S/2007 S 2

S/2007 S 2 also known as "Alejandra" is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on May 1, 2007, from observations taken between January 18 and April 19, 2007. S/2007 S 2 is about 6 kilometres in diameter, and orbits Saturn at an average distance of 16,560,000 kilometres in 792.96 days, at an inclination of 176.68° to the ecliptic, in a retrograde direction and with an eccentricity of 0.218.

References

Institute for Astronomy Saturn Satellite Data
MPEC 2007-J09: S/2007 S 2, S/2007 S 3 May 1, 2007 (discovery and ephemeris)
IAUC 8836: S/2007 S 1, S/2007 S 2, and S/2007 S 3 (subscription-only) May 11, 2007 (discovery)

Moons of Saturn

Temporary names in italics.

Ring shepherds	S/2009 S 1 Propeller moonlets Pan Daphnis Atlas Prometheus ?(S/2004 S 6 S/2004 S 4 S/2004 S 3) Pandora

Co-orbitals	Epimetheus Janus

G Ring	Aegaeon

Mimas and Alkyonides	Mimas Methone Anthe Pallene

Inner large (with trojans)	Enceladus Tethys Telesto Calypso Dione Helene Polydeuces

Outer large	Rhea Titan Hyperion Iapetus

Inuit group	Kiviuq Ijiraq Paaliaq Siarnaq Tarqeq

Gallic group	Albiorix Bebhionn Erriapus Tarvos

Norse group	Phoebe Skathi S/2007 S 2 Skoll S/2004 S 13 Greip Hyrrokkin Mundilfari Jarnsaxa S/2006 S 1 S/2004 S 17 Narvi Bergelmir Aegir Suttungr S/2004 S 12 Bestla Farbauti Hati S/2004 S 7 Thrymr S/2007 S 3 S/2006 S 3 Surtur Kari Fenrir Ymir Loge Fornjot

Rings of Saturn Cassini–Huygens Themis Chiron In fiction

Saturn

Geography	Dragon Storm Great White Spot Hexagon Magnetosphere Rings Diamonds

Moons	S/2009 S 1 Pan Daphnis Atlas Prometheus ?(S/2004 S 6 S/2004 S 4 S/2004 S 3) Pandora Epimetheus Janus Aegaeon Mimas Methone Anthe Pallene Enceladus Tethys Telesto Calypso Dione Helene Polydeuces Rhea Titan Hyperion Iapetus Kiviuq Ijiraq Phoebe Paaliaq Skathi Albiorix S/2007 S 2 Bebhionn Erriapus Skoll Siarnaq Tarqeq S/2004 S 13 Greip Hyrrokkin Jarnsaxa Tarvos Mundilfari S/2006 S 1 S/2004 S 17 Bergelmir Narvi Suttungr Hati S/2004 S 12 Farbauti Thrymr Aegir S/2007 S 3 Bestla S/2004 S 7 S/2006 S 3 Fenrir Surtur Kari Ymir Loge Fornjot

Astronomy	Delta Octantis Saturn-crossing minor planets

Exploration	Cassini–Huygens Enceladus Explorer Pioneer 11 Voyager program

Related	Fiction Saturn Moons

Natural satellites of the Solar System

Planetary
satellites

Other
satellites

Largest
satellites
(mean radius
≥ 100 km)

size	Ganymede largest / 2634 km / 0.413 Earths Titan Callisto Io Moon Europa Triton Titania Rhea Oberon Iapetus Charon Umbriel Ariel Dione Tethys [Dysnomia] Enceladus Miranda Proteus Mimas [Hi'iaka] Nereid Hyperion Phoebe smallest / 106 km / 0.017 Earths

abc's	Ariel Callisto Charon Dione [Dysnomia] Enceladus Europa Ganymede [Hi'iaka] Hyperion Iapetus Io Mimas Miranda Moon Nereid Oberon Phoebe Proteus Rhea Tethys Titan Titania Triton Umbriel

Discovery timeline
Inner moons
Irregular moons
List
Naming
Regular moons
Trojan moons
NOTE: Italicized moons are not close to being in hydrostatic equilibrium; [bracketed] moons may or may not be close to being in hydrostatic equilibrium.

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