| Identification Data |
| Common Name | |
| Constellation | Eridanus |
| Star Name | 57mu Eri |
| Skymap Number | 4450071 |
| Henry Draper (HD) Number | 30211 |
| Harvard Revised (HR) Number | 1520 |
| SAO Number | 131468 |
| Durchmusterung (DM) Number | SD-03 876 |
Washington Double Stars (WDS) Number
|
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 187297 |
| Right Ascension (RA) J2000 | 4h 45m 30.151s |
| Declination (Dec) J2000 | -3° 15' 16.767" |
| Position Uncertainty | 0.0135s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00115 |
| Proper Motion in Dec (J2000) | -0.013566 |
| Radial Velocity | +008.5km s-1 |
| Trigonometric Parallax | +0.00613s |
| Trigonometric Parallax Uncertainty | 0.00103s |
| GCI Unit Vector in X (J2000) | 0.318847 |
| GCI Unit Vector in Y (J2000) | 0.946104 |
| GCI Unit Vector in Z (J2000) | -0.056774 |
| Galactic Longitude | 200.53° |
Galactic Latitude
| -29.34°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.02 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 3.89 |
| Observed B-V Colour | -0.133 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.004 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.2 |
| Observed Photographic Magnitude | 4.1 |
| Morgan Keenan (MK) Spectral Type | B5IV |
| One-Dimensional Spectral Class | B5 |
| Position Angle | |
| Year of Observation | AD |
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