Seyfert's Sextet is a group of galaxies about 190 million light-years away in the constellation Serpens. The group appears to contain six members, but one of the galaxies, NGC 6027d, is a background object and another "galaxy," NGC 6027e, is actually a part of the tail from galaxy NGC 6027. The gravitational interaction among these galaxies should continue for hundreds of millions of years. Ultimately, the galaxies will merge to form a single giant elliptical galaxy.
NGC 2541 is an unbarred spiral galaxy located about 40 million light-years away. It is in the NGC 2841 group of galaxies with NGC 2500, NGC 2537, and NGC 2552.
The Atlas of Peculiar Galaxies is a catalog of peculiar galaxies produced by Halton Arp in 1966. A total of 338 galaxies are presented in the atlas, which was originally published in 1966 by the California Institute of Technology. The primary goal of the catalog was to present photographs of examples of the different kinds of peculiar structures found among galaxies.
NGC 4976 is a peculiar elliptical galaxy in the constellation Centaurus. It was detected with a 5" telescope working at 20x magnification by comet hunter Jack Bennett.
NGC 5334 is a face-on barred spiral galaxy in the constellation Virgo. Its velocity with respect to the cosmic microwave background is 1668 ± 20 km/s, which corresponds to a Hubble distance of 80.2 ± 5.7 Mly (24.60 ± 1.75 Mpc). However, five non-redshift measurements give a distance of 108.68 ± 7.45 Mly (33.320 ± 2.283 Mpc). It was discovered by German-British astronomer William Herschel on 15 April 1787. It was also observed by American astronomer Lewis Swift on 20 April 1897 and listed in the Index Catalogue as IC 4338.
NGC 145, also known as Arp 19, is a barred spiral galaxy in Cetus, notable for its three spiral arms.
NGC 7317 is an elliptical galaxy that is a member of Stephan's Quintet in the constellation Pegasus. Its velocity with respect to the cosmic microwave background is 6272 ± 35 km/s, which corresponds to a Hubble distance of 301.7 ± 21.2 Mly (92.51 ± 6.51 Mpc). In addition, four non-redshift measurements gives a distance of 294.27 ± 34.22 Mly (90.225 ± 10.491 Mpc).It was discovered on 27 September 1873 by French astronomer Édouard Stephan.
NGC 7 is a barred spiral galaxy located in the Sculptor constellation. It was discovered by English astronomer John Herschel in 1834, who was using an 18.7 inch reflector telescope at the time. Astronomer Steve Gottlieb described the galaxy as faint, albeit large, and edge-on from the perspective of the Milky Way; he also noted how the galaxy could only be observed clearly with peripheral vision, not by looking directly at it.
NGC 14 is an irregular galaxy in the Pegasus constellation. It was included in Halton Arp's Atlas of Peculiar Galaxies, under the section "Galaxies with the appearance of fission," since the irregular appearance of this galaxy causes it to look like it is coming apart. It was discovered on September 18, 1786, by William Herschel.
NGC 19 is a spiral galaxy in the Andromeda constellation. It was discovered by Lewis Swift on 20 September 1885. It is often incorrectly listed as a duplicate of NGC 21.
NGC 22 is a spiral galaxy located in the Pegasus constellation. It was discovered in 1883 by Édouard Stephan.
NGC 36 is a barred spiral galaxy in the constellation Pisces. It is located about 221 million light-years away. It was discovered in October 25, 1785, by the astronomer William Herschel.
NGC 4489 is a dwarf elliptical galaxy located about 60 million light-years away in the constellation of Coma Berenices. It was discovered by astronomer William Herschel on March 21, 1784. NGC 4489 is a member of the Virgo Cluster.
NGC 4907 is a barred spiral galaxy located about 270 million light-years away in the constellation of Coma Berenices. It is also classified as a LINER galaxy. NGC 4907 was discovered by astronomer Heinrich d'Arrest on May 5, 1864. The galaxy is a member of the Coma Cluster, located equidistant between NGC 4928 and NGC 4829.
NGC 2090 is a spiral galaxy located in the constellation Columba. Its velocity with respect to the cosmic microwave background is 994 ± 5 km/s, which corresponds to a Hubble distance of 47.8 ± 3.4 Mly (14.65 ± 1.03 Mpc). However, 51 non-redshift measurements give a distance of 42.46 ± 0.64 Mly (13.018 ± 0.197 Mpc). It was discovered on 29 October 1826 by Scottish astronomer James Dunlop. NGC 2090 was studied to refine the Hubble constant to an accuracy within ±10%.
NGC 7199 is a barred spiral galaxy registered in the New General Catalogue. It is located in the direction of the Indus constellation. It was discovered by the English astronomer John Herschel in 1835 using a 47.5 cm reflector.
NGC 2300 is a lenticular galaxy in the constellation Cepheus. Its velocity with respect to the cosmic microwave background is 1876 ± 7 km/s, which corresponds to a Hubble distance of 90.2 ± 6.3 Mly (27.67 ± 1.94 Mpc). However, 11 non redshift measurements give a distance of 131.98 ± 21.75 Mly (40.464 ± 6.668 Mpc). The galaxy was discovered in 1871 by French astronomer Alphonse Borrelly using an 18 cm telescope.
NGC 4694 is a lenticular galaxy in the constellation Virgo. Its velocity with respect to the cosmic microwave background is 1481 ± 23 km/s, which corresponds to a Hubble distance of 71.3 ± 5.1 Mly (21.85 ± 1.57 Mpc). However, six non redshift measurements give a distance of 28.51 ± 7.23 Mly (8.742 ± 2.218 Mpc). The galaxy was discovered by William Herschel on March 15, 1784.
NGC 676 is a lenticular Seyfert 2 galaxy in the constellation Pisces. Its velocity with respect to the cosmic microwave background is 1217 ± 20 km/s, which corresponds to a Hubble distance of 58.6 ± 4.2 Mly (17.96 ± 1.29 Mpc). In addition, two non redshift measurements give a distance of 61.0 ± 2.6 Mly (18.7 ± 0.8 Mpc). The galaxy was discovered by German-British astronomer William Herschel on 30 September 1786.
