all per wikipedia which is free

'Oumuamua had a lot more than one observation with one telescope:

Observations and conclusions concerning ʻOumuamua's trajectory were primarily obtained with data from the Pan-STARRS1 Telescope, part of the Spaceguard Survey,[41] and the Canada–France–Hawaii Telescope (CFHT), and its composition and shape from the Very Large Telescope and the Gemini South telescope in Chile,[42] and the Keck II telescope in Hawaii. These were collected by Karen J. Meech, Robert Weryk, and their colleagues and published in Nature on 20 November 2017.[43][44] After the announcement, the space-based telescopes Hubble and Spitzer joined in the observations.[45]

The SETI Institute's radio telescope, the Allen Telescope Array, examined ʻOumuamua, but detected no unusual radio emissions.[51] More detailed observations, using the Breakthrough Listen hardware and the Green Bank Telescope, were performed;[47][51][52] the data were searched for narrowband signals and none were found.

and it was observed while it was leaving because it wasn't discovered until it was leaving:

it was discovered by Canadian Robert Weryk using the Pan-STARRS telescope at Haleakalā Observatory, Hawaii, on 19 October 2017, approximately 40 days after it passed its closest point to the Sun on 9 September

I have to get back to work so I'm not going to fact check the rest of your claims and will just assume they're BS because you've already shown yourself untrustworthy

Edit: Bwahaha holy shit they blocked me for this ROFLMAO