Delta-T

The Delta-T end point obtains an estimated Delta-T value in seconds for the given date.

The returned values are from the following sources:

• Up to year 2004: Meeus, Astronomical Algorithms, 2nd Ed. p.79 Table 10.A.

• 2006 - 2024: source

• 2024 - 2034: source

• After 2034: we implement these expressions

For further context, see Delta T.

Return estimated delta-T for the given date

get

Authorizations

radianDriftApiKeyradiantDriftJWT

Path parameters

datestringRequired

The input date/time.

Example: 2024-10-15T22:00:00.000Z

Responses

200Success

application/json

4XX

Not Found

application/json

get

HTTPcURLJavaScriptPython

GET /delta-t/{date} HTTP/1.1
Host: api.radiantdrift.com
Accept: */*

{
  "query": {
    "name": "delta-t",
    "date": "2024-10-15T22:00:00.000Z",
    "cost": 1
  },
  "response": {
    "deltaT": 69.08631831
  }
}