Eirene (moon)

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Eirene
Provisional or systematic name S / 2003 J 5
Central body Jupiter
Properties of the orbit
Major semi-axis 23,668,000 km
Periapsis 18,422,000 km
Apoapsis 28,914,000 km
eccentricity 0.222
Orbit inclination 163.1 °
Orbital time 743.88 d
Mean orbital velocity 2.31 km / s
Physical Properties
Albedo 0.04
Apparent brightness 22.4 mag
Medium diameter ≈ 4 km
Dimensions ≈ 9.0 · 10 13 kg
Medium density 2.6 g / cm 3
Acceleration of gravity on the surface ≈ 0.0015 m / s 2
Escape speed ≈ 2.5 m / s
discovery
Explorer

University of Hawaii

Date of discovery February 6, 2003

Eirene (also Jupiter LVII ) is one of the smaller moons of the planet Jupiter .

discovery

Eirene was discovered by astronomers at the University of Hawaii on February 6, 2003 and was given the provisional designation S / 2003 J 5. On August 23, 2019, she was named by the International Astronomical Union after Eirene , the goddess of peace in Greek mythology .

Orbit data

Eirene orbits Jupiter at an average distance of 23.668 million km in just 744 days. The track has an eccentricity of 0.222. With an inclination of 163.1 °, the orbit is retrograde ; that is, the moon moves around the planet against the direction of rotation of Jupiter.

Due to its orbit characteristics, Eirene is assigned to the Carme Group , named after the Jupiter moon Carme .

Physical data

Eirene has a diameter of about 4 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. Their apparent brightness is 22.4 m .

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
S / 2011 J 2 Eirene (moon)
 Philophrosyne (moon)
Well-known moons of planets and dwarf planets


earth

moon

Mars

Deimos  • Phobos

Jupiter
( list )

Adrastea  • Aitne  • Amalthea  • Ananke  • Aoede  • Arche  • Autonoe  • Callirrhoe  • Carme  • Carpo  • Chaldene  • Cyllene  • Dia  • Eirene  • Elara  • Erinome  • Ersa  • Euanthe  • Eucelade  • Eupheme  • Euporia  • Europe  • Eurydome  • Ganymed  • Harpalyke  • Hegemone  • Helike  • Hermippe  • Herse  • Himalia  • Io  • Iocaste  • Isonoe  • Kale  • Kallichore  • Callisto  • Kalyke  • Kore  • Leda  • Lysithea  • Megaclite  • Metis  • Mneme  • Orthosie  • Pandia  • Pasiphae  • Pasithee  • Philophrosyne  • Praxidike  • Sinope  • Sponde  • Taygete  • Thebe  • Thelxinoe  • Themisto  • Thyone  • Valetudo
S / 2003 Y 10  • S / 2003 Y 12  • S / 2003 Y 16  • S / 2003 Y 18  • S / 2003 Y 19  • S / 2003 Y 2  • S / 2003 Y 23  • S / 2003 Y 4  • S / 2003 Y 9  • S / 2010 Y 1  • S / 2010 Y 2  • S / 2011 Y 1  • S / 2011 Y 2  • S / 2016 Y 1  • S / 2017 Y 1  • S / 2017 Y 2  • S / 2017 Y 3  • S / 2017 Y 5  • S / 2017 Y 6  • S / 2017 Y 7  • S / 2017 Y 8  • S / 2017 Y 9

Saturn
( list )

Aegaeon  • Aegir  • Albiorix  • Anthe  • Atlas  • bebhionn  • Bergelmir  • Bestla  • Calypso  • Daphnis  • Dione  • Enceladus  • Epimetheus  • erriapus  • Farbauti  • Fenrir  • Fornjot  • Greip  • Hati  • Helene  • Hyperion  • hyrrokkin  • Iapetus  • Ijiraq  • Janus  • Jarnsaxa  • Kari  • Kiviuq  • Loge  • Methone  • Mimas  • Mundilfari  • Narvi  • Paaliaq  • Pallene  • Pan  • Pandora  • Phoebe  • Polydeuces  • Prometheus  • Rhea  • Siarnaq  • Skathi  • Skoll  • Surtur  • Suttungr  • Tarqeq  • Tarvos  • Telesto  • Tethys  • Thrymr  • Titan  • Ymir
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

Uranus
( list )

Ariel  • Belinda  • Bianca  • Caliban  • Cordelia  • Cressida  • Cupid  • Desdemona  • Ferdinand  • Francisco  • Juliet  • Mab  • Margaret  • Miranda  • Oberon  • Ophelia  • Perdita  • Portia  • Prospero  • Puck  • Rosalind  • Setebos  • Stephano  • Sycorax  • Titania  • Trinculo  • Umbriel

Neptune
( list )

Despina  • Galatea  • Halimede  • Hippocamp  • Laomedeia  • Larissa  • Naiad  • Nereid  • Neso  • Proteus  • Psamathe  • Sao  • Thalassa  • Triton

Pluto

Charon  • Hydra  • Kerberos  • Nix  • Styx

Haumea

Hi'iaka  • Namaka

Makemake

S / 2015 (136472) 1

Eris

Dysnomia