Giclas - Henry L. Giclas (double stars) Gl / GJ — Gliese–Jahreiß catalogue or Gliese–Jahreiß catalogue GJJC - Gillett-Jacoby-Joyce-Cohen (planetary nebulae) Gli - J.M.Gilliss (double stars) GLIMPSE - (together with Mercer in the list of 10978 star clusters) Glp - S. de Glasenapp (double stars) GM - Gyulbudaghian-Maghakian (planetary nebulae) Gol - H.Goldschmidt (double stars) GOS — Galactic O Star Catalogue GOSSS — Galactic O-Star Spectroscopic Survey Goyal - A.N.Goyal (double stars) Graham (for example: open star cluster Graham 1 at 10:56:32 / -63:01:04) Gr - Grant (double stars) Grasdalen (open star clusters) GR - Gibson Reaves (for example: Gibson Reaves 8 (GR 8) (galaxy) in Virgo) (Gibson Reaves, 1923-2005) GRB - Gamma Ray Burst Grindlay (globular star clusters) (for example: Grindlay 1 in Scorpius, at 17:32.0 / -33°50') (source: The Deep Sky Field Guide To Uranometria 2000.0, Cragin-Lucyk-Rappaport) (and also Sky Catalogue 2000.0, Volume 2) GRO - Gamma Ray Observatory (NASA - Compton) Groombridge (Stephen Groombridge, 1755-1832) GSC — Guide Star Catalog GSC2 / GSC II — Guide Star Catalog II GSPC — Guide Star Photometric Catalog GSPC2 — Guide Star Photometric Catalog, 2nd Gsh - J.Glaisher (double stars) GΣ - G.Struve (double stars) Gtb - K.Gottlieb (double stars) Gui - J.Guillaume (double stars) Gum - Gum catalog of emission nebulae H h - John Herschel (double stars) H - Haro (planetary nebulae) H - Harvard (open star clusters) H - William Herschel (double stars) HA - ? (for example: galaxy HA 85 in Telescopium, see chart 26 in Wil Tirion's Sky-Atlas 2000.0) (however, chart 435 in Uranometria 2000.0, Volume 2, 1987 edition, shows this object as ESO 183-G30) Haf - Haffner (open star clusters) Hall - Asaph Hall (double stars) HAT - Hungarian Automated Telescope (search for extrasolar planets) HaTr - Hartl-Tritton (planetary nebulae) Haufen - (for example: Haufen A in Cetus, at 1h 08.9m / -15° 25' (2000.0), which is, according to Sky Catalogue 2000.0, Volume 2, the same as Abell 151) Hav/Moffat - Havlen-Moffat (open star clusters) Hb - Hubble (planetary nebulae) HC - Howell-Crisp (planetary nebulae) HCG — Hickson Compact Group HCWils - H.C.Wilson (double stars) HD - Henry Draper Catalogue HDE — Henry Draper Extension HDEC — Henry Draper Extension Charts HdO - Harvard Observatory USA, and stations elsewhere (double stars) HDW - Hartl-Dengel-Weinberger (planetary nebulae) Hdz - Harvard Zone Catalogues (double stars) HE — Hamburg/ESO Survey He - Henize (planetary nebulae) Hen —