| Identification Data |
| Common Name | Dheneb |
| Constellation | Cetus |
| Star Name | 31eta Cet |
| Skymap Number | 1080091 |
| Henry Draper (HD) Number | 6805 |
| Harvard Revised (HR) Number | 334 |
| SAO Number | 147632 |
| Durchmusterung (DM) Number | SD-10 240 |
Washington Double Stars (WDS) Number
| 01086-1011
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 209790 |
| Right Ascension (RA) J2000 | 1h 8m 35.391s |
| Declination (Dec) J2000 | -10° 10' 56.151" |
| Position Uncertainty | 0.0074s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.01462 |
| Proper Motion in Dec (J2000) | -0.138366 |
| Radial Velocity | +011.5km s-1 |
| Trigonometric Parallax | +0.02773s |
| Trigonometric Parallax Uncertainty | 0.00071s |
| GCI Unit Vector in X (J2000) | 0.940500 |
| GCI Unit Vector in Y (J2000) | 0.290189 |
| GCI Unit Vector in Z (J2000) | -0.176780 |
| Galactic Longitude | 137.17° |
Galactic Latitude
| -72.58°
|
| Observational Data |
| Observed Visual Magnitude (V) | 3.46 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
| Observed B Magnitude | 4.63 |
| Observed B-V Colour | +1.165 |
| 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 | 3.6 |
| Observed Photographic Magnitude | 4.6 |
| Morgan Keenan (MK) Spectral Type | K2-IIICN0.5 |
| One-Dimensional Spectral Class | K0 |
| Position Angle | 305 |
| Year of Observation | 1907. AD |
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