| Identification Data |
| Common Name | |
| Constellation | Monoceros |
| Star Name | 21 Mon |
| Skymap Number | 7110106 |
| Henry Draper (HD) Number | 55057 |
| Harvard Revised (HR) Number | 2707 |
| SAO Number | 134316 |
| Durchmusterung (DM) Number | BD-00 1634 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 176739 |
| Right Ascension (RA) J2000 | 7h 11m 23.615s |
| Declination (Dec) J2000 | -0° 18' 6.940" |
| Position Uncertainty | 0.0084s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00183 |
| Proper Motion in Dec (J2000) | -0.009166 |
| Radial Velocity | +030.0km s-1 |
| Trigonometric Parallax | +0.01249s |
| Trigonometric Parallax Uncertainty | 0.00075s |
| GCI Unit Vector in X (J2000) | -0.306495 |
| GCI Unit Vector in Y (J2000) | 0.951858 |
| GCI Unit Vector in Z (J2000) | -0.005270 |
| Galactic Longitude | 215.49° |
Galactic Latitude
| 4.30°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.43 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.005 |
| Observed B Magnitude | 5.73 |
| Observed B-V Colour | +0.303 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.007 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.4 |
| Observed Photographic Magnitude | 5.5 |
| Morgan Keenan (MK) Spectral Type | A8Vn-F3Vn |
| One-Dimensional Spectral Class | F0 |
| Position Angle | |
| Year of Observation | AD |
