| NGC 103 open cluster | |
|---|---|
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| Observation data (J2000.0 epoch) | |
| Right ascension | 00h 25m 18s [1] |
| Declination | +61° 21.0′ [1] |
| Distance | 4600 |
| Apparent magnitude (V) | 9.8 |
| Apparent dimensions (V) | 5′ |
| Physical characteristics | |
| Other designations | Cr 1, OCL291 |
| Associations | |
| Constellation | Cassiopeia |
NGC 103 is a small open cluster. It is partially visible in an 8" amateur telescope under moderately light polluted skies. It is roughly 4600 light-years from the Sun.
NGC 4631 is a barred spiral galaxy in the constellation Canes Venatici about 30 million light years away from Earth. This galaxy's slightly distorted wedge shape gives it the appearance of a herring or a whale, hence its nickname. Because this nearby galaxy is seen edge-on from Earth, professional astronomers observe this galaxy to better understand the gas and stars located outside the plane of the galaxy.
Messier 38 or M38, also known as NGC 1912 or Starfish Cluster, is an open cluster of stars in the constellation of Auriga. It was discovered by Giovanni Batista Hodierna before 1654 and independently found by Le Gentil in 1749. The open clusters M36 and M37, also discovered by Hodierna, are often grouped together with M38. Distance is about 1.066 kpc (3,480 ly) away from Earth. The open cluster NGC 1907 lies nearby on the sky, but the two are most likely just experiencing a fly-by, having originated in different parts of the galaxy.
NGC 3109 is a small barred Magellanic type spiral or irregular galaxy around 4.35 Mly away in the direction of the constellation of Hydra. NGC 3109 is believed to be tidally interacting with the dwarf elliptical galaxy Antlia Dwarf. It was discovered by John Herschel on March 24, 1835 while he was in what is now South Africa.
NGC 7142 is an open cluster about 6,200 light-years away in the constellation Cepheus.
NGC 8 is an asterism of two completely unrelated stars in the constellation Pegasus, discovered on 29 September 1865 by Otto Wilhelm von Struve. It is approximately 2.7 arc minutes away from NGC 9.
NGC 4697 is an elliptical galaxy some 40 to 50 million light-years away in the constellation Virgo. It is a member of the NGC 4697 Group, a group of galaxies also containing NGC 4731 and several generally much smaller galaxies. This group is about 55 million light-years away; it is one of the many Virgo II Groups, which form a southern extension of the Virgo Supercluster of galaxies.
NGC 3783 is a barred spiral galaxy located about 135 million light years away in the constellation Centaurus. It is inclined by an angle of 23° to the line of sight from the Earth along a position angle of about 163°. The morphological classification of SBa indicates a bar structure across the center (B) and tightly-wound spiral arms (a). Although not shown by this classification, observers note the galaxy has a luminous inner ring surrounding the bar structure. The bright compact nucleus is active and categorized as a Seyfert 1 type. This nucleus is a strong source of X-ray emission and undergoes variations in emission across the electromagnetic spectrum.
NGC 51 is a lenticular galaxy in the constellation Andromeda. It has a diameter of 90,000 light-years. The galaxy was discovered on September 7, 1885, by Lewis Swift, who described it as "Pretty faint, pretty small, round, brighter middle."
NGC 72 is a barred spiral galaxy estimated to be about 320 million light-years away in the constellation of Andromeda. It was discovered by R. J. Mitchell in 1855 and its magnitude is 13.5.
NGC 114 is a barred lenticular galaxy located in the constellation Cetus. It was discovered by American astronomer Truman Henry Safford on September 23, 1867. The galaxy lies approximately 195 million light-years from Earth, and is about 55,000 light-years in diameter, nearly half the size of the Milky Way.
NGC 360 is a spiral galaxy located approximately 103 million light-years from the Solar System in the constellation Tucana. It was discovered on 2 November 1834 by John Herschel. Dreyer, creator of the New General Catalogue described the object as "extremely faint, very much extended 145°, very little brighter middle."
NGC 2992 is a Seyfert galaxy located 103 million light years distant in the equatorial constellation of Hydra. It was discovered in 1785 by Anglo-German astronomer William Herschel.
NGC 7047 is an intermediate spiral galaxy located about 270 million light-years away in the constellation of Aquarius. NGC 7047 is also classified as a LINER-type galaxy. NGC 7047 has an estimated diameter of 127,350 light years. It was discovered by French astronomer Édouard Stephan on August 20, 1873. In 2009 a supernova was found in NGC 7047.
NGC 490, also occasionally referred to as PGC 4973 or GC 277, is a lenticular galaxy in the constellation Pisces. It is located approximately 85 million light-years from Earth and was discovered on December 6, 1850, by Irish engineer Bindon Blood Stoney. Although John Dreyer, creator of the New General Catalogue, credits the discovery to astronomer William Parsons, he notes that many of his claimed discoveries were made by one of his assistants. In the case of NGC 490, the discovery was made by Bindon Stoney, who discovered it along with NGC 486, NGC 492 and NGC 500 during his observation of NGC 488.
NGC 3312 is a large and highly inclined spiral galaxy located about 194 million light-years away in the constellation Hydra. The galaxy was discovered by astronomer John Herschel on March 26, 1835. It was later rediscovered by astronomer Guillaume Bigourdan on February 26, 1887. NGC 3312 was later listed and equated with IC 629 because the two objects share essentially the same celestial coordinates. NGC 3312 is the largest spiral galaxy in the Hydra Cluster and is also classified as a LINER galaxy.
NGC 906 is a barred spiral galaxy in the constellation Andromeda in the northern sky. It is estimated to be 215 million light years from the Milky Way and has a diameter of approximately 110,000 ly. NGC 906 was discovered on October 30, 1878 by astronomer Édouard Stephan.
NGC 802 is a lenticular galaxy in the constellation Hydrus. It is about 68 million light-years from the Milky Way and has a diameter of about 20,000 light years. NGC 802 was discovered on November 2, 1834 by the British astronomer John Herschel.
NGC 937 is a barred spiral galaxy located in the constellation Andromeda about 251 million light years from the Milky Way. It was discovered by the French astronomer Édouard Stephan in 1884.
NGC 939 is a lenticular or elliptical galaxy in the constellation Eridanus. It is estimated to be 241 million light-years from the Milky Way and has a diameter of approximately 80,000 ly. NGC 939 was discovered on October 18, 1835 by astronomer John Herschel.
NGC 941 is an intermediate spiral galaxy in the constellation Cetus. It is an estimated 16.83 MPc from the Milky Way and has a diameter of approximately 55,000 light years. The galaxies NGC 926, NGC 934, NGC 936, NGC 955 are located in the same sky area. NGC 941 was discovered by the astronomer William Herschel on 6 January 1785.
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