| Identification Data |
| Common Name | |
| Constellation | Ursa Minor |
| Star Name | 21eta UMi |
| Skymap Number | 16170073 |
| Henry Draper (HD) Number | 148048 |
| Harvard Revised (HR) Number | 6116 |
| SAO Number | 8470 |
| Durchmusterung (DM) Number | BD+76 596 |
Washington Double Stars (WDS) Number
| 16175+7545
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 9157 |
| Right Ascension (RA) J2000 | 16h 17m 30.287s |
| Declination (Dec) J2000 | +75° 45' 19.190" |
| Position Uncertainty | 0.0063s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.02437 |
| Proper Motion in Dec (J2000) | +0.257866 |
| Radial Velocity | -009.5km s-1 |
| Trigonometric Parallax | +0.03352s |
| Trigonometric Parallax Uncertainty | 0.00047s |
| GCI Unit Vector in X (J2000) | -0.106413 |
| GCI Unit Vector in Y (J2000) | -0.221864 |
| GCI Unit Vector in Z (J2000) | 0.969254 |
| Galactic Longitude | 109.27° |
Galactic Latitude
| 35.33°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.96 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 5.34 |
| Observed B-V Colour | +0.376 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.003 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.0 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | F5V |
| One-Dimensional Spectral Class | F0 |
| Position Angle | 125 |
| Year of Observation | 1966. AD |
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