JPL Horizons On-Line Ephemeris System (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "JPL Horizons On-Line Ephemeris System" in English language version.

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forumastronautico.it

Alan B. Chamberlin (2006-02-28). "Frequently Asked Questions (FAQ): What's the exact value of..." JPL Solar System Dynamics. Retrieved 2011-01-20.
Jet Propulsion Laboratory (August 28, 2015). "HORIZONS User Manual". "Long term ephemeridies" section. Retrieved January 10, 2016.
Horizons output. "Barycentric Osculating Orbital Elements for Comet C/1980 E1 (Bowell)". Solution using the Solar System Barycenter. Ephemeris Type:Elements and Center:@0 (To be outside planetary region, inbound epoch 1950 and outbound epoch 2050)