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Epoch (astronomy) and Hipparcos

Shortcuts: Differences, Similarities, Jaccard Similarity Coefficient, References.

Difference between Epoch (astronomy) and Hipparcos

Epoch (astronomy) vs. Hipparcos

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time. Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.

Similarities between Epoch (astronomy) and Hipparcos

Epoch (astronomy) and Hipparcos have 7 things in common (in Unionpedia): Aberration of light, Astrometry, Axial precession, Earth, Ecliptic, International Celestial Reference System, Proper motion.

Aberration of light

The aberration of light (also referred to as astronomical aberration, stellar aberration, or velocity aberration) is an astronomical phenomenon which produces an apparent motion of celestial objects about their true positions, dependent on the velocity of the observer.

Aberration of light and Epoch (astronomy) · Aberration of light and Hipparcos · See more »


Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies.

Astrometry and Epoch (astronomy) · Astrometry and Hipparcos · See more »

Axial precession

In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis.

Axial precession and Epoch (astronomy) · Axial precession and Hipparcos · See more »


Earth is the third planet from the Sun and the only astronomical object known to harbor life.

Earth and Epoch (astronomy) · Earth and Hipparcos · See more »


The ecliptic is the circular path on the celestial sphere that the Sun follows over the course of a year; it is the basis of the ecliptic coordinate system.

Ecliptic and Epoch (astronomy) · Ecliptic and Hipparcos · See more »

International Celestial Reference System

The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).

Epoch (astronomy) and International Celestial Reference System · Hipparcos and International Celestial Reference System · See more »

Proper motion

Proper motion is the astronomical measure of the observed changes in the apparent places of stars or other celestial objects in the sky, as seen from the center of mass of the Solar System, compared to the abstract background of the more distant stars.

Epoch (astronomy) and Proper motion · Hipparcos and Proper motion · See more »

The list above answers the following questions

Epoch (astronomy) and Hipparcos Comparison

Epoch (astronomy) has 63 relations, while Hipparcos has 142. As they have in common 7, the Jaccard index is 3.41% = 7 / (63 + 142).


This article shows the relationship between Epoch (astronomy) and Hipparcos. To access each article from which the information was extracted, please visit:

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