The latest ephemeris can be generated by using:
https://minorplanetcenter.net/iau/MPEph/MPEph.html
or
https://ssd.jpl.nasa.gov/horizons/app.html#/
Photometry – the ARPS section is collating very good light curves to determine its period of rotation
https://groups.io/g/ARPS/message/939
Astrometry – observers are submitting astrometry and photometry to the MPC
https://minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=152637
Occultations – 4 occultations of stars have been observed (in USA, Poland and Spain) providing high-quality astrometry of the asteroid
https://ukoccultations.groups.io/g/main/message/5005
Goldstone radar is tracking it
https://echo.jpl.nasa.gov/asteroids/1997nc1.2026.goldstone.planning.html
Timelapse recordings will be nice souvenirs of its flyby. Tonight (Jun 26) its sky motion is 43 arcsec / minute and at mag 10 is a fine sight moving against the rich star fields.
In contrast to living in the digital world, view it in your eyepiece and experience the solar system in motion. Catch it now before it dives into southern skies on Sunday.
Alex.