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Luke Dones; Paul R Weissman; Harold F Levison; Martin J Duncan (2004). "Oort Cloud Formation and Dynamics"(PDF). In Michel C. Festou; H. Uwe Keller; Harold A. Weaver (eds.). Comets II. University of Arizona Press. pp. 153–173. Archived from the original on 2017-08-24. Retrieved 2008-03-22.
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Licandro, Javier; de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl; de Leon, Julia; Serra-Ricart, Miquel; Cabrera-Lavers, Antonio (28 May 2019). "Spectroscopic and dynamical properties of comet C/2018 F4, likely a true average former member of the Oort cloud". Astronomy and Astrophysics. 625: A133 (6 pages). arXiv:1903.10838. Bibcode:2019A&A...625A.133L. doi:10.1051/0004-6361/201834902. S2CID85517040.
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Licandro, Javier; de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl; de Leon, Julia; Serra-Ricart, Miquel; Cabrera-Lavers, Antonio (28 May 2019). "Spectroscopic and dynamical properties of comet C/2018 F4, likely a true average former member of the Oort cloud". Astronomy and Astrophysics. 625: A133 (6 pages). arXiv:1903.10838. Bibcode:2019A&A...625A.133L. doi:10.1051/0004-6361/201834902. S2CID85517040.
Davies, John K.; McBride, Neil; Green, Simon F.; Mottola, Stefano; et al. (April 1998). "The Lightcurve and Colors of Unusual Minor Planet 1996 PW". Icarus. 132 (2): 418–430. Bibcode:1998Icar..132..418D. doi:10.1006/icar.1998.5888.
Licandro, Javier; de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl; de Leon, Julia; Serra-Ricart, Miquel; Cabrera-Lavers, Antonio (28 May 2019). "Spectroscopic and dynamical properties of comet C/2018 F4, likely a true average former member of the Oort cloud". Astronomy and Astrophysics. 625: A133 (6 pages). arXiv:1903.10838. Bibcode:2019A&A...625A.133L. doi:10.1051/0004-6361/201834902. S2CID85517040.
"New Horizons Salutes Voyager". New Horizons. August 17, 2006. Archived from the original on November 13, 2014. Retrieved November 3, 2009. Voyager 1 is escaping the solar system at 17 kilometers per second.
Horizons output. "Barycentric Osculating Orbital Elements for Comet C/1999 F1 (Catalina)". Archived from the original on 2021-06-02. Retrieved 2021-06-01. Solution using the Solar System Barycenter. Ephemeris Type:Elements and Center:@0 (To be outside planetary region, inbound epoch 1950 and outbound epoch 2050. For epoch 1950-Jan-01 orbit period is "PR= 1.6E+09 / 365.25 days" = ~4.3 million years)
Licandro, Javier; de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl; de Leon, Julia; Serra-Ricart, Miquel; Cabrera-Lavers, Antonio (28 May 2019). "Spectroscopic and dynamical properties of comet C/2018 F4, likely a true average former member of the Oort cloud". Astronomy and Astrophysics. 625: A133 (6 pages). arXiv:1903.10838. Bibcode:2019A&A...625A.133L. doi:10.1051/0004-6361/201834902. S2CID85517040.
Luke Dones; Paul R Weissman; Harold F Levison; Martin J Duncan (2004). "Oort Cloud Formation and Dynamics"(PDF). In Michel C. Festou; H. Uwe Keller; Harold A. Weaver (eds.). Comets II. University of Arizona Press. pp. 153–173. Archived from the original on 2017-08-24. Retrieved 2008-03-22.
web.archive.org
Williams, Matt (August 10, 2015). "What is the Oort Cloud?". Archived from the original on January 23, 2018. Retrieved May 21, 2021.
Horizons output. "Barycentric Osculating Orbital Elements for Comet C/1999 F1 (Catalina)". Archived from the original on 2021-06-02. Retrieved 2021-06-01. Solution using the Solar System Barycenter. Ephemeris Type:Elements and Center:@0 (To be outside planetary region, inbound epoch 1950 and outbound epoch 2050. For epoch 1950-Jan-01 orbit period is "PR= 1.6E+09 / 365.25 days" = ~4.3 million years)
Luke Dones; Paul R Weissman; Harold F Levison; Martin J Duncan (2004). "Oort Cloud Formation and Dynamics"(PDF). In Michel C. Festou; H. Uwe Keller; Harold A. Weaver (eds.). Comets II. University of Arizona Press. pp. 153–173. Archived from the original on 2017-08-24. Retrieved 2008-03-22.
"New Horizons Salutes Voyager". New Horizons. August 17, 2006. Archived from the original on November 13, 2014. Retrieved November 3, 2009. Voyager 1 is escaping the solar system at 17 kilometers per second.