Kenneth Harold Olsen 20-02-1930 15-02-2010 10-04-1970 Fellow Ole Theodor Olsen 14-08-1838 16-01-1925 11-02-1881 Fellow Adm. Sir Erasmus Ommanney 22-05-1814 21-12-1904 14-01-1853 Fellow Rev. William Lake Onslow 10-05-1820 28-08-1877 13-06-1851 Fellow Jan Hendrik Oort 28-04-1900 05-11-1992 14-11-1930 Fellow, later Associate Ernst Julius Öpik 23-10-1893 10-09-1985 08-04-1949 Fellow Theodor Ritter von Oppolzer 26-10-1841 26-12-1886 09-01-1874 Associate Count Barnaba Oriani 17-07-1752 12-11-1832 13-04-1821 Associate Francis Henry Samuel Orpen 22-10-1824 22-02-1893 11-06-1880 Fellow R-Adm. Henry Charles Otter 26-03-1876 11-11-1842 Fellow William Ottway 14-10-1848 01-01-1915 12-01-1906 Fellow Jean Abraham Chrétien Oudemans 16-12-1827 14-12-1906 09-11-1883 Associate Michael William Ovenden 21-05-1926 15-03-1987 13-07-1945 Fellow Rev. Arthur Edwin Brisco Owen 03-07-1925 12-01-1906 Fellow V-Adm. William Fitzwilliam Owen 17-09-1774 03-11-1857 11-01-1822 Fellow Capt. Ernest William Owens 14-08-1915 08-05-1903 Fellow William Henry Owston 15-10-1875 15-12-1950 10-04-1931 Fellow Rev. Daniel Joseph Kelly OConnell 25-07-1896 14-10-1982 11-01-1935 Fellow Rev. Edward Dominic OConnor 26-11-1874 23-02-1954 09-01-1914 Fellow Rev. William J. OLeary 19-03-1869 16-04-1939 14-01-1938 Fellow Bohdan Paczyński 08-02-1940 19-04-2007 12-12-1975 Fellow, later Associate Col. Frederick Page 08-04-1834 09-05-1828 Fellow Julius Page 06-08-1883 13-06-1845 Fellow William Irving Page 19-11-1840 06-09-1903 08-01-1886 Fellow Bernard Pagel 04-01-1930 14-07-2007 14-01-1955 Fellow Rev. Harold Pain 24-03-1873 02-09-1951 11-04-1919 Fellow Henry Proctor Palmer 16-09-1926 28-04-1990 13-12-1957 Fellow M-Gen. Henry Spencer Palmer 30-04-1838 10-03-1893 09-01-1874 Fellow William Henry Palmer 07-11-1800 09-10-1864 14-04-1848 Fellow John Stefanos Paraskevopoulos 20-06-1889 15-03-1951 14-01-1921 Fellow Earl George Parker (Macclesfield) 24-02-1755 20-03-1842 13-04-1821 Fellow Samuel Hickling Parkes 08-04-1817 12-08-1896 13-01-1882 Fellow John Adelbert Parkhurst 24-09-1861 01-03-1925 14-04-1905 Fellow Rev. Stephen Parkinson 01-08-1823 02-01-1889 11-03-1853 Fellow William Alfred Parr 02-04-1936 11-04-1913 Fellow Sir Charles Algernon Parsons 12-06-1854 11-02-1931 12-01-1917 Fellow Earl William Parsons (Rosse) 17-06-1800 31-10-1867 11-06-1824 Fellow Earl Laurence Parsons (Rosse) 17-11-1840 30-08-1908 13-12-1867 Fellow Jay Pasachoff 01-07-1943 20-11-2022 14-01-1977 Fellow Gen. Sir Charles William Pasley 08-09-1780 19-04-1861 13-06-1834 Fellow Hugh Lee Pattinson 25-12-1796 11-11-1858 09-01-1852 Fellow Joseph Lade Pawsey 14-05-1908 30-11-1962 09-02-1951 Fellow Cecilia Helena Payne-Gaposchkin 10-05-1900 07-12-1979 08-12-1922 Fellow, later Associate Rev. George Peacock 09-04-1791 08-11-1858 29-02-1820 Fellow Horace Pearce 21-11-1838 19-02-1900 14-01-1887 Fellow Sir Robert Pearce 29-09-1922 12-01-1877 Fellow Reginald William Blake Pearse 19-03-1905 13-04-1989 12-05-1933 Fellow George Pearson 07-08-1928 13-02-1925 Fellow Rev. James Pearson 08-04-1886 10-04-1874 Fellow Rev. William Pearson 23-04-1767 06-09-1847 08-02-1820 Fellow Francis Gladheim Pease 14-01-1881 07-02-1938 09-06-1922 Fellow Bt R-A Samuel John Brooke Pechell 01-09-1785 03-11-1849 13-05-1831 Fellow Sir William Peck 03-01-1862 08-03-1925 13-03-1885 Fellow Olaf Pedersen 08-04-1920 03-12-1997 12-03-1976 Fellow, later Associate Robert Peebles 21-04-1864 04-04-1928 09-11-1923 Fellow Sir Cuthbert Edgar Peek 30-01-1855 08-07-1901 11-01-1884 Fellow Rev. John Newton Peill 14-12-1808 12-06-1879 12-01-1849 Fellow Benjamin Peirce 04-04-1809 06-10-1880 12-04-1850 Associate Sir John Pender 10-09-1816 07-07-1896 08-06-1883 Fellow Charles Pendlebury 05-07-1854 18-08-1941 10-01-1879 Fellow Francis Cranmer Penrose 29-10-1817 17-02-1903 08-02-1867 Fellow Michael Victor Penston 17-02-1943 23-12-1990 10-02-1967 Fellow John Louis Perdrix 30-06-1926 26-06-2005 11-12-1959 Fellow Dudley Stewart Perfect 26-07-1896 05-12-1964 09-02-1945 Fellow Julien Péridier 19-04-1967 07-04-1909 Fellow Henry Perigal 01-04-1801 06-06-1898 08-02-1850 Fellow Rev. Thomas Perkins 21-03-1907 12-06-1885 Fellow Charles Dillon Perrine 28-07-1867 21-06-1951 10-06-1904 Associate Charles William Dyson Perrins 25-05-1864 29-01-1958 08-02-1895 Fellow James Dyson Perrins 27-11-1823 26-02-1887 13-05-1870 Fellow Rev. Stephen Joseph Perry 26-08-1833 27-12-1889 09-04-1869 Fellow Christian August Friedrich Peters 07-09-1806 08-05-1880 12-05-1848 Associate Christian Heinrich Friedrich Peters 19-09-1813 18-07-1890 10-01-1879 Associate Adolphus Cornelius Petersen 23-07-1804 03-02-1854 12-05-1848 Associate Sir William Petersen 29-05-1856 12-06-1925 14-02-1913 Fellow Louis Hayes Petit 08-11-1774 13-11-1849 13-04-1821 Fellow James George Petrie 22-09-1907 10-05-1889 Fellow James Pettit 25-11-1850 08-04-1825 Fellow Lieut. John East Hunter Peyton 28-03-1841 13-01-1916 14-01-1870 Fellow Rev. Edmund Sixtus Phillips 12-08-1933 14-01-1910 Fellow Montagu Austin Phillips 14-11-1879 11-01-1939 14-04-1905 Fellow Rev. Theodore Evelyn Reece Phillips 28-03-1868 13-05-1942 12-05-1899 Fellow Guiseppe Piazzi 16-07-1746 22-07-1826 09-03-1821 Associate David Bedell Pickering 18-01-1873 13-06-1946 13-04-1928 Fellow Edward Charles Pickering 19-07-1846 03-02-1919 10-06-1881 Associate William Henry Pickering 15-02-1858 16-01-1938 10-06-1910 Associate John (Jack) Hobart Piddington 06-11-1910 16-07-1997 12-12-1952 Fellow William Montgomery Pierson 04-11-1904 09-01-1891 Fellow George Granado Graham Foster Pigott 16-05-1835 14-05-1878 09-06-1865 Fellow Oluf Andreas Löwold Pihl 05-12-1822 01-07-1895 09-11-1860 Fellow Sydney Royston Pike 06-05-1903 22-11-1928 10-02-1928 Fellow Solomon Borisovich Pikelner 06-02-1921 19-11-1975 12-02-1971 Associate Colin Pillinger 09-05-1947 08-05-2014 14-01-1983 Fellow Stefan Leon Piotrowski 11-04-1910 17-01-1985 13-12-1957 Fellow Baron Henry Pirbright (de Worms) 20-10-1840 09-01-1903 13-12-1861 Fellow Paris Marie Pismis de Recillas 30-01-1911 01-08-1999 12-11-1965 Fellow Stavros Plakidis 22-05-1893 30-01-1991 08-02-1929 Fellow Baron Giovanni Antonio Amedeo Plana 08-11-1781 20-01-1864 14-05-1824 Associate Emile Plantamour 14-05-1815 07-09-1882 12-04-1844 Associate Harry Hemley Plaskett 05-07-1893 26-01-1980 09-05-1919 Fellow 
