What Does HJD Stand For?

HJD stands for Heliocentric Julian Day

Heliocentric Julian Day (HJD) is a time measurement used in astronomy that expresses time relative to the position of the Sun. It is defined as the number of days since a fixed starting point, specifically the Julian Day corresponding to the time when the Sun is at the center of the solar system. HJD is particularly useful for accurately calculating the positions of celestial objects in relation to the Sun, facilitating precise observations and analyses in astrophysics and planetary science.

Other Meanings for HJD