Margaret (moon)
| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| Discovered by | Scott S. Sheppard, and David C. Jewitt | ||||||
| Discovered in | August 29, 2003 | ||||||
| Orbital characteristics | |||||||
| Mean radius | 14,345,000 km | ||||||
| Eccentricity | 0.6608 | ||||||
| Orbital period | 1687.01 d | ||||||
| Inclination | 57° (to the ecliptic)[1] | ||||||
| Is a moon of | Uranus | ||||||
| Physical characteristics | |||||||
| Mean diameter | ~20 km (estimate)[1] | ||||||
| Surface area | ~1300 km2 (estimate) | ||||||
| Volume | ~4000 km3 (estimate) | ||||||
| Mass | ~1.0×1015 kg (estimate) | ||||||
| Mean density | ~1.5 g/cm3 (estimate) | ||||||
| Surface gravity | ~0.0023 m/s2 (estimate) | ||||||
| Escape velocity | ~0.005 km/s (estimate) | ||||||
| Rotation period | ? | ||||||
| Axial tilt | ?° | ||||||
| Albedo | 0.04 (assumed)[1] | ||||||
| Surface temp. |
| ||||||
| Atmospheric pressure | 0 kPa | ||||||
Margaret is the only prograde non-spherical moon of Uranus. It was found by Scott S. Sheppard, et al. in 2003 and given the designation S/2003 U 3.[2]
Confirmed as Uranus XXIII, it was named after the servant of Hero in William Shakespeare's play Much Ado About Nothing[3]
Orbit
Margaret stands out as the only prograde non-spherical moon of Uranus. The diagram illustrates the orbital parameters of Margaret, unique among the non-spherical moons 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 (moon) Media
Animation of discovery images showing Margaret's motion relative to background stars and galaxies
Related pages
https//ifarley.net
References
- ↑ 1.0 1.1 1.2 Scott S. Sheppard, David C. Jewitt, and Jan Kleyna An Ultradeep Survey for Irregular Satellites of Uranus: Limits to Completeness, The Astronomical Journal, 129 (2005), pages 518–525 . Preprint
- ↑ IAU Circular 8217
- ↑ Planetary names USGS.
Other websites
- Margaret Profile Archived 2015-06-10 at the Wayback Machine by NASA's Solar System Exploration
- David Jewitt pages
- Scott Sheppard pages