| Identification Data |
| Common Name | Alzirr |
| Constellation | Gemini |
| Star Name | 31xi Gem |
| Skymap Number | 6450075 |
| Henry Draper (HD) Number | 48737 |
| Harvard Revised (HR) Number | 2484 |
| SAO Number | 96074 |
| Durchmusterung (DM) Number | BD+13 1396 |
Washington Double Stars (WDS) Number
|
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| Positional Data |
| Position and Proper Motion (PPM) Number | 122983 |
| Right Ascension (RA) J2000 | 6h 45m 17.364s |
| Declination (Dec) J2000 | +12° 53' 44.128" |
| Position Uncertainty | 0.0074s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00788 |
| Proper Motion in Dec (J2000) | -0.190966 |
| Radial Velocity | +025.3km s-1 |
| Trigonometric Parallax | +0.05702s |
| Trigonometric Parallax Uncertainty | 0.00083s |
| GCI Unit Vector in X (J2000) | -0.191377 |
| GCI Unit Vector in Y (J2000) | 0.955807 |
| GCI Unit Vector in Z (J2000) | 0.223175 |
| Galactic Longitude | 200.74° |
Galactic Latitude
| 4.50°
|
| Observational Data |
| Observed Visual Magnitude (V) | 3.34 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 3.80 |
| Observed B-V Colour | +0.457 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.003 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 3.4 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | F5III |
| One-Dimensional Spectral Class | F5 |
| Position Angle | |
| Year of Observation | AD |
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