On 22 March your 1834 DR position is LAT 26°13.5'S, LONG 108°36.5'W. You observe an unidentified star bearing 315°T at an observed altitude (Ho) of 66°01.2'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. What star did you observe?

Question

On 22 March your 1834 DR position is LAT 26&deg;13.5'S, LONG 108&deg;36.5'W. You observe an unidentified star bearing 315&deg;T at an observed altitude (Ho) of 66&deg;01.2'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. What star did you observe?

Accepted Answer

Option B: Rigel. Calculate GMT by adjusting the chronometer reading for error. Determine the LHA of Aries and the star's SHA and Declination. Using the observed altitude and bearing, solve the navigational triangle to find the star's coordinates. The resulting data aligns precisely with the celestial position and magnitude of Rigel.

On 22 March your 1834 DR position is LAT 26&deg;13.5'S, LONG 108&deg;36.5'W. You observe an unidentified star bearing 315&deg;T at an observed altitude (Ho) of 66&deg;01.2'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. What star did you observe?

On 22 March your 1834 DR position is LAT 26°13.5'S, LONG 108°36.5'W. You observe an unidentified star bearing 315°T at an observed altitude (Ho) of 66°01.2'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. What star did you observe?