NGC 3998
NGC 3998 is a lenticular galaxy located in the constellation Ursa Major. Some key stats include:
| NGC: | NGC 3998 |
| Type: | galaxy |
| Galaxy type: | lenticular |
| Galaxy morph class: | S0 |
| Constellation: | Ursa Major |
| Surface brightness: | 22.3 mag/arcsec2 |
| V-magnitude (visual): | 11.3 |
| B-magnitude (blue): | 11.4 |
| J-magnitude (IR): | 8.33 |
| H-magnitude (IR): | |
| K-magnitude (IR): | 7.58 |
| Right Ascension: | 11:57:56.13 |
| Declination: | 55:27:12.90 |
| Major axis: | 2.78 ' |
| Minor axis: | 2.26 ' |
| Angle (major axis): | 139° |
| Radial velocity: | 1091 km/s |
| Redshift: | 0.003646 |
Right Ascension units = HH:MM:SS.SS
Declination units = DD:MM:SS.SS
PN = planetary nebula