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                         IMCCE - Observatoire de Paris

		    Containt of the directory:  /pub/ephem/satel/la06

                                 2007, May 14
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CONTENTS: These files deliver the ephemrides of the five main Uranian satellites, Ariel, Umbriel, Titania, Oberon et Miranda.


AUTHOR  : V. Lainey


ADDRESS : IMCCE - Observatoire de Paris
          77 av. Denfert Rochereau, F-75014 PARIS
          Phone: (1) 40 51 22 72   
          Fax:   (1) 46 33 28 34 
          e-mail: lainey@imcce.fr



README FILE:       (03/05/2007)
------------


The subroutine EPHM delivers the ephemerides of the five main Uranian satellites. It is based on a numerical model fitted to the
observations dispatched from 1954 to 2005. These ephemerides are available only for the period [2006:2011]. For an extended use, feel free to
contact us by email at the following address: lainey@imcce.fr
The expected accuracy of these ephemerides is roughly 500 metres over this period.

More details are available in (Lainey, 2007).


EPHM is the only subroutine that the user should call. 


Input:
------

ET=Time Julian days (TDB) 
satellite number (1 Ariel, 2 Umbriel, 3 Titania, 4 Oberon, 5 Miranda) 


Output:
-------

positions are in Cartesian coordinates (x, y, z) in a frame centered on Uranus with axes in the J2000 Earth mean equatorial frame.


Units:
------

Positions are delivered in kilometres.


Examples:
---------

 Entrez la date desiree (en jours juliens TDB)
2453736.5d0
 Entrez le numero du satellite (1=Ariel, 2=Umbriel, 3=Titania, 4=Oberon, 5=Miranda)
1
  -170468.724722897        14975.1029537779        84362.6136297966
2
   260783.196449624       -53121.8607853646       -19885.5360152294
3
   425675.330649645       -89749.0834621863       -22941.0187481465
4
   10824.5788902419        152086.392233192       -562642.262920401
5
   66791.0232206958       -38271.3157321435        104613.113943285


 Entrez la date desiree (en jours juliens TDB)
2453866.5d0
 Entrez le numero du satellite (1=Ariel, 2=Umbriel, 3=Titania, 4=Oberon, 5=Miranda)
1
   113100.394169686        17097.7579754258       -153127.328116063
2
  -178819.880385548        88898.3387760009       -174448.402365970
3
   387074.006799250       -129598.067519370        152876.824710894
4
   466144.930473942       -185676.786129115        297535.977858030
5
   46190.6720869041       -36259.8090236384        115792.407597823
   


REFERENCE:

Lainey, V. "A new dynamical model for the Uranian satellites", accepté pour publication dans P&SS (2007).




Technical comments:
-------------------

1 - ephemeris construction: Chebychev polynomia

2 - software used: NOE version 1.0



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