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Table 1
Some Besselian and Julian epochs.
| Epoch | ISO-8601 date | Julian date |
|
|
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| B1900 | 1899-12-31T19:31:26.4(ET) | 2415020.3135(ET) |
| B1950 | 1949-12-31T22:09:50.4(ET) | 2433282.4235(ET) |
| J1900 | 1899-12-31T12:00:00(ET) | 2415020.0(ET) |
| J2000 | 2000-01-01T12:00:00(TDB) | 2451545.00(TDB) |
| J2001 | 2000-12-31T18:00:00(TDB) | 2451910.25(TDB) |
| J2002 | 2002-01-01T00:00:00(TDB) | 2452275.50(TDB) |
| J2003 | 2003-01-01T06:00:00(TDB) | 2452640.75(TDB) |
| J2004 | 2004-01-01T12:00:00(TDB) | 2453006.00(TDB) |
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