.3
| GM (x 106 km3/s2) =                   5.794
| Bond albedo =                         0.300
| Visual geometric albedo =             0.51
| Visual magnitude V(1,0) =            -7.19      -3.86             -
| Solar irradiance (W/m2) =             3.71
| Black-body temperature (K) =         58.2
| Moment of inertia (I/MR2) =           0.225
| J2 (x 10-6) =                      3343.43
Number of natural satellites        27          1
Planetary ring system              Yes         No

Orbital parameters

                                    Uranus      Earth   Ratio (Uranus/Earth)
| Semimajor axis (106 km) =           2,872.46
| Sidereal orbit period (days) =     30,685.4
| Tropical orbit period (days) =     30,588.740
| Perihelion (106 km) =               2,741.30
| Aphelion (106 km) =                 3,003.62
Synodic period (days)                369.66        -             -
| Mean orbital velocity (km/s) =          6.81
| Max. orbital velocity (km/s) =          7.11
| Min. orbital velocity (km/s) =          6.49
| Orbit inclination (deg) =               0.772       0.000         -
| Orbit eccentricity =                    0.0457
| Sidereal rotation period (hours) =    -17.24*
| Length of day (hrs) =                  17.24
| Obliquity to orbit (deg) =             97.77

* Magnetic coordinates (as determined by the Voyager 2 Radio Science experiment)
Uranus Observational Parameters

Discoverer:      William Herschel
Discovery Date:  13 March 1781

Distance from Earth
        Minimum (106 km)         2581.9
        Maximum (106 km)         3157.3
Apparent diameter from Earth
        Maximum (seconds of arc)    4.1
        Minimum (seconds of arc)    3.3
Mean values at opposition from Earth
        Distance from Earth (106 km)       2719.99    
        Apparent diameter (seconds of arc)    3.9
        Apparent visual magnitude             5.5  
Maximum apparent visual magnitude             5.32   

Uranus Mean Orbital Elements (J2000)

Semimajor axis (AU)                 19.19126393  
Orbital eccentricity                 0.04716771   
Orbital inclination (deg)            0.76986   
Longitude of ascending node (deg)   74.22988  
Longitude of perihelion (deg)      170.96424  
Mean Longitude (deg)               313.23218

North Pole of Rotation

Right Ascension: 257.43
Declination    : -15.10
Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)

xxxx'''Neptune'''{{subst:Autobot/sandbox4 | ime = Neptune
Bulk parameters

                                   Neptune      Earth   Ratio (Neptune/Earth)
| Mass (1024 kg) =                    102.43
| Volume (1010 km3) =                   6,254
Radius (1 bar level) (km)
|  =   Equatorial                     24,764
|  =   Polar                          24,341
| Volumetric mean radius (km) =       24,622
| Ellipticity (Flattening) =           0.01708
| Mean density (kg/m3) =               1,638
| Gravity (eq., 1 bar) (m/s2) =       11.15
| Acceleration (eq., 1 bar) (m/s2) =  11.00
| Escape velocity (km/s) =            23.5
| GM (x 106 km3/s2) =                  6.8351
| Bond albedo =                        0.290
| Visual geometric albedo =            0.41
| Visual magnitude V(1,0) =           -6.87      -3.86             -
| Solar irradiance (W/m2) =            1.51
| Black-body temperature (K) =        46.6
| J2 (x 10-6) =                     3411.
Number of natural satellites       13          1
Planetary ring system             Yes         No

Orbital parameters

                                   Neptune      Earth   Ratio (Neptune/Earth)
| Semimajor axis (106 km) =          4,495.06
| Sidereal orbit period (days) =    60,189.
| Tropical orbit period (days) =    59,799.9
| Perihelion (106 km) =              4,444.45
| Aphelion (106 km) =                4,545.67
Synodic period (days)               367.49        -             -
| Mean orbital velocity (km/s) =         5.43
| Max. orbital velocity (km/s) =         5.50
| Min. orbital velocity (km/s) =         5.37
| Orbit inclination (deg) =              1.769       0.000         -
| Orbit eccentricity =                   0.0113
| Sidereal rotation period (hours) =    16.11*
| Length of day (hrs) =                 16.11
| Obliquity to orbit (deg) =            28.32

* Magnetic coordinates (as determined by the Voyager 2 Radio Science experiment)
Neptune Observational Parameters

Discoverer:      Johann Gottfried Galle  (based on predictions by  
                 John Couch Adams and Urbain Leverrier)
Discovery Date:  23 September 1846

Distance from Earth
        Minimum (106 km)         4305.9
        Maximum (106 km)         4687.3
Apparent diameter from Earth
        Maximum (seconds of arc)    2.4
        Minimum (seconds of arc)    2.2
Mean values at opposition from Earth
        Distance from Earth (106 km)       4347.31    
        Apparent diameter (seconds of arc)    2.3
        Apparent visual magnitude             7.8      
Maximum apparent visual magnitude             7.78

Neptune Mean Orbital Elements (J2000)

Semimajor axis (AU)                 30.06896348  
Orbital eccentricity                 0.00858587   
Orbital inclination (deg)            1.76917  
Longitude of ascending node (deg)  131.72169   
Longitude of perihelion (deg)       44.97135  
Mean Longitude (deg)               304.88003

North Pole of Rotation

Right Ascension: 299.36 + 0.70 sin N
Declination    :  43.46 - 0.51 cos N
Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)
N = 359.28 + 549.308T degrees

xxxx'''Pluto'''{{subst:Autobot/sandbox4 | ime = Pluto
Bulk parameters

                                  Pluto          Earth      Ratio (Pluto/Earth)
| Mass (1024 kg) =                   0.0125
| Volume (1010 km3) =                0.715
| Equatorial radius (km)	 =          1195
| Polar radius (km) =                 1195
| Volumetric mean radius (km) =       1195
| Ellipticity (Flattening) =         0.0000
| Mean density (kg/m3) =              1750
| Surface gravity (m/s2) =           0.58
| Surface acceleration (m/s2) =      0.58
| Escape velocity (km/s) =           1.2
| GM (x 106 km3/s2) =                0.00083
| Bond albedo =                   0.4 - 0.6
| Visual geometric albedo =       0.5 - 0.7
| Visual magnitude V(1,0) =         -1.0           -3.86             -
| Solar irradiance (W/m2) =          0.89
| Black-body temperature (K) =      37.5
Number of natural satellites      5              1
Planetary ring system            No             No

Orbital parameters

                                  Pluto           Earth      Ratio (Pluto/Earth)
| Semimajor axis (106 km) =        5906.38
| Sidereal orbit period (days) =    90,465
| Tropical orbit period (days) =    90,588
| Perihelion (106 km) =            4436.82
| Aphelion (106 km) =              7375.93
Synodic period (days)            366.73             -              -
| Mean orbital velocity (km/s) =      4.72
| Max. orbital velocity (km/s) =      6.10
| Min. orbital velocity (km/s) =      3.71
| Orbit inclination (deg) =          17.16            0.000           -
| Orbit eccentricity =                0.2488
| Sidereal rotation period (hrs) = -153.2928
| Length of day (hrs) =             153.2820
| Obliquity to orbit (deg) =        122.53

Pluto Observational Parameters

Discoverer:      Clyde Tombaugh
Discovery Date:  18 February 1930

Distance from Earth
        Minimum (106 km)         4284.7
        Maximum (106 km)         7528.0
Apparent diameter from Earth
        Maximum (seconds of arc)    0.11
        Minimum (seconds of arc)    0.06
Mean values at opposition from Earth
        Distance from Earth (106 km)       5750.54    
        Apparent diameter (seconds of arc)    0.08
        Apparent visual magnitude            15.1      
Maximum apparent visual magnitude            13.65

Pluto Mean Orbital Elements (J2000)

Semimajor axis (AU)                 39.48168677  
Orbital eccentricity                 0.24880766  
Orbital inclination (deg)           17.14175  
Longitude of ascending node (deg)  110.30347  
Longitude of perihelion (deg)      224.06676  
Mean longitude (deg)               238.92881

On 11 February 1999 at 11:22 UT (6:22 a.m. EST), Pluto passed Neptune as the 
furthest planet from the Sun once again and will remain so until 5 April 2231.

North Pole of Rotation

Right Ascension: 313.02
Declination    :   9.09
Reference Date : 12:00 UT 1 Jan 2000 (JD 2451545.0)