Definition of Julian epoch. Meaning of Julian epoch. Synonyms of Julian epoch

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Definition of Julian epoch

Julian epoch
Julian Jul"ian (?; 277) a. [L. Julianus, fr. Julius. Cf. July, Gillian.] Relating to, or derived from, Julius C[ae]sar. Julian calendar, the calendar as adjusted by Julius C[ae]sar, in which the year was made to consist of 365 days, each fourth year having 366 days. Julian epoch, the epoch of the commencement of the Julian calendar, or 46 b. c. Julian period, a chronological period of 7,980 years, combining the solar, lunar, and indiction cycles (28 x 19 x 15 = 7,980), being reckoned from the year 4713 B. C., when the first years of these several cycles would coincide, so that if any year of the period be divided by 28, 19, or 15, the remainder will be the year of the corresponding cycle. The Julian period was proposed by Scaliger, to remove or avoid ambiguities in chronological dates, and was so named because composed of Julian years. Julian year, the year of 365 days, 6 hours, adopted in the Julian calendar, and in use until superseded by the Gregorian year, as established in the reformed or Gregorian calendar.

Meaning of Julian epoch from wikipedia

- In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity. It is useful for the...
- and periodization, an epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference...
- equinoxes and epochs have been su****ded by Julian equinoxes and epochs. The current standard equinox and epoch is J2000.0, which is a Julian epoch. Besselian...
- epoch to which they pertain must be specified. A new standard epoch is chosen about every 50 years. The standard epoch in use today is Julian epoch J2000...
- incorrect. The Julian day number (JDN) shares the epoch of the Julian period, but counts days instead of years. Specifically, Julian day number 0 is...
- In computing, an epoch is a fixed date and time used as a reference from which a computer measures system time. Most computer systems determine time as...
- currently used standard epoch is J2000.0, which is January 1, 2000 at 12:00 TT. The prefix "J" indicates that it is a Julian epoch. Prior to J2000.0, astronomers...
- 00:00:00 UTC on 1 January 1970 excluding leap seconds, this is called the Unix epoch. For example, at midnight on January 1 2010, Unix time was 1262304000. Unix...
- currently used standard epoch is J2000.0, which is January 1, 2000 at 12:00 TT. The prefix "J" indicates that it is a Julian epoch. Prior to J2000.0, astronomers...
- The Julian calendar is a solar calendar of 365 days in every year with an additional leap day every fourth year (without exception). The Julian calendar...