| Identification Data |
| Common Name | |
| Constellation | Orion |
| Star Name | 21 Ori |
| Skymap Number | 5190043 |
| Henry Draper (HD) Number | 34658 |
| Harvard Revised (HR) Number | 1746 |
| SAO Number | 112624 |
| Durchmusterung (DM) Number | BD+02 916 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 148749 |
| Right Ascension (RA) J2000 | 5h 19m 11.219s |
| Declination (Dec) J2000 | +2° 35' 44.903" |
| Position Uncertainty | 0.0109s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00121 |
| Proper Motion in Dec (J2000) | -0.053366 |
| Radial Velocity | +011.0km s-1 |
| Trigonometric Parallax | +0.01647s |
| Trigonometric Parallax Uncertainty | 0.00121s |
| GCI Unit Vector in X (J2000) | 0.176959 |
| GCI Unit Vector in Y (J2000) | 0.983176 |
| GCI Unit Vector in Z (J2000) | 0.045290 |
| Galactic Longitude | 199.55° |
Galactic Latitude
| -19.12°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.34 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.76 |
| Observed B-V Colour | +0.422 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.006 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.5 |
| Observed Photographic Magnitude | 5.7 |
| Morgan Keenan (MK) Spectral Type | F5II |
| One-Dimensional Spectral Class | F5 |
| Position Angle | |
| Year of Observation | AD |
