NGC 1688
 
NGC 1688 is a barred spiral galaxy located in the constellation of Dorado. The NGC is a catalog of 7,840 nebulae, star clusters, and galaxies. Here are the key stats on NGC 1688:
| NGC: | NGC 1688 | 
| Type: | galaxy | 
| Galaxy type: | barred spiral | 
| Galaxy morph class: | SBc | 
| Constellation: | Dorado | 
| Surface brightness: | 22.4 mag/arcsec2 | 
| V-mag (visual): | 11.8 | 
| B-mag (blue): | 12.1 | 
| J-mag (IR): | 10.5 | 
| H-mag (IR): | |
| K-mag (IR): | 10 | 
| Right Ascension: | 04:48:23.79 | 
| Declination: | -59:48:01.20 | 
| Major axis: | 2.47 ' | 
| Minor axis: | 1.67 ' | 
| Angle (major axis): | 166° | 
| Radial velocity: | 1225 km/s | 
| Redshift: | 0.004093 | 
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS