| Identification Data |
| Common Name | |
| Constellation | Hercules |
| Star Name | 42 Her |
| Skymap Number | 16380132 |
| Henry Draper (HD) Number | 150450 |
| Harvard Revised (HR) Number | 6200 |
| SAO Number | 46210 |
| Durchmusterung (DM) Number | BD+49 2531 |
Washington Double Stars (WDS) Number
| 16387+4856
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 55566 |
| Right Ascension (RA) J2000 | 16h 38m 44.845s |
| Declination (Dec) J2000 | +48° 55' 42.033" |
| Position Uncertainty | 0.0060s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00488 |
| Proper Motion in Dec (J2000) | +0.026866 |
| Radial Velocity | -055.2km s-1 |
| Trigonometric Parallax | +0.00867s |
| Trigonometric Parallax Uncertainty | 0.00046s |
| GCI Unit Vector in X (J2000) | -0.228079 |
| GCI Unit Vector in Y (J2000) | -0.616143 |
| GCI Unit Vector in Z (J2000) | 0.753888 |
| Galactic Longitude | 75.61° |
Galactic Latitude
| 41.58°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.88 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.003 |
| Observed B Magnitude | 6.43 |
| Observed B-V Colour | +1.547 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.005 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 5.1 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | M2.5IIIab |
| One-Dimensional Spectral Class | M0 |
| Position Angle | 92 |
| Year of Observation | 1958. AD |
