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Solar System Exploration
Ymir: Facts & Figures
   Back to Saturn   Overview   Facts & Figures   News 
Discovered By
Brett J. Gladman, John J. Kavelaars, Jean-Marc Petit, Hans Scholl, Matthew J. Holman, Brian G. Marsden, Phillip D. Nicholson, and Joseph A. Burns
Date of Discovery
Orbit Size Around Saturn (semi-major axis)
Metric: 23,140,400 km
English: 14,378,778 miles
Periapsis (closest)
Metric: 15,418,449 km
Apoapsis (farthest)
Metric: 30,862,351 km
Sidereal Orbit Period (Length of Year)
3.601861739 Earth years
1,315.58 Earth days
By Comparison: Retrograde orbit
Orbit Circumference
Metric: 141,259,079.59 km
Average Orbit Velocity
Metric: 4,473.9 km/h
Orbit Eccentricity
Orbit Inclination
By Comparison: Retrograde orbit
Mean Radius
Metric: 9.0 (assuming an albedo of 0.06) km
Equatorial Circumference
Metric: 56.5 km
Metric: 3,054 km3
Metric: 4,945,605,829,220,740 kg
Scientific Notation: 4.9456 x 1015 kg
Metric: 2.3 g/cm3
Surface Area
Metric: 1,017.88 km2
Surface Gravity
Metric: 0.004 m/s2
Escape Velocity
Metric: 31 km/h

Additional Information:

-USGS Astrogeology: Gazetteer of Planetary Nomenclature:

-JPL Solar System Dynamics:

-Solar System Moons: Discovery and Mythology by Jürgen Blunck; Springer-Verlag Berlin Heidelberg 2010

-Encyclopedia of the Solar System, second edition; edited by Lucy-Ann McFadden, Paul R. Weissman, and Torrence V. Johnson; Academic Press 2007

-Ellis Miner

-Encyclopædia Britannica Online. 2010:

-"A deeper look at the colors of the Saturnian irregular satellites" by Tommy Grav and James Bauer

-Edda by Snorri Sturluson, translated by Anthony Faulkes. Everyman Paperbacks, 1995
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Last Updated: 4 Apr 2011