Now the 'meteor' was actually a silicon based alien named Jarvaxx whose race looked like meteors in their natural form.
Jarvaxx had been a fast food short order cook aboard aboard one of the Mark 40 InterGalactic liners that do the freighting and passenger transport runs between Sirius XII and
Andromeda A
and Earth/Sol just happened to be nearby that route.
Jarvaxx,like other silicate life forms had a natural ability to shapeshift
and in his case he /she/it liked to play the 'humanoid' at the alien parties aboard the Mark 40 class liner.
Being a silicate alien Jarvaxx's notion of a humanoid was something along the lines of a gollum,a huge lump of clay that wouldn't have impressed Joseph at all as a 'human'
However it had allowed Jarvaxx to entertain the other aliens at the party and it paid for extras.
Till a alien grey who'd had a traumatic experience on Earth in 1947 at a place called
Roswell freaked out at the sight of Jarvaxx the 'humanoid' and complained to Jarvaxx's boss
in the liner's multispecies fast food joint.
The Boss,a tentacled bug eyed gal had suggested Jarvaxx aught to spend a year on Earth,which the Mark 40 liner was passing soon
and come back aboard and get his/her/its job
back the next time the ship was passing through the neighbourhood of Sol.
And so Jarvaxx had come to Earh and hitch hike aboard Joseph the Human for a while
imparting his races shapeshifting ability to Joseph while they were merged.
Not that Joseph Kein knew that.