How Much Declination Do Stars Need for a Luck City at Latitude 35°?

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SUMMARY

For a city located at latitude 35°, the declination of stars must be greater than 55° to ensure that the visible arc of their path is maximized, thus qualifying the city as a "luck city." The concept hinges on the relationship between latitude and declination, where a higher declination results in a longer visible arc. The specific star does not impact this determination; rather, the focus is solely on the declination value.

PREREQUISITES
  • Understanding of celestial coordinates, specifically declination and latitude.
  • Basic knowledge of astronomy and star visibility.
  • Familiarity with the concept of the celestial sphere.
  • Awareness of how Earth's rotation affects star visibility.
NEXT STEPS
  • Research the relationship between latitude and star declination in astronomy.
  • Explore the concept of the celestial sphere and its implications for star visibility.
  • Learn about the longest visible arcs of stars at various latitudes.
  • Investigate historical beliefs regarding "luck cities" and their astronomical foundations.
USEFUL FOR

Astronomy enthusiasts, educators, and students studying celestial mechanics, as well as individuals interested in the cultural significance of star visibility in urban planning.

walter1998
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People in the past thought that a city which the length of the visible arc of a star's path in that city is longer, that city is the luck city; Now, for a city with a latitude of 35° how much should be the star's declination to be the luck city?
 
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Longer than what?
Which star?
Is that homework?
 
mfb said:
Longer than what?
Which star?
Is that homework?
longer means the longest arc available. and the star is not important, just the declination is the thing.
 

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