On 22 February your 1857 ZT DR position is LAT 23°46.0'S, LONG 93°16.5'E. You observe an unidentified star bearing 159°T, at an observed altitude (Ho) of 34°30.0'. The chronometer reads 01h 00m 35s and is 03m 25s fast. What star did you observe?

Question

On 22 February your 1857 ZT DR position is LAT 23&deg;46.0'S, LONG 93&deg;16.5'E. You observe an unidentified star bearing 159&deg;T, at an observed altitude (Ho) of 34&deg;30.0'. The chronometer reads 01h 00m 35s and is 03m 25s fast. What star did you observe?

Accepted Answer

Option C: Miaplacidus. Identify the star by calculating the Local Hour Angle (LHA) and Declination. Using the chronometer time and DR position, determine the star's coordinates. Comparing the calculated LHA and Declination against the Nautical Almanac star list confirms the observed body is Miaplacidus, matching the provided navigational data.

On 22 February your 1857 ZT DR position is LAT 23&deg;46.0'S, LONG 93&deg;16.5'E. You observe an unidentified star bearing 159&deg;T, at an observed altitude (Ho) of 34&deg;30.0'. The chronometer reads 01h 00m 35s and is 03m 25s fast. What star did you observe?

On 22 February your 1857 ZT DR position is LAT 23°46.0'S, LONG 93°16.5'E. You observe an unidentified star bearing 159°T, at an observed altitude (Ho) of 34°30.0'. The chronometer reads 01h 00m 35s and is 03m 25s fast. What star did you observe?