| Identification Data |
| Common Name | Arkab Posterior |
| Constellation | Saggitarius |
| Star Name | bet2Sgr |
| Skymap Number | 19230045 |
| Henry Draper (HD) Number | 181623 |
| Harvard Revised (HR) Number | 7343 |
| SAO Number | 229654 |
| Durchmusterung (DM) Number | CD-4513171 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 325051 |
| Right Ascension (RA) J2000 | 19h 23m 13.136s |
| Declination (Dec) J2000 | -44° 47' 59.203" |
| Position Uncertainty | 0.0095s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00872 |
| Proper Motion in Dec (J2000) | -0.053766 |
| Radial Velocity | +019.0km s-1 |
| Trigonometric Parallax | +0.02352s |
| Trigonometric Parallax Uncertainty | 0.00089s |
| GCI Unit Vector in X (J2000) | 0.252029 |
| GCI Unit Vector in Y (J2000) | -0.663307 |
| GCI Unit Vector in Z (J2000) | -0.704631 |
| Galactic Longitude | 353.29° |
Galactic Latitude
| -24.11°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.28 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 4.63 |
| Observed B-V Colour | +0.345 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.005 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.1 |
| Observed Photographic Magnitude | 4.8 |
| Morgan Keenan (MK) Spectral Type | F2III |
| One-Dimensional Spectral Class | F0 |
| Position Angle | |
| Year of Observation | AD |
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