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Lunar ephemeris and selenographic coordinates of the earth and sun for 1971 and 1972Ephemeris data are presented for each month of 1971 and 1972 to provide a time history of lunar coordinates and related geometric information. A NASA Manned Spacecraft Center modification of the Jet Propulsion Laboratory ephemeris tape was used to calculate and plot coordinates of the earth, moon, and sun. The ephemeris is referenced to the mean vernal equinox at the nearest beginning of a Besselian year. Therefore, the reference equinox changes from one year to the next between 30 June and 1 July. The apparent discontinuity in the data is not noticeable in the graphical presentation, but can be observed in the digital output. The mean equator of epoch is used in all cases. The computer program used to compute and plot the ephemeris data is described.
Document ID
19720016246
Acquisition Source
Legacy CDMS
Document Type
Special Publication (SP)
Authors
Hartung, A. D. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
September 2, 2013
Publication Date
January 1, 1972
Subject Category
Space Sciences
Report/Patent Number
NASA-SP-3057
Accession Number
72N23896
Funding Number(s)
PROJECT: RTOP 924-22-20-00-72
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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