Groombridge 1618

Groombridge 1618 is a star located in the northern constellation Ursa Major. With an apparent visual magnitude of +6.6, it is just at the limit of what can be seen with the naked eye under good conditions. This star is relatively close to Earth, lying about 15.89 light-years away. Groombridge 1618 is a main sequence star, meaning it is in the stable phase of its life, fusing hydrogen into helium. It has a spectral type of K7.5 Ve and is slightly smaller than our Sun, with only about 67% of the Sun's mass. Its proximity and characteristics make it an interesting object of study for astronomers.

Properties

This star was first listed in 1838 by Stephen Groombridge. It moves quickly across the sky, which suggested it was close to Earth. Scientists later measured its distance by watching how it appeared to shift against the background stars.

Groombridge 1618 is a cooler, smaller star than our Sun. It has less mass and gives off less energy, glowing with an orange color. Occasionally, its brightness increases slightly, similar to some other small stars.

Search for planets

Scientists have looked for planets around Groombridge 1618 using special telescopes like the Infrared Space Observatory and the Herschel Space Observatory. They found some hints of tiny bits of dust far from the star, but no planets have been confirmed yet.

Some old observations suggested there might be a planet about four times the size of Jupiter orbiting the star, but this wasn’t proven. If such a planet exists, it might be in a place where liquid water could exist, which scientists call the habitable zone. More recent checks with the MMT telescope didn’t find any planets either.