The J2000 Epoch

Highlights

• ›The reference instant of modern astronomy

Bodies, frames & concepts

• The International Celestial Reference System
• Terrestrial Time

Across celestial mechanics

• Orbital Elements
• The International Celestial Reference System
• The B1950 Epoch
• Terrestrial Time

Knowledge connections

• Associated withOrbital Elements
• Associated withThe International Celestial Reference System
• Associated withThe International Celestial Reference System
• Associated withTerrestrial Time
• Associated withThe B1950 Epoch
• Associated withTerrestrial Time
• Associated withThe Equatorial Coordinate System
• Associated withThe Fifth Fundamental Catalogue (FK5)
• Associated withJulian Date

Sources

Facts on this topic will be cited from these primary and reference sources.

• IAUInternational Astronomical Union

  Official naming, definitions, constellation boundaries, and astronomical nomenclature.