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[ascl:2102.001]
spinOS: SPectroscopic and INterferometric Orbital Solution finder

Fabry, Matthias; Hawcroft, Calum; Mahy, Laurent; Marchant, Pablo; Le Bouquin, Jean-Baptiste; Sana, Hugues

spinOS calculates binary orbital elements. Given a set of radial velocity measurements of a spectroscopic binary and/or relative position measurement of an astrometric binary, spinOS fits an orbital model by minimizing a chi squared metric. These routines are neatly packaged in a graphical user interface, developed using tkinter, facilitating use. Minimization is achieved by default using a Levenberg-Marquardt algorithm from lmfit [ascl:1606.014]. A Markov Chain Monte Carlo option is available to sample the posterior probability distribution in order to estimate errors on the orbital elements.