Methone (måne)
| Methone | |
|---|---|
.jpg) | |
| Opdaget | |
| 2004, af Caeolyn C. Porco | |
| Kredsløb om Saturn | |
| Afstand til Saturn (massecenter) |
|
| Halve storakse | 194 000 km |
| Halve lilleakse | 194 000 km |
| Excentricitet | 0 |
| Siderisk omløbstid | 1d 0t 11m 57,0s |
| Synodisk periode | – |
| Omløbshastighed |
|
| Banehældning | – |
| Periapsisargument; ω | – ° |
| Opstigende knudes længde; Ω | – ° |
| Omgivelser | |
| – | |
| Fysiske egenskaber | |
| Diameter | 3,0 km |
| Fladtrykthed | – |
| Overfladeareal | – km² |
| Rumfang | – km³ |
| Masse | 1,650·1013 kg |
| Massefylde | 1170 kg/m³ |
| Tyngdeacc. v. ovfl. | 0,000 48 m/s² |
| Undvigelseshastighed v. ækv. | – km/t |
| Rotationstid | – |
| Aksehældning | ? |
| Nordpolens rektascension | – |
| Nordpolens deklination | – ° |
| Magnetfelt | – |
| Albedo | 4 % |
| Temperatur v. ovfl. | Gnsn. – °C Min. – °C Maks. – °C |
| Atmosfære | |
| Atmosfæretryk | 0 hPa |
| Atmosfærens sammensætning | – |
Methone er en af planeten Saturns måner: Den blev opdaget 2004 ved hjælp af rumsonden Cassini, og lige efter opdagelsen fik den den midlertidige betegnelse S/2004 S 1. I 2006 ratificerede den Internationale Astronomiske Union navnet Methone, efter en af giganten Alkyoneus' syv smukke døtre fra den græske mytologi. Derudover har månen fået designationen Saturn XXXII.
Methones omløbsbane ligger, lige som månen Pallene, mellem Mimas og Enceladus. Endvidere ser det ud til at Mimas perturberer ("forstyrrer") Methones bane.
Methone
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Methone (frame 15).jpg
Cropped frame number 15 from animation Image:Methone.gif, from which Methone, a moon of Saturn was discovered. See the GIF file for original caption.
Cropped frame number 15 from animation Image:Methone.gif, from which Methone, a moon of Saturn was discovered. See the GIF file for original caption.
Methone - Best Image From Cassini.jpg
N00189072.jpg was taken on May 20, 2012 and received on Earth May 21, 2012. The camera was pointing toward METHONE, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image rotated so that north is up. Original image had a pixel scale of 26.72 meters per pixel, but this has been enlarged by 2x to improve feature visibility.
N00189072.jpg was taken on May 20, 2012 and received on Earth May 21, 2012. The camera was pointing toward METHONE, and the image was taken using the CL1 and CL2 filters. This image has not been validated or calibrated. A validated/calibrated image will be archived with the NASA Planetary Data System in 2013. Image rotated so that north is up. Original image had a pixel scale of 26.72 meters per pixel, but this has been enlarged by 2x to improve feature visibility.