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Planetary Satellite Mean Elements

Mean elements, in this context, are simply the elements of a precessing ellipse which has been fit in a least squares sense to the numerically integrated orbit. Please see the warning above.

Table column headings are described below.

Satellites of Earth

mean eclipic orbital elements
Epoch: 2000-01-01.5 TDB
Ephemeris: DE405/LE405 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
Ref.
 
Moon 301 384400. 0.0554 318.15 135.27 5.16 125.08 27.322 5.997 18.600 n/a

Satellites of Mars

mean orbital elements referred to the local Laplace planes
Epoch: 2000-01-01.5 TDB
Ephemeris: MAR097 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
R.A.
(deg)
Dec.
(deg)
Tilt
(deg)
Ref.
 
Phobos 401 9400. 0.015 216.3 189.6 1.1 169.2 0.319033 1.132 2.262 317.7 52.9 0.0 10
Deimos 402 23500. 0.000 0.0 205.0 1.8 54.4 1.262361 0.000 54.537 316.7 53.5 0.9 10

Satellites of Jupiter

mean orbital elements referred to the local Laplace planes
Epoch: 2000-01-01.5 TDB
Ephemeris: JUP365 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
R.A.
(deg)
Dec.
(deg)
Tilt
(deg)
Ref.
 
Io 501 421800. 0.004 49.1 330.9 0.0 0.0 1.762732 1.333 0.000 268.1 64.5 0.0 23
Europa 502 671100. 0.009 45.0 345.4 0.5 184.0 3.525463 1.394 30.202 268.1 64.5 0.0 23
Ganymede 503 1070400. 0.001 198.3 324.8 0.2 58.5 7.155588 68.301 137.812 268.2 64.6 0.1 23
Callisto 504 1882700. 0.007 43.8 87.4 0.3 309.1 16.690440 277.921 577.264 268.7 64.8 0.4 23
Amalthea 505 181400. 0.003 180.1 310.6 0.4 282.9 0.499918 0.196 0.393 268.1 64.5 0.0 23
Thebe 514 221900. 0.018 26.6 182.1 1.1 340.4 0.676105 0.398 0.797 268.1 64.5 0.0 23
Adrastea 515 129000. 0.000 0.0 214.5 0.0 0.0 0.298260 0.000 0.000 268.1 64.5 0.0 23
Metis 516 128000. 0.000 0.0 166.0 0.0 0.0 0.294779 0.000 0.000 268.1 64.5 0.0 23

mean eclipic orbital elements
Epoch: 2000-01-01.5 TDB
Ephemeris: JUP344 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
Ref.
 
Himalia 506 11440600. 0.160 328.4 66.5 28.1 68.2 250.562210 138.078 285.676 21
Elara 507 11712300. 0.211 140.1 330.7 27.9 118.1 259.639884 127.616 261.624 21
Pasiphae 508 23468200. 0.412 264.8 277.8 148.4 312.3 743.612321 81.126 80.786 21
Sinope 509 23683900. 0.264 96.6 167.5 157.3 304.6 758.849903 88.675 87.408 21
Lysithea 510 11700800. 0.117 47.4 331.5 27.2 7.1 259.198081 129.737 286.328 21
Carme 511 23144400. 0.256 155.0 234.0 164.6 117.5 734.185280 81.289 88.540 21
Ananke 512 21034500. 0.237 56.2 259.4 147.6 17.6 629.791691 142.376 110.506 21
Leda 513 11146400. 0.162 270.9 233.4 28.6 215.7 240.926609 146.033 310.776 21
Callirrhoe 517 23795500. 0.297 180.5 107.1 145.1 281.5 758.860222 119.762 89.001 21
Themisto 518 7398500. 0.340 236.2 284.7 43.8 209.5 130.028096 - 420.197 21
Magaclite 519 23644600. 0.421 85.1 138.1 149.8 280.3 752.861984 77.078 79.432 21
Taygete 520 23108000. 0.253 341.0 95.7 164.7 305.9 732.451194 81.237 88.733 21
Chaldene 521 22930500. 0.265 335.0 266.2 164.7 134.4 723.712689 81.657 89.543 21
Harpalyke 522 20892100. 0.232 71.3 219.3 147.7 30.2 623.316099 145.025 111.952 21
Kalyke 523 23302600. 0.260 130.3 256.0 164.8 45.3 742.015252 80.786 87.701 21
Iocaste 524 21066700. 0.227 244.7 215.5 148.8 268.9 631.593822 145.877 110.871 21
Erinome 525 23032900. 0.276 98.2 265.5 164.4 314.3 728.482799 80.374 88.108 21
Isonoe 526 22981300. 0.249 213.5 124.9 164.8 132.2 726.273223 82.135 89.957 21
Praxidike 527 20935400. 0.246 357.2 112.2 148.3 278.4 625.389698 146.445 110.385 21
Autonoe 528 23792500. 0.330 228.3 145.7 150.8 271.8 761.001946 92.519 85.278 21
Thyone 529 20978000. 0.233 343.5 244.4 147.5 235.0 627.175794 146.131 111.518 21
Hermippe 530 21108500. 0.219 356.6 134.7 150.2 331.0 633.904723 135.082 110.661 21
Aitne 531 23064400. 0.277 81.3 106.0 164.6 8.2 730.100120 80.391 88.413 21
Eurydome 532 22899000. 0.294 340.2 286.3 149.1 302.5 717.308142 111.830 93.152 21
Euanthe 533 20827000. 0.239 169.8 336.5 148.0 253.7 620.437937 142.520 111.810 21
Euporie 534 19265800. 0.148 329.8 72.2 145.7 58.4 550.686793 - 138.419 21
Orthosie 535 20901000. 0.299 140.1 200.7 144.3 219.1 622.585958 143.587 106.485 21
Sponde 536 23543300. 0.322 184.9 173.8 149.3 120.5 748.294484 98.176 87.481 21
Kale 537 23052600. 0.262 283.6 212.7 164.6 60.8 729.642670 81.337 88.943 21
Pasithee 538 22846700. 0.270 295.2 216.0 164.6 329.1 719.465077 81.009 89.472 21
Hegemone 539 23348700. 0.358 282.2 233.7 152.6 320.1 739.806820 85.714 84.710 21
Mneme 540 20821000. 0.247 18.5 253.7 148.0 11.6 620.068159 148.789 111.345 21
Aoede 541 23778200. 0.436 72.9 198.8 155.7 174.5 761.464554 69.343 76.914 21
Thelxinoe 542 20976000. 0.228 333.4 267.9 150.6 170.1 628.025732 131.527 110.790 21
Arche 543 23097800. 0.261 213.5 39.8 164.6 339.7 731.879533 81.361 88.615 21
Kallichore 544 23021800. 0.252 310.1 54.2 164.8 30.3 728.259347 82.013 89.444 21
Helike 545 20915700. 0.153 118.1 44.2 154.4 91.7 626.325893 128.151 115.019 21
Carpo 546 17042300. 0.416 86.6 339.8 53.2 54.0 456.286617 - 112.238 21
Eukelade 547 23067400. 0.277 283.7 203.6 164.6 192.2 730.301672 79.958 87.844 21
Cyllene 548 23654700. 0.419 47.8 121.3 146.8 252.6 751.974673 80.253 79.350 21
Kore 549 24205200. 0.328 229.3 31.8 141.5 314.6 776.763241 108.568 85.006 21
Herse 550 23150500. 0.262 101.2 141.2 164.4 292.7 734.522343 80.841 88.139 21
S2010_j1 551 23189800. 0.252 344.2 161.1 164.5 283.1 736.512347 81.202 88.194 21
S2010_j2 552 20793000. 0.248 15.1 306.3 148.1 3.0 618.841217 148.128 111.338 21
Dia 553 12260300. 0.232 176.8 309.6 29.0 292.3 278.212821 118.591 245.340 21
S2016_j1 554 20802600. 0.232 197.8 192.4 144.7 231.7 618.491978 172.452 112.960 21
S2003_j18 555 20336300. 0.090 304.4 66.1 145.3 164.3 598.121316 4.610 135.631 21
S2011_j2 556 22909200. 0.355 218.7 284.0 151.9 28.5 718.316562 87.848 87.140 21
Eirene 557 23055800. 0.258 94.8 329.7 164.6 179.5 729.847670 80.984 88.844 21
Philophrosyne 558 22604600. 0.229 271.6 69.5 146.3 233.1 702.535939 163.220 101.601 21
S2017_j1 559 23744800. 0.328 252.2 286.5 145.8 255.0 756.406342 108.088 86.595 21
Eupheme 560 20768600. 0.241 316.6 359.1 148.0 230.6 617.726175 150.073 112.595 21
S2003_j19 561 23156400. 0.265 123.4 218.4 164.7 26.9 734.778675 81.047 88.182 21
S2016_j2 562 18694200. 0.217 344.2 57.6 34.5 291.5 527.606246 48.686 136.971 21
S2017_j2 563 22953200. 0.272 137.5 293.3 164.5 4.1 724.709424 81.295 89.100 21
S2017_j3 564 20941000. 0.231 92.9 193.3 147.9 23.4 625.601566 145.650 111.667 21
Pandia 565 11481000. 0.179 194.3 153.9 29.0 249.1 251.911064 140.848 291.110 21
S2017_j5 566 23206200. 0.257 211.7 66.9 164.8 44.1 737.284766 81.014 88.443 21
S2017_j6 567 23245300. 0.336 100.0 150.2 149.7 318.6 733.993348 94.238 87.113 21
S2017_j7 568 20964800. 0.233 119.4 359.1 147.3 258.1 626.562241 146.553 111.335 21
S2017_j8 569 22849500. 0.255 146.9 350.4 164.8 91.6 719.760404 82.331 90.463 21
S2017_j9 570 21768700. 0.200 130.7 261.5 155.5 240.1 666.110044 110.795 103.984 21
Ersa 571 11401000. 0.116 304.7 263.4 29.1 116.9 249.228928 144.088 306.234 21
S2011_j1 572 23124500. 0.271 251.8 248.4 164.6 248.4 733.206260 80.182 87.657 21
S2003_j2 55501 20997700. 0.225 200.4 35.2 150.2 350.8 628.789460 139.072 110.518 21
S2003_j4 55502 22926500. 0.328 194.4 242.8 148.2 176.8 718.095543 102.409 89.495 21
S2003_j9 55503 23199400. 0.263 199.6 354.6 164.8 47.6 736.861154 80.606 88.190 21
S2003_j10 55504 23576300. 0.264 227.5 286.9 164.4 154.5 755.429041 79.301 85.670 21
S2003_j12 55505 20963100. 0.235 277.9 201.3 150.0 58.7 627.243242 133.246 110.154 21
S2003_j16 55506 20882600. 0.243 24.6 307.4 148.0 16.1 622.876561 146.583 111.039 21
S2003_j23 55507 23829300. 0.313 163.2 168.5 144.7 45.0 760.000608 119.441 88.919 21
S2003_j24 55508 22887400. 0.259 24.2 131.8 164.5 207.2 721.603536 81.634 89.706 21

Satellites of Saturn

mean orbital elements referred to the local Laplace planes
Epoch: 2000-01-01.5 TDB
Ephemeris: SAT441 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
R.A.
(deg)
Dec.
(deg)
Tilt
(deg)
Ref.
 
Mimas 601 186000. 0.020 160.4 275.3 1.6 66.2 0.942422 0.493 0.986 40.6 83.5 0.0 28
Enceladus 602 238400. 0.005 119.5 57.0 0.0 0.0 1.370218 2.916 0.000 40.6 83.5 0.0 28
Tethys 603 295000. 0.001 335.3 0.0 1.1 273.0 1.887802 0.005 4.982 40.6 83.5 0.0 28
Dione 604 377700. 0.002 116.0 212.0 0.0 0.0 2.736916 11.698 0.000 40.6 83.5 0.0 28
Rhea 605 527200. 0.001 44.3 31.5 0.3 133.7 4.517503 33.939 35.775 40.6 83.5 0.0 28
Titan 606 1221900. 0.029 78.3 11.7 0.3 78.6 15.945448 346.680 687.370 36.4 84.0 0.6 28
Hyperion 607 1481500. 0.105 214.0 122.9 0.6 87.1 21.276658 20.843 257.625 40.2 83.6 0.1 28
Iapetus 608 3561700. 0.028 254.5 74.8 7.6 86.5 79.331002 1662.900 3130.302 288.7 78.9 14.8 28
Phoebe 609 12929400. 0.164 240.3 308.0 175.2 192.7 550.303910 468.321 741.483 276.0 67.5 26.7 28
Helene 612 377600. 0.007 194.3 -64.5 0.2 260.8 2.736916 5.825 11.707 40.6 83.5 0.0 28
Telesto 613 295000. 0.001 66.2 360.0 1.2 242.1 1.887802 0.005 4.982 40.6 83.5 0.0 28
Calypso 614 295000. 0.001 221.6 -0.0 1.5 326.6 1.887803 0.005 4.983 40.6 83.5 0.0 28
Methone 632 194700. 0.002 315.5 0.0 0.0 0.0 1.009549 0.003 0.000 40.6 83.5 0.0 28
Polydeuces 634 377600. 0.019 94.1 359.0 0.2 167.5 2.736916 5.810 11.692 40.6 83.5 0.0 28

mean orbital elements referred to the local Laplace planes
Epoch: 2000-01-01.5 TDB
Ephemeris: SAT415 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
R.A.
(deg)
Dec.
(deg)
Tilt
(deg)
Ref.
 
Janus 610 151500. 0.007 11.1 111.7 0.2 159.9 0.697353 0.240 0.482 40.6 83.5 0.0 13
Epimetheus 611 151400. 0.020 96.3 197.2 0.3 189.8 0.697012 0.240 0.482 40.6 83.5 0.0 13
Atlas 615 137700. 0.001 82.3 289.1 0.0 0.0 0.604602 0.342 0.000 40.6 83.5 0.0 13
Prometheus 616 139400. 0.002 341.9 135.4 0.0 0.0 0.615878 0.357 0.000 40.6 83.5 0.0 13
Pandora 617 141700. 0.004 217.9 123.9 0.0 0.0 0.631369 0.379 0.000 40.6 83.5 0.0 13
Pan 618 133600. 0.000 0.0 146.6 0.0 0.0 0.575051 0.000 0.000 40.6 83.5 0.0 13
Pallene 633 212300. 0.004 194.9 2.0 0.2 304.3 1.156059 0.790 1.582 40.6 83.5 0.0 13
Daphnis 635 136500. 0.000 0.0 153.6 0.0 0.0 0.594080 0.000 0.000 40.6 83.5 0.0 13
Anthe 649 198100. 0.002 293.4 351.4 0.0 0.0 1.038898 1.190 0.000 40.6 83.5 0.0 13
Aegaeon 653 167500. 0.000 0.0 4.4 0.0 0.0 0.808115 0.000 0.000 40.6 83.5 0.0 13

mean eclipic orbital elements
Epoch: 2000-01-01.0 TDB
Ephemeris: SAT368 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
Ref.
 
Ymir 619 23128000. 0.334 21.4 228.7 173.5 192.9 1319.847106 217.606 277.534 8
Paaliaq 620 15166000. 0.341 238.7 321.3 44.8 327.7 686.551363 583.251 486.873 8
Tarvos 621 18243000. 0.538 274.1 265.8 33.7 102.5 929.854258 194.175 272.966 8
Ijiraq 622 11408000. 0.272 92.9 17.3 47.5 130.8 450.782015 13807.368 935.122 8
Suttungr 623 19468000. 0.114 34.3 321.1 175.8 227.3 1019.311883 292.788 402.196 8
Kiviuq 624 11343000. 0.212 90.6 171.0 48.6 352.5 448.424418 2081.871 1226.025 8
Mundilfari 625 18653000. 0.210 309.7 92.8 167.4 82.9 954.810885 312.235 417.307 8
Albiorix 626 16393000. 0.480 55.9 32.8 34.1 102.5 785.493801 249.881 358.137 8
Skathi 627 15635000. 0.272 203.5 114.7 152.6 286.6 728.504119 474.361 546.689 8
Erriapus 628 17602000. 0.472 282.5 294.8 34.5 151.0 874.171336 219.900 323.492 8
Siarnaq 629 18182000. 0.280 65.9 201.3 45.8 47.8 895.473525 457.402 454.201 8
Thrymr 630 20418000. 0.466 125.4 30.1 177.7 285.8 1095.728301 875.105 139002.086 8
Narvi 631 19349000. 0.430 170.0 114.2 145.7 174.4 1004.080178 341.382 347.424 8
Aegir 636 20751000. 0.252 242.7 26.0 166.7 179.1 1120.556732 273.907 350.178 8
Bebhionn 637 17116000. 0.468 358.1 168.0 35.1 199.1 837.352482 236.566 342.055 8
Bergelmir 638 19336000. 0.142 133.4 306.5 158.6 202.2 1006.939808 359.700 424.950 8
Bestla 639 20145000. 0.520 81.1 238.5 145.2 288.3 1088.578685 284.704 298.948 8
Farbauti 640 20390000. 0.241 343.0 282.8 156.5 135.1 1087.792115 330.766 374.342 8
Fenrir 641 22454000. 0.135 121.0 131.7 165.0 226.6 1263.011038 276.774 332.990 8
Fornjot 642 25146000. 0.208 324.8 214.5 170.4 259.9 1498.571662 223.680 267.438 8
Hati 643 19868000. 0.371 21.3 163.6 165.8 324.4 1042.754580 262.481 339.975 8
Hyrrokkin 644 18440000. 0.336 273.1 291.8 151.5 45.4 932.347313 375.760 406.454 8
Kari 645 22093000. 0.476 163.9 286.0 156.1 281.2 1233.961504 228.813 270.062 8
Loge 646 23059000. 0.186 32.8 337.2 167.7 343.8 1314.760074 251.724 307.347 8
Skoll 647 17667000. 0.464 193.1 45.0 161.0 296.6 879.826049 286.718 369.108 8
Surtur 648 22941000. 0.446 303.7 136.2 169.7 236.5 1302.093853 202.948 259.657 8
Jarnsaxa 650 19354000. 0.218 237.4 198.7 163.6 22.5 1008.831893 312.482 396.923 8
Greip 651 18457000. 0.315 152.2 314.5 174.8 349.4 939.491598 280.231 385.899 8
Tarqeq 652 17962000. 0.168 34.8 161.0 46.3 83.3 883.929303 896.594 593.128 8

mean eclipic orbital elements
Epoch: 2000-01-01.0 TDB
Ephemeris: SAT450 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
Ref.
 
S2004_s07 65085 21000000. 0.529 84.0 79.8 165.7 341.2 1144.049021 211.185 273.217 27
S2004_s12 65086 19886000. 0.327 87.1 1.6 165.3 307.9 1048.555767 273.219 351.490 27
S2004_s13 65087 18406000. 0.259 346.2 41.1 168.8 205.7 935.676474 302.014 409.391 27
S2004_s17 65088 19448000. 0.180 180.8 228.5 168.2 26.7 1016.880019 300.991 397.139 27
S2004_s20 654 19259000. 0.182 290.1 122.5 163.7 335.2 1007.037695 324.647 422.624 27
S2004_s21 65079 23131000. 0.409 182.0 187.5 155.0 114.6 1327.098207 231.177 250.529 27
S2004_s22 655 20598000. 0.216 118.9 102.8 177.4 297.4 1117.260225 1213.227 20023.997 27
S2004_s23 656 21457000. 0.437 22.8 65.1 176.6 132.3 1190.014784 188.451 240.115 27
S2004_s24 65070 23346000. 0.072 181.0 289.6 36.5 348.7 1343.853775 332.040 403.772 27
S2004_s25 657 20951000. 0.519 268.2 208.0 174.3 222.9 1147.065339 228.199 309.513 27
S2004_s26 658 26107000. 0.147 151.7 153.2 172.1 351.7 1605.931516 251.888 266.654 27
S2004_s27 659 19850000. 0.157 142.7 268.1 166.3 86.3 1054.462278 289.856 360.966 27
S2004_s28 65077 21843000. 0.161 186.6 95.9 169.4 125.1 1221.833573 236.659 297.956 27
S2004_s29 660 17070000. 0.488 318.9 183.8 39.0 159.4 840.465664 227.123 323.237 27
S2004_s30 661 20711000. 0.087 269.3 336.5 157.7 254.2 1124.151319 333.053 419.731 27
S2004_s31 65067 17499000. 0.202 262.7 255.4 48.3 73.3 863.022946 10081.347 590.879 27
S2004_s32 662 21152000. 0.254 32.7 169.4 158.9 298.7 1160.151154 308.755 356.871 27
S2004_s33 663 23581000. 0.514 309.7 128.3 159.1 80.4 1371.690918 187.005 229.028 27
S2004_s34 664 24150000. 0.282 346.5 34.7 167.5 292.6 1425.036793 231.807 282.938 27
S2004_s35 665 21965000. 0.237 154.2 320.2 176.8 286.4 1233.019900 748.387 2442.236 27
S2004_s36 65081 23439000. 0.617 204.4 138.8 152.5 208.0 1359.364234 177.595 228.393 27
S2004_s37 65082 15945000. 0.446 77.2 185.9 159.3 142.1 755.687193 318.879 422.625 27
S2004_s38 666 22266000. 0.541 346.6 101.4 155.3 127.0 1255.133062 198.815 242.961 27
S2004_s39 65084 23201000. 0.102 199.8 98.0 167.1 158.7 1339.290526 247.354 292.906 27
S2006_s01 65089 18780000. 0.141 155.0 96.6 156.2 336.6 962.902278 405.138 453.574 27
S2006_s03 65090 22428000. 0.379 188.7 167.1 158.6 207.0 1257.716554 245.535 287.393 27
S2007_s02 65091 16718000. 0.179 57.7 84.1 174.1 111.3 809.768472 342.954 496.445 27
S2007_s03 65092 18938000. 0.185 111.9 292.7 177.6 276.8 980.222599 1079.658 160832.319 27
S2019_s01 65093 11246000. 0.463 86.6 36.6 48.7 185.6 445.500596 1551.270 646.215 27

Satellites of Uranus

mean orbital elements referred to the local Laplace planes
Epoch: 2000-01-01.5 TDB
Ephemeris: URA111 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
R.A.
(deg)
Dec.
(deg)
Tilt
(deg)
Ref.
 
Ariel 701 190900. 0.001 83.3 119.8 0.0 0.0 2.520680 57.778 0.000 77.3 15.2 180.0 9
Umbriel 702 266000. 0.004 157.5 258.3 0.1 195.5 4.144548 65.761 136.799 77.3 15.2 180.0 9
Titania 703 436300. 0.001 202.0 53.2 0.1 26.4 8.706444 367.905 17295.870 77.3 15.2 180.0 9
Oberon 704 583400. 0.001 182.4 139.7 0.1 30.5 13.463606 522.476 855.045 77.3 15.2 180.0 9
Miranda 705 129900. 0.001 155.6 72.4 4.4 100.7 1.413784 8.936 17.780 77.3 15.2 180.0 9
Puck 715 86000. 0.000 0.0 50.1 0.4 216.0 0.761476 0.000 4.452 77.3 15.2 180.0 9

mean orbital elements referred to the local Laplace planes
Epoch: 2000-01-01.0 TDB
Ephemeris: URA115 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
R.A.
(deg)
Dec.
(deg)
Tilt
(deg)
Ref.
 
Cordelia 706 49800. 0.000 0.0 95.0 0.2 271.4 0.334569 0.000 0.657 77.3 15.2 180.0 14
Ophelia 707 53800. 0.011 344.3 280.5 0.1 266.5 0.376855 0.431 0.862 77.3 15.2 180.0 14
Bianca 708 59200. 0.001 97.0 236.2 0.1 209.5 0.435007 0.607 1.217 77.3 15.2 180.0 14
Cressida 709 61800. 0.000 0.0 332.8 0.1 304.0 0.463154 0.000 1.415 77.3 15.2 180.0 14
Desdemona 710 62700. 0.000 0.0 160.4 0.1 96.3 0.473228 0.000 1.454 77.3 15.2 180.0 14
Juliet 711 64400. 0.001 291.5 124.8 0.0 0.0 0.493479 1.611 0.000 77.3 15.2 180.0 14
Portia 712 66100. 0.000 0.0 343.7 0.0 0.0 0.513196 0.000 0.000 77.3 15.2 180.0 14
Rosalind 713 69900. 0.000 0.0 79.4 0.0 0.0 0.558459 0.000 0.000 77.3 15.2 180.0 14
Belinda 714 75300. 0.000 0.0 121.3 0.0 0.0 0.623527 0.000 0.000 77.3 15.2 180.0 14
Puck 715 86000. 0.000 0.0 174.5 0.3 215.5 0.761477 0.000 4.457 77.3 15.2 180.0 14
Perdita 725 76400. 0.002 310.4 32.2 0.0 0.0 0.638411 2.841 0.000 77.3 15.2 180.0 14
Mab 726 97700. 0.003 237.9 348.0 0.1 188.2 0.923293 3.402 6.645 77.3 15.2 180.0 14
Cupid 727 74400. 0.005 13.5 160.6 0.1 206.6 0.613168 1.738 4.137 77.3 15.2 180.0 14

mean eclipic orbital elements
Epoch: 2020-01-01.0 TDB
Ephemeris: URA116 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
Ref.
 
Caliban 716 7230000. 0.204 8.3 224.9 142.0 172.9 579.710700 5160.345 6506.766 29
Sycorax 717 12180000. 0.521 211.4 146.2 159.3 267.0 1289.230640 2815.882 1865.184 29
Prospero 718 16267000. 0.439 251.9 125.3 151.7 324.2 1980.390685 1681.121 1369.399 29
Setebos 719 17444000. 0.588 214.4 281.3 158.2 257.2 2228.671200 1425.260 1044.119 29
Stephano 720 8004000. 0.218 352.6 190.2 143.9 192.4 677.465564 4775.112 5153.051 29
Trinculo 721 8505000. 0.219 130.1 88.5 167.1 195.6 749.646809 12073.080 4260.552 29
Francisco 722 4283000. 0.139 297.3 129.5 147.4 101.4 267.097882 17739.663 14174.668 29
Margaret 723 14070000. 0.678 90.4 119.9 57.7 1.2 1648.050207 10000000.000 1000.115 29
Ferdinand 724 20648000. 0.397 79.1 256.7 169.8 224.0 2816.276439 1514.121 1000.447 29

Satellites of Neptune

mean orbital elements referred to the local Laplace planes
Epoch: 2000-01-01.5 TDB
Ephemeris: NEP097 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
R.A.
(deg)
Dec.
(deg)
Tilt
(deg)
Ref.
 
Triton 801 354800. 0.000 0.0 63.0 157.3 178.1 5.876994 0.000 340.379 299.8 43.1 0.4 20
Naiad 803 48200. 0.000 0.0 89.7 4.7 41.4 0.293980 0.000 0.575 299.7 42.7 0.4 20
Thalassa 804 50100. 0.000 0.0 165.7 0.2 130.6 0.311078 0.000 0.654 299.7 42.7 0.4 20
Despina 805 52500. 0.000 0.0 125.1 0.0 0.0 0.334656 0.000 0.000 299.7 42.7 0.4 20
Galatea 806 62000. 0.000 0.0 86.7 0.0 0.0 0.428744 0.000 0.000 299.8 43.1 0.4 20
Larissa 807 73500. 0.001 247.3 165.5 0.2 312.0 0.554989 1.257 2.514 299.8 43.1 0.4 20
Proteus 808 117600. 0.000 0.0 276.8 0.0 0.0 1.122315 0.000 0.000 299.8 42.6 0.9 20
Hippocamp 814 105300. 0.001 346.4 286.5 0.3 0.5 0.950390 8.726 661.762 299.8 43.0 0.4 20

mean eclipic orbital elements
Epoch: 2020-01-01.0 TDB
Ephemeris: NEP101 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
Ref.
 
Nereid 802 5504000. 0.749 290.3 318.0 5.8 326.0 360.140332 10392.563 13118.030 29
Halimede 809 15753700. 0.566 113.5 173.9 133.8 203.9 1879.549099 4802.538 5075.577 29
Psamathe 810 46701600. 0.451 261.3 70.2 137.1 303.7 9110.441896 1210.712 1333.827 29
Sao 811 22381400. 0.299 90.9 179.6 48.2 44.7 2914.259180 10000000.000 4299.694 29
Laomedeia 812 23607900. 0.418 146.0 248.3 34.8 57.6 3179.587179 2251.285 3156.503 29
Neso 813 50045900. 0.447 338.3 123.2 132.3 56.0 9617.750885 10000000.000 1124.550 29

Satellites of Pluto

mean equatorial orbital elements
Epoch: 2020-01-01.5 TDB
Ephemeris: PLU043 [ table legend ]

Satellite
 
Code
 
a
(km)
e
 
ω
(deg)
M
(deg)
i
(deg)
node
(deg)
P
(days)
Papsis
(yr)
Pnode
(yr)
Ref.
 
Charon 901 19600. 0.000 0.0 192.4 0.0 0.0 6.387223 0.000 0.000 11
Nix 902 48700. 0.000 0.0 84.8 0.0 0.0 24.854719 0.000 0.000 11
Hydra 903 64700. 0.006 143.4 330.6 0.3 114.2 38.489091 6.995 13.961 11
Kerberos 904 57800. 0.000 0.0 303.5 0.4 318.6 31.857773 0.000 9.047 11
Styx 905 42400. 0.000 0.0 180.9 0.0 0.0 20.161761 0.000 0.000 11

Table Column Descriptions

Satellite IAU name or designation of the satellite
Code JPL satellite ID
Ephemeris planetary satellite ephemeris ID used to derive the mean elements
Frame reference frame of the mean elements
Epoch epoch of the osculating mean elements
a semi-major Axis
e eccentricity
ω argument of periapsis
M mean anomaly
i inclination with respect to the reference plane
node longitude of the ascending node measured from the node of the reference plane on the ICRF equator
P sidereal period
Papsis argument of periapsis precession period
Pnode longitude of the ascending node precession period
R.A. right ascension of the Laplace-plane pole postion w.r.t. ICRF
Dec. declination of the Laplace-plane pole postion w.r.t. ICRF
Tilt angle between the planet's equatorial and Laplace planes

References

  1. B. A. Archinal, C. H. Acton, M. F. A’Hearn, et~al. (2018) "Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2015". Celest.~Mech. 130:22.
  2. J. K. Campbell, J. D. Anderson (1989) "Gravity Field of the Saturnian System from Pioneer and Voyager Tracking Data". AJ 97:1485-1495.
  3. M. Brozović, R. A. Jacobson (2009) "The Orbits of the Outer Uranian Satellites". AJ 137:3834-3842.
  4. R. A. Jacobson (2009) "The Orbits of the Neptunian Satellites and the Orientation of the Pole of Neptune". AJ 137:4322-4329.
  5. M. Brozović, R. A. Jacobson, S. S. Sheppard (2011) "The Orbits of the Outer Neptunian Satellites". AJ 141:135.
  6. R. Jacobson, M. Brozović, B. Gladman, M. Alexandersen, P. D. Nicholson, Veillet (2012) "Irregular satellites of the outer planets: orbital uncertainties and astrometric recoveries in 2009--2011". AJ 144:132.
  7. R. A. Jacobson (2014) "Update of the irregular Uranian satellite orbits with data through 2013 — URA112". personal communication to Horizons/NAIF.
  8. R. A. Jacobson (2014) "Update of Saturnian irregulars with Earthbased data through early 2014 and all Cassini imaging through 2013 — SAT368". personal communication to Horizons/NAIF.
  9. R. A. Jacobson (2014) "The Orbits of the Uranian Satellites and Rings, the Gravity Field of the Uranian System, and the Orientation of the Pole of Uranus". AJ 148:76-88.
  10. R. A. Jacobson, V. Lainey (2014) "Martian Satellite Orbits and Ephemerides". Planet. Space Sci. 102:35-44.
  11. M. Brozović, M. R. Showalter, R. A. Jacobson, M. W. Buie (2015) "The orbits and masses of satellites of Pluto". Icarus 246:317-329.
  12. M. Brozović, R. A. Jacobson (2017) "The Orbits of Jupiter's Irregular Satellites". AJ 153:147.
  13. R. A. Jacobson (2018) "Rock ephemeris file from fit to all Cassini data — SAT415". personal communication to Horizons/NAIF.
  14. M. Brozović, R. A. Jacobson (2019) "The Orbits of the inner satellites of Uranus: solution URA115". Interoffice Memo. 392R-19-007 (internal document).
  15. R. A. Jacobson, M. Brozovic, M. Showalter, A. Verbiscer, M. Buie, P. Helfenstein (2019) "The Orbits and Masses of Pluto's Satellites". In Pluto System After New Horizons 2133:7031.
  16. R. A. Jacobson (2019) "Ephemerides of the unnamed Saturnian irregulars including the 20 newly discovered ones — SAT428". personal communication to Horizons/NAIF.
  17. R. A. Jacobson (2020) "Ephemerides for the final comprehensive Cassini reconstruction — SAT427". personal communication to Horizons/NAIF.
  18. Marina Brozović, Mark R. Showalter, Robert A. Jacobson, Robert S. French, Jack J. Lissauer, Imke de Pater (2020) "Orbits and resonances of the regular moons of Neptune". Icarus 338:113462.
  19. R. A. Jacobson (2020) "The Orbits of the Regular Jovian Satellites, the Trajectories of Spacecraft at Jupiter, the Gravity Field of the Jovian System, and the Orientation of the Pole of Jupiter". Interoffice Memo. 392R-20-006 (internal document).
  20. M. Brozović (2020) "Update of the inner Neptunian satellite orbits — NEP097". personal communication to Horizons/NAIF.
  21. M. Brozović (2021) "Outer jovians with astrometry up to Nov 2020 — JUP344". personal communication to Horizons/NAIF.
  22. M. Brozović (2021) "Update of the inner Neptunian satellite orbits — NEP100". personal communication to Horizons/NAIF.
  23. R. A. Jacobson (2021) "The Orbits of the Regular Jovian Satellites and the Orientation of the Pole of Jupiter". personal communication to Horizons/NAIF.
  24. D. Durante, M. Parisi, D. Serra, M. Zannoni, V. Notaro, P. Racioppa, D. R. Buccino, G. Lari, L. Gomez Casajus, L. Iess, W. M. Folkner, G. Tommei, P. Tortora, S. J. Bolton (2020) "Jupiter's Gravity Field Halfway Through the Juno Mission". Geophys. Res. Lett. 47:e86572.
  25. M. Brozović (2021) "Update of Pluto's satellite orbits — PLU058". personal communication to Horizons/NAIF.
  26. M. Brozović, R. A. Jacobson (2021) "Ephemeris update ura116 for the irregular satellites of Uranus". Interoffice Memo. 392R-21-009 (internal document).
  27. R. A. Jacobson (2021) "Ephemerides of the unnamed Saturnian irregulars including the newly discovered S/2019~S1 — SAT450". personal communication to Horizons/NAIF.
  28. R. A. Jacobson (2021) "The Orbits of the Major Saturnian Satellites,the Trajectories of Spacecraft at Saturn, the Gravity Field of the Saturnian System, and the Orientation of Saturn's Pole". personal communication to Horizons/NAIF/Dragonfly.
  29. Marina Brozović, Robert A. Jacobson (2022) "Orbits of the irregular satellites of Uranus and Neptune". to appear in AJ .