What size aperture did the telescope which was used to discover NGC 331 have?
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NGC 331 NGC 331 is a spiral galaxy in the constellation Cetus. It was discovered in 1886 by Francis Leavenworth. It was described by Dreyer as "extremely faint, very small, round, a little brighter middle, 12th magnitude star 3 arcmin northeast." There are two candidates as to which object is NGC 331: PGC 2759 or PGC 3406, with the former being a much more likely candidate than the latter.
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Francis Preserved Leavenworth Francis Preserved Leavenworth (born September 3, 1858 in Mount Vernon, Indiana; died November 12, 1928; a.k.a. "Frank Leavenworth") was an American astronomer. He discovered many New General Catalogue objects together with Frank Muller and Ormond Stone. They used a telescope with a 66-cm aperture at the Leander McCormick Observatory at the University of Virginia in Charlottesville, Virginia.
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NGC 5001 NGC 5001 is a barred spiral galaxy located in the constellation Ursa major. It is designated as SB in the galaxy morphological classification scheme. It was discovered by John Herschel on 1 May 1831. It is at a distance of 130 million parsecs from the earth.<ref name="NASA/IPAC"> </ref>
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Messier 94 Messier 94 (also known as NGC 4736) is a spiral galaxy in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1781,
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NGC 299 NGC 299 is an open cluster in the Small Magellanic Cloud. It is located in the constellation Tucana. It was discovered on August 12, 1834 by John Herschel.
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NGC 392 NGC 392 is a lenticular galaxy located in the constellation Pisces. It was discovered on September 12, 1784 by William Herschel. It was described by Dreyer as "faint, very small, round, much brighter middle, between 2 stars."
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NGC 390 NGC 390 is a star located in the constellation Pisces. It was discovered on November 19, 1884 by Guillaume Bigourdan. It was described by Dreyer as very faint, very small, stellar." However, this position precesses to a position where there is nothing apart from a few scattered stars. However, Bigourdan's original measurements point exactly to a star, which is the most likely candidate for NGC 390; however, as a result of this confusion, a galaxy nearby (PGC 4021) has sometimes been mistaken as NGC 390.
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NGC 3281 NGC 3281 is a large spiral galaxy without a bar in the constellation Antlia. It is a member of the Antlia Cluster, which lies about 98 million light years away.
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NGC 4707 NGC 4707 is an irregular galaxy in the constellation of Canes Venatici. It was discovered by John Herschel on 5 June 1834, and was described by John Louis Emil Dreyer, the compiler of the New General Catalogue, as a "small, stellar" galaxy.
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NGC 332 NGC 332 is a compact and/or lenticular galaxy in the constellation Pisces. It was discovered on October 22, 1886 by Lewis Swift. It was described by Dreyer as "very faint, small, round, several stars near to south."
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NGC 1313 NGC 1313 (also known as the Topsy Turvy Galaxy) is a field galaxy and a barred spiral galaxy discovered by the Scottish astronomer James Dunlop on 27 September 1826. It has a diameter of about 50,000 light-years, or one-third the size of the Milky Way.
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NGC 418 NGC 418 is a barred spiral galaxy of type SB(s)c located in the constellation Sculptor. It was discovered on September 28, 1834 by John Herschel. It was described by Dreyer as "faint, pretty large, round, very gradually a little brighter middle, western of 2.", the other being NGC 423.
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NGC 129 NGC 129 is an open cluster in the constellation Cassiopeia. It was discovered by William Herschel in 1788. It is located almost exactly halfway between the bright stars Caph (β Cassiopeiae) and γ Cassiopeiae. It is large but not dense and can be observed by binoculars, where the most obvious is a small triangle of stars of magnitude 8 and 9, located in the center of the cluster.
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Overwhelmingly Large Telescope The Overwhelmingly Large Telescope (OWL) was a conceptual design by the European Southern Observatory (ESO) organization for an extremely large telescope, which was intended to have a single aperture of 100 meters in diameter. Because of the complexity and cost of building a telescope of this unprecedented size, ESO has elected to focus on the 39-meter diameter European Extremely Large Telescope instead.
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NGC 387 NGC 387 is an elliptical galaxy located in the constellation Pisces. It was discovered on December 10, 1873 by Lawrence Parsons. It was described by Dreyer as "very faint, small, round." Along with galaxies NGC 375, NGC 379, NGC 382, NGC 383, NGC 384, NGC 385, NGC 386 and NGC 388, NGC 387 forms a galaxy cluster called Arp 331.
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NGC 3621 NGC 3621 is a field spiral galaxy about 22 Mly away in the constellation of Hydra (The Sea Snake). It is comparatively bright and can be well seen in moderate-sized telescopes. The galaxy is around 93000 ly across and is inclined at an angle of 25° from being viewed edge on. It shines with a luminosity equal to 13 billion times that of the Sun. The morphological classification is SA(s)d, which indicates this is an ordinary spiral with loosely wound arms. There is no evidence for a bulge. Although it appears to be isolated, NGC 3621 belongs to the Leo spur.
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NGC 5177 NGC 5177 is a galaxy. Based on a redshift of 6467 km/s the galaxy is crudely estimated to be about 300 million light-years away.
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NGC 128 NGC 128 is a lenticular galaxy in the constellation Pisces. It is approximately 190 million light-years from earth and has a diameter of about 165,000 light years.
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NGC 6822 NGC 6822 (also known as Barnard's Galaxy, IC 4895, or Caldwell 57) is a barred irregular galaxy approximately 1.6 million light-years away in the constellation Sagittarius. Part of the Local Group of galaxies, it was discovered by E. E. Barnard in 1884 (hence its name), with a six-inch refractor telescope. It is one of the closer galaxies to the Milky Way. It is similar in structure and composition to the Small Magellanic Cloud. It is about 7,000 light-years in diameter.
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NGC 342 NGC 342 is a lenticular galaxy in the constellation Cetus. It was discovered on September 27, 1864 by Albert Marth. It was described by Dreyer as "very faint, very small."
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Swedish Solar Telescope The Swedish 1-m Solar Telescope (or SST) is a refracting solar telescope at Roque de los Muchachos Observatory, La Palma in the Canary Islands. It is run by the Institute for Solar Physics of Stockholm University. The primary element is a single fused silica lens, making it the second largest optical refracting telescope in use in the world. The 110-cm lens has a clear aperture diameter of 98 cm. The SST is most often used as a Schupmann telescope, thereby correcting the chromatic aberrations of the singlet primary.
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NGC 1852 NGC 1852 is an open cluster in the Large Magellanic Cloud in the constellation Dorado. It was discovered in 1826 by James Dunlop with a 9-inch reflecting telescope.