NGC 6438
Galaxy NGC 6438 |
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AladinLite | |
Constellation | Octant |
Position equinox : J2000.0 , epoch : J2000.0 |
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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".