NGC 1666
 
NGC 1666 is a lenticular galaxy located in the constellation of Eridanus. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 1666:
| NGC: | NGC 1666 | 
| Type: | galaxy | 
| Galaxy type: | lenticular | 
| Galaxy morph class: | S0-a | 
| Constellation: | Eridanus | 
| Surface brightness: | 23.0 mag/arcsec2 | 
| V-mag (visual): | 12.7 | 
| B-mag (blue): | 13.6 | 
| J-mag (IR): | 10.3 | 
| H-mag (IR): | |
| K-mag (IR): | 9.69 | 
| Right Ascension: | 04:48:32.84 | 
| Declination: | -06:34:11.90 | 
| Major axis: | 1.35 ' | 
| Minor axis: | 1.26 ' | 
| Angle (major axis): | 160° | 
| Radial velocity: | 2752 km/s | 
| Redshift: | 0.009223 | 
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS