Identification Data |
Common Name | |
Constellation | Perseus |
Star Name | 40 Per |
Skymap Number | 3420057 |
Henry Draper (HD) Number | 22951 |
Harvard Revised (HR) Number | 1123 |
SAO Number | 56646 |
Durchmusterung (DM) Number | BD+33 698 |
Washington Double Stars (WDS) Number
| 03424+3358
|
Positional Data |
Position and Proper Motion (PPM) Number | 68705 |
Right Ascension (RA) J2000 | 3h 42m 22.646s |
Declination (Dec) J2000 | +33° 57' 54.095" |
Position Uncertainty | 0.0114s |
Proper Motion in RA (J2000)/cos(Dec) | +0.00035 |
Proper Motion in Dec (J2000) | -0.005266 |
Radial Velocity | +022.3km s-1 |
Trigonometric Parallax | +0.00353s |
Trigonometric Parallax Uncertainty | 0.00088s |
GCI Unit Vector in X (J2000) | 0.468639 |
GCI Unit Vector in Y (J2000) | 0.684285 |
GCI Unit Vector in Z (J2000) | 0.558687 |
Galactic Longitude | 158.93° |
Galactic Latitude
| -16.70°
|
Observational Data |
Observed Visual Magnitude (V) | 4.98 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
Observed B Magnitude | 4.93 |
Observed B-V Colour | -0.051 |
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 | 4.8 |
Morgan Keenan (MK) Spectral Type | B0.5V |
One-Dimensional Spectral Class | B2 |
Position Angle | 238 |
Year of Observation | 1925. AD |