# Gauss publishes Theoria motus corporum coelestium

Date: 1809

## The fact

In 1809 [Gauss](/people/carl-friedrich-gauss) published Theoria motus corporum coelestium in sectionibus conicis solem ambientium, the Latin treatise that wrote out orbit determination, including the least-squares practice he had used on Ceres. He wrote the methods; computers in other observatories could now copy them. It is not a navy commission. The row stores one treatise.

## Context

After Ceres and Pallas, Europe wanted a teachable orbit shop-manual. Theoria motus is that manual: observations in, elements out, with an error practice attached. Do not merge with 1801. Do not merge with 1823. Do not treat later ‘Gaussian elimination’ classroom slang as this colophon without a documented 1809 use of that name. A NASA ephemeris is not this book. Jérôme’s Westphalia and a household in mourning (Johanna died in 1809) are biographical weather, not extra instruments. A book that still left some of the 1801 numerical tricks only partly unpacked is a limit, not a reason to drop the dated treatise. Ceres remains the 1801 demonstration; this Latin title is the shop-manual others could copy without writing to Brunswick.

Confidence is stated on the impact path, not hidden in adjectives. Theoria motus is not the 1801 Ceres night and not a later spacecraft. Mixed effects of Gauss publishes Theoria motus corporum coelestium are separate paths.

## Evidence and sources

Göttingen’s digitised Gauss corpus includes Theoria motus. Britannica independently lists the 1809 astronomical treatise among his major works. Official: https://gdz.sub.uni-goettingen.de/. Independent: https://www.britannica.com/biography/Carl-Friedrich-Gauss. The records establish 1809 publication. They do not establish a unique later orbit-software coefficient, or a NASA act. A contradictory first-edition year would change the row.

Official or archival record: Göttingen Digitisation Centre — Gauss prints and papers (https://gdz.sub.uni-goettingen.de/; Niedersächsische Staats- und Universitätsbibliothek Göttingen).

## Significance

Improving data path: a copyable reduction method. High confidence on 1809. Modest-to-medium weight. Ceres 1801 remains the demonstration; this book is the public write-up. Legendre’s 1805 least-squares memoir is a rival print, not erased here. Later error-curve mythology is not this Latin title.

The attached driver is [personal-data-protection](/drivers/personal-data-protection). The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

## What is established and what is not

Established: Theoria motus was published in 1809 as Gauss’s orbit treatise. Not established: that it is the 1801 recovery, or that a modern Kalman filter is this book. A showing of a different first year would change the row.

Shared responsibility is part of Gauss publishes Theoria motus corporum coelestium. Naming Carl Friedrich Gauss does not delete co-authors, institutions, or later transmitters. The lag from 1809-01-01 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

If a number is not in the two records named above, it is not supplied here.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

## People

- Carl Friedrich Gauss: https://factrail.ai/people/carl-friedrich-gauss

## Drivers

- Personal-Data Protection: https://factrail.ai/drivers/personal-data-protection

## Sources

- https://www.britannica.com/biography/Carl-Friedrich-Gauss
- https://gdz.sub.uni-goettingen.de/

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/gs-theoria-motus-1809