portia (moon)

b>Portia
bgcolor="#ffc0c0" colspan="2" \| Discovery
align="left" \| Discovered by	Voyager 2
align="left" \| Discovered in	1986
bgcolor="#ffc0c0" colspan="2" \| Orbital characteristics
align="left" \| Mean radius	66097 km
align="left" \| Eccentricity	?
align="left" \| Orbital period	0.513196d
align="left" \| Inclination	0.09°
align="left" \| Is a satellite of	Uranus
bgcolor="#ffc0c0" colspan="2" \| Physical characteristics
align="left" \| Mean diameter	135.2 km
align="left" \| Surface area	? km²
align="left" \| Mass	Unknown kg
align="left" \| Mean density	Unknown g/cm³
align="left" \| Surface gravity	? m/s²
align="left" \| Rotation period	?
align="left" \| Axial tilt	?°
align="left" \| Albedo	0.07
align="left" \| Surface temp.	{\| cellspacing="0" cellpadding="2" border="0"
min !! mean !! max
? K	? K	? K	}
align="left" \| Atmospheric pressure	0 kPa

Portia (por'-sha) is a moon of Uranus. Very little is known about it. It is named after Portia, the heroine of William Shakespeare's play The Merchant of Venice. Since it is below Uranus' synchronous orbit radius, Portia's orbit is slowly decaying due to tidal forces and it will one day break up into a planetary ring or impact on Uranus' surface. It was discovered from the images taken by Voyager 2 on 1986-01-03, and was given the temporary designation S/1986 U 1. It is also designated Uranus XII.

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