A Survey for “Normal” Irregular Satellites around Neptune: Limits to Completeness

@article{Sheppard2006ASF,  title={A Survey for “Normal” Irregular Satellites around Neptune: Limits to Completeness},  author={Scott S. Sheppard and David C. Jewitt and Jan T. Kleyna},  journal={The Astronomical Journal},  year={2006},  volume={132},  pages={171 - 176},  url={https://api.semanticscholar.org/CorpusID:154011}}
We surveyed 1.75 deg2 of sky near Neptune to an R-band 50% detection efficiency of 25.8 mag (corresponding to radii of about 17 km for an assumed albedo of 0.04). We discovered one new outer satellite, Psamathe (S/2003 N1), about 20 km in radius with a distant retrograde orbit and moderate eccentricity. Until 2003 Neptune was only known to have two satellites that exhibited orbital signatures indicative of capture. Both of these, Triton and Nereid, are unusual when compared to the irregular… 

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