Mira's Heliocentric Julian Date Calculation
Heliocentric Julian Date ("HJD") is a standard method of time measurement referenced to the Sun's position which corrects for the difference in light travel time between the object and the location of the Earth in its orbit, and the light travel time from the object to the fixed Sun. This removes the bias attributable to the object's direction in space, the observing date, and time of day. HJD is used in several areas of astronomy that involve precision timing. The Mira platforms targeted at astronomy and space sciences include this feature in the photometry measurement module.