NGC 1691
NGC 1691 is a lenticular galaxy located in the constellation Orion. Some key stats include:
| NGC: | NGC 1691 |
| Type: | galaxy |
| Galaxy type: | lenticular |
| Galaxy morph class: | S0-a |
| Constellation: | Orion |
| Surface brightness: | 22.7 mag/arcsec2 |
| B-magnitude (blue): | 13.1 |
| J-magnitude (IR): | 10.2 |
| H-magnitude (IR): | |
| K-magnitude (IR): | 9.54 |
| Right Ascension: | 04:54:38.34 |
| Declination: | 03:16:04.70 |
| Major axis: | 1.54 ' |
| Minor axis: | 1.47 ' |
| Angle (major axis): | 30° |
| Radial velocity: | 4577 km/s |
| Redshift: | 0.015384 |
Right Ascension units = HH:MM:SS.SS
Declination units = DD:MM:SS.SS
PN = planetary nebula