Information: - Cornelis Johannes van Houten (February 18, 1920 24 August 2002) was a Dutch astronomer, sometimes referred to as Kees van Houten. - 1912 Anubis, also designated , is a stony Koronian asteroid from the outer region of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on September 24, 1960, by the Dutch and DutchAmerican astronomers Ingrid and Cornelis van Houten at Leiden, and Tom Gehrels, who took the photographic plates at Palomar Observatory, California. - A planet is an astronomical body orbiting a star or stellar remnant that The term "planet" is ancient, with ties to history, astrology, science, mythology, and religion. Several planets in the Solar System can be seen with the naked eye. These were regarded by many early cultures as divine, or as emissaries of deities. As scientific knowledge advanced, human perception of the planets changed, incorporating a number of disparate objects. In 2006, the International Astronomical Union (IAU) officially adopted a resolution defining planets within the Solar System. This definition is controversial because it excludes many objects of planetary mass based on where or what they orbit. Although eight of the planetary bodies discovered before 1950 remain "planets" under the modern definition, some celestial bodies, such as Ceres, Pallas, Juno and Vesta (each an object in the solar asteroid belt), and Pluto (the first trans-Neptunian object discovered), that were once considered planets by the scientific community, are no longer viewed as such. - Ingrid van Houten-Groeneveld (21 October 1921 30 March 2015) was a Dutch astronomer. - Anton M.J. "Tom" Gehrels (February 21, 1925 July 11, 2011) was a DutchAmerican astronomer, Professor of Planetary Sciences, and Astronomer at the University of Arizona, Tucson. - 1923 Osiris, also designated 4011 P-L, is a main-belt asteroid discovered on September 24, 1960, by Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld at Leiden, on photographic plates taken by Tom Gehrels at Palomar. Osiris is a C-type asteroid, about 13 kilometers in diameter. - 1924 Horus , also designated 4023 P -- L , is a main - belt asteroid discovered on September 24 , 1960 by Cornelis Johannes van Houten and Ingrid van Houten - Groeneveld at Leiden , on photographic plates taken by Tom Gehrels at Palomar . On the same date , the trio of astronomers also discovered 1912 Anubis , 1923 Osiris and 5011 Ptah . Horus measures about 12 kilometers in diameter . The designation P -- L stands for Palomar -- Leiden , named after Palomar Observatory and Leiden Observatory , which collaborated on the fruitful Palomar -- Leiden survey in the 1960s . Gehrels used Palomar 's Samuel Oschin telescope ( also known as the 48 - inch Schmidt Telescope ) , and shipped the photographic plates to Cornelis Johannes van Houten and Ingrid van Houten - Groeneveld at Leiden Observatory . The trio are credited with several thousand asteroid discoveries . It is named after Horus , the falcon - headed king of the sky and the stars , and son of the Egyptian god Osiris . - Asteroids are minor planets, especially those of the inner Solar System. The larger ones have also been called planetoids. These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disc of a planet and was not observed to have the characteristics of an active comet. As minor planets in the outer Solar System were discovered and found to have volatile-based surfaces that resemble those of comets, they were often distinguished from asteroids of the asteroid belt. In this article, the term "asteroid" refers to the minor planets of the inner Solar System including those co-orbital with Jupiter. - 5011 Ptah, provisional designation , is an eccentric, rare-type asteroid, classified as near-Earth asteroid and potentially hazardous object. It belongs to the group of Apollo asteroids and measures approximately 1.6 kilometers in diameter. It was discovered on 24 September 1960, by Dutch astronomers Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by DutchAmerican astronomer Tom Gehrels at the U.S Palomar Observatory in California. On the same night, the trio of astronomers also discovered the minor planets 1912 Anubis, 1923 Osiris and 1924 Horus, which were also named after Ancient Egyptian deities. What is the relationship between '1924 horus' and '24 september 1960'?
time of discovery