Report p.482, Feb. 5, 1844: Meridian Transit of the Sun

Double altitudes

70° 04' 45"

The lower limb of the sun reflected in the artificial horizon +52" index error

True Central Altitude

35° 17' 49"

1/2 the above plus the semi-diameter of the sun

Finding the declination for the date and longitude

Bowditch 2/5/44

 

 

16° 05'

 

 

16° 05'

 

Bowditch 2/6/44

-

15° 47'

 

-

00° 06'

 

 

 

 

00° 18'

÷ 3 = 6'

 

15° 59'

The declination adjusted for W120°

Calculating the height of the sun for the date and latitude and longitude

 

89° 60'

Alt of pole

-

38° 42'

Latitude

 

51° 18'

compliment

-

15° 59'

declination

 

35° 19'

 

-

00° 01' 14"

refraction and parallax

 

35° 17' 46"

true central altitude of sun

home page
Bob Graham