the titan 23b space launch vehicle was a three-stage liquid fueled booster, designed to provide a small-to-medium weight class capability. it was able to lift approximately into a polar low-earth circular orbit. the first stage consisted of a ground ignited aerojet lr-87 liquid propellant rocket, while the second stage consisted of an lr91 liquid propellant rocket. the third stage was an agena d xlr81-ba-9 liquid propellant rocket.