Nebula | |
---|---|
Observation data: J2000 epoch | |
Right ascension | 14h 04m 28s |
Declination | +54° 23’ 48” |
Apparent magnitude (V) | 14.54 |
NGC 5471 is an emission nebula (HII region) located in Messier 101 (the Pinwheel Galaxy) [1] towards the constellation Ursa Major. Eight other regions of Messier 101 are listed in the New General Catalogue, namely NGC 5447, NGC 5449, NGC 5450, NGC 5451, NGC 5453, NGC 5458, NGC 5461 and NGC 5462. [2] Three of these regions were discovered by William Herschel (NGC 5447, NGC 5461 and NGC 5462) and the other six by Bindon Stoney. [2]
NGC 5471 is however, unlike the nine other regions discovered by Herschel and Stoney, located on the outskirts of M101 and it was later discovered by d'Arrest in 1863. Furthermore, there is no agreement on its nature. For the Simbad database, it is a galaxy and for Professor Seligman, it is a cloud of stars. [1] The HyperLeda database indicates the PG rating for NGC 5471, [3] therefore part of the galaxy. As for the NASA/IPAC database, it is mentioned that it is an HII region, but further on it is indicated under the morphology section that it is a Wolf-Rayet galaxy. [2]
The Pinwheel Galaxy is a face-on, unbarred, and counterclockwise spiral galaxy located 21 million light-years from Earth in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781 and was communicated that year to Charles Messier, who verified its position for inclusion in the Messier Catalogue as one of its final entries.
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 5970 is a large barred-spiral galaxy located about 90 million light years away in the constellation Serpens Caput. It appears to have two satellite or companion galaxies. It is a member of the Virgo Cluster of galaxies. It was discovered on March 15, 1784, by the astronomer William Herschel.
NGC 468 is a spiral galaxy in the constellation Pisces. Located approximately 209 million light-years from Earth, it was discovered by John Frederick William Herschel in 1827.
NGC 3794, also cataloged in the New General Catalogue as NGC 3804, is a low-surface-brightness galaxy in the constellation Ursa Major. It is very far from Earth, with a distance of about 68,470,000 light-years (20,990,000 pc). It was discovered on April 14, 1789, by the astronomer William Herschel.
NGC 3867 is a spiral galaxy located about 350 million light-years away in the constellation Leo. It was discovered by astronomer Édouard Stephan on March 23, 1884 and is a member of the Leo Cluster.
NGC 4296 is a barred lenticular galaxy located about 200 million light-years away in the constellation Virgo. It was discovered by astronomer William Herschel on April 13, 1784. It forms a pair with NGC 4297, and both galaxies are listed as CGCG 042-041, and KPG 331.
NGC 803 is a spiral galaxy located in the constellation Aries about 70 million light-years from the Milky Way. It was discovered by the German–British astronomer William Herschel in 1784.
NGC 3006 is an edge-on spiral galaxy in the constellation Ursa Major. It has an apparent magnitude of 15. It was discovered by the astronomer Bindon Stoney on January 25, 1851.
NGC 731 is an elliptical galaxy located in the constellation of Cetus about 172 million light-years away from the Milky Way. It was discovered by William Herschel on January 10, 1785. It has a luminosity of 3.9×1010 L☉.
NGC 5473 is a lenticular galaxy in the constellation Ursa Major. It was discovered on April 14, 1789, by the astronomer William Herschel. Located roughly 85 million light-years away, it is part of a small galaxy group including NGC 5475 and NGC 5485.
NGC 4343 is an unbarred spiral galaxy in the constellation Virgo. It was discovered by the astronomer William Herschel on April 13, 1784. At a distance of 80 million light-years, it is located in the Virgo Cluster. It contains an active galactic nucleus.
NGC 4326 is a barred spiral galaxy with a ring located about 330 million light-years away in the constellation Virgo. It was discovered by astronomer William Herschel on April 13, 1784, who described it as "vF, S, R, bM, 1st of 3". It is a large galaxy, with a diameter of around 200,000 ly (61 kpc) making it nearly twice the size of the Milky Way. NGC 4326 is also classified as a LINER galaxy. Despite being listed in the Virgo Cluster catalog as VCC 623, it is not a member of the Virgo Cluster but instead a background galaxy.
NGC 4333 is a barred spiral galaxy with a ring structure located about 330 million light-years away in the constellation Virgo. It was discovered by astronomer William Herschel on April 13, 1784, who described it as "F, pS, R, bM, 2nd of 3". NGC 4333 is also classified as a LINER galaxy. Despite being listed in the Virgo Cluster catalog as VCC 637, it is not a member of the Virgo Cluster but instead a background galaxy.
NGC 2606 is a spiral galaxy in the Ursa Major constellation. It lies 648 million light-years away from our home galaxy, the Milky Way. The galaxy was first discovered by John Herschel, a British astronomer on 16th February 1831. According to SIMBAD database, it is classified as a LINER galaxy and a Seyfert type 2 galaxy by Hyperleda.
NGC 5279 is a spiral galaxy in the constellation Ursa Major. It was discovered by German-British astronomer William Herschel in 1789. NGC 5279 is in gravitational interaction with the galaxy NGC 5278. This pair of galaxies appears in Halton Arp's Atlas of Peculiar Galaxies under the designation Arp 239. The luminosity class of NGC 5279 is I1. NGC 5279 is a galaxy whose core shines in the ultraviolet region. It is listed in the Markarian catalog under the designation Mrk 271.
NGC 5885 is an intermediate barred spiral galaxy located in the constellation Libra. Its speed relative to the cosmic microwave background is 2,185 ± 13 km/s, which corresponds to a Hubble distance of 32.3 ± 2.3 Mpc. NGC 5885 was discovered by German-British astronomer William Herschel in 1784.
NGC 4017 is an intermediate spiral radio galaxy located in the constellation Coma Berenices. Its speed relative to the cosmic microwave background is 3,748 ± 21 km/s, which corresponds to a Hubble distance of 55.3 ± 3.9 Mpc. NGC 4017 was discovered by German-British astronomer William Herschel in 1785.
NGC 5455 is an emission nebula located in Messier 101 towards the constellation Ursa Major. Eight other regions of Messier 101 are listed in the New General Catalogue, namely NGC 5447, NGC 5449, NGC 5450, NGC 5451, NGC 5453, NGC 5458, NGC 5461 and NGC 5462. Three of these regions were discovered by William Herschel and the other six by Bindon Stoney.
NGC 5461 is an emission nebula located in Messier 101 towards the constellation Ursa Major. Eight other regions of Messier 101 are listed in the New General Catalogue, namely NGC 5447, NGC 5449, NGC 5450, NGC 5451, NGC 5453, NGC 5458, NGC 5461 and NGC 5462. Three of these regions were discovered by William Herschel and the other six by Bindon Stoney.