| Identification Data |
| Common Name | |
| Constellation | Leo |
| Star Name | 81 Leo |
| Skymap Number | 11250099 |
| Henry Draper (HD) Number | 99285 |
| Harvard Revised (HR) Number | 4408 |
| SAO Number | 99601 |
| Durchmusterung (DM) Number | BD+17 2356 |
Washington Double Stars (WDS) Number
| 11256+1627
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 128245 |
| Right Ascension (RA) J2000 | 11h 25m 36.373s |
| Declination (Dec) J2000 | +16° 27' 23.539" |
| Position Uncertainty | 0.0084s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00981 |
| Proper Motion in Dec (J2000) | -0.004966 |
| Radial Velocity | +017.9km s-1 |
| Trigonometric Parallax | +0.02115s |
| Trigonometric Parallax Uncertainty | 0.00080s |
| GCI Unit Vector in X (J2000) | -0.948256 |
| GCI Unit Vector in Y (J2000) | 0.143384 |
| GCI Unit Vector in Z (J2000) | 0.283288 |
| Galactic Longitude | 236.77° |
Galactic Latitude
| 67.45°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.58 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
| Observed B Magnitude | 5.95 |
| Observed B-V Colour | +0.374 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.005 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.6 |
| Observed Photographic Magnitude | 5.8 |
| Morgan Keenan (MK) Spectral Type | F2V |
| One-Dimensional Spectral Class | F2 |
| Position Angle | 351 |
| Year of Observation | 1924. AD |
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