From Surf Wiki (app.surf) — the open knowledge base

Margaret (moon)

Moon of Uranus

Field	Value
name	Margaret
image	File:S2003u3acircle.gif
caption	Discovery image of Margaret taken by the Subaru Telescope in August 2003
discovered	August 29, 2003
mpc_name	Uranus XXIII
pronounced
adjective	Margaretian
mean_orbit_radius	14,345,000 km
eccentricity	0.6608 (mean)
period	1687.01 d
inclination	57° (to the ecliptic)
satellite_of	Uranus
mean_radius	10 km (estimate)
surface_area	~1,300 km2 (estimate)
volume	~4,200 km3 (estimate)
mass	~5.5 kg (estimate)
density	~1.3 g/cm3 (assumed)
surface_grav	~0.0023 m/s2 (estimate)
escape_velocity	~0.0085 km/s (estimate)
rotation	?
axial_tilt	?
albedo	0.04 (assumed)
single_temperature	~65 K (estimate)

Scott S. Sheppard
David C. Jewitt

Margaret is the only known prograde irregular satellite of the moons of Uranus. It was discovered by Scott S. Sheppard, et al. in 2003 and given the provisional designation S/2003 U 3.

Confirmed as Uranus XXIII, it was named after the servant of Hero in William Shakespeare's play Much Ado About Nothing. The name was also chosen to match the name of Sheppard's mother.

Orbit

Animation of discovery images showing Margaret's motion relative to background stars and galaxies

Irregular satellites of Uranus

Margaret stands out as the only known prograde irregular satellite of Uranus. The diagram illustrates the orbital parameters of Margaret, unique among the irregular satellites of Uranus, with inclination on the vertical axis and the eccentricity of the orbits represented by the segments extending from the pericentre to the apocentre.

Margaret's inclination of 57° is close to the limit of stability. The intermediate inclinations 60 w) is almost 1.6 million years long. Margaret itself may be ejected from the Uranian system in the far future.

Margaret's orbit is subject to solar and planetary perturbations; thus, its orbital elements are variable over short timescales. Over a timescale of 8,000 years, the average orbital eccentricity of Margaret is 0.68. In 2010, its eccentricity grew to 0.81, temporarily giving Margaret the most eccentric orbit of any known moon in the Solar System, though Nereid's average eccentricity of 0.75 is greater.

References

| archive-url = https://web.archive.org/web/20080505184616/http://www.ifa.hawaii.edu/~sheppard/satellites/uranus2003.html | archive-date = 5 May 2008

IAU Circular 8217

References

Benjamin Smith (1903) ''The Century Dictionary and Cyclopedia''
Cathcart (1971) ''The Duchess of Kent''
Paul, Richard. (2014). "The Shakespearean Moons of Uranus". Folger Shakespeare Library.
(4 March 2009). "The Orbits of the Outer Uranian Satellites". The Astronomical Journal.

Info: 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.

moons-of-uranus irregular-satellites discoveries-by-scott-s.-sheppard astronomical-objects-discovered-in-2003 moons-with-a-prograde-orbit kozai-mechanism

Want to explore this topic further?

Ask Mako anything about Margaret (moon) — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report