| Identification Data |
| Common Name | |
| Constellation | Leo |
| Star Name | 84tau Leo |
| Skymap Number | 11270140 |
| Henry Draper (HD) Number | 99648 |
| Harvard Revised (HR) Number | 4418 |
| SAO Number | 118875 |
| Durchmusterung (DM) Number | BD+03 2504 |
Washington Double Stars (WDS) Number
| 11279+0251
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 157884 |
| Right Ascension (RA) J2000 | 11h 27m 56.240s |
| Declination (Dec) J2000 | +2° 51' 22.555" |
| Position Uncertainty | 0.0096s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00116 |
| Proper Motion in Dec (J2000) | -0.010466 |
| Radial Velocity | -009.1km s-1 |
| Trigonometric Parallax | +0.00525s |
| Trigonometric Parallax Uncertainty | 0.00084s |
| GCI Unit Vector in X (J2000) | -0.989000 |
| GCI Unit Vector in Y (J2000) | 0.139271 |
| GCI Unit Vector in Z (J2000) | 0.049831 |
| Galactic Longitude | 259.91° |
Galactic Latitude
| 58.57°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.94 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
| Observed B Magnitude | 5.94 |
| Observed B-V Colour | +1.001 |
| 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 | 5.2 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | G7.5IIIa |
| One-Dimensional Spectral Class | K0 |
| Position Angle | 180 |
| Year of Observation | 1985. AD |
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