HD 177830 is an evolved K0IV star with two known exoplanets .
In addition to the planetary companions it has a late-type stellar companion discovered with adaptive optics imagery .
We observed the binary star system with the PHARO near-IR camera and the Project 1640 coronagraph .
Using the Project 1640 coronagraph and integral field spectrograph we extracted a spectrum of the stellar companion .
This allowed us to determine that the spectral type of the stellar companion is a M4 \pm 1V .
We used both instruments to measure the astrometry of the binary system .
Combining these data with published data , we determined that the binary star has a likely period of approximately 800 years with a semi-major axis of 100-200 AU .
This implies that the stellar companion has had little or no impact on the dynamics of the exoplanets .
The astrometry of the system should continue to be monitored , but due to the slow nature of the system , observations can be made once every 5-10 years .