On 23 September your 1836 DR position is LAT 25°18'S, LONG 162°23'E. You observe an unidentified star bearing 000°T at an observed altitude (Ho) of 26°18'. The chronometer reads 07h 34m 12s, and is 01m 54s slow. What star did you observe?

Question

On 23 September your 1836 DR position is LAT 25&deg;18'S, LONG 162&deg;23'E. You observe an unidentified star bearing 000&deg;T at an observed altitude (Ho) of 26&deg;18'. The chronometer reads 07h 34m 12s, and is 01m 54s slow. What star did you observe?

Accepted Answer

Option D: Vega. Determine the Greenwich Hour Angle (GHA) of Aries and the Sidereal Hour Angle (SHA) of the body. Using the observed altitude and bearing, calculate the Local Hour Angle (LHA). Comparing the calculated LHA and Declination against the Nautical Almanac star list identifies the body as Vega.

On 23 September your 1836 DR position is LAT 25&deg;18'S, LONG 162&deg;23'E. You observe an unidentified star bearing 000&deg;T at an observed altitude (Ho) of 26&deg;18'. The chronometer reads 07h 34m 12s, and is 01m 54s slow. What star did you observe?

On 23 September your 1836 DR position is LAT 25°18'S, LONG 162°23'E. You observe an unidentified star bearing 000°T at an observed altitude (Ho) of 26°18'. The chronometer reads 07h 34m 12s, and is 01m 54s slow. What star did you observe?