19 articles for "Local"

Time reckoned by the Apparent Sun and its apparent rate of motion around the Earth. This is the time as measured by a sundial. Local Apparent Noon occurs when the Sun crosses the observer's meridian. Not much used in modern times. Occasionally, historical times are found which are expressed in "Sundial Time", and it becomes necessary to convert such measurements into Local Civil Time. Local Apparent Time (LAT) can be determined from Local Civil Time (LCT) and the Equation of Time.

See also:
♦ Equation of Time ♦ Local Civil Time

Civil Time as measured on the observer's meridian. Local Civil Time (LCT) has replaced the now obsolete term Local Mean Time (LMT). In demonstrating the calculation of Sidereal Time, older astrological textbooks taught the unnecessary calculation of LCT, and required the student to make two "10-second" corrections. Modern methods have eliminated such wasted efforts.

See also:
♦ Sidereal Time Calculation ♦ Sidereal Time ♦ Meridian ♦ Local Mean Time

The time maintained by an accurately set and operating watch or clock for a particular time zone location on the Earth. LCT is always set for the standard meridian of the time zone.

See also:
♦ Time

Our own galaxy is a member of a cluster of about two dozen members known as the Local Group. Most of the members are dwarf elliptical or irregular galaxies, but there are at least two spiral galaxies other than the Milky Way.

See also:
♦ Galaxy ♦ Milky Way

The angular distance from the observer's meridian to the hour meridian of a body, measured westward, or counter clockwise, along the Celestial Equator. It is normally expressed in time-units as hours (h), minutes (m), and seconds (s).

See also:
♦ Angular Distance ♦ Meridian ♦ Celestial Equator

An arc, measured westward on the Celestial Equator, between the Local Meridian and the Hour Circle of a Body.

See also:
♦ Angular Distance ♦ Meridian ♦ Celestial Equator

The Local Hour Angle (LHA) of the Vernal Point. The term LHA-Aries finds application in nautical navigation, where it is common practice the express LHA-Aries in degrees (°), minutes ('), and seconds (") of arc. Identical to the Local Sidereal Time (LST).

See also:
♦ Angular Distance ♦ Meridian ♦ Celestial Equator

Obsolete term.

See also:
♦ Local Civil Time

Obsolete term.

See also:
♦ Local Civil Time ♦ Meridian

Sun time — the actual time at a location within a time zone. Noon, local time, occurs when the Sun crosses the meridian of the location.

See also:
♦ Local Civil Time ♦ Meridian

Clock or mean Solar time as calculated for the local meridian. This differs from "Local Clock Time" by the distance in time, East or West, that this local meridian is from that standard meridian that the LCT is calculated from. The time at noon as measured when the transiting Sun crosses the local meridian. This is the type of time that was usually kept by each jurisdiction before the year 1883 when centralized time keeping was established.

See also:
♦ Local Civil Time ♦ Meridian

Based upon the moment when the mean Sun crosses the Midheaven of the place. Local Mean Time was almost universally used prior to the adoption of Standard Time on Nov. 18, 1883, and in some communities it continued to be used for a long time thereafter. v. Time.

See also:
♦ Time ♦ Local Civil Time ♦ Meridian

The great circle passing through the poles and a particular location on Earth.

See also:
♦ Great Circle

The meridian associated with a particular place on Earth.

See also:
♦ Great Circle

The angular distance, measured eastward along the Celestial Equator, from the Vernal Point to the local meridian. LST is normally expressed in time-units as hours (h), minutes (m) , and seconds (s), and, frequently, written using colons as: LST=12:45:52.13. The value of LST is identical with that of RAMC, except that the latter is usually writen in arc-units.

See also:
♦ Angular Distance ♦ Celestial Equator ♦ Vernal Point ♦ Meridian ♦ RAMC (Right Ascension of Medium Coeli)

The expression of RAMC in time units. RAMC is the arc of distance measured counter-clockwise along the Celestial Equator from the Aries Point to the local meridian. LST is the measure of how far, at any moment, the Point of Aries is from the observers meridian. This distance or arc, expressed in time units, is LST. At a local meridian this value changes each moment of the day with the rotation of the Earth. This is also the value from which the MC is calculated. The MC and the LST astrologically refer to the same area but the MC is expressed in zodiacal sign and degree units in the Ecliptic system while LST is expressed in time units measured along the Celestial Equator. See also: "RAMC".

See also:
♦ Angular Distance ♦ Celestial Equator ♦ Vernal Point ♦ Meridian ♦ RAMC (Right Ascension of Medium Coeli)

Concept pioneered by Michael Erlewine.

See also:
♦ Local Space Coordinates ♦ Relocation ♦ Michael Erlewine

A chart system that correlates terrestrial maps with celestial maps. It was first developed by Michael Erlewine in the early 1970s and has since become very popular in both North America and Europe. It uses horizonal coordinates (azimuth and altitude) and is of greatest interest as an AstroLocality technique.

In Local Space charts, sign positions are read as directional positions on the compass (Aries: east, Cancer: north, Libra: west, Capricorn: south), with each planet thus defining a line that points in a particular geographical direction. For example, people who live on your Venus line (that is to say, who live in the direction of Venus from where you live) may prove to be close friends or cooperative partners.

See also:
♦ Azimuth ♦ Altitude ♦ Michael Erlewine

An implementation of the horizon coordinates (Azimuth, Altitude) linking terrestrial mapping with celestial maps. First developed by Michael Erlewine in the early 1970s, Local Space has become very poplular both in the U.S. and the continent. It is of most interest as a relocation technique.

See also:
♦ Horizontal Coordinates ♦ Michael Erlewine ♦ Azimuth ♦ Altitude ♦ Relocation