Museums with diagonal star tables in their collections (not all are on public display - check before you make a journey!):

Egyptian Museum, Cairo, Egypt: currently (2018) no website

British Museum, London, UK: http://www.britishmuseum.org/

Egyptian Museum, Turin, Italy: http://www.museoegizio.it/

Roemer- und Pelizaeus-Museum, Hildesheim, Germany: http://www.rpmuseum.de/

Castle Museum Hohentübingen, Tübingen, Germany: https://www.unimuseum.uni-tuebingen.de/de/museum-im-schloss.html

Musée du Louvre, Paris, France: http://www.louvre.fr/

Los Angeles County Museum of Art (LACMA): http://www.lacma.org/

 

You can see several astronomical representations in the Valley of the Kings here:

Theban Mapping Project: http://www.thebanmappingproject.com/

 

Societies:

The Egypt Exploration Society: http://www.ees.ac.uk/

The Society for the Study of Egyptian Antiquities: https://sseatoronto.wordpress.com/

The American Research Centre in Egypt: http://www.arce.org/

The International Association of Egyptologists: http://iae-egyptology.org/