Identification Data |
Common Name | Alula Borealis |
Constellation | Ursa Major |
Star Name | 54nu UMa |
Skymap Number | 11180058 |
Henry Draper (HD) Number | 98262 |
Harvard Revised (HR) Number | 4377 |
SAO Number | 62486 |
Durchmusterung (DM) Number | BD+33 2098 |
Washington Double Stars (WDS) Number
| 11185+3306
|
Positional Data |
Position and Proper Motion (PPM) Number | 75790 |
Right Ascension (RA) J2000 | 11h 18m 28.736s |
Declination (Dec) J2000 | +33° 5' 39.500" |
Position Uncertainty | 0.0091s |
Proper Motion in RA (J2000)/cos(Dec) | -0.00212 |
Proper Motion in Dec (J2000) | +0.027566 |
Radial Velocity | -009.2km s-1 |
Trigonometric Parallax | +0.00774s |
Trigonometric Parallax Uncertainty | 0.00079s |
GCI Unit Vector in X (J2000) | -0.824062 |
GCI Unit Vector in Y (J2000) | 0.150950 |
GCI Unit Vector in Z (J2000) | 0.546019 |
Galactic Longitude | 190.74° |
Galactic Latitude
| 69.08°
|
Observational Data |
Observed Visual Magnitude (V) | 3.49 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
Observed B Magnitude | 4.90 |
Observed B-V Colour | +1.406 |
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 | 3.7 |
Observed Photographic Magnitude | |
Morgan Keenan (MK) Spectral Type | K3-III |
One-Dimensional Spectral Class | K0 |
Position Angle | 147 |
Year of Observation | 1973. AD |