description 138 Tolosa Overview
138 Tolosa is an S-type main-belt asteroid discovered by French astronomer Henri Joseph Anastase Perrotin on 19 May 1874. It was discovered at the Toulouse Observatory and takes its name from Tolosa, the Latin and Occitan name associated with the French city of Toulouse. Its classification places it among the stony asteroids of the inner main-belt region, making it an object of study in asteroid taxonomy and small-body dynamics.
help 138 Tolosa FAQ
Who discovered asteroid 138 Tolosa and when?
It was discovered by French astronomer Henri Joseph Anastase Perrotin on 19 May 1874 at the Toulouse Observatory in France. Perrotin discovered several asteroids in the 1870s and later went on to direct the Nice Observatory.
Why is the asteroid named Tolosa?
Tolosa is the Latin and Occitan name associated with the French city of Toulouse, so the asteroid honors the city of its discovery. It follows the 19th-century custom of naming asteroids after classical or local place names.
What type of asteroid is 138 Tolosa?
It is an S-type asteroid, the stony, silicaceous class that is common in the inner main belt. Like other main-belt asteroids, it orbits the Sun in the region between Mars and Jupiter.
How big is 138 Tolosa?
Published estimates put its diameter on the order of roughly 45 to 60 kilometres, depending on the measurement method used. That makes it a fairly typical mid-sized main-belt object rather than a dwarf-planet-scale body.
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