Mass of the Solar System

The Sun is 99.8% of the mass of the solar system.  Jupiter is about 70% of all the mass in the solar system that is not the sun.  Ganymede, the Moon, and all the dwarf planets and moons are all less massive than Mercury, most by a lot. The total mass of the asteroid belt and all the comets is around 3e21...way less.   It's remotely possible that there's something big in the Oort cloud, but unlikely.

The lightest brown dwarfs are believed to mass abut 2.5e28 kg, roughly 13 times heavier than Jupiter.  The lightest actual stars are believed to mass about 1.5e29, about 75 times the mass of Jupiter. 

The solar system is the sun plus little stuff.  There will never be another sun in the solar system, unless it captures a passing star.


mass in kg, diameter and distance in km

Name	Mass	Diameter	Distance from Sun
Sun	1.9891e30	1.39e6	0
Mercury	3.3e23	4889	5.7e7
Venus	4.87e24	1.20e4	1.08e8
Earth	5.97e24	1.27e4	1.50e8
Mars	6.42e23	6779	2.28e8
Jupiter	1.90e27	1.40e5	7.80e8
Saturn	5.68e26	1.16e5	1.43e9
Uranus	8.68e25	5.01e4	2.87e9
Neptune	1.02e26	4.92e4	4.5e9
Planets	2.68e27