Margaret (moon)
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| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| Discovered by | Scott S. Sheppard, and David C. Jewitt |
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| 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. |
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| 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]
Contents |
[change] 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.
[change] See also
[change] 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.
[change] Other websites
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| Moons | Ariel ·Belinda ·Bianca ·Caliban ·Cordelia ·Cressida ·Cupid ·Desdemona ·Ferdinand ·Francisco ·Juliet ·Mab ·Margaret ·Miranda ·Oberon ·Ophelia ·Perdita ·Portia ·Prospero ·Puck ·Rosalind ·Setebos ·Stephano ·Sycorax ·Titania ·Trinculo ·Umbriel Other: Arieal features ·Miranda features ·Oberon features ·Titania features ·Puck Craters ·Umbriel craters · Miranda's Verona Rupes ·Umbriel Crater Wunda |
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| Characteristics | Atmosphere ·Rings of Uranus | |
| Discovery | William Herschel ·William Lassell | |
| Exploration | Voyager program ·Voyager 2 | |
| Other | 15 Orionis ·Uranus-crosser asteroid ·In fiction | |
