It is not necessarily any size, as 0.123 solar masses is a measure of mass rather than size. The size of an object of a given mass can vary depending on the object's density.
Algol (El Ghoul or demon) has a radius of 2.3 Solar masses.
A black hole of 100 solar masses would have an event horizon 185.3 miles in radius.
The black hole at the centre of the Andromeda galaxy is estimated to be 140 million Solar-masses.
A supermassive black hole is a black hole with a very large mass, millions to billions times the mass of the sun. The supermassive black hole in our galaxy is about 4 million times the mass of the sun.
No planet is that big. Jupiter, the largest planet in the solar system, is about a tenth the diameter of the sun.
A mass of a star can be anything between 0.1 solar masses to 100 solar masses.
Alpha Centauri has a mass of 1.1 solar masses.
It is 100 times the mass of our own sun
Algol (El Ghoul or demon) has a radius of 2.3 Solar masses.
A black hole of 100 solar masses would have an event horizon 185.3 miles in radius.
The black hole at the centre of the Andromeda galaxy is estimated to be 140 million Solar-masses.
The Sun diameter is 1,390,000 kilometers and it is the largest object in the solar system. Amazingly its mass corresponds to 99.8% of the total mass in the solar system.
Most stars are red dwarfs which range from half the mass of the Sun, down to about 0.075 solar masses.
A supermassive black hole is a black hole with a very large mass, millions to billions times the mass of the sun. The supermassive black hole in our galaxy is about 4 million times the mass of the sun.
The Sun is about 4.6 billion years - as old as our Solar System in general. The Sun has a diameter of almost 1,400,000 km - 109 times the diameter of Earth.
If you mean in the solar system, then the answer is the sun. Jupiter and Saturn are also some big masses in the solar system. In the galaxy, the largest object is probably the black hole in the center.
The diameter of the planet Jupiter is 88,846 miles. It is over 3 times as big as the planet Earth and it is the largest planet in our solar system.