S Ori 70

S Ori 70 ( known as an S Ori J053810.1 - 023 626, S Orionis 70 or 2MASS J0538101 - 023 626 ) is an interstellar object in the constellation Orion at the coordinates α = 5h 38m 10s, δ = -2 ° 36 ' 26 ". The nature of S Ori 70 is still unclear and the subject of current research; it could be either a young planetary mass object or a brown dwarf.

S Ori 70 was discovered in 2002 by Zapatero Osorio and others in an investigation of the sigma Orionis cluster, a young open cluster, which is located about 440 parsecs ( 1,400 light years). It is not clear whether the object is part of this cluster. If one presupposes membership in the Sigma Orionis clusters, it is clear from the photometric and spectroscopic properties of the object with the help of models, a mass of well below 13 Jupiter masses, so it would be an object of planetary mass. If the object is not, however, part of the cluster, so it is a brown dwarf of spectral type T6. If the first hypothesis is correct, the result of model calculation gives a rough estimate of the mass of the celestial body of about 3 Jupiter masses and a radius of 1.6 Jupiter radii.

The position of S Ori 70 moves due to its own movement, each corresponding to 0.011 arcsec.