Barycentric Time Calculator
Calculate Barycentric Dynamical Time (TDB), Barycentric Coordinate Time (TCB), and Geocentric Coordinate Time (TCG) for precise astronomical calculations.
Time Scales
UTC: Tue, 07 Apr 2026 15:18:41 GMT
TT: Tue, 07 Apr 2026 15:19:50 TT
TDB: Tue, 07 Apr 2026 15:19:50 TDB
TCB: Tue, 07 Apr 2026 15:20:14 TCB
TCG: Tue, 07 Apr 2026 15:19:51 TCG
Time Offsets
TDB - TT
1.6698 ms
TCB - TDB
24.105161 s
TCG - TT
1.083481 s
JD (TT)
2461138.13877528
JD (TDB)
2461138.13877530
Julian Century (T)
0.2626458255
About Barycentric Time Scales
TDB (Barycentric Dynamical Time): Used for solar system ephemerides. Differs from TT by periodic terms due to Earth's motion.
TCB (Barycentric Coordinate Time): The coordinate time in a reference frame at the solar system barycenter. Runs faster than TT due to gravitational time dilation.
TCG (Geocentric Coordinate Time): The coordinate time for a reference frame at Earth's center. Used for geocentric ephemerides.