Unity

 1998-069F

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Boeing/Huntsville makes Node 1, the first docking node for ISS. Later Nodes will be built by Alenia. Node 1 was named Unity in 1998. Unity is 5.2m long and 4.4m in diameter. The CBM is 2.1m in diameter.

Note 1 has four stowage bays.

Per the press kit, Unity/PMA1/2 launch mass was about 11600 kg. If each PMA is 1160 kg, then Unity is 9280 kg. Other data gives a mass of 9946 kg, which may represent data after outfitting. It is not clear which figures include the mass of equipment added during the STS-88 EVAs.

Per the STS data summaries, deployed mass for the mission was 12152 kg, with 152 kg for returned (presumably FGB) cargo. Accounting for 128 kg in the subsatellites, that leaves 12024 kg for the deployed mass of Unity/PMAs, or 9704 kg for Unity alone. I will adopt the latter. If this includes about 190 kg of EVA-added hardware then the mass drops to 9514 kg. We can add 234 kg of internally transferred cargo to make recover the 9280 kg estimate for Unity alone.