Here I give references to the description and discussion sections. References to orbital data for specific objects are at cite.html
[1] P.A. Jackson, Space Surveillance Satellite Catalog Maintenance, AIAA Paper 1999-1339.
[2] P. W. Schumacher, Jr, Prospects for idImproving the space catalog, AIAA Paper 1996-4290.
[3] F. R. Hoots and R. L. Roehrich, SPACETRACK REPORT No. 3; US Air Force Aerospace Defense Command, Colorado
Springs, Colorado., 1980.
[4] J. McDowell, How Integral Was Lost, ESA news article, 15 Dec 2015.
https://www.cosmos.esa.int/web/integral/how-integral-was-lost
[5] United Nations, Convention on Registration of Objects Launched into Outer Space, 6 June 1975,
023 UNTS 15 (entered into force 15 September 1976).
[6] G. Williams, Distant Artificial Satellites Observation (DASO) circular.
https://minorplanetcenter.net/iau/DASO/DASO.html
[7] W. Gray, Project Pluto, https://www.projectpluto.com
[8] J. Giorgini, HORIZONS, https://ssd.jpl.nasa.gov/?horizons
[9] K. Jorgensen, A. Rivkin, R. Binzel, R. WHitely, C. Hergenrother, P. Chodas, S. Chesley and F. Vilas, Bull. Am.Astron.Soc 35, 981 (2003).
[10] COSPAR, The COSPAR Panel on Planetary Protection Role, Structure and Activities, Space Research Today 205, 14. (2019).
[11] H. Rein, D. Tamayo, D. Vorkouhlicky, The random walk of cars and their collision probabilities with planets, Arxiv.org paper 1802.04718.
[12] L. Grush, Why stowaway creatures on the Moon confound international space law,
https://www.theverge.com, 16 Aug 2019.
[13] H. Hiller, 1966, Table of space vehicles launched in 1958-65, RAE Tech Rept. 66103.
[14] J. McDowell, Acta Astronautica 151, 668 (2018).
[15] J. McDowell,
https://planet4589.org/space/lvdb/sdb/Orgs; also McDowell, 2020 in preparation.
[16] G.W. Hill, Researches in the Lunar Theory, Am. J. Math, 1, 5 (1878).
[17] H. Hiller and J.A. Pilkington, 1973, Table of Space Vehicles Launched During the Years 1958-1972, RAE Tech. Rept. TR 73006 (Royal Aircraft Est., Farnborough).
[18] J.A. Pilkington, 1976, Table of Space Vehicles 1973-1976, RAE Tech Memo Space 242, (Royal Aircraft Est., Farnborough).
[19] H. Hiller, A.N. Winterbottom, J.A. Pilkington, and G.E. Perry, 1987, The RAE Table Of Space Vehicles 1958-1986, (Royal Aircraft Est., Farnborough).
[20] A.N. Winterbottom and G.E. Perry, The DRA Table of Space Vehicles 1958-1991, Defense Research Agency, Farnborough, UK, 1993.
[21] G. Falworth, 1969, Objects on the Moon - 1, Spaceflight 11, 384.
[22] G. Falworth, 1970. Objects in Heliocentric Orbit - 1, Spaceflight 12, 92.
[23] G. Falworth, 1970. Objects in Selenocentric Orbit - 1, Spaceflight 12, 143.
[24] G. Falworth, 1971. Objects in Heliocentric Orbit - 2, Spaceflight 13, 298.
[25] G. Falworth, 1972, Objects on the Moon - 2, Spaceflight 14, 145.
[26] G. Falworth, 1973, Objects in Selenocentric Orbit - 2, JBIS 26, 493.
[27] A. Siddiqi, 2002, Deep Space Chronicle, Monog. in Aerospace History No. 24, NASA SP-2002-4524