- Pritchett (double stars) PrO - Perth Observatory, Australia (double stars) Prz - Przbyllok (double stars) Ps - Francis G. Pease (planetary nebulae) (for example: Pease 1 in the globular cluster Messier 15, Pegasus) PSR - Pulsating Source of Radio (pulsars) PTFO — Palomar Transient Factory Ptt - Pettit (double stars) Pu - Purgathofer (planetary nebulae) PuWe - Purgathofer-Weinberger (planetary nebulae) Pz - Piazzi (double stars) Q Q (?) - (for example: galaxy Q 6188 at 0:48.6 / -12:44 in Cetus) (mentioned on charts 261 / 262 in Uranometria 2000.0 Volume 2, 1987 edition) (according to Wolfgang Steinicke and Richard Jakiel of the book Galaxies and How to Observe Them, this galaxy (Q 6188) is also catalogued as Mrk 960 and PGC 2845) QES - QATAR Exoplanet Survey QSO — Revised and Updated Catalog of Quasi-stellar Objects QZM - (for example: QZM 2 at galactic coordinates 78.12 / +3.63) (J2000 - 20:14:26 / +41°13'28") (QZM 2 = Froebrich 116, = SUH 151) R R - Radcliffe Observatory (RMC - Radcliffe Observatory Magellanic Clouds Catalogue) R - Rose (Rose Catalogue of Southern Clusters of Galaxies) R - H.C.Russell (double stars) Raab (open star clusters) RAFGL - Revised Air Force Geophysical Laboratory (four color infrared sky survey) Raymond - (telescopic asterisms) RBC - Revised Bologna Catalogue (for example: globular cluster RBC EXT8 in Messier 31; the Andromeda galaxy) RC — Reference Catalogue RC2 — Reference Catalogue, 2nd edition RC3 — Reference Catalogue, 3rd edition RCW — Rodgers-Campbell-Whiteoak A catalogue of Hα-emission regions in the southern Milky Way RECONS — Research Consortium on Nearby Stars Reiland - (for example: open star cluster Reiland 1 at 23:04:45 / +60°04'40") Reinmuth - (galaxies) (for example: Reinmuth 80 in Virgo) (NGC 4517A) Renou (telescopic asterisms) Reyle-Robin - (open star clusters, I.R.) Richaud - Jean Richaud, 1633-93 (double stars) Riddle - (open star clusters / telescopic asterisms) Rmk - C.L.C.Rumker (double stars) RMM - (for example: open star cluster RMM 1 at 12:12:20 / -63°15'31") RNGC — Revised New General Catalogue Ro - Curt Roslund (open star clusters) Roberts - (protoplanetary nebulae) Roe - Edward Drake Roe, 1859-1929 (double stars) Roman-Lopes - (open star clusters, I.R.) Ross — Ross Catalogue of New Proper Motion Stars ROT — Catalogue of Rotational Velocities of the Stars RSA — Revised Shapley-Ames Catalogue RSGC - Red Super Giant Cluster (for example: RSGC 3 at 18:45:20 / -3°24'43") RST — Catalogue of