Spanish original · English

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

Cuando la declinación de un astro con declinación N es mayor que 90º menos la latitud de un observador del hemisferio norte:When a north-declination body’s declination exceeds 90º minus a northern observer’s latitude:

Show the answer

Correct answer: c) It is always above the horizon

Why it is correct

That body is circumpolar: it circles the pole without setting. Its hour angle does reach 180º, at lower transit.

Why the others are not

  • a) It does, at lower transit.
  • b) Only if dec = latitude.
  • d) Option a is false.

How to work it out in the exam

  1. Dec > 90º − lat: circumpolar.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.