# eccentricity

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**Margaret (moon)**— Margaret Subaru 8.3 meter telescope discovery image Discovery Discovered by Scott S. Sheppard, and David C. Jewitt …122

**Sao (moon)**— Sao Discovery [1][2] Discovered by M.Holman JJ Kavelaars T. Grav W. Fraser D. Milisavljevic …123

**Master Juba**— Portrait of Boz s Juba from an 1848 London playbill Master Juba (ca. 1825 – ca. 1852 or 1853) was an African American dancer active in the 1840s. He was one of the first black performers in the United States to play onstage for white audiences… …124

**(137924) 2000 BD19**— Infobox Planet | discovery=yes | physical characteristics = yes | bgcolour=#FFFFC0 name=(137924) 2000 BD19 discoverer=LINEAR discovered=January 26, 2000 alt names= none mp category=Aten asteroid, Mercury crosser asteroid, Venus crosser asteroid,… …125

**Mu Arae**— Observation data Epoch J2000.0      Equinox J2000.0 …126

**Semi-minor axis**— The semi minor axis of an ellipse In geometry, the semi minor axis (also semiminor axis) is a line segment associated with most conic sections (that is, with ellipses and hyperbolas). One end of the segment is the center of the conic section, and …127

**Orbital state vectors**— In astrodynamics or celestial dynamics orbital state vectors (sometimes state vectors) are vectors of position ( ) and velocity ( ) that together with their time (epoch) ( ) uniquely determine the state of an orbiting body. State vectors are… …128

**Apse line**— In astrodynamics apse line (or line of apsides) is a common name for an imaginary line defined by orbit s eccentricity vector. It is strictly defined for elliptic, parabolic, and hyperbolic orbits. For those orbits it can be imagined as a line:… …