{"id":2153,"date":"2019-11-03T21:40:00","date_gmt":"2019-11-03T20:40:00","guid":{"rendered":"http:\/\/astroaspach.fr\/astroaspachV2\/?p=2153"},"modified":"2020-11-03T21:42:36","modified_gmt":"2020-11-03T20:42:36","slug":"les-orbites-des-satellites-duranus","status":"publish","type":"post","link":"http:\/\/astroaspach.fr\/astroaspachV2\/2019\/11\/03\/les-orbites-des-satellites-duranus\/","title":{"rendered":"Les orbites des satellites d’Uranus"},"content":{"rendered":"

\"\"<\/a>L’axe de rotation de Uranus sur elle m\u00eame est inclin\u00e9 de 98\u00b0 par rapport \u00e0 son plan orbital. Comment cela s’est-il fait ? Par une collision avec un ast\u00e9ro\u00efde peu de temps apr\u00e8s sa cr\u00e9ation !!!<\/p>\n

Regardons de plus pr\u00e8s les satellites d’Uranus, qui sont au nombre de vingt sept aujourd’hui en novembre 2020. Dix huit d’entre eux, qui orbitent tout pr\u00e8s d’Uranus,\u00a0 sont tr\u00e8s peu inclin\u00e9s par rapport au plan \u00c9QUATORIAL d’Uranus, tournent dans le plan \u00e9quatorial d’Uranus. Comment se sont-ils form\u00e9s ? Le choc qui a fait basculer Uranus a cr\u00e9\u00e9 un disque de vapeur, qui en se condensant, a cr\u00e9\u00e9 tous ces satellites, c’est peut-\u00eatre une explication.<\/p>\n

Autre chose \u00e9trange \u00e9galement, les neuf satellites restant se trouvent \u00e0 une grande distance d’Uranus, et leurs orbites sont toutes \u00e0 peu pr\u00e8s, inclin\u00e9es d’un m\u00eame angle sur le plan \u00e9quatorial d’Uranus et tous r\u00e9trogrades (sauf un, Margaret). Des satellites du monde d’avant ?<\/p>\n

Le tableau ci dessous est extrait d’une page du site de la nasa :
https:\/\/nssdc.gsfc.nasa.gov\/planetary\/factsheet\/uraniansatfact.html<\/a><\/p>\n

Semi-major axis : rayon de l’orbite en milliers de km
Semi-major axis : rayon de l’orbite en rayons d’Uranus
P\u00e9riode orbital en jour (R signifie r\u00e9trograde)
Inclinaison de l’orbite sur le plan \u00e9quatorial d’Uranus<\/p>\n\n\n

Orbital parameters<\/td><\/tr>
<\/td>Semi-major
axis (103<\/sup>km)<\/td>		Semi-major
axis (Uranian Radii)<\/td>		Orbital
Period
(days)<\/td>		Inclination
(degrees)<\/td><\/tr>
<\/td><\/td><\/tr>
Major Satellites<\/td><\/td><\/tr>
  Miranda (UV)<\/td>129.90<\/td>5.082<\/td>1.413479<\/td>4.34<\/td><\/tr>
  Ariel (UI)<\/td>190.90<\/td>7.469<\/td>2.520379<\/td>0.04<\/td><\/tr>
  Umbriel (UII)<\/td>266.00<\/td>10.41<\/td>4.144176<\/td>0.13<\/td><\/tr>
  Titania (UIII)<\/td>436.30<\/td>17.07<\/td>8.705867<\/td>0.08<\/td><\/tr>
  Oberon (UIV)<\/td>583.50<\/td>22.83<\/td>13.463234<\/td>0.07<\/td><\/tr>
<\/td><\/td><\/tr>
Lesser Satellites<\/td><\/td><\/tr>
  Cordelia (UVI, S\/1986 U7)<\/td>49.80<\/td>1.948<\/td>0.335034<\/td>0.08<\/td><\/tr>
  Ophelia (UVII, S\/1986 U8)<\/td>53.80<\/td>2.105<\/td>0.376400<\/td>0.10<\/td><\/tr>
  Bianca (UVIII, S\/1986 U9)<\/td>59.20<\/td>2.316<\/td>0.434579<\/td>0.19<\/td><\/tr>
  Cressida (UIX, S\/1986 U3)<\/td>61.80<\/td>2.418<\/td>0.463570<\/td>0.01<\/td><\/tr>
  Desdemona (UX, S\/1986 U6)<\/td>62.70<\/td>2.453<\/td>0.473650<\/td>0.11<\/td><\/tr>
  Juliet (UXI, S\/1986 U2)<\/td>64.40<\/td>2.520<\/td>0.493065<\/td>0.07<\/td><\/tr>
<\/td><\/td><\/tr>
  Portia (UXII, S\/1986 U1)<\/td>66.10<\/td>2.586<\/td>0.513196<\/td>0.06<\/td><\/tr>
  Rosalind (UXIII, S\/1986 U4)<\/td>69.90<\/td>2.735<\/td>0.558460<\/td>0.28<\/td><\/tr>
  Cupid (S\/2003 U2<\/td>74.39<\/td>2.911<\/td>0.613<\/td>0.10<\/td><\/tr>
  Belinda (UXIV, S\/1986 U5)<\/td>75.30<\/td>2.946<\/td>0.623527<\/td>0.03<\/td><\/tr>
  Perdita (XXV, S\/1986 U10)<\/td>76.42<\/td>2.990<\/td>0.638<\/td>0.47<\/td><\/tr>
  Puck (UXV, S\/1985 U1)<\/td>86.00<\/td>3.365<\/td>0.761833<\/td>0.32<\/td><\/tr>
  Mab (S\/2003 U1)<\/td>97.74<\/td>3.824<\/td>0.923<\/td>0.13<\/td><\/tr>
<\/td><\/td><\/tr>
  Francisco (XXII, S\/2001 U3)<\/td>4276.<\/td>167.3<\/td>266.6R<\/td>147.25<\/td><\/tr>
  Caliban (UXVI, S\/1997 U1)<\/td>7231.<\/td>282.9<\/td>579.5R<\/td>141.53<\/td><\/tr>
  Stephano (UXX, S\/1999 U2)<\/td>8004.<\/td>313.2<\/td>676.5R<\/td>143.82<\/td><\/tr>
  Trinculo (UXXI, S\/2001 U1)<\/td>8504.<\/td>332.7<\/td>758.1R<\/td>166.93<\/td><\/tr>
  Sycorax (UXVII, S\/1997 U2)<\/td>12179.<\/td>476.5<\/td>1283.4R<\/td>159.42<\/td><\/tr>
<\/td><\/td><\/tr>
  Margaret (UXXIII, S\/2003 U3)<\/td>14345.<\/td>561.3<\/td>1694.8<\/td>57.37<\/td><\/tr>
  Prospero (UXVIII, S\/1999 U3)<\/td>16256.<\/td>636.0<\/td>1977.3R<\/td>151.83<\/td><\/tr>
  Setebos (UXIX, S\/1999 U1)<\/td>17418.<\/td>681.5<\/td>2234.8R<\/td>158.24<\/td><\/tr>
  Ferdinand (XXIV, S\/2001 U2)<\/td>20901.<\/td>817.8<\/td>2823.4R<\/td>169.79<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"

\"\"<\/a>
\nUranus est tr\u00e8s bien entour\u00e9e !<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-2153","post","type-post","status-publish","format-standard","hentry","category-raconter-le-ciel"],"_links":{"self":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts\/2153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/comments?post=2153"}],"version-history":[{"count":13,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts\/2153\/revisions"}],"predecessor-version":[{"id":2166,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts\/2153\/revisions\/2166"}],"wp:attachment":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/media?parent=2153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/categories?post=2153"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/tags?post=2153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}