ephemerisSecondDefinedAs
P138450
predicate
Indicates that the duration of one ephemeris second is formally defined in terms of a specific astronomical or dynamical time standard.
Sample triples (1)
| Subject | Object |
|---|---|
| Ephemeris Time | 1/31,556,925.9747 of the tropical year for 1900 January 0 at 12h ephemeris time ⓘ |