On 22 July your 1759 DR position is LAT 24°50.2' S, LONG 005°16.0' E. You observe an unidentified star bearing 203°T at an observed altitude (Ho) of 28°12.2'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?

Question

On 22 July your 1759 DR position is LAT 24&deg;50.2' S, LONG 005&deg;16.0' E. You observe an unidentified star bearing 203&deg;T at an observed altitude (Ho) of 28&deg;12.2'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?

Accepted Answer

Option A: Miaplacidus. Sight reduction for an unidentified star calculates computed coordinates from GMT and DR position, matching SHA and declination against standard navigational stars to identify Miaplacidus.

On 22 July your 1759 DR position is LAT 24&deg;50.2' S, LONG 005&deg;16.0' E. You observe an unidentified star bearing 203&deg;T at an observed altitude (Ho) of 28&deg;12.2'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?

On 22 July your 1759 DR position is LAT 24°50.2' S, LONG 005°16.0' E. You observe an unidentified star bearing 203°T at an observed altitude (Ho) of 28°12.2'. The chronometer reads 06h 01m 31s, and is 02m 15s fast. What star did you observe?