Neptunian Rings Fact Sheet

[Image of Neptune's rings]

Rings of Neptune

                           Radius    Radius/       Optical     Albedo      Width      
                            (km)     Eq. radius     Depth     (x 10-3)      (km)
  Neptune equator          24,766      1.000                             
  Galle (1989N3R)         ~41,900      1.692      ~0.00008      ~15        ~2000
  LeVerrier (1989N2R)     ~53,200      2.148      ~0.002        ~15         ~110
  Lassell (1989N4R*)      ~53,200      2.148      ~0.00015      ~15        ~4000
  Arago (1989N4R*)        ~57,200      2.310                               <~100
  Unnamed (indistinct)     61,950      2.501
  Adams (1989N1R)          62,933      2.541      ~0.0045       ~15          ~50     
    Arcs in Adams Ring:
      Courage              62,933      2.541       0.12                      ~15    
      Liberté              62,933      2.541       0.12                      ~15     
      Egalité 1            62,933      2.541       0.12         ~40          ~15     
      Egalité 2            62,933      2.541       0.12         ~40          ~15     
      Fraternité           62,933      2.541       0.12                      ~15       

(*Lassell and Arago were originally identified as one ring, designated 1989N4R)
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Author/Curator:
Dr. David R. Williams, dave.williams@nasa.gov
NSSDC, Mail Code 690.1
NASA Goddard Space Flight Center
Greenbelt, MD 20771
+1-301-286-1258

NASA Official: Ed Grayzeck, edwin.j.grayzeck@nasa.gov
V1.0, 17 July 1995
Last Updated: 18 September 2006, DRW