Identification Data |
Common Name | Megrez |
Constellation | Ursa Major |
Star Name | 69del UMa |
Skymap Number | 12150059 |
Henry Draper (HD) Number | 106591 |
Harvard Revised (HR) Number | 4660 |
SAO Number | 28315 |
Durchmusterung (DM) Number | BD+57 1363 |
Washington Double Stars (WDS) Number
| 12154+5702
|
Positional Data |
Position and Proper Motion (PPM) Number | 33469 |
Right Ascension (RA) J2000 | 12h 15m 25.560s |
Declination (Dec) J2000 | +57° 1' 57.421" |
Position Uncertainty | 0.0068s |
Proper Motion in RA (J2000)/cos(Dec) | +0.01269 |
Proper Motion in Dec (J2000) | +0.007866 |
Radial Velocity | -013.4km s-1 |
Trigonometric Parallax | +0.04005s |
Trigonometric Parallax Uncertainty | 0.00060s |
GCI Unit Vector in X (J2000) | -0.542929 |
GCI Unit Vector in Y (J2000) | -0.036599 |
GCI Unit Vector in Z (J2000) | 0.838980 |
Galactic Longitude | 132.56° |
Galactic Latitude
| 59.42°
|
Observational Data |
Observed Visual Magnitude (V) | 3.30 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
Observed B Magnitude | 3.39 |
Observed B-V Colour | +0.092 |
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 | 3.3 |
Morgan Keenan (MK) Spectral Type | A3V |
One-Dimensional Spectral Class | A2 |
Position Angle | 73 |
Year of Observation | 1923. AD |