Philophrosyne (moon)
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 | |
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
- MPEC 2003-G17: S / 2003 J 15 April 3, 2003 (discovery)
- IAUC 8116: Satellites of Jupiter and Saturn April 11, 2003 (discovery)
- MPEC 2017-L09: S / 2003 J 15 June 5, 2017 (rediscovery)
Individual evidence
- ↑ 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 |