Iridium sats are 700kg each, GEOsats are also less than that.
The upcoming James Webb Space Telescope's launch/payload mass is 6 200 kg.
The Falcon Heavy can push 1 400 000 kg, and 16 800 kg of that can be payload. To Mars.
I don't know whether weight was added (probably) or removed (very likely the stock batteries were removed) in preparation for its launch.
Update: According to Wikipedia, launch weight was 1,200 kg
Ref: https://en.wikipedia.org/wiki/Elon_Musk's_Tesla_Roadster
https://en.wikipedia.org/wiki/List_of_satellites_in_geosynch...
Echostar 1: 3,287 kg
Americom 7: 1,983 kg
Yamal 300k: 1,870 kg
Ciel-2: 5,561 kg
Horizons-1: 4,060 kg
EchoStar X: 4,333 kg
Amos 2: 1,370 kg
NSS-7: 4,692 kg
Star One B4: 2,495 kg
Iridium sats are 700kg each, GEOsats are also less than that.
The upcoming James Webb Space Telescope's launch/payload mass is 6 200 kg.
The Falcon Heavy can push 1 400 000 kg, and 16 800 kg of that can be payload. To Mars.