Occultation by a Possible Third Satellite of Neptune

@article{Reitsema1982OccultationBA,
  title={Occultation by a Possible Third Satellite of Neptune},
  author={H. J. Reitsema and William B. Hubbard and Larry Allen Lebofsky and David J. Tholen},
  journal={Science},
  year={1982},
  volume={215},
  pages={289 - 291}
}
The 24 May 1981 close approach of Neptune to an uncataloged star was photoelectrically monitored from two observatories separated by 6 kilometers parallel to the occultation track. An 8.1-second drop in signal, recorded simultaneously at both sites, is interpreted as resulting from the passage of a third satellite of Neptune in front of the star. From the duration of the event, the derived minimum diameter for an object sharing Neptune's motion is 180 kilometers. If the object was in Neptune's… 
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