SKF 1311 (Omega Serpentis) is a binary system located 273 light-years away from the Sun. While some sources suggest it is a single star, according to the Washington Double Star Catalog (WDS), it is unequivocally a physical binary star system. The primary component is of spectral class G8III, with a mass of 1.2 solar masses and a radius 10 times larger than that of the Sun. The companion is expected to be a yellow-orange main-sequence star of spectral class K0V. In the case of Omega Serpentis, it is likely a Common Proper Motion (CPM) pair. In 2013, an exoplanet was discovered around the primary component—a gas giant with a mass approximately 540 times that of Earth (1.7 times the mass of Jupiter), orbiting its parent star at a distance of 1.1 astronomical units every 277 days.

100mm - SKF 1311 is located just under 4° to the east-southeast (JJV) of the brightest star in the constellation Serpens—Unukalhai. It is a relatively easy target for small telescopes, although there is a significant brightness difference between its components, approximately 5 magnitudes. The 75" separation is sufficiently large for easy observation of the companion. I observed the primary component as yellow and the companion as grey with a faint hint of blue.