| Identification Data |
| Common Name | |
| Constellation | Leo |
| Star Name | 40 Leo |
| Skymap Number | 10190110 |
| Henry Draper (HD) Number | 89449 |
| Harvard Revised (HR) Number | 4054 |
| SAO Number | 99065 |
| Durchmusterung (DM) Number | BD+20 2466 |
Washington Double Stars (WDS) Number
|
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| Positional Data |
| Position and Proper Motion (PPM) Number | 127314 |
| Right Ascension (RA) J2000 | 10h 19m 44.167s |
| Declination (Dec) J2000 | +19° 28' 15.291" |
| Position Uncertainty | 0.0093s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.01626 |
| Proper Motion in Dec (J2000) | -0.214766 |
| Radial Velocity | +006.5km s-1 |
| Trigonometric Parallax | +0.04724s |
| Trigonometric Parallax Uncertainty | 0.00082s |
| GCI Unit Vector in X (J2000) | -0.854017 |
| GCI Unit Vector in Y (J2000) | 0.399433 |
| GCI Unit Vector in Z (J2000) | 0.333328 |
| Galactic Longitude | 217.13° |
Galactic Latitude
| 54.48°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.78 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.25 |
| Observed B-V Colour | +0.473 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.004 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.0 |
| Observed Photographic Magnitude | 5.0 |
| Morgan Keenan (MK) Spectral Type | F6IV |
| One-Dimensional Spectral Class | F5 |
| Position Angle | |
| Year of Observation | AD |
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