One problem would be that an inflatable would not have such a regular schedule. There are tables of when and where it will appear. Another is that it moves very
I saw the International Space Station (ISS) once. It came right on schedule. It seemed to appear very suddenly, scute half way across the sky very quickly and then disappear.
The sudden appearance and disappearance was explained to me as being caused by the angle the sunlight light hit the ISS. The curvature of the earth limits the time that the space station is illuminated by the sun. There is a temporal window near dusk when it is illuminated. So in addition to moving, it seems to vary in brightness very quickly.
The variation of illumination was the most startling. I didn't check the math on the illumination. An inflatable would have to be really high to vary in brightness like that. It would also have to be propelled to go so fast. Think of a zeppelin with fast spinning propellers. Of course, I didn't hear anything. The ISS is sort of quiet. I like the airplane explanation a lot better.
There could be a high altitude jet that has a certain path all the time. However, it would have to be going along the same trajectory without stopping every day all year so it appear to be in orbit. Maybe a series of jets committed by some government agency to move in a way that mimics the orbit of the nonexistent ISS.
The ISS appeared to me very much like some UFO sightings where the vehicle disappeared into hyperspace. So maybe there is no ISS. Maybe what observers call the ISS is really an extraterrestrial vehicle with faster than light drive.
I wonder what moon landing conspiracy believers and UFO conspiracy believers say to one another?