| Identification Data |
| Common Name | |
| Constellation | Octans |
| Star Name | tau Oct |
| Skymap Number | 23270080 |
| Henry Draper (HD) Number | 219765 |
| Harvard Revised (HR) Number | 8862 |
| SAO Number | 258970 |
| Durchmusterung (DM) Number | CP-88 204 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 378842 |
| Right Ascension (RA) J2000 | 23h 28m 3.783s |
| Declination (Dec) J2000 | -87° 28' 55.970" |
| Position Uncertainty | 0.0061s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.02472 |
| Proper Motion in Dec (J2000) | +0.011566 |
| Radial Velocity | +031.0km s-1 |
| Trigonometric Parallax | +0.00624s |
| Trigonometric Parallax Uncertainty | 0.00052s |
| GCI Unit Vector in X (J2000) | 0.043504 |
| GCI Unit Vector in Y (J2000) | -0.006102 |
| GCI Unit Vector in Z (J2000) | -0.999035 |
| Galactic Longitude | 303.96° |
Galactic Latitude
| -29.48°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.50 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 6.79 |
| Observed B-V Colour | +1.288 |
| 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 | 5.6 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | K2III |
| One-Dimensional Spectral Class | K0 |
| Position Angle | |
| Year of Observation | AD |
