Sun Data

Col. 1 : Date

Col. 2 : Equation of Time. Number of minutes and seconds a sundial is fast or slow (col. 3) compared with an accurate clock which shows local mean time. Also see notes at foot of table.

Col. 4 : Declination of the Sun in degrees and minutes. When negative the sun is south of the celestial equator, when positive, north. Values are averaged over the 4 year leap year cycle.


 			
                           Jan1		3.12	S	-23.04
                           Jan2		3.40	S	-22.59
                           Jan3		4.08	S	-22.54
		  	   Jan4		4.36	S	-22.48
                           Jan5		5.03	S	-22.42
                           Jan6		5.30	S	-22.36
                           Jan7		5.57	S	-22.28
                           Jan8		6.23	S	-22.21
                           Jan9		6.49	S	-22.13
                           Jan10	7.14	S	-22.05
                           Jan11	7.38	S	-21.56
                           Jan12	8.02	S	-21.47
                           Jan13	8.25	S	-21.37
                           Jan14	8.48	S	-21.27
                           Jan15	9.10	S	-21.16
                           Jan16	9.32	S	-21.06
                           Jan17	9.52	S	-20.54
                           Jan18	10.12	S	-20.42
                           Jan19	10.32	S	-20.30
                           Jan20	10.50	S	-20.18
                           Jan21	11.08	S	-20.05
                           Jan22	11.25	S	-19.52
                           Jan23	11.41	S	-19.38
                           Jan24	11.57	S	-19.24
                           Jan25	12.12	S	-19.10
                           Jan26	12.26	S	-18.55
                           Jan27	12.39	S	-18.40
                           Jan28	12.51	S	-18.25
                           Jan29	13.03	S	-18.09
                           Jan30	13.14	S	-17.53
                           Jan31	13.24	S	-17.37
                           Feb1		13.33	S	-17.20
                           Feb2		13.41	S	-17.03
                           Feb3		13.48	S	-16.46
                           Feb4		13.55	S	-16.28
                           Feb5		14.01	S	-16.10
                           Feb6		14.06	S	-15.52
                           Feb7		14.10	S	-15.34
                           Feb8		14.14	S	-15.15
                           Feb9		14.16	S	-14.56
                           Feb10	14.18	S	-14.37
                           Feb11	14.19	S	-14.18
                           Feb12	14.20	S	-13.58
                           Feb13	14.19	S	-13.38
                           Feb14	14.18	S	-13.18
                           Feb15	14.16	S	-12.58
                           Feb16	14.13	S	-12.37
                           Feb17	14.10	S	-12.16
                           Feb18	14.06	S	-11.55
                           Feb19	14.01	S	-11.34
                           Feb20	13.55	S	-11.13
                           Feb21	13.49	S	-10.52
                           Feb22	13.42	S	-10.30
                           Feb23	13.35	S	-10.08
                           Feb24	13.27	S	-9.46
                           Feb25	13.18	S	-9.24
                           Feb26	13.09	S	-9.02
                           Feb27	12.59	S	-8.39
                           Feb28	12.48	S	-8.17
                           Feb29	12.42	S	-8.03
                           Mar1		12.34	S	-7.49
                           Mar2		12.23	S	-7.26
                           Mar3		12.11	S	-7.03
                           Mar4		11.58	S	-6.40
                           Mar5		11.45	S	-6.17
                           Mar6		11.31	S	-5.54
                           Mar7		11.17	S	-5.30
                           Mar8		11.03	S	-5.07
                           Mar9		10.48	S	-4.44
                           Mar10	10.33	S	-4.20
                           Mar11	10.18	S	-3.57
                           Mar12	10.02	S	-3.33
                           Mar13	9.46	S	-3.10
                           Mar14	9.30	S	-2.46
                           Mar15	9.13	S	-2.22
                           Mar16	8.56	S	-1.59
                           Mar17	8.39	S	-1.35
                           Mar18	8.22	S	-1.11
                           Mar19	8.04	S	-0.48
                           Mar20	7.46	S	-0.24
                           Mar21	7.28	S	0
                           Mar22	7.10	S	0.24
                           Mar23	6.52	S	0.47
                           Mar24	6.34	S	1.11
                           Mar25	6.16	S	1.35
                           Mar26	5.58	S	1.58
                           Mar27	5.40	S	2.22
                           Mar28	5.21	S	2.45
                           Mar29	5.02	S	3.09
                           Mar30	4.44	S	3.32
                           Mar31	4.26	S	3.55
		  	   Apr1		4.08	S	4.18
                           Apr2		3.50	S	4.18
                           Apr3		3.32	S	5.05
                           Apr4		3.14	S	5.28
                           Apr5		2.57	S	5.51
                           Apr6		2.40	S	6.13
                           Apr7		2.23	S	6.36
                           Apr8		2.06	S	6.59
                           Apr9		1.49	S	7.21
                           Apr10	1.32	S	7.43
                           Apr11	1.16	S	8.07
                           Apr12	1.00	S	8.28
                           Apr13	0.44	S	8.50
                           Apr14	0.29	S	9.11
                           Apr15	0.14	S	9.33
                           Apr16	0.01	F	9.54
                           Apr17	0.15	F	10.16
                           Apr18	0.29	F	10.37
                           Apr19	0.43	F	10.58
                           Apr20	0.56	F	11.19
                           Apr21	1.00	F	11.39
                           Apr22	1.21	F	12
                           Apr23	1.33	F	12.2
                           Apr24	1.45	F	12.4
                           Apr25	1.56	F	13
                           Apr26	2.06	F	13.19
                           Apr27	2.16	F	13.38
                           Apr28	2.26	F	13.58
                           Apr29	2.35	F	14.16
                           Apr30	2.43	F	14.35
                           May1		2.51	F	14.54
                           May2		2.59	F	15.12
                           May3		3.06	F	15.30
                           May4		3.12	F	15.47
                           May5		3.18	F	16.05
                           May6		3.23	F	16.22
                           May7		3.27	F	16.39
                           May8		3.31	F	16.55
                           May9		3.35	F	17.12
                           May10	3.38	F	17.27
                           May11	3.40	F	17.43
                           May12	3.42	F	17.59
                           May13	3.44	F	18.14
                           May14	3.44	F	18.29
                           May15	3.44	F	18.43
                           May16	3.44	F	18.58
                           May17	3.43	F	19.11
                           May18	3.41	F	19.25
                           May19	3.39	F	19.38
                           May20	3.37	F	19.51
                           May21	3.34	F	20.04
                           May22	3.30	F	20.16
                           May23	3.24	F	20.28
                           May24	3.21	F	20.39
                           May25	3.16	F	20.50
                           May26	3.10	F	21.01
                           May27	3.03	F	21.12
                           May28	2.56	F	21.22
                           May29	2.49	F	21.31
                           May30	2.41	F	21.41
                           May31	2.33	F	21.50
                           Jun1		2.25	F	21.58
                           Jun2		2.16	F	22.06
                           Jun3		2.06	F	22.14
                           Jun4		1.56	F	22.22
                           Jun5		1.46	F	22.29
                           Jun6		1.36	F	22.35
                           Jun7		1.25	F	22.42
                           Jun8		1.14	F	22.47
                           Jun9		1.03	F	22.53
                           Jun10	0.51	F	22.58
                           Jun11	0.39	F	23.02
                           Jun12	0.27	F	23.07
                           Jun13	0.15	F	23.11
                           Jun14	0.03	F	23.14
                           Jun15	0.10	S	23.17
                           Jun16	0.23	S	23.20
                           Jun17	0.36	S	23.22
                           Jun18	0.49	S	23.24
                           Jun19	1.02	S	23.25
                           Jun20	1.15	S	23.26
                           Jun21	1.28	S	23.26
                           Jun22	1.41	S	23.26
                           Jun23	1.54	S	23.26
                           Jun24	2.07	S	23.25
                           Jun25	2.20	S	23.24
                           Jun26	2.33	S	23.23
                           Jun27	2.45	S	23.21
                           Jun28	2.57	S	23.19
                           Jun29	3.09	S	23.16
                           Jun30	3.21	S	23.13
                           Jul1		3.33	S	23.09
                           Jul2		3.45	S	23.05
                           Jul3		3.57	S	23.01
                           Jul4		4.08	S	22.56
                           Jul5		4.19	S	22.51
                           Jul6		4.29	S	22.45
                           Jul7		4.39	S	22.39
                           Jul8		4.49	S	22.33
                           Jul9		4.58	S	22.26
                           Jul10	5.07	S	22.19
                           Jul11	5.16	S	22.11
                           Jul12	5.24	S	22.04
                           Jul13	5.32	S	21.55
                           Jul14	5.39	S	21.46
                           Jul15	5.46	S	21.37
                           Jul16	5.52	S	21.28
                           Jul17	5.58	S	21.18
                           Jul18	6.03	S	21.08
                           Jul19	6.08	S	20.58
                           Jul20	6.12	S	20.47
                           Jul21	6.15	S	20.36
                           Jul22	6.18	S	20.24
                           Jul23	6.20	S	20.12
                           Jul24	6.22	S	20
                           Jul25	6.24	S	19.47
                           Jul26	6.25	S	19.34
                           Jul27	6.25	S	19.21
                           Jul28	6.24	S	19.08
                           Jul29	6.23	S	18.54
                           Jul30	6.21	S	18.40
                           Jul31	6.19	S	18.25
                           Aug1		6.16	S	18.1
                           Aug2		6.13	S	17.55
                           Aug3		6.09	S	17.40
                           Aug4		6.04	S	17.24
                           Aug5		5.59	S	17.08
                           Aug6		5.53	S	16.52
                           Aug7		5.46	S	16.36
                           Aug8		5.39	S	16.19
                           Aug9		5.31	S	16.02
                           Aug10	5.23	S	15.45
                           Aug11	5.14	S	15.27
                           Aug12	5.05	S	15.10
                           Aug13	4.55	S	14.52
                           Aug14	4.44	S	14.33
                           Aug15	4.33	S	14.15
                           Aug16	4.21	S	13.56
                           Aug17	4.09	S	13.37
                           Aug18	3.57	S	13.18
                           Aug19	3.44	S	12.59
                           Aug20	3.30	S	12.39
                           Aug21	3.16	S	12.19
                           Aug22	3.01	S	11.59
                           Aug23	2.46	S	11.39
                           Aug24	2.30	S	11.19
                           Aug25	2.14	S	10.58
                           Aug26	1.58	S	10.38
                           Aug27	1.41	S	10.17
                           Aug28	1.24	S	9.56
                           Aug29	1.07	S	9.35
                           Aug30	0.49	S	9.13
                           Aug31	0.31	S	8.52
                           Sep1		0.12	S	8.30
                           Sep2		0.07	F	8.09
                           Sep3		0.26	F	7.47
                           Sep4		0.45	F	7.25
                           Sep5		1.05	F	7.03
                           Sep6		1.25	F	6.40
                           Sep7		1.45	F	6.18
                           Sep8		2.05	F	5.56
                           Sep9		2.26	F	5.33
                           Sep10	2.47	F	5.10
                           Sep11	3.08	F	4.48
                           Sep12	3.29	F	4.25
                           Sep13	3.50	F	4.02
                           Sep14	4.11	F	3.39
                           Sep15	4.32	F	3.16
                           Sep16	4.53	F	2.53
                           Sep17	5.14	F	2.30
                           Sep18	5.35	F	2.06
                           Sep19	5.56	F	1.43
                           Sep20	6.18	F	1.20
                           Sep21	6.40	F	0.57
                           Sep22	7.01	F	0.33
                           Sep23	7.22	F	0.10
                           Sep24	7.43	F	-0.14
                           Sep25	8.04	F	-0.37
                           Sep26	8.25	F	-1
                           Sep27	8.46	F	-1.24
                           Sep28	9.06	F	-1.47
                           Sep29	9.26	F	-2.10
                           Sep30	9.46	F	-2.34
                           Oct1		10.05	F	-2.57
                           Oct2		10.24	F	-3.20
                           Oct3		10.43	F	-3.44
                           Oct4		11.02	F	-4.07
                           Oct5		11.20	F	-4.30
                           Oct6		11.38	F	-4.53
                           Oct7		11.56	F	-5.16
                           Oct8		12.13	F	-5.39
                           Oct9		12.30	F	-6.02
                           Oct10	12.46	F	-6.25
                           Oct11	13.02	F	-6.48
                           Oct12	13.18	F	-7.10
                           Oct13	13.33	F	-7.32
                           Oct14	13.47	F	-7.55
                           Oct15	14.01	F	-8.18
                           Oct16	14.14	F	-8.40
                           Oct17	14.27	F	-9.02
                           Oct18	14.39	F	-9.24
                           Oct19	14.51	F	-9.45
                           Oct20	15.02	F	-10.07
                           Oct21	15.12	F	-10.29
                           Oct22	15.22	F	-10.50
                           Oct23	15.31	F	-11.12
                           Oct24	15.40	F	-11.33
                           Oct25	15.57	F	-11.54
                           Oct26	15.54	F	-12.14
                           Oct27	16.01	F	-12.35
                           Oct28	16.06	F	-12.55
                           Oct29	16.11	F	-13.15
                           Oct30	16.15	F	-13.35
                           Oct31	16.18	F	-13.55
                           Nov1		16.20	F	-14.14
                           Nov2		16.22	F	-14.34
                           Nov3		16.23	F	-14.53
                           Nov4		16.23	F	-15.11
                           Nov5		16.22	F	-15.30
                           Nov6		16.20	F	-15.48
                           Nov7		16.18	F	-16.06
                           Nov8		16.15	F	-16.24
                           Nov9		16.11	F	-16.41
                           Nov10	16.06	F	-16.58
                           Nov11	16.00	F	-17.15
                           Nov12	15.53	F	-17.32
                           Nov13	15.46	F	-17.48
                           Nov14	15.37	F	-18.04
                           Nov15	15.28	F	-18.20
                           Nov16	15.18	F	-18.35
                           Nov17	15.07	F	-18.50
                           Nov18	14.56	F	-19.05
                           Nov19	14.43	F	-19.19
                           Nov20	14.30	F	-19.33
                           Nov21	14.16	F	-19.47
                           Nov22	14.01	F	-20
                           Nov23	13.45	F	-20.13
                           Nov24	13.28	F	-20.26
                           Nov25	13.11	F	-20.38
                           Nov26	12.53	F	-20.50
                           Nov27	12.34	F	-21.01
                           Nov28	12.14	F	-21.12
                           Nov29	11.54	F	-21.23
                           Nov30	11.33	F	-21.33
                           Dec1		11.11	F	-21.43
                           Dec2		10.49	F	-21.52
                           Dec3		10.26	F	-22.01
                           Dec4		10.02	F	-22.10
                           Dec5		9.38	F	-22.18
                           Dec6		9.13	F	-22.25
                           Dec7		8.48	F	-22.32
                           Dec8		8.22	F	-22.39
                           Dec9		7.56	F	-22.46
                           Dec10	7.29	F	-22.52
                           Dec11	7.02	F	-22.57
                           Dec12	6.34	F	-23.02
                           Dec13	6.06	F	-23.07
                           Dec14	5.38	F	-23.11
                           Dec15	5.09	F	-23.14
                           Dec16	4.40	F	-23.17
                           Dec17	4.11	F	-23.20
                           Dec18	3.42	F	-23.22
                           Dec19	3.13	F	-23.24
                           Dec20	2.43	F	-23.25
                           Dec21	2.13	F	-23.26
                           Dec22	1.43	F	-23.26
                           Dec23	1.13	F	-23.26
                           Dec24	0.43	F	-23.26
                           Dec25	0.13	F	-23.25
                           Dec26	0.17	S	-23.23
                           Dec27	0.47	S	-23.21
                           Dec28	1.16	S	-23.19
                           Dec29	1.45	S	-23.16
                           Dec30	2.14	S	-23.12
                           Dec31	2.43	S	-23.08


Notes

A sundial may also require two further corrections:-

1. Longitude correction due to its being sited off the local time meridian.

2. Compensation for any daylight saving scheme in operation.

Return to top of table