| Identification Data |
| Common Name | |
| Constellation | Equuleus |
| Star Name | 3 Equ |
| Skymap Number | 21040115 |
| Henry Draper (HD) Number | 200644 |
| Harvard Revised (HR) Number | 8066 |
| SAO Number | 126518 |
| Durchmusterung (DM) Number | BD+04 4606 |
Washington Double Stars (WDS) Number
| 21046+0530
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 171225 |
| Right Ascension (RA) J2000 | 21h 4m 34.652s |
| Declination (Dec) J2000 | +5° 30' 10.302" |
| Position Uncertainty | 0.0087s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00095 |
| Proper Motion in Dec (J2000) | +0.000566 |
| Radial Velocity | -015.7km s-1 |
| Trigonometric Parallax | +0.00474s |
| Trigonometric Parallax Uncertainty | 0.00082s |
| GCI Unit Vector in X (J2000) | 0.717765 |
| GCI Unit Vector in Y (J2000) | -0.689650 |
| GCI Unit Vector in Z (J2000) | 0.095895 |
| Galactic Longitude | 54.84° |
Galactic Latitude
| -26.26°
|
| Observational Data |
| Observed Visual Magnitude (V) | 5.61 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.004 |
| Observed B Magnitude | 7.27 |
| Observed B-V Colour | +1.660 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.008 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.9 |
| Observed Photographic Magnitude | 7.1 |
| Morgan Keenan (MK) Spectral Type | K5III |
| One-Dimensional Spectral Class | K2 |
| Position Angle | 252 |
| Year of Observation | 1960. AD |
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