LIST OF CATALOGS WITH THE PHOTOGRAPHIC ORBITS The photographical IAU MDC database is a collection of 41 partial catalogs. A brief information about each individual catalg is given below. A more detailed information about the catalogs can be found in the documentation to the photographically gained data. ----------------------------------------------------------------------- B1 to B3 - Dutch Meteor Society orbits; Betlem; 481 orbits in 3 catalogs C1 - Ceplecha small camera orbits; 103 orbits D1 to D8 - USSR small camera meteor orbits, Dushanbe stations; 636 orbits in 8 catalogs E1 - Ceplecha/European Network small camera orbits; 189 orbits E2 to E4 - European Network small camera orbits - after 1990; 180 orbits in 3 catalogs F1 - Prairie Network fireball orbits, Smithsonian Astrophysical Observatory, McCrosky, Shao, Posen; 334 orbits G1 - NASA - NMSU (New Mexico State University) orbits; 25 orbits H1 - Harvard Super Schmidt orbits: Dona Ana and Soledad, New Mexico stations, Hawkins and Southworth random sample; 313 orbits I1 and I2 - MORP (Meteorite Observation and Recovery Project) fireball orbits, Halliday, Blackwell, Griffin; 259 orbits in total J1 - Harvard Super Schmidt orbits: Dona Ana and Soledad, New Mexico stations, Jacchia and Whipple; 413 orbits K1 to K3 - USSR small camera meteor orbits, Kiev stations; 206 orbits in 3 catalogs N1, N2, and U1 - Nippon Meteor Society small camera orbits; 325 orbits in 3 catalogs O1 to O6 - USSR small camera meteor orbits, Odessa stations; 459 orbits in 6 catalogs P1 - Harvard Super Schmidt orbits: Sacramento Peak and Mayhill, New Mexico stations, Posen and McCrosky; 353 orbits R1 - Spanish meteor societes orbits; 32 orbits S1 - Harvard Super Schmidt orbits: Wallops Island stations; McCrosky and Shao; 314 orbits T1 to T3 - Nippon Meteor Society/Tokyo Meteor Network small camera orbits; 85 orbits in 3 catalogs U1 - see N1, N2, and U1 W1 - Harvard small camera orbits, Whipple; 166 orbits