Identification Data |
Common Name | |
Constellation | Octans |
Star Name | alp Oct |
Skymap Number | 21040133 |
Henry Draper (HD) Number | 199532 |
Harvard Revised (HR) Number | 8021 |
SAO Number | 257879 |
Durchmusterung (DM) Number | CP-77 1474 |
Washington Double Stars (WDS) Number
|
|
Positional Data |
Position and Proper Motion (PPM) Number | 374864 |
Right Ascension (RA) J2000 | 21h 4m 43.064s |
Declination (Dec) J2000 | -77° 1' 25.562" |
Position Uncertainty | 0.0070s |
Proper Motion in RA (J2000)/cos(Dec) | +0.00411 |
Proper Motion in Dec (J2000) | -0.369466 |
Radial Velocity | +045.0km s-1 |
Trigonometric Parallax | +0.02207s |
Trigonometric Parallax Uncertainty | 0.00057s |
GCI Unit Vector in X (J2000) | 0.162013 |
GCI Unit Vector in Y (J2000) | -0.155477 |
GCI Unit Vector in Z (J2000) | -0.974463 |
Galactic Longitude | 315.97° |
Galactic Latitude
| -33.65°
|
Observational Data |
Observed Visual Magnitude (V) | 5.13 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
Observed B Magnitude | 5.63 |
Observed B-V Colour | +0.501 |
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 | 5.2 |
Observed Photographic Magnitude | |
Morgan Keenan (MK) Spectral Type | A7III+G2III |
One-Dimensional Spectral Class | F2 |
Position Angle | |
Year of Observation | AD |