NGC 1681
 
NGC 1681 is a spiral 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 1681:
| NGC: | NGC 1681 | 
| Type: | galaxy | 
| Galaxy type: | spiral | 
| Galaxy morph class: | Sb | 
| Constellation: | Eridanus | 
| Surface brightness: | 22.6 mag/arcsec2 | 
| V-mag (visual): | 13.4 | 
| B-mag (blue): | 13.6 | 
| J-mag (IR): | 11.1 | 
| H-mag (IR): | |
| K-mag (IR): | 10.5 | 
| Right Ascension: | 04:51:50.06 | 
| Declination: | -05:48:11.60 | 
| Major axis: | 1.19 ' | 
| Minor axis: | 0.95 ' | 
| Angle (major axis): | 80° | 
| Radial velocity: | 2731 km/s | 
| Redshift: | 0.00915 | 
Right Ascension (RA) units = HH:MM:SS.SS
Declination (Dec) units = DD:MM:SS.SS