| Identification Data |
| Common Name | |
| Constellation | Perseus |
| Star Name | 12 Per |
| Skymap Number | 2420045 |
| Henry Draper (HD) Number | 16739 |
| Harvard Revised (HR) Number | 788 |
| SAO Number | 55793 |
| Durchmusterung (DM) Number | BD+39 610 |
Washington Double Stars (WDS) Number
| 02422+4012
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 45381 |
| Right Ascension (RA) J2000 | 2h 42m 14.916s |
| Declination (Dec) J2000 | +40° 11' 38.198" |
| Position Uncertainty | 0.0108s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00147 |
| Proper Motion in Dec (J2000) | -0.182366 |
| Radial Velocity | -022.5km s-1 |
| Trigonometric Parallax | +0.04052s |
| Trigonometric Parallax Uncertainty | 0.00125s |
| GCI Unit Vector in X (J2000) | 0.580308 |
| GCI Unit Vector in Y (J2000) | 0.496720 |
| GCI Unit Vector in Z (J2000) | 0.645377 |
| Galactic Longitude | 144.85° |
Galactic Latitude
| -17.91°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.90 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 5.48 |
| Observed B-V Colour | +0.582 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.004 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.0 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | F9V |
| One-Dimensional Spectral Class | G0 |
| Position Angle | |
| Year of Observation | 1991. AD |
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