Time Conversion

Equation of Time

Compute the Equation of Time (sundial correction) in minutes for a given JD.

get/time/equation-of-time

Request

  • Base URL: https://api.openephemeris.com
  • URL: https://api.openephemeris.com/time/equation-of-time
  • Auth: one of:
    • HTTP bearer
    • API key in header X-OpenEphemeris-API-Key
    • API key in header X-API-Key
    • API key in header X-Service-Key

Query parameters

jdnumber double required

Julian Day (Terrestrial Time)

Headers

authorizationstring nullable
X-API-Keystring nullable
X-OpenEphemeris-API-Keystring nullable
apikeystring nullable

Response

Successful Response

apparent_solar_timenumber required

The computed Apparent Solar Time (decimal hours)

equation_of_time_minutesnumber required

The Equation of Time value in minutes

julian_daynumber double required

The Julian Day (TT) used for calculation

mean_solar_timenumber required

The computed Mean Solar Time (decimal hours)

Changes

No recorded changes to this operation across all 1 revision of this API.