Orbital data of S/2003 N1?

[Jacky Fung]

Where can I get the orbital data of S/2003 N1?

[selden]

http://ssd.jpl.nasa.gov/sat_elem.html

[Darkmiss]

This nasa facts sheet conflicts with that web page Selden
which one is right ?

http://nssdc.gsfc.nasa.gov/planetary/factsheet/neptuniansatfact.html

for example your web link says that S/2002 N1 Semi-major Axis is 15686000.
and the link i found says 21990.000
And in the Numberedmoons.ssc it is 21930000
BIG diference, what one is right

And is S/2003 N1 confirmed as the 12th satelite now ?

[granthutchison]

Where can I get the orbital data of S/2003 N1?

The usual ecliptic coordinates given in Selden's link need a little recalculation before they can be used in Celestia. See below for the Celestia elements.

This nasa facts sheet conflicts with that web page Selden
which one is right ?

Selden's link is the more up-to-date version. The original published elements for the outer Neptunians were very approximate, and they've recently been revised, with major effect on 2002N1. The difference between your link, Darkmiss, and the old numberedmoons.ssc is mainly a factor of a thousand, because the table you link to is given in units of a thousand kilometres.
You can update your present numberedmoons.ssc by overwriting the Neptune definitions with:

Code: Select all

# Additional moons of Neptune

"2002N1" "Sol/Neptune"
{
   Texture       "asteroid.jpg"
   Mesh      "asteroid.cms"
   Radius      24

   EllipticalOrbit
   {
   Period      1874.83
   SemiMajorAxis   15686000
   Eccentricity   0.5720
   Inclination     138.937   #
   AscendingNode   162.954   #
   ArgOfPericenter 148.033   # J2000.0
   MeanAnomaly     229.825   #
   }

   RotationPeriod  10   # Guess

   Albedo 0.155
}

"2002N2" "Sol/Neptune"
{
   Texture       "asteroid.jpg"
   Mesh      "asteroid.cms"
   Radius      24

   EllipticalOrbit
   {
   Period      2405.98
   SemiMajorAxis   19345000
   Eccentricity   0.4686
   Inclination        32.341   #
   AscendingNode    19.826   #
   ArgOfPericenter   8.087   # J2000.0
   MeanAnomaly      44.422   #
   }

   RotationPeriod  10   # Guess

   Albedo 0.155
}

"2002N3" "Sol/Neptune"
{
   Texture       "asteroid.jpg"
   Mesh      "asteroid.cms"
   Radius      24

   EllipticalOrbit
   {
   Period      2674.87
   SemiMajorAxis   20723000
   Eccentricity   0.6005
   Inclination        15.996   #
   AscendingNode    10.850   #
   ArgOfPericenter 140.223   # J2000.0
   MeanAnomaly     124.409   #
   }

   RotationPeriod  10   # Guess

   Albedo 0.155
}


"2003N1" "Sol/Neptune"
{
   Texture       "asteroid.jpg"
   Mesh      "asteroid.cms"
   Radius      14

   EllipticalOrbit
   {
   Period      9136.11
   SemiMajorAxis   46738000
   Eccentricity   0.4503
   Inclination       118.728   #
   AscendingNode   288.166   #
   ArgOfPericenter 161.337   # J2000.0
   MeanAnomaly     182.124   #
   }

   RotationPeriod  10   # Guess

   Albedo 0.155
}


Grant

[Darkmiss]

Thank you Grant