Solar Culmination at the Equator Monument
Around 21–23 March and 21–23 September, the sun can sit very near overhead at midday. At culmination, the shadow of an upright object seems to gather directly beneath it.
Dates and observation times depend on astronomical calculations and weather. Treat these windows as a cue to check local schedules, not as a fixed appointment.
What is culmination?
Solar culmination occurs when the sun reaches its highest point in the sky at noon. At the equator, this happens when the sun is almost directly overhead.
When does it happen?
Generally around 21–23 March and 21–23 September each year. The exact time depends on the astronomical calculation for that year.
Why do shadows disappear?
When the sun is almost directly overhead, the shadow of an upright object shrinks to a point directly beneath it, so it seems to vanish.
Observation tips
Check local listings for the expected date and time, arrive early, and hope for clear weather since conditions affect the view.
Frequently asked questions
01When does the culmination happen?+
Usually around 21–23 March and 21–23 September each year, depending on the astronomical calculation for that year.
02Why do shadows seem to disappear?+
Because the sun is almost directly overhead, the shadow of an upright object shrinks to a point beneath it and appears to vanish.
03Can the culmination time be predicted exactly?+
Dates and times depend on astronomical calculations and weather, so it is better to check local listings than treat it as a fixed time.