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A worldwide resource for fundamental astronomical data, the Astronomical Almanac includes contributions from astronomical experts, as well as a wide variety of technical and general astronomical information. This includes:
This is a joint publication with the United States Naval Observatory.
This publication has replaced (Blue Cover) the joint publication of the U.S. Nautical Almanac Office, United States Naval Observatory (USNO) in the United States, Her Majesty's Nautical Almanac Office (HMNAO), and the United Kingdom Hydrographic Office (UKHO).
Long before it became possible to write and run programs on a personal computer, e.g., computer programs that model the motions of bodies in our solar system, there was the annual Astronomical Almanac.
For me personally, it became possible back in 1984 to write such programs on my own IBM PC/XT desktop computer. But I had been purchasing the Astronomical Almanac annually before that.
My particular interest lately is in modeling the motions of asteroids that enter cislunar space and impact Earth. The Almanac's annual ephemeris tables of the major and minor planets provide a handy source of test data for my programs.
While I do also access the JPL Horizons website to obtain such test data, using the authoritative data and explanations in the printed pages of the annual Astronomical Almanac has been an ongoing activity that I continue to enjoy.
Roger L. Mansfield
Arrived on time.
The Astronomical Almanac, 2025 Edition
Long before it became possible to write and run programs on a personal computer, e.g., computer programs that model the motions of bodies in our solar system, there was the annual Astronomical Almanac.
For me personally, it became possible back in 1984 to write such programs on my own IBM PC/XT desktop computer. But I had been purchasing the Astronomical Almanac annually before that.
My particular interest lately is in modeling the motions of asteroids that enter cislunar space and impact Earth. The Almanac's annual ephemeris tables of the major and minor planets provide a handy source of test data for my programs.
While I do also access the JPL Horizons website to obtain such test data, using the authoritative data and explanations in the printed pages of the annual Astronomical Almanac has been an ongoing activity that I continue to enjoy.
Roger L. Mansfield
Arrived on time.
The Astronomical Almanac, 2025 Edition
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