Galatea (måne)
- För andra betydelser, se Galatea (olika betydelser).
| Galatea | |
 Galatea | |
| Upptäckt | |
|---|---|
| Upptäckare | Stephen P. Synnott[1], Voyager 2 |
| Upptäcktsdatum | Juli, 1989 |
| Uppkallad efter | Galatea |
| Omloppsbana | |
| Excentricitet | 0,00004 ± 0,00009 |
| Siderisk omloppstid | 0,42874431 ± 0,00000001 d |
| Inklination | 0,052 ± 0,011° |
| Måne till | Neptunus |
| Fysikaliska data | |
| Dimensioner | 204×184×144 km (±~10 km)[2] |
| Massa | 2,12 ± 0,08 × 1018 [3] (uppskattad på densiteten) |
| Medeldensitet | 0,75 ± 0,1 g/cm³ (uppskattad) |
| Rotationsperiod | Troligtvis bunden |
| Albedo | 0,08[2] |
| Yttemperatur | Medel: ~51 (uppskattad) |
| Skenbar magnitud | +21,85 |
| Hitta fler artiklar om astronomi med | |
Galatea (grekiska Γαλατεία) är en av Neptunus månar.
Externa länkar
Referenser
- ^ Planet Neptune Data
- ^ [a b] E. Karkoschka (2003). ”Sizes, shapes, and albedos of the inner satellites of Neptune”. Icarus 162: sid. 400. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2003Icar..162..400K&db_key=AST&data_type=HTML&format=&high=444b66a47d11635.
- ^ (PDF)C.C. Porco (1991). ”An Explanation for Neptune's Ring Arcs”. Science 253: sid. 995. http://www.jstor.org/cgibin/jstor/printpage/00368075/di002156/00p0314k/0.pdfbackcontext=page&dowhat=Acrobat&config=jstor&userID=92321146@uva.nl/01cc99333c00501e2012e&0.pdf.
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Media som används på denna webbplats
Galatea moon.jpg
Galatea as seen by Voyager 2. The image is smeared due to the combination of long exposure needed at this distance from the Sun, and the rapid relative motion of Galatea and Voyager. Hence, Galatea appears more elongated than in reality.
Galatea as seen by Voyager 2. The image is smeared due to the combination of long exposure needed at this distance from the Sun, and the rapid relative motion of Galatea and Voyager. Hence, Galatea appears more elongated than in reality.