Perdita (moon): Difference between revisions
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| satellite_of = [[Uranus]] | | satellite_of = [[Uranus]] | ||
| mean_radius = {{val|13.3|0.7|u=km}}{{refn|name=radius}} | | mean_radius = {{val|13.3|0.7|u=km}}{{refn|name=radius}} | ||
| surface_area = ~{{val| | | surface_area = ~{{val|2200|u=km2}}{{efn|name=calculated}} | ||
| volume = ~{{val| | | volume = ~{{val|9900|u=km3}}{{efn|name=calculated}} | ||
| mass = ~{{val|4. | | mass = ~{{val|4.9|-|12|e=15|u=kg}}{{efn|name=calculated}} | ||
| density = | | density = 0.5{{sfn|French|Showalter|2012}}–1.2{{sfn|French|Showalter|2012}}{{sfn|Ćuk et al.|2022}} g/cm{{sup|3}} | ||
| surface_grav = ~{{Gr|4.93e-6|13.3}}–{{Gr| | | surface_grav = ~{{Gr|4.93e-6|13.3}}–{{Gr|11.8e-6|13.3}} [[Acceleration|m/s<sup>2</sup>]]{{efn|name=calculated}} | ||
| escape_velocity = ~{{V2|4.93e-6|13.3}}–{{V2| | | escape_velocity = ~{{V2|4.93e-6|13.3}}–{{V2|11.8e-6|13.3}} km/s{{efn|name=calculated}} | ||
| rotation = synchronous{{sfn|Karkoschka, Voyager|2001}} | | rotation = synchronous{{sfn|Karkoschka, Voyager|2001}} | ||
| axial_tilt = zero{{sfn|Karkoschka, Voyager|2001}} | | axial_tilt = zero{{sfn|Karkoschka, Voyager|2001}} | ||
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[[File:Uranus' Satellite 1986 U10 Discovery Image.jpg|thumb|left|upright|Discovery image of Perdita taken by ''Voyager 2'' on 23 January 1986. The location of the moon is indicated by the arrow on the upper right.]] | [[File:Uranus' Satellite 1986 U10 Discovery Image.jpg|thumb|left|upright|Discovery image of Perdita taken by ''Voyager 2'' on 23 January 1986. The location of the moon is indicated by the arrow on the upper right.]] | ||
The moon orbits between [[Belinda (moon)|Belinda]] and [[Puck (moon)|Puck]]. The above-mentioned Hubble measurements prove that Perdita does not follow a direct [[Kepler's laws of planetary motion|Keplerian]] motion around Uranus. Instead, it is clearly caught in a 43:44 [[orbital resonance]] with the nearby moon Belinda, and from this resonance it has been determined that Belinda's mass is 26 | The moon orbits between [[Belinda (moon)|Belinda]] and [[Puck (moon)|Puck]]. The above-mentioned Hubble measurements prove that Perdita does not follow a direct [[Kepler's laws of planetary motion|Keplerian]] motion around Uranus. Instead, it is clearly caught in a 43:44 [[orbital resonance]] with the nearby moon Belinda, and from this resonance it has been determined that Belinda's mass is 26<ref>{{Cite conference |last=French |first=Robert S. |last2=Showalter |first2=Mark R. |last3=de Pater |first3=Imke |last4=Lissauer |first4=Jack J. |date=2017-10-01 |title=Orbital and Photometric Analysis of the Inner Uranian Satellites from Hubble Images |url=https://ui.adsabs.harvard.edu/abs/2017DPS....4921419F |volume=49 |pages=214.19}}</ref> or 27{{sfn|Ćuk et al.|2022}} times that of Perdita. It is also close to an 8:7 resonance with [[Rosalind (moon)|Rosalind]].{{sfn|Karkoschka, Voyager|2001}}{{sfn|Showalter|Lissauer|2006}} | ||
Perdita belongs to the Portia group of satellites, which also includes [[Bianca (moon)|Bianca]], [[Cressida (moon)|Cressida]], [[Desdemona (moon)|Desdemona]], [[Portia (moon)|Portia]], [[Juliet (moon)|Juliet]], [[Cupid (moon)|Cupid]], Rosalind, and Belinda.{{sfn|Karkoschka, Hubble|2001}} These satellites have similar orbits and photometric properties.{{sfn|Karkoschka, Hubble|2001}} Little is known about Perdita apart from its orbit,{{sfn|Karkoschka, Voyager|2001}}{{sfn|Showalter|Lissauer|2006}} radius of 13.3 km,{{refn|name=radius|Showalter & Lissauer (2006),{{sfn|Showalter|Lissauer|2006}} as cited in Ćuk et al. (2022).{{sfn|Ćuk et al.|2022}}}} and geometric albedo of 0.08.{{sfn|Karkoschka, Hubble|2001}}{{sfn|Showalter|Lissauer|2006}} | Perdita belongs to the Portia group of satellites, which also includes [[Bianca (moon)|Bianca]], [[Cressida (moon)|Cressida]], [[Desdemona (moon)|Desdemona]], [[Portia (moon)|Portia]], [[Juliet (moon)|Juliet]], [[Cupid (moon)|Cupid]], Rosalind, and Belinda.{{sfn|Karkoschka, Hubble|2001}} These satellites have similar orbits and photometric properties.{{sfn|Karkoschka, Hubble|2001}} Little is known about Perdita apart from its orbit,{{sfn|Karkoschka, Voyager|2001}}{{sfn|Showalter|Lissauer|2006}} radius of 13.3 km,{{refn|name=radius|Showalter & Lissauer (2006),{{sfn|Showalter|Lissauer|2006}} as cited in Ćuk et al. (2022).{{sfn|Ćuk et al.|2022}}}} and geometric albedo of 0.08.{{sfn|Karkoschka, Hubble|2001}}{{sfn|Showalter|Lissauer|2006}} | ||
Revision as of 08:11, 5 June 2025
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Perdita Script error: No such module "IPAc-en". is an inner satellite of Uranus. Perdita's discovery was very complicated, as the first photographs of Perdita were taken by the Voyager 2 spacecraft in 1986, but it was not recognized from the photographs for more than a decade. In 1999, the moon was noticed by Erich Karkoschka and reported.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters". But because no further pictures could be taken to confirm its existence, it was officially demoted in 2001.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters". However, in 2003, pictures taken by the Hubble Space Telescope managed to pick up an object where Perdita was supposed to be, finally confirming its existence.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".
Following its discovery in 1999, it was given the temporary designation of S/1986 U 10.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters". It was named Perdita (Latin for 'lost') after the daughter of Leontes and Hermione in William Shakespeare's play The Winter's Tale. The moon is also designated Uranus XXV.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".
The moon orbits between Belinda and Puck. The above-mentioned Hubble measurements prove that Perdita does not follow a direct Keplerian motion around Uranus. Instead, it is clearly caught in a 43:44 orbital resonance with the nearby moon Belinda, and from this resonance it has been determined that Belinda's mass is 26[1] or 27Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters". times that of Perdita. It is also close to an 8:7 resonance with Rosalind.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".
Perdita belongs to the Portia group of satellites, which also includes Bianca, Cressida, Desdemona, Portia, Juliet, Cupid, Rosalind, and Belinda.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters". These satellites have similar orbits and photometric properties.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters". Little is known about Perdita apart from its orbit,Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters". radius of 13.3 km,Template:Refn and geometric albedo of 0.08.Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".Script error: No such module "Footnotes".Script error: No such module "Check for unknown parameters".
See also
Notes
References
Citations
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Sources
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External links
- Uranus 'Loses' a Moon: The 'New' Official Moon Count of the Solar System (Archived), Melanie Melton, The Planetary Society, 20 December 2001
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