Naiad and Proteus are two of the thirteen moons of which planet?
"visit, but the close inspection revealed that the ring systems were full circle and intact, and a total of four rings were counted. ""Voyager 2"" discovered six new small moons orbiting Neptune's equatorial plane, and they were named Naiad, Thalassa, Despina, Galatea, Larissa and Proteus. Only three of Neptune's moons were photographed in detail: Proteus, Nereid, and Triton; of which the last two were the only Neptunian moons known prior to the visit. Proteus turned out to be an ellipsoid, as large as gravity allows an ellipsoid body to become without rounding into a sphere. It appeared very dark in"
"Naiad (moon) Naiad ( or ; ), also known as Neptune III, is the innermost satellite of Neptune, named after the Naiads of Greek legend. Naiad was discovered sometime before mid-September 1989 from the images taken by the ""Voyager 2"" probe. The last moon to be discovered during the flyby, it was designated S/1989 N 6. The discovery was announced on September 29, 1989, in the IAU Circular No. 4867, but the text only talks of ""25 frames taken over 11 days"", giving a discovery date of sometime before September 18. The name was given on 16 September 1991. Naiad"
"to the planet. Proteus is the second-largest moon of Neptune. It is about 420 kilometres in diameter, larger than Nereid, the second to be discovered. It was not discovered by Earth-based telescopes because it is so close to Neptune that it is lost in the glare of reflected sunlight. The surface of Proteus is dark—its geometrical albedo is about 10%. The color of its surface is neutral as the reflectivity does not change appreciably with the wavelength from violet to green. In the near-infrared around 2 μm Proteus's surface becomes less reflective, pointing to a possible presence of complex organic"
"Nereid (moon) Nereid is the third-largest moon of Neptune. It has a highly eccentric orbit. It was the second moon of Neptune to be discovered, by Gerard Kuiper in 1949. Nereid was discovered on 1 May 1949 by Gerard P. Kuiper on photographic plates taken with the 82-inch telescope at the McDonald Observatory. He proposed the name in the report of his discovery. It is named after the Nereids, sea-nymphs of Greek mythology and attendants of the god Neptune. It was the second and last moon of Neptune to be discovered before the arrival of Voyager 2 (not counting a"
"but Naiad was not located. Hubble has the ability to detect all the known satellites and possible new satellites even dimmer than those found by ""Voyager 2"". On October 8, 2013 the SETI Institute announced that Naiad had been located in archived Hubble imagery from 2004. The suspicion that the loss of positioning was due to considerable errors in Naiad's ephemeris proved correct as Naiad was ultimately located 80 degrees from its expected position. Naiad (moon) Naiad ( or ; ), also known as Neptune III, is the innermost satellite of Neptune, named after the Naiads of Greek legend. Naiad"
"compounds such as hydrocarbons or cyanides. These compounds may be responsible for the low albedo of the inner Neptunian moons. Although Proteus is usually thought to contain significant amounts of water ice, it has not been detected spectroscopically on the surface. The shape of Proteus is close to a sphere with a radius of about 210 km, although deviations from the spherical shape are large—up to 20 km; scientists believe it is about as large as a body of its density can be without being pulled into a perfect spherical shape by its own gravity. Saturn's moon Mimas has an"
"Nereid is only moderately elongated which disfavours forced precession of the rotation. The thermal model also indicates that the surface roughness of Nereid is very high, likely similar to the Saturnian moon Hyperion. Among the remaining irregular moons, Sao and Laomedeia follow prograde orbits, whereas Halimede, Psamathe and Neso follow retrograde orbits. Given the similarity of their orbits, it was suggested that Neso and Psamathe could have a common origin in the break-up of a larger moon. Psamathe and Neso have the largest orbits of any natural satellites discovered in the Solar system to date. They take 25 years to"
"thousand minor planets. ""Prometheus"" orbits the Sun in the outer main-belt at a distance of 2.6–3.2 AU once every 5.00 years (1,827 days). Its orbit has an eccentricity of 0.10 and an inclination of 3° with respect to the ecliptic. According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, ""Prometheus"" measures 14.2 kilometers in diameter, and its surface has an albedo of 0.126. As of 2017, its spectral type, rotation period and shape remain unknown. This minor planet was named for Prometheus, a Titan from Greek mythology, who stole the fire from"
"Creusa (Naiad) In Greek mythology, Creusa (; ""Kreousa"" ""princess"" ) was a Naiad and daughter of Gaia. She bore Hypseus, future king of the Lapiths and Stilbe to the river god Peneus. Through Hypseus she was grandmother of Cyrene, one of the best known lovers of Apollo while her daughter Stilbe gave birth to twin sons to Apollo. These sons were Lapithes and Centaurus progenitors of the Lapiths and the Centaurs. """"...in the renowned glens of Mt. Pindus a Naiad bore him [Hypseus], Creusa the daughter of Gaia, delighting in the bed of the river-god Peneius."""" """"He [Peneus] lay with"
"in carbon. 213 Lilaea Lilaea (minor planet designation: 213 Lilaea) is a large main belt asteroid. It was discovered by German-American astronomer C. H. F. Peters on February 16, 1880, in Clinton, New York and was named after Lilaea, a Naiad in Greek mythology. Photometric observations of this asteroid in 1986 gave a light curve with a period of 8.045 ± 0.008 hours and a brightness variation of 0.20 ± 0.01 in magnitude. The curve is asymmetrical with two distinct minima. This object has a spectrum that matches an F-type asteroid classification. As with C-type asteroids, its composition is primitive"
"Prometheus (moon) Prometheus is an inner satellite of Saturn. It was discovered in 1980 (some time before October 25) from photos taken by the ""Voyager 1"" probe, and was provisionally designated . In late 1985 it was officially named after Prometheus, a Titan in Greek mythology. It is also designated (16). Pronunciation for ""Prometheus"" is , ; Greek: ""Προμηθεύς"". Prometheus is extremely elongated, measuring approximately . It has several ridges and valleys and a number of impact craters of about diameter are visible, but it is less cratered than nearby Pandora, Epimetheus, and Janus. From its very low density and"
"213 Lilaea Lilaea (minor planet designation: 213 Lilaea) is a large main belt asteroid. It was discovered by German-American astronomer C. H. F. Peters on February 16, 1880, in Clinton, New York and was named after Lilaea, a Naiad in Greek mythology. Photometric observations of this asteroid in 1986 gave a light curve with a period of 8.045 ± 0.008 hours and a brightness variation of 0.20 ± 0.01 in magnitude. The curve is asymmetrical with two distinct minima. This object has a spectrum that matches an F-type asteroid classification. As with C-type asteroids, its composition is primitive and rich"
"dome on its floor a few kilometres high. Pharos is the only named surface feature on this moon: the name is Greek and refers to the island where Proteus reigned. In addition to Pharos there are several craters 50–100 km in diameter and many more with diameters less than 50 km. The second landform found on Proteus is linear features such as scarps, valleys, and grooves. The most prominent one runs parallel to the equator to the west of Pharos. These features likely formed as a result of the giant impacts, which formed Pharos and other large craters or as"
"in 2012. There are two faint deep-sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December. Though strongly associated with the Classical Greek uranographic tradition, Canis Minor originates from ancient Mesopotamia. Procyon and Gomeisa were called ""MASH.TAB.BA"" or ""twins"" in the ""Three Stars Each"" tablets, dating to around 1100 BC. In the later ""MUL.APIN"", this name was also applied to the pairs of Pi and Pi Orionis and Zeta and Xi Orionis. The meaning of ""MASH.TAB.BA"" evolved as well, becoming the twin deities Lulal and Latarak, who are on the"
"Ananke (moon) Ananke ( ; ) is a retrograde irregular moon of Jupiter. It was discovered by Seth Barnes Nicholson at Mount Wilson Observatory in 1951 and is named after the mythological Ananke, the personification of Necessity, and the mother of the Moirai (Fates) by Zeus. The adjectival form of the name is ""Anankean"". Ananke did not receive its present name until 1975; before then, it was simply known as . It was sometimes called ""Adrastea"" between 1955 and 1975 (Adrastea is now the name of another satellite of Jupiter). Ananke gives its name to the Ananke group, retrograde irregular"
"is markedly different from minor planets of the outer solar system, centaurs Pholus, Chiron and Chariklo, suggesting that Nereid formed around Neptune rather than being a captured body. Halimede, which has similar colours, may be a fragment of Nereid that was broken off during a collision. The only spacecraft to visit Nereid was ""Voyager 2"", which passed it at a distance of between 20 April and 19 August 1989. ""Voyager 2"" obtained 83 images with observation accuracies of to . Prior to ""Voyager 2""'s arrival, observations of Nereid had been limited to ground-based observations that could only establish its intrinsic"
"the nymph named Creüsa and begat as children Hypseus and Stilbê, and with the latter Apollo lay and begat Lapithes and Centaurus."""" Creusa (Naiad) In Greek mythology, Creusa (; ""Kreousa"" ""princess"" ) was a Naiad and daughter of Gaia. She bore Hypseus, future king of the Lapiths and Stilbe to the river god Peneus. Through Hypseus she was grandmother of Cyrene, one of the best known lovers of Apollo while her daughter Stilbe gave birth to twin sons to Apollo. These sons were Lapithes and Centaurus progenitors of the Lapiths and the Centaurs. """"...in the renowned glens of Mt. Pindus"
"Thriae The Thriae (; ""Thriaí"") were nymphs, three virginal sisters, one of a number of such triads (called ""maiden trinities"" by Jane Ellen Harrison) in Greek mythology. They were named ""Melaina"" (""The Black""), ""Kleodora"" (""Famed for her Gift""), and ""Daphnis"" (""Laurel"") or ""Corycia"". They were the three Naiads (nymphs) of the sacred springs of the Corycian Cave of Mount Parnassus in Phocis. It was Corycia who was the sister after whom the Corycian Cave was named. She was the mother of Lycoreus with Apollo. Kleodora was loved by Poseidon, and with Poseidon (or Kleopompos) was the mother of Parnassos, who"
"small regular satellites, all of which have prograde orbits in planes that lie close to Neptune's equatorial plane; some of these orbit among Neptune's rings. The largest of them is Proteus. They were re-accreted from the rubble disc generated after Triton's capture after the Tritonian orbit became circular. Neptune also has six more outer irregular satellites other than Triton, including Nereid, whose orbits are much farther from Neptune and at high inclination: three of these have prograde orbits, while the remainder have retrograde orbits. In particular, Nereid has an unusually close and eccentric orbit for an irregular satellite, suggesting that"
"on the structure of the Kuiper belt. Neptune has 14 known moons. Triton is the largest Neptunian moon, comprising more than 99.5% of the mass in orbit around Neptune, and it is the only one massive enough to be spheroidal. Triton was discovered by William Lassell just 17 days after the discovery of Neptune itself. Unlike all other large planetary moons in the Solar System, Triton has a retrograde orbit, indicating that it was captured rather than forming in place; it was probably once a dwarf planet in the Kuiper belt. It is close enough to Neptune to be locked"
"surface is dark, neutral in color, and heavily cratered. Proteus's largest crater is Pharos, which is more than 230 km in diameter. There are also a number of scarps, grooves, and valleys related to large craters. Proteus is probably not an original body that formed with Neptune. It could have accreted later from the debris formed when the largest Neptunian satellite Triton was captured. Proteus was discovered from the images taken by ""Voyager 2"" space probe two months before its Neptune flyby in August 1989. It received the temporary designation S/1989 N 1. Stephen P. Synnott and Bradford A. Smith"
"Hypseus, a king of the Lapiths, married Chlidanope, a naiad, who bore him Cyrene. Aristaeus had more than ordinary mortal experience with the naiads: when his bees died in Thessaly, he went to consult them. His aunt Arethusa invited him below the water's surface, where he was washed with water from a perpetual spring and given advice. St. Charles Avenue in New Orleans was formerly known as Nyades Street, and is parallel to Dryades Street. Naiad In Greek mythology, the Naiads (; Greek: Ναϊάδες) are a type of female spirit, or nymph, presiding over fountains, wells, springs, streams, brooks and"
"the gods. The name has also been given to a moon of Saturn, Prometheus (moon), discovered by the Voyager 1 spacecraft in 1980. The asteroid 1810 Epimetheus is named after his brother. The official naming citation was published by the Minor Planet Center before November 1977 (). 1809 Prometheus 1809 Prometheus ( ), provisional designation , is an asteroid from the outer region of the asteroid belt, approximately 14 kilometers in diameter. Discovered during the Palomar–Leiden survey in 1960, it was named after Prometheus from Greek mythology. It was discovered on 24 September 1960, by the Dutch astronomer couple Ingrid"
"away from Larissa since then because the former two are outside Neptune-synchronous orbit (Neptune's rotational period is 0.6713 day) and are thus being tidally accelerated, while Larissa is within and is being tidally decelerated. When the moon was numbered as Neptune XIV, it remained without an official name. The discovery team plans to submit a name proposal to the International Astronomical Union based on a figure from Greco-Roman mythology with a relationship to Poseidon or Neptune, the god of the sea, consistent with the naming of other moons of Neptune. Among the names under consideration is Polyphemus, the gigantic one-eyed"
"(Sun), Selene (Moon), and Eos (Dawn), and from Crius and Eurybia came Astraios, Pallas, and Perses. From Eos and Astraios came the winds: Zephyrus, Boreas and Notos, Eosphoros (Dawn-bringer, i.e. Venus, the Morning Star), and the Stars. From Pallas and the Oceanid Styx came Zelus (Envy), Nike (Victory), Cratos (Power), and Bia (Force). From Coeus and Phoebe came Leto and Asteria, who married Perses, producing Hekate, and from Cronus and Rhea came Hestia, Demeter, Hera, Poseidon, Hades, and Zeus. The Titan Iapetos married the Oceanid Clymene and produced Atlas, Menoetius, Prometheus, and Epimetheus. Zeus married seven wives. His first wife"
"Neso (moon) Neso ( ; Greek: ""Νησώ""), also known as Neptune XIII, is the outermost known natural satellite of Neptune. It is an irregular moon discovered by Matthew J. Holman, Brett J. Gladman, ""et al."" on August 14, 2002, though it went unnoticed until 2003. Neso orbits Neptune at a distance of more than 48 Gm (million km), making it (as of 2015) the most distant known moon of any planet. At apocenter, the satellite is more than 72 Gm from Neptune. This distance is great enough to exceed Mercury's aphelion, which is approximately 70 Gm from the Sun. Neso"
"orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's Lagrangian point, 60° behind its orbit . It is also a non-family asteroid of the Jovian background population. It orbits the Sun at a distance of 4.9–5.5 AU once every 11 years and 10 months (4,335 days; semi-major axis of 5.2 AU). Its orbit has an eccentricity of 0.06 and an inclination of 20° with respect to the ecliptic. This minor planet was named from Greek mythology after king Priam's herald Idaios, who tells him that Paris and Menelaus want to start a duel."
"Asia (mythology) In Greek mythology, Asia (Ancient Greek: Ἀσία) was a one of the Oceanids, daughters of Oceanus and Tethys. According to Apollodorus, she was the wife of the Titan Iapetus, and mother of Atlas, Prometheus, Epimetheus and Menoetius although Hesiod gives the name of another Oceanid, Clymene, as their mother. It is possible that the name ""Asia"" became preferred over Hesiod's ""Clymene"" to avoid confusion with the Clymene who was mother of Phaethon by Helios in some accounts and must have been perceived as a distinct figure. Herodotus records the tradition that the continent ""Asia"" was named after Asia"
"Melite (naiad) In Greek mythology, Melite (; Ancient Greek: Μελίτη) was one of the Naiads, daughter of the river god Aegaeus, and one of the many loves of Zeus and his son Heracles. Given the choice, she chose Heracles over Zeus who went off in search of other pursuits. She gave birth to Hercules's son Hyllus; some suggest that he was a figure distinct from Hyllus, the son of Heracles by Deianeira. Heracles tried to find refuge on the mythical island of Scheria, widely considered to be the island of Corfu in modern Greece, after the murder of his children."
"Amalthea (moon) Amalthea ( ; ) is the third moon of Jupiter in order of distance from the planet. It was discovered on 9 September 1892, by Edward Emerson Barnard and named after Amalthea, a nymph in Greek mythology. It is also known as . Amalthea is in a close orbit around Jupiter and is within the outer edge of the Amalthea Gossamer Ring, which is formed from dust ejected from its surface. From its surface, Jupiter would appear 46.5 degrees in diameter. Amalthea is the largest of the inner satellites of Jupiter. Irregularly shaped and reddish in color, it"
"that are more massive than Eris are the Moon, the four Galilean moons of Jupiter (Io, Europa, Ganymede, and Callisto), one moon of Saturn (Titan), and one moon of Neptune (Triton). The others are six moons of Saturn (Mimas, Enceladus, Tethys, Dione, Rhea, and Iapetus), five moons of Uranus (Miranda, Ariel, Umbriel, Titania, and Oberon), and one moon of Pluto (Charon). There are additional possibilities among TNOs, including Dysnomia orbiting Eris. Alan Stern calls these moons ""satellite planets"", one of three categories of planet together with dwarf planets and classical planets. The term ""planemo"" (""planetary-mass object"") covers all three. In"
"the Naiad Pronoe and had by her a son Aegialus. Caunus became king of the land; when he died, Aegialus gathered all the people from scattered settlements in a newly founded city which he named Caunus after his father. Kaunos (mythology) In Greek mythology, Caunus or Kaunos () was a son of Miletus, grandson of Apollo and brother of Byblis. Caunus became the object of his own sister's passionate love. From some accounts it appears that Caunus was the first to develop the affection towards her; others describe Byblis' feelings as unrequited. All sources agree, however, that Caunus chose to"
"and the physical characteristics known so far, Ananke is thought to be the largest remnant of an original break-up forming the Ananke group. In the visible spectrum, Ananke appears neutral to light-red (colour indices B-V=0.90 V-R=0.38). The infrared spectrum is similar to P-type asteroids but with a possible indication of water. Sources Ananke (moon) Ananke ( ; ) is a retrograde irregular moon of Jupiter. It was discovered by Seth Barnes Nicholson at Mount Wilson Observatory in 1951 and is named after the mythological Ananke, the personification of Necessity, and the mother of the Moirai (Fates) by Zeus. The adjectival"