Binary star system in the constellation Andromeda
! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000      Equinox J2000
! style="text-align:left" | Constellation
! style="text-align:left" | Right ascension
! style="text-align:left" | Declination
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:left" | Spectral type
! style="text-align:left" | U−B 
! style="text-align:left" | B−V 
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HD 222109 is a binary star system located in the northern constellation of Andromeda. It has a combined apparent visual magnitude of 5.80, which allows it to be visible to the naked eye as a single star. The system has a combined spectral classification of B8V. It is situated at a distance of approximately 800 light years from the Solar System, and the two stars orbit each other with a period of 351.22 years. They are separated by a distance of 0.41″ and have an orbital eccentricity of 0.39. Individually, the stars have apparent magnitudes of 6.08 and 7.38, respectively.
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