I've added a new geosynchronous camera type. This allows me to keep focus on a planet or moon at a specific latitude and longitude, while allowing adjustment of height, field-of-view, and bearing.
This required calculation of the north bearing to counteract changes in direction as the camera tracks an object over time due to the object's obliquity. I initially tried the design shown below in Figures 1-2.
Figures 1-2. Compass designs.
In this design, there is an outer radial scale for bearing. The inner scales show latitude and longitude, and always pass through the origin of the enclosing circle. The latitude scale remains straight. The longitude scale shows a circle of constant latitude. The bearing is shown in degrees, latitude and longitude in degrees, minutes, and seconds, and altitude in km.
I then tried the following design shown below in Figures 3-4.
Figures 3-4. Compass designs.
In this design, there is again an outer radial scale for bearing. Inside the circle is a spherical representation of the orientation of the planet or moon, which may be more intuitive than the previous design. A screenshot including a planet is shown below in Figure 5, which I've also uploaded to the project gallery.
Figure 5. Compass with planet.