STF 2272 (70 Ophiuchi) is a binary star system located 16 light-years away from the Sun. The primary component A is an orange main-sequence star of spectral class K0V with a mass of 0.9 solar masses. The companion B is also an orange main-sequence star of spectral class K4V with a mass of 0.7 solar masses. The orbital period of components A and B is 88 years, with a highly elliptical orbit ranging from 11 AU to 35 AU. Based on the stars' motion, there is a hypothesis about the existence of planets orbiting the primary component. However, no specific discovery has been confirmed to date.

100mm - STF 2272 (70 Ophiuchi) is located approximately 6° southeast of the bright star Beta Ophiuchi. The components can be distinguished at moderate magnification, but adding a bit more magnification is preferable. At 100x, I was surprised by the pronounced color contrast of the pair, with the primary component being a vivid yellow and the companion distinctly orange. It is a very beautiful and attractive pair.