NGC 6438
| Galaxy NGC 6438 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Octant |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 18 h 22 m 17.5 s |
| declination | -85 ° 24 ′ 07 ″ |
| Appearance | |
| Morphological type | S0 pec (ring A) |
| Brightness (visual) | 11.7 mag |
| Brightness (B-band) | 12.7 mag |
| Angular expansion | 1.6 ′ × 1.4 ′ |
| Position angle | 156 ° |
| Surface brightness | 12.5 mag / arcmin² |
| Physical data | |
| Affiliation | LGG 417 |
| Redshift | 0.008129 +/- 0.000070 |
| Radial velocity | 2437 +/- 21 km / s |
|
Stroke distance v rad / H 0 |
(102 ± 7) · 10 6 ly (31.2 ± 2.2) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | June 2, 1835 |
| Catalog names | |
| NGC 6438 • PGC 61787 • ESO 010-001 • IRAS 18061-8525 • SGC 180551-8525.1 • VV 682 • GC 4330 • h 3701 • LDCE 1255 NED003 | |
NGC 6438 is an 11.7 mag bright, lens-shaped galaxy of the Hubble-type S0 in the constellation Octant and about 102 million light-years away from the Milky Way. It has a strong interaction with PGC 61793 (also called NGC 6438A ).
It was discovered together with this on June 2, 1835 by John Herschel with an 18-inch reflector telescope, who noted "pB, R, vgbM".