Margaret (moon)
moon of Uranus
| 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
change
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.
Related pages
changehttps//ifarley.net
References
change- ↑ 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
change- Margaret Profile Archived 2015-06-10 at the Wayback Machine by NASA's Solar System Exploration
- David Jewitt pages
- Scott Sheppard pages