S/2009 S 1

S/2009 S 1 is a "propeller moonlet" of Saturn orbiting at a distance of 117,000 km (73,000 mi), in the outer part of the B Ring, and with a diameter of 300 m (1,000 ft).[3] The moonlet was discovered by the Cassini Imaging Team during the Cronian equinox event on 26 July 2009,[4] when it cast a shadow 36 km (22 mi) long onto the B Ring. S/2009 S 1 protrudes 150 m (500 ft) north of the ring.[5] The image was taken approximately 296,000 km (184,000 mi) from Saturn.[3]

S/2009 S 1
The bright dot with a long shadow is S/2009 S 1
Discovery[1]
Discovered byCassini Imaging Team
Discovery date2009
Orbital characteristics [2]
117000 km
Satellite ofSaturn
Grouppropeller moonlet
Physical characteristics
Mean diameter
0.3 km
≈28.0

    Discovery
    A wider perspective of the image above. S/2009 S 1 is in the center. The Cassini Division is on the right.

    S/2009 S 1 was first identified by the Cassini Imaging Team[4] on 26 July 2009. It was discovered during 2009's equinox by an approximately 36 kilometres (22 mi) long shadow that it cast on the planet Saturn's B ring. This particular moon is one of the smallest moons of Saturn.

    See also

    References
    1. Discovery Circumstances from JPL
    2. S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
    3. "A Small Find Near Equinox". Cassini Solstice Mission. JPL/NASA. 7 August 2009. Retrieved 2012-01-02.
    4. "Cassini Imaging Science Team". Cassini Imaging Central Laboratory for OPerationS. Retrieved 2012-01-02.
    5. Porco, C. & the Cassini Imaging Team (2 November 2009). "S/2009 S1". IAU Circular. 9091. Retrieved 2012-01-02.
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