On 12 June your 1845 DR position is LAT 21°47'N, LONG 46°52'W when you observe a faint unidentifiable star through a break in the clouds. The star bears 031°T at a sextant altitude (hs) of 70°10.3'. The index error is 0.5' on the arc, and the height of eye is 45 feet. The chronometer reads 09h 43m 27s, and the chronometer error is 1m 46s slow. What star did you observe?

Question

Accepted Answer

Option A: Cor Caroli. Apply index error, dip, and refraction to hs to find Ho. Determine GMT and LHA. Using sight reduction tables, solve for the intercept and azimuth. The resulting celestial coordinates and bearing match Cor Caroli, confirming the identification based on the provided DR position and time of observation.