Identification Data |
Common Name | Marfak |
Constellation | Cassiopeia |
Star Name | 30mu Cas |
Skymap Number | 1070126 |
Henry Draper (HD) Number | 6582 |
Harvard Revised (HR) Number | 321 |
SAO Number | 22024 |
Durchmusterung (DM) Number | BD+54 223 |
Washington Double Stars (WDS) Number
| 01083+5455
|
Positional Data |
Position and Proper Motion (PPM) Number | 26046 |
Right Ascension (RA) J2000 | 1h 8m 16.394s |
Declination (Dec) J2000 | +54° 55' 13.221" |
Position Uncertainty | 0.0052s |
Proper Motion in RA (J2000)/cos(Dec) | +0.39694 |
Proper Motion in Dec (J2000) | -1.600466 |
Radial Velocity | -098.1km s-1 |
Trigonometric Parallax | +0.13242s |
Trigonometric Parallax Uncertainty | 0.00060s |
GCI Unit Vector in X (J2000) | 0.549402 |
GCI Unit Vector in Y (J2000) | 0.168685 |
GCI Unit Vector in Z (J2000) | 0.818354 |
Galactic Longitude | 125.33° |
Galactic Latitude
| -7.85°
|
Observational Data |
Observed Visual Magnitude (V) | 5.17 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | |
Observed B Magnitude | 5.87 |
Observed B-V Colour | +0.704 |
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 | 5.3 |
Observed Photographic Magnitude | 5.2 |
Morgan Keenan (MK) Spectral Type | G5Vb |
One-Dimensional Spectral Class | G5 |
Position Angle | 334 |
Year of Observation | 1974. AD |