NGC 1638
| Galaxy NGC 1638 |
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|---|---|
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Eridanus |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 04 h 41 m 36.5 s |
| declination | -01 ° 48 ′ 33 ″ |
| Appearance | |
| Morphological type | SAB (rs) 0 ^ 0 ^? |
| Brightness (visual) | 12.0 mag |
| Brightness (B-band) | 13.0 likes |
| Angular expansion | 1.8 ′ × 1.2 ′ |
| Position angle | 70 ° |
| Surface brightness | 12.7 mag / arcmin² |
| Physical data | |
| Redshift | 0.011062 ± 0.000035 |
| Radial velocity | (3316 ± 10) km / s |
|
Stroke distance v rad / H 0 |
(145 ± 10) · 10 6 ly (44.4 ± 3.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | February 1, 1786 |
| Catalog names | |
| NGC 1638 • UGC 3133 • PGC 15824 • CGCG 393-068 • MCG + 00-12-069 • 2MASX J04413651-0148324 • GC 890 • H II 525 • GALEX ASC J044136.63-014831.4 • LDCE 311 NED010 | |
NGC 1638 is a lenticular galaxy of the Hubble type SB0 in the constellation Eridanus in the southern sky . It is estimated to be 145 million light years from the Milky Way and about 80,000 light years in diameter .
The object was discovered on February 1, 1786 by William Herschel with an 18.7-inch reflector and was later listed in the New General Catalog by Dreyer .