National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
S/2004 N1: Facts & Figures
   Back to Neptune   Overview   Gallery   Facts & Figures   Education   News 
Discovered By
M. Showalter et al.
Date of Discovery
1 July 2013
Orbit Size Around Neptune (semi-major axis)
Metric: 105,283 km
English: 65,420 miles
Scientific Notation: 1.053E+05 km (7.038E-04 A.U.)
Orbit Period (Length of Year)
0.002600958 Earth years
0.95 Earth days
Orbit Circumference
Metric: 661,512.60 km
English: 411,044.87 miles
Scientific Notation: 6.615E+05 km
Average Orbit Velocity
Metric: 29,013.7 km/h
English: 18,028.3 mph
Scientific Notation: 8,059 m/s
Mean Radius
Metric: 9 km
English: 5.6 miles
Scientific Notation: 9.000E+00 km
By Comparison: 0.0014
Equatorial Circumference
Metric: 56.5 km
English: 35.1 miles
Scientific Notation: 5.6549E+01 km
Metric: 3,054 km3
Scientific Notation: 3.054E+03 km3
Surface Area
Metric: 1,017.88 km2
English: 393.00 square miles
Scientific Notation: 1.017876E+03 km2
Awards and Recognition   Solar System Exploration Roadmap   Contact Us   Site Map   Print This Page
NASA Official: Kristen Erickson
Advisory: Dr. James Green, Director of Planetary Science
Outreach Manager: Alice Wessen
Curator/Editor: Phil Davis
Science Writers: Courtney O'Connor and Bill Dunford
Producer: Greg Baerg
Webmaster: David Martin
> NASA Science Mission Directorate
> Budgets, Strategic Plans and Accountability Reports
> Equal Employment Opportunity Data
   Posted Pursuant to the No Fear Act
> Information-Dissemination Policies and Inventories
> Freedom of Information Act
> Privacy Policy & Important Notices
> Inspector General Hotline
> Office of the Inspector General
> NASA Communications Policy
> NASA Advisory Council
> Open Government at NASA
Last Updated: 12 Aug 2013