Orthosie (moon)

Orthosie /ɔːrˈθoʊziː/, also known as Jupiter XXXV, is a natural satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2001, and given the temporary designation S/2001 J 9.^[7][1]

Orthosie

Discovery image of Orthosie by the Canada-France-Hawaii Telescope in December 2001
Discovery [1]
Discovered by	Scott S. Sheppard David C. Jewitt Yanga R. Fernandez
Discovery site	Mauna Kea Observatory
Discovery date	11 December 2001
Designations
Designation	Jupiter XXXV
Pronunciation	/ɔːrˈθoʊziː/
Named after	Ορθωσία Orthōsia
Alternative names	S/2001 J 9
Adjectives	Orthosian[2] /ɔːrˈθoʊʒiən/[3]
Orbital characteristics [4]
Epoch 17 December 2020 (JD 2459200.5)
Observation arc	16.29 yr (5,949 days)
Semi-major axis	0.1415163 AU (21,170,540 km)
Eccentricity	0.4837243
Orbital period (sidereal)	–629.29 d
Mean anomaly	333.61997°
Mean motion	0° 34m 19.449s / day
Inclination	148.48740° (to ecliptic)
Longitude of ascending node	287.90005°
Argument of perihelion	261.21085°
Satellite of	Jupiter
Group	Ananke group
Physical characteristics[5]
Mean diameter	2 km
Albedo	0.04 (assumed)
Apparent magnitude	23.1[6]
Absolute magnitude (H)	16.6[4]

Orthosie is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 21,075,662 km in 625.07 days, at an inclination of 146.46° to the ecliptic (143° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.3376.^[8]

It was named in August 2003 after Orthosie, the Greek goddess of prosperity and one of the Horae.^[9] The Horae (Hours) were daughters of Zeus and Themis.

Orthosie belongs to the Ananke group.