Pasiphaë

Discovery
Discovered by	P. J. Melotte
Discovered on	January 27, 1908
Orbital characteristics
Mean radius	23,624,000 km
Eccentricity	0.4090
Orbital period	743.63 d
Inclination	151.431°
Is a satellite of	Jupiter
Physical characteristics
Mean diameter	60 km
Mass	3.0×1017 kg
Mean density	2.6 g/cm3
Surface gravity	0.022 m/s2
Escape velocity	0.036 km/s
Rotation period	?
Axial tilt	?°
Albedo	0.04
Surface temp.	~171 K
Atmospheric pressure	no atmosphere

Pasiphaë ("pah SIF a ee") is a moon of Jupiter. It was discovered in 1908 by Philibert Jacques Melotte and later named after the mythological Pasiphae, wife of Minos and mother of the Minotaur from Greek legend.

It gives its name to the Pasiphaë group, irregular retrograde moons orbiting Jupiter at distances ranging between 22.8 and 24.1 Gm, and with inclinations ranging between 144.5° and 158.3°.

Pasiphaë did not receive its present name until 1975; before then, it was simply known as "Jupiter VIII".

It was first spotted on a plate taken at the Royal Greenwich Observatory on the night of February 28, 1908. Inspection of previous plates found it as far back as January 27. It received the provisional designation 1908 CJ since it was not clear whether it was an asteroid or a moon of Jupiter. The recognition of the latter case came by April 10.

External links

• Monthly Notices of the Royal Astronomical Society, Vol. 68, p.373 (March 1908)
• Monthly Notices of the Royal Astronomical Society, Vol. 68, p.456 (April 1908)
• Publications of the Astronomical Society of the Pacific, Vol. 20, No. 120, p.184 (June 1908)
• International Astronomical Union Circular #2846