| Identifier |
Value |
Meaning |
| J1900 |
2415020.0 |
standard epoch J1900
|
| J1950 |
2433282.5 |
standard epoch J1950 |
| J2000 |
2451544.0 |
standard epoch J2000 |
| J2050 |
2469807.5 |
standard epoch J2050 |
| J2100 |
2488069.0 |
standard epoch J2100 |
| B1850 |
2396758.203 |
beginning of Besselian year 1850 |
| B1900 |
2415020.313 |
beginning of Besselian year 1900 |
| B1950 |
2433282.423 |
beginning of Besselian year 1950 |
| B1975 |
2442413.478 |
beginning of Besselian year 1975 |
| B2000 |
2451544.533 |
beginning of Besselian year 2000 |
| B2025 |
2460675.588 |
beginning of Besselian year 2025 |
| B2050 |
2469806.643 |
beginning of Besselian year 2050 |
| B2100 |
2488068.753 |
beginning of Besselian year 2100 |