Statements (17)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:standard
|
| gptkbp:abbreviation |
ET
|
| gptkbp:basedOn |
orbital motion of Earth
|
| gptkbp:category |
gptkb:astronomy
timekeeping |
| gptkbp:definedIn |
gptkb:IAU_1952_resolution
|
| https://www.w3.org/2000/01/rdf-schema#label |
Ephemeris Time (ET)
|
| gptkbp:introduced |
gptkb:International_Astronomical_Union
|
| gptkbp:introducedIn |
1952
|
| gptkbp:precededBy |
mean solar time
|
| gptkbp:replacedBy |
gptkb:Barycentric_Dynamical_Time_(TDB)
gptkb:Terrestrial_Time_(TT) |
| gptkbp:usedBetween |
1952
1976 |
| gptkbp:usedFor |
astronomical calculations
|
| gptkbp:bfsParent |
gptkb:Terrestrial_Time_(TT)
|
| gptkbp:bfsLayer |
7
|