On 22 April your 1852 DR position is LAT 23°54.5'N, LONG 117°36.8'W. You observe an unidentified star bearing 259°T at an observed altitude (Ho) of 41°15.2'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?

Question

On 22 April your 1852 DR position is LAT 23&deg;54.5'N, LONG 117&deg;36.8'W. You observe an unidentified star bearing 259&deg;T at an observed altitude (Ho) of 41&deg;15.2'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?

Accepted Answer

Option D: Betelgeuse. Star identification requires determining GMT from chronometer time, computing GHA Aries, and applying assumed longitude to find LHA. Comparing calculated coordinates with observed altitude and bearing identifies Betelgeuse.

On 22 April your 1852 DR position is LAT 23&deg;54.5'N, LONG 117&deg;36.8'W. You observe an unidentified star bearing 259&deg;T at an observed altitude (Ho) of 41&deg;15.2'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?

On 22 April your 1852 DR position is LAT 23°54.5'N, LONG 117°36.8'W. You observe an unidentified star bearing 259°T at an observed altitude (Ho) of 41°15.2'. The chronometer reads 02h 54m 53s, and is 02m 51s fast. What star did you observe?