| Identification Data |
| Common Name | |
| Constellation | Lacerta |
| Star Name | 2 Lac |
| Skymap Number | 22210008 |
| Henry Draper (HD) Number | 212120 |
| Harvard Revised (HR) Number | 8523 |
| SAO Number | 51904 |
| Durchmusterung (DM) Number | BD+45 3894 |
Washington Double Stars (WDS) Number
| 22210+4632
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 62818 |
| Right Ascension (RA) J2000 | 22h 21m 1.546s |
| Declination (Dec) J2000 | +46° 32' 11.650" |
| Position Uncertainty | 0.0047s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00211 |
| Proper Motion in Dec (J2000) | +0.001966 |
| Radial Velocity | -009.5km s-1 |
| Trigonometric Parallax | +0.00640s |
| Trigonometric Parallax Uncertainty | 0.00052s |
| GCI Unit Vector in X (J2000) | 0.624736 |
| GCI Unit Vector in Y (J2000) | -0.287922 |
| GCI Unit Vector in Z (J2000) | 0.725814 |
| Galactic Longitude | 97.80° |
Galactic Latitude
| -8.86°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.56 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 4.46 |
| Observed B-V Colour | -0.104 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.002 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.7 |
| Observed Photographic Magnitude | 4.5 |
| Morgan Keenan (MK) Spectral Type | B6V |
| One-Dimensional Spectral Class | B5 |
| Position Angle | 7 |
| Year of Observation | 1959. AD |
