minimum mass of 92% of the mass of Jupiter, it is a hot Jupiter, orbiting the star at a distance of only 0.04 AU. Its orbit is nearly circular, with a best fit orbital eccentricity of 0.022 ± 0.015. Planets close to their stars have high chances of transit, but photometric observations of HD 179949 ruled out this possibility. Infrared observations of HD 179949 with the Spitzer Space Telescope detected 0.14% variations in the system's brightness in phase with the orbital period of the planet, indicating large luminosity variation between the illuminated side and the dark side of the planet, implying that less than 21% of the incident stellar energy is transferred to the dark side. In 2014, infrared observations of the system with the CRIRES instrument, at the Very Large Telescope, directly detected the thermal spectrum of the planet, revealing absorption features of carbon monoxide and water vapor in its atmosphere. The radial velocity of the planet has variations of 142.8 ± 3.4 km/s due to orbital motion, which allowed the calculation of a real mass of 0.98 ± 0.04 Jupiter masses and an orbital inclination of 67.7 ± 4.3 degrees. References External links SIMBAD star entry, planet entry 179949 094645 Sagittarius (constellation) F-type main-sequence stars 7291 0749 Durchmusterung objects