Polydeuces (moon)

Polydeuces

Polydeuces captured by the Cassini spacecraft
Provisional or systematic name	S / 2004 S 5
Central body	Saturn
Properties of the orbit
Major semi-axis	377,400 km
Periapsis	unknown
Apoapsis	unknown
eccentricity	0.0192
Orbit inclination	0.18 °
Orbital time	2.737 d
Mean orbital velocity	10.0 km / s
Physical Properties
Apparent brightness	25 likes
Medium diameter	≈ 2.6 km
Dimensions	≈ 4.4960 × 10 ¹² kg
surface	21.24 km ²
Medium density	0.5 g / cm ³
Sidereal rotation	2.737 d
Acceleration of gravity on the surface	0.00018 m / s ²
Escape speed	≈ 0.6 m / s
discovery
Explorer	Carolyn Porco , Cassini Imaging Science Team
Date of discovery	October 21, 2004

Polydeuces (also Saturn XXXIV) is one of the smaller moons of the planet Saturn . It is a Trojan moon that moves in the same orbit as the larger moon Dione .

discovery

The discovery of Polydeuces on images taken by the Cassini spacecraft on October 21, 2004 was announced on November 8, 2004 by Carolyn Porco and the Cassini Imaging Science Team. Polydeuces was initially given the provisional designation S / 2004 S 5. In January 2005 the moon was then named after Polydeuces .

Orbit data

Polydeuces orbits Saturn at a mean distance of about 377,200 km in 2.737 days. It is one of two small moons on the same orbit as the large moon Dione. Polydeuces follows Dione at an angular distance of 60 ° in the following Lagrangian point L ₅ . In the leading Lagrangian point L ₄ , the moon Helene Dione runs ahead at an angle of 60 °.

Structure and physical data

Polydeuces has an irregular shape with axis lengths of 3.0 × 2.4 × 2.0 km.

Web links

Commons : Polydeuces (moon) - collection of images, videos and audio files

Polydeuces: By the Numbers. At: solarsystem.nasa.gov
IAUC 8432: Satellites and Rings of Saturn November 8, 2004 (discovery)
IAUC 8471: Satellites of Saturn January 21, 2005 (numbering and naming)

Individual evidence

^ Saturnian Satellite Fact Sheet. At: nssdc.gsfc.nasa.gov (Last update: October 13, 2015)

further inside	Saturn moons	further outside
Helene	Semi- major axis (km) Polydeuces 377.400	Rhea

[1] Saturnian Satellite Fact Sheet. At: nssdc.gsfc.nasa.gov (Last update: October 13, 2015)


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