English

Noun

aponigricon ‎(plural not attested)

1. (astronomy) Apoapsis around a black hole.
   • 2011 September, Lorenzo Iorio, “Long-term classical and general relativistic effects on the radial velocities of the stars orbiting Sgr A*”, in Monthly Notices of the Royal Astronomical Society:

     Indeed, the speed of, say, S2 at perinigricon is as large as 2.6 per cent of the speed of light, while at aponigricon it is 0.1 per cent of c.

   • 2013 June, R de la Fuente Marcos & C de la Fuente Marcos, “Colliding with G2 near the Galactic Centre: a geometrical approach”, in Monthly Notices of the Royal Astronomical Society:

     Fig. 1 indicates that close encounters are negligible at aponigricon and for inclinations in the range 60–90° in both prograde and retrograde orbits.