On 2 October your 1845 DR position is LAT 28°09.2'S, LONG 167°48.1'E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 11°37.6' bearing 066°T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe?

Question

On 2 October your 1845 DR position is LAT 28&deg;09.2'S, LONG 167&deg;48.1'E. You observe a faint star through a hole in the clouds at a sextant altitude (hs) of 11&deg;37.6' bearing 066&deg;T. The index error is 1.3' off the arc, and the height of eye is 42 feet. The chronometer reads 07h 46m 19s and is 0m 51s fast. What star did you observe?

Accepted Answer

Option D: Algenib. Correct the sextant altitude for index error, dip, and refraction. Calculate UTC, GHA Aries, and SHA. Compute LHA and Declination. The coordinates correspond to Algenib, confirming the identification based on the observed bearing of 066°T and altitude of 11°37.6' using standard Nautical Almanac data.