NGC 6918
| Galaxy NGC 6918 |
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|---|---|
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| AladinLite | |
| Constellation | telescope |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 20 h 30 m 47.1 s |
| declination | -47 ° 28 ′ 25 ″ |
| Appearance | |
| Morphological type | (R) SAB (rs) a / HII |
| Brightness (visual) | 13.6 mag |
| Brightness (B-band) | 14.5 mag |
| Angular expansion | 0.9 '× 0.7' |
| Position angle | 178 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Redshift | 0.017409 ± 0.000150 |
| Radial velocity | 5219 ± 45 km / s |
|
Stroke distance v rad / H 0 |
(232 ± 16) x 10 6 ly (71.2 ± 5.0) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | July 1, 1834 |
| Catalog names | |
| NGC 6918 • PGC 64851 • ESO 234-040 • IRAS 20272-4738 • 2MASX J20304713-4728256 • SGC 202715-4738.4 • GALEX ASC J203047.07-472827.0 | |
NGC 6918 is a lenticular galaxy with extensive star formation regions of the Hubble type SB0 / a in the constellation Telescopium in the southern sky . It is estimated to be 232 million light years away from the Milky Way and has a diameter of about 60,000 ly.
In the same area of the sky is the galaxy NGC 6909 , among others .
The object was discovered by John Herschel on July 1, 1834 (listed as an NGC object).