| Identification Data |
| Common Name | |
| Constellation | Leo |
| Star Name | 42 Leo |
| Skymap Number | 10210128 |
| Henry Draper (HD) Number | 89774 |
| Harvard Revised (HR) Number | 4070 |
| SAO Number | 99080 |
| Durchmusterung (DM) Number | BD+15 2192 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 127335 |
| Right Ascension (RA) J2000 | 10h 21m 50.303s |
| Declination (Dec) J2000 | +14° 58' 32.784" |
| Position Uncertainty | 0.0093s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00222 |
| Proper Motion in Dec (J2000) | -0.011366 |
| Radial Velocity | +008.7km s-1 |
| Trigonometric Parallax | +0.00685s |
| Trigonometric Parallax Uncertainty | 0.00084s |
| GCI Unit Vector in X (J2000) | -0.878772 |
| GCI Unit Vector in Y (J2000) | 0.401228 |
| GCI Unit Vector in Z (J2000) | 0.258411 |
| Galactic Longitude | 224.50° |
Galactic Latitude
| 53.21°
|
| Observational Data |
| Observed Visual Magnitude (V) | 6.17 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.005 |
| Observed B Magnitude | 6.17 |
| Observed B-V Colour | -0.005 |
| 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 | 6.1 |
| Observed Photographic Magnitude | 6.0 |
| Morgan Keenan (MK) Spectral Type | A1V |
| One-Dimensional Spectral Class | B9 |
| Position Angle | |
| Year of Observation | AD |
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