Identification Data |
Common Name | |
Constellation | Hercules |
Star Name | 102 Her |
Skymap Number | 18080161 |
Henry Draper (HD) Number | 166182 |
Harvard Revised (HR) Number | 6787 |
SAO Number | 85769 |
Durchmusterung (DM) Number | BD+20 3674 |
Washington Double Stars (WDS) Number
| 18088+2049
|
Positional Data |
Position and Proper Motion (PPM) Number | 106829 |
Right Ascension (RA) J2000 | 18h 8m 45.490s |
Declination (Dec) J2000 | +20° 48' 52.405" |
Position Uncertainty | 0.0060s |
Proper Motion in RA (J2000)/cos(Dec) | -0.00019 |
Proper Motion in Dec (J2000) | -0.006266 |
Radial Velocity | -014.7km s-1 |
Trigonometric Parallax | +0.00214s |
Trigonometric Parallax Uncertainty | 0.00063s |
GCI Unit Vector in X (J2000) | 0.035712 |
GCI Unit Vector in Y (J2000) | -0.934053 |
GCI Unit Vector in Z (J2000) | 0.355344 |
Galactic Longitude | 47.42° |
Galactic Latitude
| 18.42°
|
Observational Data |
Observed Visual Magnitude (V) | 4.37 |
Derived Visual Magnitude | |
Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.002 |
Observed B Magnitude | 4.20 |
Observed B-V Colour | -0.170 |
Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.002 |
Observed U Magnitude | |
Observed U-B Colour | |
Observed U Magnitude or (U-B) Magnitude Uncertainty | |
Observed Photovisual Magnitude | 4.3 |
Observed Photographic Magnitude | |
Morgan Keenan (MK) Spectral Type | B2IV |
One-Dimensional Spectral Class | B3 |
Position Angle | 136 |
Year of Observation | 1934. AD |