On 26 November your 0535 DR position is LAT 27°18.9' S, LONG 30°18.4' E. You observe an unidentified planet bearing 085°T at an observed altitude (Ho) of 32°15.2'. The chronometer reads 03h 33m 16s, and is 01m 48s slow. What planet did you observe?

Question

On 26 November your 0535 DR position is LAT 27&deg;18.9' S, LONG 30&deg;18.4' E. You observe an unidentified planet bearing 085&deg;T at an observed altitude (Ho) of 32&deg;15.2'. The chronometer reads 03h 33m 16s, and is 01m 48s slow. What planet did you observe?

Accepted Answer

Option B: Jupiter. Convert chronometer time to GMT to find the GHA and Dec of planets using the Nautical Almanac. Calculate the LHA and compare the observed Ho with the computed altitude from the Sight Reduction Tables. Matching the calculated coordinates and altitude to the planet's ephemeris confirms Jupiter as the body.

On 26 November your 0535 DR position is LAT 27&deg;18.9' S, LONG 30&deg;18.4' E. You observe an unidentified planet bearing 085&deg;T at an observed altitude (Ho) of 32&deg;15.2'. The chronometer reads 03h 33m 16s, and is 01m 48s slow. What planet did you observe?

On 26 November your 0535 DR position is LAT 27°18.9' S, LONG 30°18.4' E. You observe an unidentified planet bearing 085°T at an observed altitude (Ho) of 32°15.2'. The chronometer reads 03h 33m 16s, and is 01m 48s slow. What planet did you observe?