Greip (moon)

Greip /ˈɡrp/ or Saturn LI is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on 26 June 2006, from observations taken between 5 January and 1 May 2006. Greip is about 6 kilometres in diameter, and orbits Saturn at an average distance of 18,066 Mm in 906.556 days, at an inclination of 172.7° to the ecliptic (159.2° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.3735. Its rotation period is 12.75±0.35 hours.[2]

Greip
Greip-cassini.png
Greip imaged by the Cassini spacecraft in September 2015
Discovery
Discovery date2006
Designations
Designation
Saturn LI
S/2006 S 4
Orbital characteristics[1]
18206000 km
Eccentricity0.326
−921.2 days
Inclination179.8°
Satellite ofSaturn
GroupNorse group
Physical characteristics
Mean diameter
5+50%
−30%
 km
[2]
12.75±0.35? h[2]
24.4

It is named after Greip, a giantess in Norse mythology.

ReferencesEdit

  1. ^ S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
  2. ^ a b c Denk, T.; Mottola, S. (2019). Cassini Observations of Saturn's Irregular Moons (PDF). 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute.