nope Ring-Moon Systems Node - NEPTUNE NEPTUNE_TABLES

Vital Statistics for Neptune’s Rings and Inner Satellites

Rings of Neptune

Feature Middle Boundary (km) Width Optical Depth Notes
Galle 42,000 2,000 10^-4 A faint and poorly understood ring.
Le Verrier 53,200 < 100 10^-2 A narrow, axisymmetric ring.
Lassell 55,200 4,000 10^-4 A uniform, faint ring extending outward from Le Verrier.
Arago 57,200     A brightness enhancement at the outer edge of Lassell.
Unnamed 61,953     A ring of dust in the orbit of Galatea.
Adams 62,933 15 0.01 to 0.1 A narrow ring containing the arcs. It shows a radial wiggles due to perturbations from nearby Galatea.

Inner Satellites of Neptune

Name Semimajor Axis (km) Period (days) Eccentricity Inclination (deg) Mean Radius (km) Mass (10^20 kg)
Naiad 48,227 0.294396 0.000 4.74 29  
Thalassa 50,075 0.311485 0.000 0.21 40  
Despina 52,526 0.334655 0.000 0.07 74  
Galatea 61,953 0.428745 0.000 0.05 79  
Larissa 73,548 0.554654 0.000 0.2 94  
Proteus 117,647 1.122315 0.000 0.55 209  
Triton 354,760 5.876854 0.0004 156.834 1353 215
Nereid 5,513,400 360.13619 0.7512 7.23 170  

From Murray, C. D., and S. F. Dermott 1999. Solar System Dynamics, Cambridge University Press.