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Aegir (moon)

Moon of Saturn

Summary

Moon of Saturn

Field	Value
name	Aegir
image_size
discovery_ref
discoverer	S. Sheppard, D. Jewitt, J. Kleyna, and B. Marsden
discovered	May 4, 2005
mpc_name	Saturn XXXVI
alt_names	S/2004 S 10
pronounced	etc.
named_after	Ægir
orbit_ref
semimajor
avg_speed
eccentricity	0.252
period
inclination	166.7°
satellite_of	Saturn
group	Norse group
physical_ref
mean_diameter	4 km
albedo	0.06 (assumed)
spectral_type	B–R = 1.30 ± 0.06
magnitude	24.4
abs_magnitude	15.5

Aegir, also Saturn XXXVI (provisional designation S/2004 S 10), 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 4, 2005, from observations taken between December 12, 2004, and March 11, 2005.

Aegir is about 4 kilometres in diameter, and orbits Saturn at an average distance of 19,618 Mm in 1025.908 days, at an inclination of 167° to the ecliptic (140° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.237.

Name

The moon was named in April 2007 after Ægir, a giant from Norse mythology, the personification of tranquil seas, the one who soothes storms away. He is a son of Fornjót, and brother of Logi (fire, flame) and Kári (wind). The exoplanet Epsilon Eridani b (Ægir) was also named after this figure in 2015. The generally accepted way to differentiate the moon from the exoplanet is to spell the moon with the letters "a" and "e" as two separate letters, but put them together for the exoplanet ("Æ"). If "Æ" cannot be used, it is recommended to spell the exoplanet "AEgir".

The name may be pronounced various ways. (with the 'g' pronounced as a y-sound) approximates modern Norwegian and Icelandic. (with a hard 'g') approximates what the Old Norse may have sounded like, while the Latinized/spelling pronunciations , and are also found.

References

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References

...
(15 December 2015). "Final Results of NameExoWorlds Public Vote Released". [[International Astronomical Union]].
''Merriam-Webster's Encyclopedia of Literature'' (1995)
{{dict.com. Aegir
Harold Stanford. (1922). "The Standard Reference Work: For the Home, School and Library".
Graykowski, Ariel. (2018-04-05). "Colors and Shapes of the Irregular Planetary Satellites". The Astronomical Journal.

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

norse-group moons-of-saturn irregular-satellites discoveries-by-scott-s.-sheppard astronomical-objects-discovered-in-2005 moons-with-a-retrograde-orbit

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