| PGC 2046648 | |
|---|---|
 | |
| Observation data | |
| Constellation | Hercules |
| Redshift | 0.08562 |
| Heliocentric radial velocity | 25,651 km/s |
| Distance | 1.2 Gly |
| Characteristics | |
| Type | Sc(f) |
| Size | 260,000 ly |
| Other designations | |
| LEDA 2046648, 2MASX J16583507+3416309, SDSS J165835.03+341630.7 | |
PGC 2046648 is a large spiral galaxy located 1.2 billion light-years away in the Hercules constellation. [1] [2] [3] Its diameter is estimated 260,000 thousand light-years, meaning PGC 2046648 is much larger compared to the Milky Way. [1]
PGC 54493 is a barred spiral galaxy located about 490 million light-years away in the constellation Serpens. It is part of a galaxy group called Abell 2052. It has an estimated diameter of 140,000 light-years.
PGC 44691 is a spiral galaxy located about 350 million light-years away in the constellation Coma Berenices. It belongs to a galaxy cluster known as the Coma Cluster. In 1994, the Hubble Space Telescope observed PGC 44691 and the nearby elliptical galaxy NGC 4881 to infer the distance to the Coma Cluster.
NGC 493, also occasionally referred to as PGC 4979 or GC 281, is a barred spiral galaxy in the constellation Cetus. It is located approximately 90 million light-years from Earth and was discovered on December 20, 1786 by astronomer William Herschel. It was later also observed by his son, John Herschel. John Dreyer, creator of the New General Catalogue, described the galaxy as "very faint, large, much extended 60°" with "a little brighter middle".
NGC 494, also occasionally referred to as PGC 5035 or GC 282, is a barred spiral galaxy in the constellation Pisces. It is located approximately 227 million light-years from Earth and was discovered on 22 November 1827 by astronomer John Herschel. John Dreyer, creator of the New General Catalogue, described the galaxy as "very faint, pretty large, extended, 3 faint stars to south".
NGC 6040 is a spiral galaxy located about 550 million light-years away in the constellation Hercules. NGC 6040 was discovered by astronomer Édouard Stephan on June 27, 1870. NGC 6040 is interacting with the lenticular galaxy PGC 56942. As a result of this interaction, NGC 6040's southern spiral arm has been warped in the direction toward PGC 56942. NGC 6040 and PGC 56942 are both members of the Hercules Cluster.
NGC 521, also occasionally referred to as PGC 5190 or UGC 962, is a barred spiral galaxy located approximately 224 million light-years from the Solar System in the constellation Cetus. It was discovered on 8 October 1785 by astronomer William Herschel.
NGC 3908 is one of the furthest NGC objects. It is an elliptical galaxy located 1.2 billion light-years away in the Leo constellation with an estimated 280,000 thousand light-years across in diameter. It was discovered on April 10, 1885, by Lewis Swift, who found the object too faint for the naked eye to see. The identification of the celestial object observed by Swift is uncertain. The coordinates place it approximately 7.5 arcminutes south-southwest of a galaxy previously listed, potentially identifying it as PGC 36967. However, astronomers Corwin and Gottlieb argue that the object is much fainter than Swift's descriptions suggest, indicating it may have been too faint for him to observe. Although the right ascension aligns with another of Swift's discoveries on the same night, the discrepancy in declination is notably larger. It remains unclear if PGC 36967 is NGC 3908, and it is equally probable that Swift's observed object is "lost," with any nearby galaxy merely coincidental to Swift's original position. Due to its relatively large size, NGC 3908 is considered a brightest cluster galaxy, a BCG.
NGC 2603 is a small compact spiral galaxy located 787 million light-years away in the constellation of Ursa Major from the solar system. It was discovered by George Johnstone Stoney, an Irish astronomer, on February 9th, 1850. NGC 2603 has an estimated diameter of 81,000 thousand light-years. It contains a narrow-line active galactic nucleus. The Hyperleda database associates NGC 2603 and NGC 2606 as one single galaxy. NASA/IPAC database on the other hand, classifies NGC 2603 as galaxy PGC 3133653.
IC 21 known as PGC 1785, is a distant barred spiral galaxy located in the Cetus constellation. It is located 822 million light-years away and has an estimated diameter of 120,000 thousand light-years. IC 21 was first found by Stephane Javelle, who was a French astronomer on November 7th in 1891. The galaxy is apparently located near towards a dwarf galaxy, PGC 3112047. According to SIMBAD database, IC 21 is both a Seyfert type 2 and radio galaxy, suggesting an active galactic nucleus.
PGC 29820 is a spiral galaxy located 600 million light-years away from the solar system in the Sextans constellation. It is about 120,000 thousand light-years in diameter and has high amounts of star formation rates. The reason is due to the ram pressure, which enables the dense gas to be compressed which eventually collapses to form new stars. Not only to mention, the galaxy's tendrils are also created, hence astronomers calling it a jellyfish galaxy. According to SIMBAD, it is classified as a Seyfert 2 galaxy which it contains an active nucleus.
PGC 65543, is a spiral galaxy, with extensive star forming regions, located in Indus. It is 650 million light-years away from the solar system and approximately measuring 90,000 light-years in diameter. The tidal interactions from certain galaxies which PGC 65543 is moving towards to, have caused it to get distorted. Its star-forming gas and dust are dynamically stripped and formed into tendrils that stretch outwards, thus gives an appearance of a jellyfish galaxy.
PGC 1228197 known as WINGS J211347.41+022834.9 and JO206, is a large spiral galaxy located 700 million light-years away towards the constellation of Aquarius. The galaxy is estimated to be at least 160,000 thousand light-years in diameter, making it somehow bigger than the Milky Way. With a radial velocity of 15,200 kilometers per second, it is slowly drifting away. It is classified as a jellyfish galaxy, mainly due to interactions from other galaxies, causing it to run into intracluster medium and stripping the gas from it, which causes long galactic tendrils of stars. It has an active galactic nucleus according to SIMBAD.
PGC 4789 is a distant barred spiral galaxy in the Pisces constellation. It is located 675 million light-years from the Milky Way and seems to be interacting with its neighboring galaxies. it is known as Arp 48 in the Atlas of Peculiar Galaxies catalogue. In this class, PGC 4789 falls into galaxies that have at least one low surface brightness companion.
IC 42 known as PGC 2463 and PGC 911417, is a barred spiral galaxy located in the constellation of Cetus. It is about 750 million light-years away from the solar system and has an estimated diameter of 145,000 thousand light-years, making it bigger compared to the Milky Way galaxy. It was first found by Stephane Javelle, a French astronomer on August 25, 1892. According to SIMBAD, it is considered as an emission-line galaxy.
UGC 934, known as PGC 5085, is a large spiral galaxy about 470 million light-years away from the solar system. It is located in the constellation of Pisces and about 285,000 thousand light-years in diameter. With its neighboring galaxy PGC 212740, they together form Arp 70, the 70th number in the Atlas of Peculiar Galaxies which was created by Halton Arp. In this class, they fall under spiral galaxies that have a small high-surface brightness companions.
IC 4461 is a spiral galaxy located in the Boötes constellation, located at distance of 417 million light-years from both the Milky Way and Andromeda Galaxy.
UGC 4457 known as PGC 23935, is a barred spiral galaxy, containing an active galactic nucleus in the Cancer constellation. It is located 500 million light-years away from the solar system and has a diameter of 290,000 light-years, making it slightly more massive compared to the Milky Way. The galaxy is moving away at a speed of 11,162 kilometers per second.
UGC 11105 known as PGC 61361, is a relatively nearby spiral galaxy located 109 million light-years away in the Hercules constellation. It is less luminous in appearance. The supernova that occurred in UGC 11105 in 2019, has long faded. It is outshone by the bright stars shown in the foreground. From the perspective on Earth, the Sun is 14 thousand trillion times brighter as compared to UGC 1105, if we to calculate the apparent magnitude for both objects. It is a possible active galactic nucleus candidate, according to SIMBAD.
IC 5337 or JW100, is a spiral galaxy located 800 million light-years away from the solar system in the constellation of Pegasus. It is probably gravitationally bound to IC 5338, the brightest cluster galaxy in Abell 2626. IC 5337 is a jellyfish galaxy, mainly due to dynamic stripping pressure. Star-forming gas are thrown about, as the galaxy penetrates through the thin gas layer and causing them to drip from the galaxy's disc, giving it its unique appearance of a cosmic jellyfish. In the image, other galaxies can be seen in the background.
UGC 1840 known as Arp 145, are a pair of interacting galaxies located 250 million light-years away from the solar system in the Andromeda constellation. Made up of two galaxies, UGC 1840 NED01 and UGC 1840 NED02, the two galaxies had recently collided with each other in which the elliptical galaxy has penetrated through the spiral galaxy's nucleus leaving a hole in its middle, thus forming a ring galaxy. With a diameter of 1.3 arc minutes, close to 100,000 thousand light-years, they are roughly the same size as the Milky Way.
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