Cupid (kew'-pid, IPA: [ˈkjuːpɪd]) is an inner satellite of Uranus. It was discovered by Mark Showalter and Jack J. Lissauer in 2003 using the Hubble Space Telescope.^[2] It was named after a character in William Shakespeare's play Timon of Athens.^[3] August 25 is the 237th day of the year in the Gregorian Calendar (238th in leap years), with 128 days remaining. ... 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... In physics, an orbit is the path that an object makes, around another object, whilst under the influence of a source of centripetal force, such as gravity. ... The semi-major axis of an ellipse In geometry, the term semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolae. ... km redirects here. ... In astrodynamics, under standard assumptions any orbit must be of conic section shape. ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ... Inclination in general is the angle between a reference plane and another plane or axis of direction. ... Moons of the Solar System scaled to Earths Moon A natural satellite is an object that orbits a planet or other body larger than itself and which is not man-made. ... Atmospheric characteristics Atmospheric pressure 120 kPa Hydrogen 83% Helium 15% Methane 1. ... Diameter is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ... Area is a physical quantity expressing the size of a part of a surface. ... Square kilometre (US spelling: Square kilometer), symbol km², is an SI unit of surface area. ... Volume, also called capacity, is a quantification of how much space an object occupies. ... A cubic kilometre (symbol km³) is an SI derived unit of volume. ... Unsolved problems in physics: What causes anything to have mass? Mass is a property of a physical object that quantifies the amount of matter and energy it is equivalent to. ... The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... Density (symbol: ρ - Greek: rho) is a measure of mass per volume. ... Gravity is a force of attraction that acts between bodies that have mass. ... Acceleration is the time rate of change of velocity, and at any point on a velocity-time graph, it is given by the slope of the tangent to that point In physics or physical science, acceleration (symbol: a) is defined as the rate of change (or derivative with respect to... Space Shuttle Atlantis launches on mission STS-71 In physics, for a given gravitational field and a given position, the escape velocity is the minimum speed an object without propulsion, at that position, needs to have to move away indefinitely from the source of the field, as opposed to falling... On a prograde planet like the Earth, the sidereal day is shorter than the solar day. ... Axial tilt is an astronomical term regarding the inclination angle of a planets rotational axis in relation to its orbital plane. ... Albedo is a ratio of scattered to incident electromagnetic radiation power, most commonly light. ... In thermodynamics, temperature is the physical property of a system that underlies the common notions of hot and cold —something that is hotter has the greater temperature. ... The Kelvin scale is a thermodynamic (absolute) temperature scale where absolute zero—the lowest possible temperature where nothing could be colder and no heat energy remains in a substance—is defined as zero kelvin (0 K). ... diurnal (daily) rhythm of air pressure in northern Germany (black curve is air pressure) Atmospheric pressure is the pressure above any area in the Earths atmosphere caused by the weight of air. ... The pascal (symbol Pa) is the SI unit of pressure. ... The International Phonetic Alphabet (IPA) is a system of phonetic notation devised by linguists to accurately and uniquely represent each of the wide variety of sounds (phones or phonemes) used in spoken human language. ... In astronomy, an inner satellite is a natural satellite following a prograde, low inclination orbit inwards of the large satellites of the parent planet. ... Atmospheric characteristics Atmospheric pressure 120 kPa Hydrogen 83% Helium 15% Methane 1. ... 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... The Hubble Space Telescope (HST) is a telescope in orbit around the Earth, named after astronomer Edwin Hubble for his discovery of galaxies outside the Milky Way and his creation of Hubbles Law, which calculates the rate at which the universe is expanding. ... Wikipedia does not yet have an article with this exact name. ... Timon of Athens is a play by William Shakespeare written around 1607. ...

It is the smallest of inner Uranian satellites, crudely estimated to be only about 18 km in diameter. This and the dark surface made it too dim to be detected by the Voyager 2 cameras during its Uranus flyby in 1986. In astronomy, an inner satellite is a natural satellite following a prograde, low inclination orbit inwards of the large satellites of the parent planet. ... Voyager 2 is an unmanned interplanetary spacecraft. ... 1986 (MCMLXXXVI) was a common year starting on Wednesday of the Gregorian calendar. ...

The orbit of Cupid differs only 863 km from the orbit of the larger moon Belinda. Amazingly, compared to Mab and Perdita, the recently discovered Uranian satellites, it does not seem to be perturbed.^[1] Atmospheric pressure 0 kPa Belinda (be-lin-da) is a moon of Uranus. ... Atmospheric pressure 0 kPa Mab (mab, IPA [mæb]) is a natural satellite of Uranus. ... Atmospheric pressure 0 kPa Perdita (pur-di-ta, IPA ) is a moon of Uranus. ... Perturbation is a term used in astronomy to describe alterations to an objects orbit caused by gravitational interactions with other bodies. ...

Following its discovery, Cupid was given the temporary designation S/2003 U 2.^[2] It is also designated Uranus XXVII.^[3]

It should not be confused with the asteroid 763 Cupido. Asteroid, minor planet, and planetoid are synonyms, and are used to indicate a diverse group of small celestial bodies that drift in the solar system in orbit around the Sun. ... 763 Cupido 763 Cupido is a minor planet orbiting Sun. ...

References

2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... December 22 is the 356th day of the year (357th in leap years) in the Gregorian Calendar. ... A digital object identifier (or DOI) is a permanent identifier (permalink) given to a World Wide Web file or other Internet document so that if its Internet address changes, users will be redirected to its new address. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... August 5 is the 217th day of the year in the Gregorian Calendar (218th in leap years), with 148 days remaining. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... August 5 is the 217th day of the year in the Gregorian Calendar (218th in leap years), with 148 days remaining. ...

External links

• Hubble Uncovers Smallest Moons Yet Seen Around Uranus – Hubble Space Telescope news release (2003-09-25)

edit Uranus' natural satellites
Cordelia · Ophelia · Bianca · Cressida · Desdemona · Juliet · Portia · Rosalind · Cupid · Belinda · Perdita · Puck · Mab Miranda · Ariel · Umbriel · Titania · Oberon Francisco · Caliban · Stephano · Trinculo · Sycorax · Margaret · Prospero · Setebos · Ferdinand
See also: Rings of Uranus