@misc{indiciae8fbfe4018d5a,
  title = {Orbital elements of Charon from speckle interferometry},
  author = {Beletic, J. W. and Goody, R. M. and Tholen, D. J.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890054091},
  note = {Source identifier: 19890054091}
}