NGC 1169 | |
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Observation data (J2000 epoch) | |
Constellation | Perseus [1] |
Right ascension | 03h 03m 34.756s [2] |
Declination | +46° 23′ 10.74″ [2] |
Redshift | 0.007962 ± 0.000017 [3] |
Helio radial velocity | 2387 ± 5 km/s [3] |
Galactocentric velocity | 2508 ± 5 km/s [3] |
Distance | 35.1 ± 8.4 kpc (114 ± 27 kly)h−1 0.73 [3] |
Apparent magnitude (V) | 9.02 [3] |
Apparent magnitude (B) | 13.2 [2] |
Absolute magnitude (V) | -23.6 [3] |
Characteristics | |
Type | SAB(r)b [3] |
Mass | 4.5×1011 [4] M☉ |
Mass/Light ratio | 10 [4] M☉/L☉ |
Size | 120,000 × 84,000 ly [3] |
Apparent size (V) | 4.2 × 2.8 arcmin [3] |
Other designations | |
NGC 1169, UGC 2503, PGC 11521 |
NGC 1169 (UGC 2503) is an intermediate barred spiral galaxy in the constellation of Perseus. NGC 1169 has a reddish center, indicating the region is dominated by older stars. In contrast, the outer ring contains larger blue-white stars, a sign of recent star formation. [1] [5] The entire galaxy is rotating at approximately 265 km/s. [4]
NGC 1169 was discovered on December 11, 1786 by William Herschel. [6] Measurements of its distance range from 20.9 Mpc - 49.7 Mpc with an average of 35.1 Mpc. [3]
NGC 3184, the Little Pinwheel Galaxy, is a spiral galaxy approximately 40 million light-years away in the constellation Ursa Major. It has two HII regions named NGC 3180 and NGC 3181.
NGC 1637 is an isolated, non-interacting intermediate spiral galaxy in the constellation Eridanus, about a degree to the WNW of the star Mu Eridani. It is located at a distance of about 9.77 ± 1.82 Mpc (31.9 ± 5.9 Mly) from the Milky Way. The galaxy is inclined at an angle of 31.1° to the line of sight from the Earth and the long axis is oriented along a position angle of 16.3°.
NGC 4013 is an edge-on barred spiral galaxy about 55 million light-years away in the constellation Ursa Major. The disk of NGC 4013 shows a distinct "peanut"-shaped bulge in long exposure photographs that N-body computer simulations suggest is consistent with a stellar bar seen perpendicular to the line of sight.
NGC 935 and IC 1801 are a pair of interacting galaxies within the Aries constellation. NGC 935 is the northern member of the pair and IC 1801 is the southern.
NGC 7049 is a lenticular galaxy that spans about 150,000 light-years and lies about 100 million light-years away from Earth in the inconspicuous southern constellation of Indus.
NGC 7332 is an edge-on peculiar lenticular galaxy located about 67 million light-years away in the constellation Pegasus. It possesses a -shaped bulge, associated with stellar bar. It was discovered on September 19, 1784 by the astronomer William Herschel.
Arp 271 is a pair of similarly sized interacting spiral galaxies, NGC 5426 and NGC 5427, in the constellation of Virgo. It is not certain whether the galaxies are going to eventually collide or not. They will continue interacting for tens of millions of years, creating new stars as a result of the mutual gravitational attraction between the galaxies, a pull seen in the bridge of stars already connecting the two. Located about 130 million light-years away, the Arp 271 pair is about 130,000 light-years across. It was originally discovered in 1785 by William Herschel. It is speculated, that the Milky Way will undergo a similar collision in about five billion years with the neighbouring Andromeda Galaxy, which is currently located about 2.6 million light-years away.
NGC 1560, also known as IC 2062, is an 11th-magnitude spiral galaxy, in the IC 342/Maffei Group. It was discovered by Wilhelm Tempel on August 1, 1883.
Arp 7 is a spiral galaxy in the constellation Hydra. Redshift-independent measurements of its distance vary widely, from 5.9 Mpc to 83.7 Mpc. Its morphological classification is SB(rs)bc, meaning it is a barred spiral galaxy with some ring-like structure.
NGC 4598 is a barred lenticular galaxy located in the constellation Virgo. NGC 4598 was discovered by astronomer William Herschel on April 15, 1784. The distance to NGC 4598 has not been accurately determined; measurements vary from 64 to 102 million light-years. According to the NASA/IPAC Extragalactic Database, its redshift based distance is 102 Mly (31.3 Mpc) while its redshift independent based distance is 88.71 Mly (27.200 Mpc). Also, according to SIMBAD, its distance is 63.7 Mly (19.54 Mpc). NGC 4598's average distance is 84.8 Mly (26.0 Mpc). NGC 4598 is usually considered to be a member of the Virgo Cluster. However, P. Fouqu´e et al. suggests it may be a background galaxy independent of the main cluster.
NGC 3981 is an unbarred spiral galaxy located 62 million light-years away in the constellation of Crater. It was discovered on February 7, 1785 by William Herschel.
NGC 688 is a barred spiral galaxy with starburst activity located 190 million light-years away in the constellation Triangulum. It was discovered by astronomer Heinrich d'Arrest on September 16, 1865 and is a member of the galaxy cluster Abell 262.
NGC 4221 is a barred lenticular galaxy located about 75.9 million light-years away in the constellation of Draco. It was discovered on April 3, 1832 by the astronomer John Herschel. NGC 4221 is notable for having an outer ring that surrounds the inner barred central region of the galaxy.
The Telescopium−Grus Cloud is a galaxy filament in the constellations of Pavo, Indus, and Telescopium. It was first defined by astronomer Brent Tully in his book The Nearby Galaxies Atlas and its companion book The Nearby Galaxies Catalog.