some latitude/longitude hardcoded in sites.json not accurate

[taichiuyama]

Description

For the coordinates of the Mauna Kea observatories, I found inconsistencies between sites.json and IRTF reports.
https://irtfweb.ifa.hawaii.edu/observing/telescopeCoordinates.php
At least the IRTF one is consistent with Subaru; https://subarutelescope.org/Observing/Telescope/Parameters/

Additional context

I need accurate latitude and longitude to calculate precession-corrected parameters.

[hamogu]

Hi @taichiuyama thanks for checking. The data for the sites.json is contributed by users like you. It would be great if you could open a pull request to improve whatever you found.
Originally, this database was meant for observation planning to get the time of sunset/sunrise etc and no great precision was needed. It's only later that people started using it outside of the original use case. So, we would very much welcome a pull request to update information as needed.

[taichiuyama]

thank you @hamogu for clarifying the data format, I thought the astropy databases were accurate.
will check other coordinates and open a pull request later.