| Identification Data |
| Common Name | Alterf |
| Constellation | Leo |
| Star Name | 4lam Leo |
| Skymap Number | 9310141 |
| Henry Draper (HD) Number | 82308 |
| Harvard Revised (HR) Number | 3773 |
| SAO Number | 80885 |
| Durchmusterung (DM) Number | BD+23 2107 |
Washington Double Stars (WDS) Number
|
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| Positional Data |
| Position and Proper Motion (PPM) Number | 99651 |
| Right Ascension (RA) J2000 | 9h 31m 43.228s |
| Declination (Dec) J2000 | +22° 58' 4.694" |
| Position Uncertainty | 0.0092s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00140 |
| Proper Motion in Dec (J2000) | -0.039066 |
| Radial Velocity | +026.7km s-1 |
| Trigonometric Parallax | +0.00969s |
| Trigonometric Parallax Uncertainty | 0.00089s |
| GCI Unit Vector in X (J2000) | -0.734646 |
| GCI Unit Vector in Y (J2000) | 0.555001 |
| GCI Unit Vector in Z (J2000) | 0.390216 |
| Galactic Longitude | 206.70° |
Galactic Latitude
| 44.86°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.30 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.84 |
| Observed B-V Colour | +1.540 |
| 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 | 4.5 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | K4.5IIIb |
| One-Dimensional Spectral Class | K5 |
| Position Angle | |
| Year of Observation | AD |
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