On 22 March your 1834 DR position is LAT 26°13.5'S, LONG 108°36.5'W. You observe an unidentified star bearing 294°T at an observed altitude (Ho) of 33°02.7'. 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 294&deg;T at an observed altitude (Ho) of 33&deg;02.7'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. What star did you observe?

Accepted Answer

Option B: Menkar. Convert chronometer time to UTC to find GHA Aries. Calculate LHA Aries and the star's LHA using the DR longitude. Comparing the observed altitude and bearing against the Sight Reduction Tables (Pub. 229) for the calculated LHA and declination confirms the star is Menkar, following standard celestial reduction.

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 294&deg;T at an observed altitude (Ho) of 33&deg;02.7'. 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 294°T at an observed altitude (Ho) of 33°02.7'. The chronometer reads 01h 32m 37s, and is 01m 50s slow. What star did you observe?