2013a

2013a is a rare and distance planetary-mass object discovered in 2018. It is a member of the Upper Scorpius subgroup of the Scorpius-Centaurus association, which is a group of nearby young stars and related objects.

2013a was detected using the Magellan Telescopes at the Las Campanas Observatory in Chile. The object was initially identified as a planetary-mass object, but subsequent observations suggested that it may be a binary or multiple system.

The mass of 2013a is estimated to be between 8 and 15 times that of Jupiter, making it one of the most massive directly imaged planets in the solar neighborhood. Despite its large size, 2013a is thought to have a highly eccentric orbit, which takes it far away from its parent star.

Further observations of 2013a have revealed that it does not exhibit any significant signs of atmospheric activity, and its light curve variations are consistent with a chaotic system star surrounded by a hierarchical system. The exact nature of 2013a remains uncertain, and continued study is necessary to fully understand its characteristics and behavior.

Observations of 2013a have also led to a reappraisal of the Upper Scorpius subgroup and its member objects. The discovery of 2013a highlights the potential for further additions to the already diverse array of planetary-mass and stellar objects in the region. Further study of 2013a and its counterparts is essential to gain insights into the early stages of planetary and stellar formation in our solar neighborhood.