| Identification Data |
| Common Name | Nunki |
| Constellation | Saggitarius |
| Star Name | 34sig Sgr |
| Skymap Number | 18550060 |
| Henry Draper (HD) Number | 175191 |
| Harvard Revised (HR) Number | 7121 |
| SAO Number | 187448 |
| Durchmusterung (DM) Number | CD-2613595 |
Washington Double Stars (WDS) Number
| 18553-2618
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 269078 |
| Right Ascension (RA) J2000 | 18h 55m 15.925s |
| Declination (Dec) J2000 | -26° 17' 48.200" |
| Position Uncertainty | 0.0109s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00103 |
| Proper Motion in Dec (J2000) | -0.052766 |
| Radial Velocity | -011.2km s-1 |
| Trigonometric Parallax | +0.01454s |
| Trigonometric Parallax Uncertainty | 0.00088s |
| GCI Unit Vector in X (J2000) | 0.214097 |
| GCI Unit Vector in Y (J2000) | -0.870572 |
| GCI Unit Vector in Z (J2000) | -0.443020 |
| Galactic Longitude | 9.56° |
Galactic Latitude
| -12.43°
|
| Observational Data |
| Observed Visual Magnitude (V) | 2.07 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.005 |
| Observed B Magnitude | 1.93 |
| Observed B-V Colour | -0.138 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.006 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 2.1 |
| Observed Photographic Magnitude | 2.0 |
| Morgan Keenan (MK) Spectral Type | B2.5V |
| One-Dimensional Spectral Class | B3 |
| Position Angle | 244 |
| Year of Observation | 1837. AD |
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