| Identification Data |
| Common Name | Herschel's "Garnet Star" |
| Constellation | Cepheus |
| Star Name | mu Cep |
| Skymap Number | 21430096 |
| Henry Draper (HD) Number | 206936 |
| Harvard Revised (HR) Number | 8316 |
| SAO Number | 33693 |
| Durchmusterung (DM) Number | BD+58 2316 |
Washington Double Stars (WDS) Number
| 21435+5847
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 39787 |
| Right Ascension (RA) J2000 | 21h 43m 30.460s |
| Declination (Dec) J2000 | +58° 46' 48.166" |
| Position Uncertainty | 0.0060s |
| Proper Motion in RA (J2000)/cos(Dec) | +0.00067 |
| Proper Motion in Dec (J2000) | -0.002966 |
| Radial Velocity | +019.4km s-1 |
| Trigonometric Parallax | +0.00062s |
| Trigonometric Parallax Uncertainty | 0.00052s |
| GCI Unit Vector in X (J2000) | 0.429087 |
| GCI Unit Vector in Y (J2000) | -0.290766 |
| GCI Unit Vector in Z (J2000) | 0.855184 |
| Galactic Longitude | 100.60° |
Galactic Latitude
| 4.32°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.02 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.022 |
| Observed B Magnitude | 6.25 |
| Observed B-V Colour | +2.233 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.026 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | |
| Observed Photographic Magnitude | 6.5 |
| Morgan Keenan (MK) Spectral Type | M2-Ia |
| One-Dimensional Spectral Class | M0 |
| Position Angle | 260 |
| Year of Observation | 1946. AD |
