Sun's longitude

Sun's longitude

A measure of the Earth's position around its orbit and more specifically the point in this orbit at which a meteor shower has its maximum intensity. It is the angle between the Earth–Sun line when the Sun is at the vernal equinox and the Earth–Sun line at any other time, measured in the direction of the Earth's motion.
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References in periodicals archive ?
The ecliptic is also shown, marked off with the Sun's longitude and the zodiacal signs.
In the 18th century the Astronomical Almanac wasn't available to Maharaja Sawai Jai Singh II, who ruled part of India from 1699 to 1743, so this Hindu prince built stairways to the stars that enabled him to find the Sun's longitude quite accurately.
In any case, Jai Singh would have been prepared to measure the Sun's longitude by climbing the steps on one of 12 stairways to the stars at Jaipur.