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LST

LST

9.9
The time that shows the Earth's rotation relative to the stars
  • symbol
  • Specialized
translation icon : hora sideral local
  • Accurate LST readings are essential for aligning telescopes with celestial objects.

Examples

  • Before starting the telescope, the astronomer checked the current LST on the control panel.

  • The observatory calculated LST to determine the best time for viewing distant galaxies.

  • The LST is crucial for astronomers.

  • What is the current LST for this location?

  • The observatory calculated LST to determine the best time for viewing distant galaxies.

  • Before starting the telescope, the astronomer checked the current LST on the control panel.

  • Accurate LST readings are essential for aligning telescopes with celestial objects.

Synonyms

sidereal time
vsLST
  • Specialized
9.9

Time kept by the position of stars to track Earth's rotation

is the same system but fixed to one place's longitude for that location

Surface Forms

LST main

Morphology

LST = L + S + T

This is an initialism (acronym) formed from initials; the letters are not English morphemes and the meaning cannot be derived from them.

Etymology

LST stands for Local Sidereal Time; 'sidereal' means 'related to the stars', so this LST is like a clock that follows the stars instead of the sun. That is why astronomers use LST to know which stars are above a place at a certain time.