Philophrosyne (moon)

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Philophrosyne
Provisional or systematic name S / 2003 J 15
Central body Jupiter
Properties of the orbit
Major semi-axis 22,630,000 km
Periapsis 18,231,000 km
Apoapsis 27,029,000 km
eccentricity 0.1944
Orbit inclination 146.55 °
Orbital time 689.8 d
Mean orbital velocity 2.39 km / s
Physical Properties
Albedo 0.04
Apparent brightness 23.5 likes
Medium diameter ≈ 2.0 km
Dimensions ≈ 1.1 × 10 13 kg
Medium density 2.6 g / cm 3
Acceleration of gravity on the surface ≈ 0 m / s 2
Escape speed ≈ 0 m / s
discovery
Explorer

IFA Hawaii

Date of discovery February 6, 2003

Philophrosyne (also Jupiter LVIII ) is one of the smaller moons of the planet Jupiter .

discovery

Philophrosyne was discovered on February 6, 2003 by astronomers at the University of Hawaii and was given the provisional designation S / 2003 J 15. On August 23, 2019, the International Astronomical Union named it after Philophrosyne , a figure in Greek mythology .

Orbit data

Philophrosyne orbits Jupiter at a mean distance of 22,627,000 km in 689 days, 18 hours and 29 minutes. The track has an eccentricity of 0.1910. With an inclination of 146.5 ° from the local Laplace plane , the orbit is retrograde; that is, the moon moves around the planet against the direction of rotation of Jupiter.

Due to its orbital properties, Philophrosyne is assigned to the Ananke group , named after the Jupiter moon Ananke . Philophrosyne is the outermost member of the group.

Physical data

Philophrosyne has a diameter of about 2 km. Their density is estimated at 2.6 g / cm³. It is probably made up mainly of silicate rock. It has a very dark surface with an albedo of 0.04, i.e. that is, only 4% of the incident sunlight is reflected.

Web links

Individual evidence

  1. ↑ The results are in! Jovian moon-naming contest winners announced. Carnegie Institution for Science, August 23, 2019; accessed August 28, 2019 .
before Jupiter moons after that
Eirene (moon) Philophrosyne (moon)
 S / 2017 J 1
Well-known moons of planets and dwarf planets


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S / 2004 S 7  • S / 2004 S 12  • S / 2004 S 13  • S / 2004 S 17  • S / 2004 S 20  • S / 2004 S 21  • S / 2004 S 22  • S / 2004 S 23  • S / 2004 S 24  • S / 2004 S 25  • S / 2004 S 26  • S / 2004 S 27  • S / 2004 S 28  • S / 2004 S 29  • S / 2004 S 30  • S / 2004 S 31  • S / 2004 S 32  • S / 2004 S 33  • S / 2004 S 34  • S / 2004 S 35  • S / 2004 S 36  • S / 2004 S 37  • S / 2004 S 38  • S / 2004 S 39  • S / 2006 S 1  • S / 2006 S 3  • S / 2007 S 2  • S / 2007 S 3  • S / 2009 S 1

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Pluto

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Haumea

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Makemake

S / 2015 (136472) 1

Eris

Dysnomia