NGC 5949 | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Draco |
Right ascension | 15h 28m 0.70s [1] |
Declination | 64° 45′ 48.0″ [1] |
Redshift | 0.001414±0.000073 [1] |
Distance | 44 Mly (13.49 Mpc) [1] |
Apparent magnitude (V) | 12.1 [1] |
Characteristics | |
Type | SA(r)bc [1] |
Size | 30,000 ly (diameter) [1] |
Apparent size (V) | 1.9 x .89[ citation needed ] |
Notable features | Bright hot blue stars make up most of the galaxy |
Other designations | |
LEDA 55165, SDSS J152800.67+644547.4, Z 319-16, IRAS F15273+6456, 2MASX J15280067+6445473, TC 847, Z 1527.4+6455, IRAS 15273+6456, MCG+11-19-008, UGC 9866, K73 682, PSCz Q15273+6456, UZC J152800.7+644547 |
NGC 5949 is a dwarf spiral galaxy located around 44 million light-years away in the constellation Draco. [2] [3] NGC 5949 was discovered in 1801 by William Herschel, and it is 30,000 light-years across. NGC 5949 is not known to have an Active galactic nucleus, and it is not known for much star-formation. [3]
With a mass of about a hundredth that of the Milky Way, NGC 5949 is a relatively bulky example of a dwarf galaxy. [2] Its classification as a dwarf is due to its relatively small number of constituent stars, but the galaxy’s loosely-bound spiral arms also place it in the category of barred spirals. This structure is just visible in the Hubble Space Telescope (HST) image, [4] which shows the galaxy as a bright yet ill-defined pinwheel. Despite its small proportions, NGC 5949’s proximity has meant that its light can be picked up by fairly small telescopes, as discovered by William Herschel. [2] [5]
Astronomers have run into several cosmological quandaries when it comes to dwarf galaxies like NGC 5949. [4] For example, the distribution of dark matter [4] within dwarfs is quite puzzling (the “cuspy halo” problem), and our simulations of the Universe predict that there should be many more dwarf galaxies than we see around us (the “missing satellites” problem). [4] [5]
NGC 1097 is a barred spiral galaxy about 45 million light years away in the constellation Fornax. It was discovered by William Herschel on 9 October 1790. It is a severely interacting galaxy with obvious tidal debris and distortions caused by interaction with the companion galaxy NGC 1097A.
NGC 772 is an unbarred spiral galaxy approximately 130 million light-years away in the constellation Aries.
NGC 1232, also known as the Eye of God Galaxy is an intermediate spiral galaxy about 60 million light-years away in the constellation Eridanus. It was discovered by German-British astronomer William Herschel on 20 October 1784.
NGC 4565 is an edge-on spiral galaxy about 30 to 50 million light-years away in the constellation Coma Berenices. It lies close to the North Galactic Pole and has a visual magnitude of approximately 10. It is known as the Needle Galaxy for its narrow profile. First recorded in 1785 by William Herschel, it is a prominent example of an edge-on spiral galaxy.
NGC 5907 is a spiral galaxy located approximately 50 million light years from Earth. William Herschel discovered the galaxy in 1788.
NGC 3738 is a dwarf galaxy in the constellation of Ursa Major and belongs to the M81 Group of galaxies. NGC 3738 is 12 million light-years from the Sun. The galaxy was first discovered by astronomer William Herschel in 1789. NGC 3738 is a blue compact dwarf, which is small compared to large spiral galaxies. The galaxy is about 10,000 light-years across. It is one-tenth the size of the Milky Way
NGC 4206 is a spiral galaxy located about 70 million light-years away from Earth in the constellation of Virgo. The galaxy is visible with most moderate amateur telescopes at 13th magnitude. It was discovered by British astronomer William Herschel on 17 April 1784 and is a member of the Virgo Cluster.
NGC 428 is a barred spiral galaxy in the constellation of Cetus, with its spiral structure distorted and warped, possibly the result of the collision of two galaxies. There appears to be a substantial amount of star formation occurring within NGC 428 and it lacks well defined arms — a telltale sign of a galaxy merger. In 2015 the Hubble Space Telescope made a close-up shot of the galaxy with its Advanced Camera for Surveys and its Wide Field and Planetary Camera 2. The structure of NGC 428 has been compared to NGC 5645.
NGC 6221 is a barred spiral galaxy located in the constellation Ara. In de Vaucouleurs' galaxy morphological classification scheme, it is classified as SB(s)bc and was discovered by British astronomer John Herschel on 3 May 1835. NGC 6221 is located at about 69 million light years from Earth.
NGC 5264, also known as DDO 242, is an irregular galaxy in the constellation Hydra. It is part of the M83 subgroup of the Centaurus A/M83 Group, located some 15 million light years away. The galaxy was discovered on 30 March 1835 by John Herschel, and it was described as "very faint, pretty large, round, very little brighter middle" by John Louis Emil Dreyer, the compiler of the New General Catalogue.
NGC 7013 is a relatively nearby spiral or lenticular galaxy estimated to be around 37 to 41.4 million light-years away from Earth in the constellation of Cygnus. NGC 7013 was discovered by English astronomer William Herschel on July 17, 1784 and was also observed by his son, astronomer John Herschel on September 15, 1828.
NGC 4242 is a spiral galaxy in the northern constellation of Canes Venatici. The galaxy is about 18 million light years away. It was discovered on 10 April 1788 by William Herschel, and it was described as "very faint, considerably large, irregular, round, very gradually brighter in the middle, resolvable" by John Louis Emil Dreyer, the compiler of the New General Catalogue.
NGC 681 is an intermediate spiral galaxy in the constellation of Cetus, located approximately 66.5 million light-years from Earth. The name Little Sombrero Galaxy is a reference to a much larger and earlier observed sombrero-like galaxy designated M104, or the Sombrero Galaxy.
NGC 779 is a spiral galaxy seen edge-on, located in the constellation Cetus. It is located at a distance of circa 60 million light years from Earth, which, given its apparent dimensions, means that NGC 779 is about 70,000 light years across. It was discovered by William Herschel on September 10, 1785.
NGC 6902 is an unbarred spiral galaxy located in the southern constellation of Sagittarius at an approximate distance of 124 million light-years (38.0 Mpc). NGC 6902 was discovered on September 2, 1836 by English astronomer John Herschel. In his New General Catalogue, Danish astronomer J. L. E. Dreyer described it as faint, considerably small, round, brighter middle. It is a member of the small NGC 6092 group of galaxies; the LGG 434 group
NGC 1376 is a spiral galaxy located around 180 million light-years away in the constellation Eridanus. It was discovered in 1785 by William Herschel, and it is 79,000 light-years across. NGC 1376 is not known to have an active galactic nuclei, but it does have lots of star-forming regions.
NGC 6622 is an interacting spiral galaxy in the constellation Draco. It is located around 313 million light-years away, and it was discovered by Edward D. Swift and Lewis A. Swift on June 2, 1885. NGC 6622 interacts with NGC 6621, with their closest approach having taken place about 100 million years before the moment seen now. NGC 6622 and NGC 6621 are included in the Atlas of Peculiar Galaxies as Arp 81 in the category "spiral galaxies with large high surface brightness companions".
NGC 2012 is a large spiral galaxy in the Constellation Mensa. It was discovered by John Herschel in 1836. With its distance from the Earth being over 236 million light years, NGC 2012 is not visible to the naked eye, and a large telescope is needed. A probe has never been sent out to study the galaxy.
NGC 7329 is a large barred spiral galaxy located in the constellation Tucana. NGC 7329 was discovered by British astronomer John Herschel in 1835.
NGC 4825 is a lenticular galaxy located around 230 million light-years away in the constellation Virgo. NGC 4825 was discovered on March 27th, 1786 by the astronomer William Herschel, and its diameter is 133,000 light-years across. NGC 4825 is not know to have much star-formation, and it does not have an active galactic nucleus.