U
- UBV — Photoelectric Catalogue, magnitude and color of stars in UBV (Blanco et al. 1968)
- UBV M — UBV Photoelectric Photometry Catalogue (Mermilliod 1987)
- UCAC — USNO CCD Astrograph Catalog (UCAC1, UCAC2 and UCAC3)
- UGC — Uppsala General Catalogue
- USNO — US Naval Observatory
- USNO-A1.0 — US Naval Observatory, A1.0 catalogue
- USNO-A2.0 — US Naval Observatory, A2.0 catalogue
- USNO-B1.0 — US Naval Observatory, B1.0 catalogue
- uvby98 — uvbyβ photoelectric photometric catalogue, by B. Hauck, M. Mermilliod, Astron. Astrophys., Suppl. Ser., 129, 431-433 (1998)
Read more about this topic: List Of Astronomical Catalogues