in the rendering options, you have to check the orbits in general but not those of spacecraft; so you only display the orbit of the selected object
That dismissal! It was obvious.

Thanks Gironde
Great! @Toutatis @gironde @spacefanatic64 @DaveBowman2001, and others, for the effort.![]()
@Toutatis I really want to see the Viking orbiter.
Can we see the whole mission? Journey of the orbiters until arriving at Mars, attached with the probes of landing, separation of the probes and landing and orbits of the orbitadores until the end of the mission?
MFI (Magnetic Field Investigation):
MFI PI: R. Lepping, NASA/GSFC. Objectives: investigation of the structure and fluctuations of the interplanetary magnetic field (transport of energy and acceleration of particles in the solar wind). Instrument: Magnetometer measures the intensity and direction of magnetic field vector. The MFI instrument consists of dual triaxial fluxgate magnetometers mounted on a 12 m radial boom, and a data processing and control unit within the spacecraft bus. The magnetometer sensors each produce analog signals proportional to the strength of the magnetic field component aligned with the sensor. These signals are then digitized and processed by a microprocessor controlled data system.
@gironde that addon you use for Comet 67P / Churiumov-Guerasimenko and that this coincides with the trajectory of Rosetta?
I have tried several and none is true.
On August 6, 2014, the probe should be 100Km away.
In Celestia, with your addon, the probe is located at almost 2 million kilometers. Something is wrong somewhere and I know what it is.
but from 5 August 2014 to 5 October 2016 the central body for the orbit will be Comet 67P / Churiumov-Guerasimenko...