Altitude Correction Tables for 10° to 90° — Sun, Stars, Planets

SUN SUN Stars & Additional

Refraction
DIP
October ‒ March April ‒ September Planets Altitude always subtracted from Hs
App. Lower Upper App. Lower Upper App. Correction for App. Ht. of Ht. of Ht. of
Alt. Limb Limb Alt. Limb Limb Alt.
Corr Mars & Venus Alt.
Corr Eye
Corr
Eye Eye
Corr
° ' ° ' ° ' A small ° ' meters ' feet meters '
9 33 ' ' 9 39 ' ' 9 55 ' additional 5.5 ‒ 9.1 2.4 8.0 1.0 ‒ 1.8
+10.8 ‒ 21.5 +10.6 ‒ 21.2 ‒ 5.3 altitude ‒ 2.8
9 45 9 50 10 07 correction for 6.0 ‒ 8.5 2.6 8.6 1.5 ‒ 2.2
+10.9 ‒ 21.4 +10.7 ‒ 21.1 ‒ 5.2 ‒ 2.9
9 56 10 02 10 20 Mars & Venus 6.5 ‒ 7.9 2.8 9.2 2.0 ‒ 2.5
+11.0 ‒ 21.3 +10.8 ‒ 21.0 ‒ 5.1 can be ‒ 3.0
10 08 10 14 10 32 obtained in the 7.0 ‒ 7.5 3.0 9.8 2.5 ‒ 2.8
+11.1 ‒ 21.2 +10.9 ‒ 20.9 ‒ 5.0 Daily Pages of
‒ 3.1
10 20 10 27 10 46 7.5 ‒ 7.0 3.2 10.5 3.0 ‒ 3.0
+11.2 ‒ 21.1 +11.0 ‒ 20.8 ‒ 4.9 The Nautical ‒ 3.2
10 33 10 40 10 59 Almanac for the 8.0 ‒ 6.6 3.4 11.2
+11.3 ‒ 21.0 +11.1 ‒ 20.7 ‒ 4.8 day of the ‒ 3.3
10 46 10 53 11 14 8.5 ‒ 6.3 3.6 11.9 See table
11 00
+11.4 ‒ 20.9
11 07
+11.2 ‒ 20.6
11 29
‒ 4.7 observation.
9.0 ‒ 5.9 3.8
‒ 3.4
12.6
←
+11.5 ‒ 20.8 +11.3 ‒ 20.5 ‒ 4.6 ‒ 3.5 meters '
Find the
11 15 11 22 11 44 9.5 ‒ 5.7 4.0 13.3
+11.6 ‒ 20.7 +11.4 ‒ 20.4 ‒ 4.5 correction in ‒ 3.6 20 ‒ 7.9
11 30 11 37 12 00 the block 10.0 ‒ 5.4 4.3 14.1
+11.7 ‒ 20.6 +11.5 ‒ 20.3 ‒ 4.4 labeled ‒ 3.7 22 ‒ 8.3
11 45 11 53 12 17 Horizontal 10.5 ‒ 5.1 4.5 14.9
+11.8 ‒ 20.5 +11.6 ‒ 20.2 ‒ 4.3 ‒ 3.8 24 ‒ 8.6
12 01 12 10 12 35 parallax. 11.0 ‒ 4.9 4.7 15.7
+11.9 ‒ 20.4 +11.7 ‒ 20.1 ‒ 4.2 ‒ 3.9 26 ‒ 9.0
12 18 12 27 12 53 The figure will 11.5 ‒ 4.7 5.0 16.5
+12.0 ‒ 20.3 +11.8 ‒ 20.0 ‒ 4.1 ‒ 4.0 28 ‒ 9.3
12 36 14 45 13 12 cover the range 12.0 ‒ 4.5 5.2 17.4
+12.1 ‒ 20.2 +11.9 ‒ 19.9 ‒ 4.0 of 3 days found ‒ 4.1
12 54 13 04 13 32 on that Daily 12.5 ‒ 4.4 5.5 18.3
+12.2 ‒ 20.1 +12.0 ‒ 19.8 ‒ 3.9 Page.
‒ 4.2 30 ‒ 9.6
13 14 13 24 13 53 13.0 ‒ 4.2 5.8 19.1
+12.3 ‒ 20.0 +12.1 ‒ 19.7 ‒ 3.8 ‒ 4.3 32 ‒ 10.0
13 34 13 44 14 16 13.5 ‒ 4.0 6.1 20.1
+12.4 ‒ 19.9 +12.2 ‒ 19.6 ‒ 3.7 The correction ‒ 4.4 34 ‒ 10.3
13 55 14 06 14 39 14.0 ‒ 3.9 6.3 21.0
+12.5 ‒ 19.8 +12.3 ‒ 19.5 ‒ 3.6 is to be ‒ 4.5 36 ‒ 10.6
14 17 14 29 15 03 subtracted from 14.5 ‒ 3.8 6.6 22.0
+12.6 ‒ 19.7 +12.4 ‒ 19.4 ‒ 3.5 Apparent ‒ 4.6 38 ‒ 10.8
14 41 14 53 15 29 15.0 ‒ 3.6 6.9 22.9
+12.7 ‒ 19.6 +12.5 ‒ 19.3 ‒ 3.4 Altitude. ‒ 4.7
15 05 15 18 15 56 15.5 ‒ 3.5 7.2 23.9
+12.8 ‒ 19.5 +12.6 ‒ 19.2 ‒ 3.3 ‒ 4.8 40 ‒ 11.1
15 31 15 45 16 25 16.0 ‒ 3.4 7.5 24.9
+12.9 ‒ 19.4 +12.7 ‒ 19.1 ‒ 3.2 ‒ 4.9 42 ‒ 11.4
15 59 16 13 16 55 16.5 ‒ 3.3 7.9 26.0
+13.0 ‒ 19.3 +12.8 ‒ 19.0 ‒ 3.1 ‒ 5.0 44 ‒ 11.7
16 27 16 43 17 27 17.0 ‒ 3.2 8.2 27.1
+13.1 ‒ 19.2 +12.9 ‒ 18.9 ‒ 3.0 ‒ 5.1 46 ‒ 11.9
16 58 17 14 18 01 17.5 ‒ 3.1 8.5 28.1
+13.2 ‒ 19.1 +13.0 ‒ 18.8 ‒ 2.9 ‒ 5.2 48 ‒ 12.2
17 30 17 47 18 37 18.0 ‒ 3.0 8.8 29.2
+13.3 ‒ 19.0 +13.1 ‒ 18.7 ‒ 2.8 ‒ 5.3 feet '
18 05 18 23 19 16 18.5 ‒ 2.9 9.2 30.4
+13.4 ‒ 18.9 +13.2 ‒ 18.6 ‒ 2.7 ‒ 5.4 2 ‒ 1.4
18 41 19 00 16 56 19.0 ‒ 2.9 9.5 31.5
+13.5 ‒ 18.8 +13.3 ‒ 18.5 ‒ 2.6 ‒ 5.5 4 ‒ 1.9
19 20 19 41 20 40 19.5 ‒ 2.8 9.9 32.7
+13.6 ‒ 18.7 +13.4 ‒ 18.4 ‒ 2.5 ‒ 5.6 6 ‒ 2.4
20 02 20 24 21 27 20.0 ‒ 2.7 10.3 33.9
+13.7 ‒ 18.6 +13.5 ‒ 18.3 ‒ 2.4 ‒ 5.7 8 ‒ 2.7
20 46 21 10 22 17 21.0 ‒ 2.6 10.6 35.1
+13.8 ‒ 18.5 +13.6 ‒ 18.2 ‒ 2.3 ‒ 5.8 10 ‒ 3.1
21 34 21 59 23 11 22.0 ‒ 2.4 11.0 36.3
+13.9 ‒ 18.4 +13.7 ‒ 18.1 ‒ 2.2 ‒ 5.9
22 25 22 52 24 09 23.0 ‒ 2.3 11.4 37.6 See table
23 20
+14.0 ‒ 18.3
23 49
+13.8 ‒ 18.0
25 12
‒ 2.1
24.0 ‒ 2.2 11.8
‒ 6.0
38.9
←
+14.1 ‒ 18.2 +13.9 ‒ 17.9 ‒ 2.0 ‒ 6.1 feet '
24 20 24 51 26 20 25.0 ‒ 2.1 12.2 40.1
+14.2 ‒ 18.1 +14.0 ‒ 17.8 ‒ 1.9 ‒ 6.2 70 ‒ 8.1
25 24 25 58 27 34 26.0 ‒ 2.0 12.6 41.5
+14.3 ‒ 18.0 +14.1 ‒ 17.7 ‒ 1.8 ‒ 6.3 75 ‒ 8.4
26 34 27 11 28 54 27.0 ‒ 1.9 13.0 15.0
+14.4 ‒ 17.9 +14.2 ‒ 17.6 ‒ 1.7 ‒ 3.9 80 ‒ 8.7
27 50 28 31 30 22 28.0 ‒ 1.9 13.4 44.2
+14.5 ‒ 17.8 +14.3 ‒ 17.5 ‒ 1.6 ‒ 6.5 85 ‒ 8.9
29 13 29 58 31 58 29.0 ‒ 1.8 13.8 45.5
+14.6 ‒ 17.7 +14.4 ‒ 17.4 ‒ 1.5 ‒ 6.6 90 ‒ 9.2
30 44 31 33 33 43 30.0 ‒ 1.7 14.2 46.9
+14.7 ‒ 17.6 +14.5 ‒ 17.3 ‒ 1.4 ‒ 6.7 95 9.5
32 24 33 18 35 38 31.0 ‒ 1.7 14.7 48.4
+14.8 ‒ 17.5 +14.6 ‒ 17.2 ‒ 1.3 ‒ 6.8
34 15 35 15 37 45 32.0 ‒ 1.6 15.1 49.8 100 ‒ 9.7
+14.9 ‒ 17.4 +14.7 ‒ 17.1 ‒ 1.2 ‒ 6.9
36 17 37 24 40 06 33.0 ‒ 1.5 15.5 51.3 105 ‒ 9.9
+15.0 ‒ 17.3 +14.8 ‒ 17.0 ‒ 1.1 ‒ 7.0
38 34 39 48 42 42 34.0 ‒ 1.5 16.0 52.8 110 ‒ 10.2
+15.1 ‒ 17.2 +14.9 ‒ 16.9 ‒ 1.0 ‒ 7.1
41 06 42 28 45 34 35.0 ‒ 1.4 16.5 54.3 115 ‒ 10.4
+15.2 ‒ 17.1 +15.0 ‒ 16.8 ‒ 0.9 ‒ 7.2
43 56 45 29 48 45 36.0 ‒ 1.4 16.9 55.8 120 ‒ 10.6
+15.3 ‒ 17.0 +15.1 ‒ 16.7 ‒ 0.8 ‒ 7.3
47 07 48 52 52 16 37.0 ‒ 1.3 17.4 57.4 125 ‒ 10.8
+15.4 ‒ 16.9 +15.2 ‒ 16.6 ‒ 0.7 ‒ 7.4
50 43 51 41 56 09 38.0 ‒ 1.3 17.9 58.9
+15.5 ‒ 16.8 +15.3 ‒ 16.5 ‒ 0.6 ‒ 7.5 130 ‒ 11.1
54 46 56 59 60 26 39.0 ‒ 1.2 18.4 60.5
+15.6 ‒ 16.7 +15.4 ‒ 16.4 ‒ 0.5 ‒ 7.6 135 ‒ 11.3
59 21 61 50 65 06 40.0 ‒ 1.2 18.8 62.1
+15.7 ‒ 16.6 +15.5 ‒ 16.3 ‒ 0.4 45.0 ‒ 1.0 ‒ 7.7 140 ‒ 11.5
64 28 67 15 70 09 50.0 ‒ 0.8 19.3 63.8
+15.8 ‒ 16.5 +15.6 ‒ 16.2 ‒ 0.3 55.0 ‒ 0.7 ‒ 7.8 145 ‒ 11.7
70 10 73 14 75 32 60.0 ‒ 0.6 19.8 65.4
+15.9 ‒ 16.4 +15.7 ‒ 16.1 ‒ 0.2 65.0 ‒ 0.5 ‒ 7.9 150 ‒ 11.9
76 24 79 42 81 12 70.0 ‒ 0.4 20.4 67.1
+16.0 ‒ 16.3 +15.8 ‒ 16.0 ‒ 0.1 75.0 ‒ 0.3 ‒ 8.0 155 ‒ 12.1
83 05 86 21 87 03 80.0 ‒ 0.2 20.9 68.8
+16.1 ‒ 16.2 +15.9 ‒ 15.9 0.0 85.0 ‒ 0.1 ‒ 8.1
90 00 90 00 90 00 21.4 70.5
App. Alt. = Apparent altitude = Sextant altitude corrected for index error and dip.
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 Altitude Correction Tables for 0° to 10° — Sun, Stars, Planets
Sun Sun Sun Sun
Stars Stars
App. October – March April – September App. October – March April – September
& &
Alt. Lower Upper Lower Upper Planets Alt. Lower Upper Lower Upper Planets
Limb Limb Limb Limb Limb Limb Limb Limb
° ' ' ' ' ' ' ° ' ' ' ' ' '
0 00 ‒ 17.5 ‒ 49.8 ‒ 17.8 ‒ 49.6 ‒ 33.8 3 30 + 3.4 ‒ 28.9 + 3.1 ‒ 28.7 ‒ 12.9
0 03 16.9 49.2 17.2 49.0 33.2 3 35 3.6 28.7 3.3 28.5 12.7
0 06 16.3 48.6 16.6 48.4 32.6 3 40 3.8 28.5 3.6 28.2 12.5
0 09 15.7 48.0 16.0 47.8 32.0 3 45 4.0 28.3 3.8 28.0 12.3
0 12 15.2 47.5 15.4 47.2 31.5 3 50 4.2 28.1 4.0 27.8 12.1
0 15 14.6 46.9 14.8 46.6 30.9 3 55 4.4 27.9 4.1 27.7 11.9
0 18 ‒ 14.1 ‒ 46.4 ‒ 14.3 ‒ 46.1 ‒ 30.4 4 00 + 4.6 ‒ 27.7 + 4.3 ‒ 27.5 ‒ 11.7
0 21 13.5 45.8 13.8 33.8 29.8 4 05 4.8 27.5 4.5 27.3 11.5
0 24 13.0 45.3 13.3 45.1 29.3 4 10 4.9 27.4 4.7 27.1 11.4
0 27 12.5 44.8 12.8 44.6 28.8 4 15 5.1 27.2 4.9 26.9 11.2
0 30 12.0 44.3 12.3 44.1 28.3 4 20 5.3 27.0 5.0 26.8 11.0
0 33 11.6 43.9 11.8 43.6 27.9 4 25 5.4 26.9 5.2 26.6 10.9
0 36 ‒ 11.1 ‒ 10.0 ‒ 11.3 ‒ 43.1 ‒ 27.4 4 30 + 5.6 ‒ 26.7 + 5.3 ‒ 26.5 ‒ 10.7
0 39 10.6 42.9 10.9 42.7 26.9 4 35 5.7 26.6 5.5 26.3 10.6
0 42 10.2 42.5 10.5 42.3 26.5 4 40 5.9 26.4 5.6 26.2 10.4
0 45 9.8 42.1 10.0 41.8 26.1 4 45 6.0 26.3 5.8 26.0 10.3
0 48 9.4 41.7 9.6 41.4 25.7 4 50 6.2 26.1 5.9 25.9 10.1
0 51 9.0 41.3 9.2 41.0 25.3 4 55 6.3 26.0 6.1 25.7 10.0
0 54 ‒ 8.6 ‒ 40.9 ‒ 8.8 ‒ 40.6 ‒ 24.9 5 00 + 6.4 ‒ 25.9 + 6.2 ‒ 25.6 ‒ 9.9
0 57 8.2 40.5 8.4 40.2 24.5 5 05 6.6 25.7 6.3 25.5 9.7
1 00 7.8 40.1 8.0 39.8 24.1 5 10 6.7 25.6 6.5 25.3 9.6
1 03 7.4 39.7 7.7 39.5 23.7 5 15 6.8 25.5 6.6 25.2 9.5
1 06 7.1 39.4 7.3 39.1 23.4 5 20 7.0 25.3 6.7 25.1 9.3
1 09 6.7 39.0 7.0 38.8 23.0 5 25 7.1 25.2 6.8 25.0 9.2
1 12 ‒ 6.4 ‒ 38.7 ‒ 6.6 ‒ 38.4 ‒ 22.7 5 30 + 7.2 ‒ 25.1 + 6.9 ‒ 24.9 ‒ 9.1
1 15 6.0 38.3 6.3 38.1 22.3 5 35 7.3 25.0 7.1 24.7 9.0
1 18 5.7 38.0 6.0 37.8 22.0 5 40 7.4 24.9 7.2 24.6 8.9
1 21 5.4 37.7 5.7 37.5 21.7 5 45 7.5 24.8 7.3 24.5 8.8
1 24 5.1 37.4 5.3 37.1 21.4 5 50 7.6 24.7 7.4 24.4 8.7
1 27 4.8 37.1 5.0 33.8 21.1 5 55 7.7 24.6 7.5 24.3 8.6
1 30 ‒ 4.5 ‒ 36.8 ‒ 4.7 ‒ 36.5 ‒ 20.8 6 00 + 7.8 ‒ 24.5 + 7.6 ‒ 24.2 ‒ 8.5
1 35 4.0 36.3 4.3 36.1 20.3 6 10 8.0 24.3 7.8 24.0 8.3
1 40 3.6 35.9 3.8 35.6 19.9 6 20 8.2 24.1 8.0 23.8 8.1
1 45 3.1 35.4 3.4 35.2 19.4 6 30 8.4 23.9 8.2 23.6 7.9
1 50 2.7 35.0 2.9 34.7 19.0 6 40 8.6 23.7 8.3 23.5 7.7
1 55 2.3 34.6 2.5 34.3 18.6 6 50 8.7 23.6 8.5 23.3 7.6
2 00 ‒ 1.9 ‒ 34.2 ‒ 2.1 ‒ 33.9 ‒ 18.2 7 00 + 8.9 ‒ 23.4 + 8.7 ‒ 23.1 ‒ 7.4
2 05 1.5 33.8 1.7 33.5 17.8 7 10 9.1 23.2 8.8 23.0 7.2
2 10 1.1 33.4 1.4 33.2 17.4 7 20 9.2 23.1 9.0 22.8 7.1
2 15 0.8 33.1 1.0 32.8 17.1 7 30 9.3 23.0 9.1 22.7 6.9
2 20 0.4 32.7 0.7 32.5 16.7 7 40 9.5 22.8 9.2 22.6 6.8
2 25 ‒ 0.1 32.4 ‒ 0.3 32.1 16.4 7 50 9.6 22.7 9.4 22.4 6.7
2 30 + 0.2 ‒ 32.1 0.0 ‒ 31.8 ‒ 16.1 8 00 + 9.7 ‒ 22.6 + 9.5 ‒ 22.3 ‒ 6.6
2 35 0.5 31.8 + 0.3 31.5 15.8 8 10 9.9 22.4 9.6 22.2 6.4
2 40 0.8 31.5 0.6 31.2 15.4 8 20 10.0 22.3 9.7 22.1 6.3
2 45 1.1 31.2 0.9 30.9 15.2 8 30 10.1 22.2 9.9 21.9 6.2
2 50 1.4 30.9 1.2 30.6 14.9 8 40 10.2 22.1 10.0 21.8 6.1
2 55 1.7 30.6 1.4 30.4 14.9 8 50 10.3 22.0 10.1 21.7 6.0
3 00 + 2.0 ‒ 30.3 + 1.7 ‒ 30.1 ‒ 14.3 9 00 + 10.4 ‒ 21.9 + 10.2 ‒ 21.6 ‒ 5.9
3 05 2.2 30.1 2.0 29.8 14.1 9 10 10.5 21.8 10.3 21.5 5.8
3 10 2.5 29.8 2.2 29.6 13.8 9 20 10.6 21.7 10.4 21.4 5.7
3 15 2.7 29.6 2.5 29.3 13.6 9 30 10.7 21.6 10.5 21.3 5.6
3 20 2.9 29.4 2.7 29.1 13.4 9 40 10.8 21.5 10.6 21.2 5.5
3 25 3.2 29.1 2.9 28.9 13.4 9 50 10.9 21.4 10.6 21.2 5.4
3 30 3.4 ‒ 28.9 + 3.1 ‒ 28.7 ‒ 12.9 10 00 + 11.0 ‒ 21.3 + 10.7 ‒ 21.1 ‒ 5.3
For bubble sextant observations- ignore dip and use star corrections for the Sun, planets and stars.
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