2MASS J09373487+2931409

2MASS J09373487+2931409, also known as 2MASSI J0937347+293142 or simply 2MASS 0937+2931, is a special kind of object called a brown dwarf. Brown dwarfs are like stars, but they are not big enough to shine brightly like our Sun. Instead, they give off a faint glow that can be seen with special telescopes.

This brown dwarf belongs to a group called spectral class T6, which means it is very cool compared to most stars. It is located in the constellation Leo, which is shaped like a lion and can be seen in the night sky.

Scientists figured out that 2MASS J09373487+2931409 is about 19.96 light-years from Earth. That means if light from this object were to travel to our planet, it would take almost 20 years to get here! Studying objects like this helps us learn more about the different kinds of stars and objects in space.

Discovery

2MASS 0937+2931 was discovered in 2002 using data from the Two Micron All-Sky Survey (2MASS). Scientists used special cameras on large telescopes like the Palomar and Cerro Tololo Inter-American Observatory (CTIO) to study objects in the sky. This discovery helped scientists learn more about brown dwarfs, which are objects similar to stars but not quite big enough to shine on their own.

Distance

The distance to 2MASS 0937+2931 is known through a method called trigonometric parallax. The most precise measurement, made in 2009, shows it is about 19.96 light-years from Earth. An earlier, less precise measurement from 2004 gave a similar result.

Properties

2MASS 0937+2931 is a special kind of star-like object called a brown dwarf. Its spectrum looks unusual, suggesting it has fewer metals in its atmosphere or higher pressure on its surface. Scientists estimate its temperature to be about 800 Kelvin. According to the Research Consortium On Nearby Stars, this brown dwarf has a mass of about 0.03 times that of the Sun, or 0.03 solar masses. In 2014, no changes in its brightness were observed.