76 (98)

76

TABLES FOR INTERPOLATING SUNRISE, MOONRISE, ETC

TABLE I—FOR LAT1TUDE

Tabular Intcrval

Diffcrencr bctwccn tbc times for conaccutivc Iatitude*

«•*		r		a*	5*	10“ 15*		20- 25"		30-	35-	40- 45-		50- 55-		60*	i» 05"	1* 10-	i^115*		l^fc 20*
• ! o 30	0	*5	0	06	O	0	I	1	I	1	I	2	2	2	2	2	O 02	0 02	0	02	0 02
1 OO	0	30	0	la	O	1	I	2	2	3	3	3	4	4	4	5	05	05		05	05
I 30	0	45	0	18	I	1	a	3	3	4	4	5	5	6	7	7	07	07		07	07
2 OO	1	OO	0 24		i	a	3	4	5	5	6	7	7	8	9	10	10	10		10	IO
a 30	I	*5	« 3«v		I •	a	4	5	6	7	8	9	9	10	II	12	12	*3		«3	*3
3 OO	I	30	0	3*	I	3	A 4	6	7	8	9	10	11	12	*3	14	0 15	0 15	0	16	0 16
3 30	I	45	0	4*	a	3	5	7	8	10	li	12	13	U	16	>7	18	18		*9	19
4 00	a	OO	0	48	2	4	6	8	9	II	13	14	*5	16	18	19	20	21		22	22
4 30	a	15	0	54	2	4	7	9	11	*3	«5	16	18	19	21	22	23	24		25	26
5 00	a	30	1	00	2	5	7	10	ia	14	16	18	20	22	23	25	26	27		28	29
5 30	a	45	1	06	3	5	8	11	*3	16	18	20	22	24	26	28	0 29	0 30	0	3i	0 32
6 00	3	00	1	sa	3	6	9	12	14	17	20	22	24	26	29	31	32	33		34	36
6 30	3	>5	1	18	3	6	10	13	16	19	22	24	26	29	31	34	36	37		3«	40
7 00	3	30	1	*4	3	7	10	U	17	20	23	26	29	31	34	37	39	4i		42	44
7 30	3	45	1	30	4	7	11-	*5	18	22	25	28	3«	34	37	40	43	44		46	48
8 00	4	00	i	3*	4	8	12	16	20	23	27	30	34	37	4*	44	0 47	0 48	0	5*	0 53
8 30	4	*5	1	4i	4	8	13	*7	21	25	29	33	36	40	44	48	O 51	0 53	0	56	0 58
9 OO	4	30	1	48	4	9	13	18	22	27	31	35	39	43	47	52	0 55	0 58	1	01	1 04
9 30	4	45	1	54	5	9	14	19	24	28	33	38	42	47	5«	56	i 00	1 04	1	08	I 12
10 OO	5	00	2	00	5	10	>5	20	25	30	35	40	45	50	55	60	l 05	1 10	1	15	I 20

Table I is for intcrpolating the L.M.T. of sunrisc, twilight, moonrise, etc., for Iatitude. lt i* 10 be entcred, in the appropriate column on ihe left, with the diffcrencc bctwccn lnic Utitudc and che nearest (abular lalitudc which is lc$t than the iruc laiiiudc; and with the argument ac the top which is the nearest vaiuc of the diffcrencc bctwccn the times for the tabular lalitudc and the ncxt higher one; the corrcction so obtained is applied to the time for the tabular iatitude; the sign of the correction can be scen by inspcction. lt is to bc noted that the intcrpolation is noc lincar, so that when using this table it is essentia! to tukę out the tabular phenomenon for the Iatitude Uis than the truć Iatitude.

TABLE 11—FOR LONGITUDE

Long.

Hast

Diffcrencc bctwccn the times for givcn dale and prcccding Jatc (for cast longitudc) or fot givcn datc and followtng datc (for west longitudc)

OT West	I0*20*>0*			40" 50* 60*		I* ♦ IO** 20"* 30^n*			!^fc ♦ 40** 50" 60"			2**	IO-	i^1	20*	2*	30*	a*	40*	2* JO*		3‘	00*
•
0	O	0	O	0 0	0	0	0	0	O	0	0	O	00	0	00	O	OO	0	00	O	OO	O	00
10	0	i	1	I I	2	2	2	2	3	3	3		04		04		04		04		05		05
20	I	i	2	2 3	3	4	4	5	6	6	7		07		08		08		09		09		10
30	1	2	2	3 4	5	6	7	7	8	9	10		II		12		12		*3		14		15
40	I	2	3	4 6	7	8	9	10	II	12	13		14		16		17		18		19		20
50	I	3	4	6 7	8	10	II	12	14	15	>7	0	18	0	19	O	21	0	22	O	24	0	25
60	2	3	5	7 »	10	12	*3	*5	17	18	20		22		23		25		27		28		30
70	2	4	6	8 10	* ^ł.2	14	16	>7	19	21	23		25		27		29		3«		33		35
80	2	4	7	9 U	»3	16	18	20	22	24	27		29		3i		33		36		38		40
90	2	5	7	IO 12 l 4		17	20	22	25	27	30		32		35		37		40		42		45
IOO	3	6	8	II 14	17	19	22	25	28	31	33	O	36	0	39	O	42	0	44	O	47	O	50
no	3	' 6	9	^,ł h	,81	21	24	27	31	34	37		40		43		46		49	O	52	0	55
120	3	7	10	^13 k-	^JO!	23	27	30	33	37	40		43		47		50		.53	O	57	I	00
130	4	7	11	14 T8	22	25	29	32	36	40	43		47		51		54	0	58	I	Ol	I	05
140	4	8	12	16 19	23	27	31	35	39	43	47		5*		54	0	58	1	02	1	06	I	10
150	4	8	13	17 21	25	29	33	38	42	46	50	O	54	0	58	I	03	1	07	I	II	I	15
160	4	9	13	18 22	27	3*	36	40	44	49	53	O	58	1	02	I	07	1	II	I	16	I	20
170	5	9	>4	19 24	28	33	38	42	47	52	57	I	Ol	1	06	I	II	1	16	I	20	1	25
180	5	10	15	20 25	30	35	40	45	50	55	60	I	05	1	10	1	*5	1	20	I	?I	1	30

'Labie 11 is for intcrpolating the L.M.T. of moonrise, moonset and the Moon’s meridian passage for longitudc. It is entered with longitudc and with the diffcrencc bctwccn the times for ihc given datc and for the prcccding datc (in cast longitudc*) or folłowing datc (in west longitudc*) The correction is normally ajded for west longitudc* and subtracted for cast longitudcs, but if, as occaskmally happens, the times bccomc carlicr cach day instead of latcr, the signs of the corrections must bc rcversed.

XXXII