On 14 January your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 212°T at an observed altitude (Ho) of 41°42.3'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?

Question

On 14 January your 0550 DR position is LAT 25&deg;26.0'N, LONG 38&deg;16.0'W. You observe an unidentified star bearing 212&deg;T at an observed altitude (Ho) of 41&deg;42.3'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?

Accepted Answer

Option A: Gienah. Calculate GHA Aries and LHA Aries from the chronometer time. Determine the star's LHA using the DR longitude. By entering Pub. 229 with the DR latitude and calculated LHA, the observed altitude and bearing match the coordinates for Gienah, consistent with standard celestial navigation reduction procedures for unidentified stars.

On 14 January your 0550 DR position is LAT 25&deg;26.0'N, LONG 38&deg;16.0'W. You observe an unidentified star bearing 212&deg;T at an observed altitude (Ho) of 41&deg;42.3'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?

On 14 January your 0550 DR position is LAT 25°26.0'N, LONG 38°16.0'W. You observe an unidentified star bearing 212°T at an observed altitude (Ho) of 41°42.3'. The chronometer reads 08h 48m 51s, and is 01m 22s slow. What star did you observe?