Spanish original · English

Hover or tap underlined Spanish terms to see their translation and exam tip.

Respecto al angulo sidereo, señale la respuesta CORRECTA:Concerning Sidereal Hour Angle, select the CORRECT answer:

Show the answer

Correct answer: a) It is the angular distance measured westward along the celestial equator from Aries to the body’s hour circle.

Why it is correct

Sidereal Hour Angle (SHA / AS) is the angular distance measured westward (0° to 360°) along the celestial equator from the First Point of Aries (♈) to the body’s hour circle.

Why the others are not

  • b) The angle between the ecliptic and the celestial equator is the obliquity of the ecliptic (≈ 23° 27′).
  • c) Measured westward from the observer’s upper meridian to the body is the Local Hour Angle (LHA).
  • d) The interval between two passages of the Sun through Aries is the tropical year.

How to work it out in the exam

  1. Sidereal Hour Angle (SHA): angular distance westward along the celestial equator from Aries to the body’s hour circle.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.