A systematic name is a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific population or collection. Systematic names are usually part of a nomenclature.

A semisystematic name or semitrivial name is a name that has at least one systematic part and at least one trivial part.

Creating systematic names can be as simple as assigning a prefix or a number to each object (in which case they are a type of numbering scheme), or as complex as encoding the complete structure of the object in the name. Many systems combine some information about the named object with an extra sequence number to make it into a unique identifier.

Systematic names often co-exist with earlier common names assigned before the creation of any systematic naming system. For example, many common chemicals are still referred to by their common or trivial names, even by chemists.

In chemistry

In chemistry, a systematic name describes the chemical structure of a substance, thus giving some information about its chemical properties.

Pallas, minor-planet designation 2 Pallas, is the second asteroid to have been discovered (after Ceres), and it is one of the largest asteroids in the Solar System. With an estimated 7% of the mass of the asteroid belt, it is the third-most-massive asteroid, being 10–30% less massive than Vesta. It is 512 kilometers (318 mi) in diameter, somewhat smaller than Vesta. It is likely a remnant protoplanet.

When Pallas was discovered by the German astronomer Heinrich Wilhelm Matthäus Olbers on 28 March 1802, it was counted as a planet, as were other asteroids in the early 19th century. The discovery of many more asteroids after 1845 eventually led to their reclassification.

Pallas's surface appears to be a silicate material; the surface spectrum and estimated density resemble carbonaceous chondrite meteorites. Pallas's orbit, at 34.8°, is unusually highly inclined to the plane of the asteroid belt, and its orbital eccentricity is nearly as large as that of Pluto, making Pallas relatively inaccessible to spacecraft.

Pallas may refer to:

Greco-Roman mythology

In Greek mythology, Pallas (Πάλλας) was a son of Lycaon and the eponymous founder of the Arcadian town of Pallantion. He was the teacher of Athena, who, according to local myths, was born in Aliphera. He also had a daughter Chryse, who married Dardanus and brought the Palladium to Troy. Stone statues of Pallas and his grandsonEvander were extant in Pallantium in Pausanias' times.

Roman authors used Pallas' name to provide an etiology for the name of the hill Palatium.

References

Classical Mythology. 2007. 

Asteroids in astrology are used by some astrologers in a similar way to the planets. Asteroids are planetoids that orbit the Sun between Mars and Jupiter, and are not to be confused with centaurs or trans-Neptunian objects. The asteroids are relatively new to astrology, having only been discovered in the 19th century. However, some of them (especially the largest of them), are believed by some astrologers to influence human affairs. Still though, they are often ignored within mainstream systems of astrology, especially in more traditional astrology systems like Vedic astrology or Hellenistic astrology. Their use has become significant to a few Western astrologers yet still only a minority of astrologers use the asteroids in chart interpretation.

The former planets

Ceres, Pallas, Juno and Vesta (in order of discovery) were counted as planets from 1808 until 1845, when smaller asteroids began to be discovered. Astronomically the status of Ceres has changed again. In a proposed Resolution in 2006, it was suggested as one of the 12 planets in our Solar System, but in the end was re-classified as a dwarf planet by the International Astronomical Union. Many astrologers believe that astronomical labels don't hold much weight in their practice as through history man's definitions and labels have changed, but the astrological significations of what are considered "astrological planets" (including the Sun, Moon and, for modern astronomers, Pluto) have not changed.