Barycentric Time Calculator
Calculate Barycentric Dynamical Time (TDB), Barycentric Coordinate Time (TCB), and Geocentric Coordinate Time (TCG) for precise astronomical calculations.
Time Scales
UTC: Sat, 31 Jan 2026 00:08:39 GMT
TT: Sat, 31 Jan 2026 00:09:48 TT
TDB: Sat, 31 Jan 2026 00:09:48 TDB
TCB: Sat, 31 Jan 2026 00:10:12 TCB
TCG: Sat, 31 Jan 2026 00:09:49 TCG
Time Offsets
TDB - TT
0.7752 ms
TCB - TDB
24.015898 s
TCG - TT
1.079469 s
JD (TT)
2461071.50680769
JD (TDB)
2461071.50680769
Julian Century (T)
0.2608215416
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.