| Identification Data |
| Common Name | Rasalgethi |
| Constellation | Hercules |
| Star Name | 64alp1Her |
| Skymap Number | 17140177 |
| Henry Draper (HD) Number | 156014 |
| Harvard Revised (HR) Number | 6406 |
| SAO Number | 102680 |
| Durchmusterung (DM) Number | BD+14 3207 |
Washington Double Stars (WDS) Number
| 17146+1423
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 400225 |
| Right Ascension (RA) J2000 | 17h 14m 38.858s |
| Declination (Dec) J2000 | +14° 23' 25.198" |
| Position Uncertainty | 0.0243s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00046 |
| Proper Motion in Dec (J2000) | +0.032867 |
| Radial Velocity | -032.5km s-1 |
| Trigonometric Parallax | +0.00853s |
| Trigonometric Parallax Uncertainty | 0.00280s |
| GCI Unit Vector in X (J2000) | -0.190430 |
| GCI Unit Vector in Y (J2000) | -0.949722 |
| GCI Unit Vector in Z (J2000) | 0.248526 |
| Galactic Longitude | 35.54° |
Galactic Latitude
| 27.82°
|
| Observational Data |
| Observed Visual Magnitude (V) | 2.7 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | |
| Observed B Magnitude | 4.92 |
| Observed B-V Colour | +1.44 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.050 |
| Observed U Magnitude | 5.93 |
| Observed U-B Colour | +1.01 |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | 0.050 |
| Observed Photovisual Magnitude | 3.5 |
| Observed Photographic Magnitude | 4.8 |
| Morgan Keenan (MK) Spectral Type | M5Ib-II |
| One-Dimensional Spectral Class | Mb |
| Position Angle | 106 |
| Year of Observation | 1993. AD |
