>>3193330 lb

http://www.esd.whs.mil/Portals/54/Documents/FOID/Reading%20Room/Special_Collections/13-M-46380001.pdf

https://www.hq.nasa.gov/office/pao/History/TM-3487/notes7.htm

Skylab

http://www.aoml.noaa.gov/general/lib/TM/TR_ERL_AOML_7-2.pdf

http://capitalastronomers.org/SD_year/1966/StarDust_1966_10.pdf