NGC 750/751
| Galaxy Arp 166 |
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|---|---|
 |
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| SDSS image from Arp 166 | |
| AladinLite | |
| Constellation | triangle |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 01 h 57 m 33 s |
| declination | + 33 ° 12 ′ 22 ″ |
| Appearance | |
| Morphological type | NGC 750: E pec NGC 751: E pec |
| Brightness (visual) | NGC 750: 12.0 mag NGC 751: 12.2 mag |
| Brightness (B-band) | NGC 750: 13.0 mag NGC 751: 13.2 mag |
| Angular expansion | NGC 750: 1.6 × 1.3 NGC 751: 1.2 × 1.2 |
| Position angle | NGC 750: 163 ° |
| Surface brightness | NGC 750: 12.9 mag / arcmin² NGC 751: 12.7 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 042 |
| Redshift | 0.017249 ± 0.000027 0.017185 ± 0.000027 |
| Radial velocity | (5171 ± 8) (5152 ± 8) km / s |
|
Stroke distance v rad / H 0 |
(237 ± 17) · 10 6 ly (72.6 ± 5.1) Mpc |
| history | |
| discovery | William Herschel (NGC 750) Bindon B. Stoney (NGC 751) |
| Discovery date | September 12, 1784 October 11, 1850 |
| Catalog names | |
| NGC 750/751 • UGC 1430/1 • PGC 7369/70 • CGCG 503-062 • MCG + 05-05-034 / 35 • Arp 166 • VV 189 • | |
NGC 750/751 = Arp 166 is an interacting galaxy pair in the constellation Triangulum . The galaxy pair is about 237 million light years from the Milky Way. Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class of diffuse filament galaxies .
The object was discovered by William Herschel on September 12, 1784 .
Web links
literature
- Jeff Kanipe, Dennis Webb: The Arp Atlas of Peculiar Galaxies - A Chronicle and Observer's Guide. Richmond 2006, ISBN 0-943396-76-X .
- R. Madejsky: Morphology and kinematics of the interacting elliptical galaxies NGC 750 and NGC 751 = Arp 166 - Velocity fields of tidally distorted elliptical galaxies. In: Astronomy and Astrophysics. Volume 247, No. 2, 1991, pp. 348-356.
- A. del Olmo, J. Perea, M. Moles: The dumb-bell galaxy NGC 750/751. In: Astrophysics and Space Science. Volume 170, 1990, pp. 311-314.