BAA Computing Section

Main menu

Handbooks sub-menu

Mutual eclipses of the satellites of Jupiter in 2015

All instants are given in UT.

In the list, penumbral eclipses and the penumbral phases of umbral elipses are not taken into consideration.

4e3 means that the shadow of satellite IV falls on satellite III, etc.

"Start" is the instant of first exterior contact of the umbra with a satellite, or the beginning of the eclipse. "End" is the instant of last contact of the umbra with the satellite. These times are given in hours, minutes, and seconds.

Column "Magn." gives the magnitude of the eclipse in %, that is, the fraction of the diameter of the second satellite that is eclipsed in the umbra of the first satellite at maximum phase. 'A' means that the eclipse is "annular"; in that case, the umbra of the first satellite falls entirely on the second satellite, so only an annulus of this satellite remains illuminated by the Sun; but, of course, an observer in the umbra would see a total, not an annular eclipse of the Sun.

Column "Dur." gives the duration of the annular phase, in seconds.

Column "Flux drop" gives the drop of the flux (brillance) of the eclipsed satellite at maximum phase, in %. In the calculation, the contribution of the penumbra has been taken into account.

The next column gives the decrease of the (stellar) magnitude of the eclipsed satellite, at maximum phase. In the calculation, the contribution of the penumbra has been taken into account. Don't confuse this magnitude (which is similar to magnitudes of stars) with the magnitude of the eclipse given in the column "Magn."!

IMPORTANT: Not all these events are visible from a given place!

Date 2015		Satel.	Start h m s	End h m s	Magn. %	Dur. s	Flux drop %	Magn. decrease
Jan	3	2e1	09 02 23	09 09 58	12		12	0.14
	6	2e1	22 29 30	22 36 54	17		16	0.19
	7	2e3	15 58 10	16 30 40	A 39	450	31	0.41
	8	2e3	03 23 52	04 08 46	40		28	0.36
	10	2e1	11 53 36	12 00 45	21		20	0.24
	14	2e1	01 13 43	01 20 40	25		24	0.30
	17	3e4	10 02 02	10 08 06	5		24	0.30
	17	2e1	14 32 39	14 39 22	29		29	0.36
	21	2e1	03 49 06	03 55 39	33		33	0.43
	23	4e3	09 10 40	09 15 23	A 3	260	49	0.73
	24	4e1	05 46 05	05 53 02	19		45	0.65 (a)
	24	2e1	17 04 58	17 11 21	37		38	0.51
	24	4e1	18 52 16	18 57 51	A 37	138	80	1.76
	26	3e1	15 27 31	15 29 11	5		27	0.33
	28	2e1	06 19 08	06 25 21	41		42	0.60
	29	1e3	16 12 52	16 14 30	5		16	0.18
	31	2e1	19 33 01	19 39 05	46		48	0.70
Feb	2	3e4	01 37 18	01 41 46	A 6	235	62	1.05
	2	3e1	18 19 10	18 22 17	23		47	0.69
	4	2e1	08 45 39	08 51 34	50		53	0.81
	5	1e3	18 57 37	19 00 50	20		27	0.34
	7	2e1	21 58 10	22 03 55	A 55	16	58	0.94 (b)
	9	3e1	21 07 42	21 11 24	42		70	1.30
	11	2e1	11 09 39	11 15 15	A 54	69	63	1.07
	11	4e3	13 31 22	13 45 27	A 36	364	64	1.11
	12	1e3	21 45 33	21 49 43	A 24	118	37	0.50
	15	2e1	00 21 08	00 26 34	A 53	88	66	1.19
	16	3e1	23 54 05	23 58 02	63		88	2.31
	18	2e1	13 31 48	13 37 04	A 52	96	69	1.28
	20	1e3	00 36 45	00 41 43	A 26	164	44	0.62
	22	2e1	02 42 32	02 47 36	A 52	97	70	1.32 (c )
	23	3e2	17 12 08	17 13 42	8		46	0.67
	24	3e1	02 39 15	02 43 11	A 75	32	97	3.82
	25	2e1	15 52 33	15 57 26	A 51	94	69	1.28
	27	1e3	03 33 06	03 38 54	A 28	194	47	0.69
Mar	1	2e1	05 02 39	05 07 19	A 50	83	66	1.17
	2	1e2	12 09 33	12 10 20	3		22	0.27
	2	3e2	20 23 58	20 27 25	46		81	1.82
	4	2e1	18 12 10	18 16 38	A 49	66	61	1.03
	6	1e2	01 15 33	01 16 58	11		29	0.37
	6	1e3	06 37 05	06 44 00	A 31	218	47	0.69
	8	2e1	07 21 47	07 25 59	A 49	31	55	0.88
	8	3e4	15 44 13	15 55 43	29		50	0.75
	9	1e2	14 21 45	14 23 35	19		37	0.50
	9	3e2	23 37 15	23 41 16	A 78	26	98	4.27
	11	2e1	20 30 56	20 34 52	43		49	0.73
	13	1e2	03 28 04	03 30 12	27		45	0.65
	13	1e3	09 54 42	10 03 35	A 34	253	46	0.67
	13	1e3	23 19 14	23 40 13	A 47	363	46	0.66
	14	1e3	07 53 35	08 07 18	A 37	364	47	0.69
	15	2e1	09 40 08	09 43 45	37		42	0.60
	16	4e2	06 51 45	06 53 50	7		54	0.84
	16	1e2	16 34 31	16 36 54	34		54	0.83
	17	3e2	02 51 01	02 54 53	59		89	2.43
	18	2e1	22 48 58	22 52 14	30		36	0.48
	20	1e2	05 41 02	05 43 36	42		62	1.05
	20	1e3	13 44 04	13 58 48	A 38	370	46	0.67
	21	1e3	11 43 08	11 51 01	A 33	146	38	0.52
	22	2e1	11 57 51	12 00 43	22		29	0.37
	23	1e2	18 47 40	18 50 23	49		70	1.30
	24	3e2	06 05 46	06 08 36	24		61	1.02
	26	2e1	01 06 28	01 08 51	15		23	0.28
	27	1e2	07 54 22	07 57 13	56		77	1.58
	28	1e3	15 01 17	15 06 05	19		23	0.29
	28	2e3	19 05 03	19 08 47	A 15	9	20	0.24
	29	2e1	14 15 11	14 16 55	8		17	0.20
	30	1e2	21 01 11	21 04 08	A 61	20	83	1.90
Apr	2	2e1	03 23 57	03 24 22	0.4		11	0.13
	3	1e2	10 08 06	10 11 08	A 61	37	87	2.19
	4	2e3	22 24 42	22 29 27	A 13	195	29	0.38
	6	1e2	23 15 04	23 18 10	A 62	42	89	2.41
	10	1e2	12 22 10	12 25 19	A 63	43	90	2.46
	12	2e3	01 43 18	01 48 21	A 12	236	34	0.46
	14	1e2	01 29 20	01 32 30	A 63	39	88	2.33
	17	1e2	14 36 38	14 39 50	A 64	27	86	2.10
	19	2e3	05 01 09	05 05 59	A 11	230	34	0.45
	21	1e2	03 44 00	03 47 12	62		81	1.83
	24	1e2	16 51 30	16 54 42	57		77	1.58
	26	2e3	08 18 28	08 22 28	A 10	176	27	0.35
	28	1e2	05 59 04	06 02 15	52		71	1.36
May	1	1e2	19 06 48	19 09 57	48		66	1.17
	3	2e3	11 35 45	11 37 43	5		15	0.18
	5	1e2	08 14 36	08 17 43	43		61	1.01
	8	1e2	21 22 35	21 25 39	39		56	0.88
	12	1e2	10 30 36	10 33 37	36		51	0.77
	15	1e2	23 38 51	23 41 49	32		46	0.68
	19	1e2	12 47 08	12 50 02	29		42	0.60
	21	3e1	06 36 56	07 21 31	9		17	0.21
	23	1e2	01 55 43	01 58 34	26		39	0.53
	26	1e2	15 04 17	15 07 04	23		36	0.48
	28	3e1	03 41 58	03 56 20	31		38	0.52
	30	1e2	04 13 12	04 15 56	21		33	0.43
Jun	2	1e2	17 22 06	17 24 46	19		30	0.39
	4	3e1	01 49 54	02 04 28	17		23	0.29
	6	1e2	06 31 26	06 34 04	17		28	0.36
	9	1e2	19 40 43	19 43 20	16		26	0.33
	13	1e2	08 50 29	08 53 06	15		25	0.32
	16	1e2	22 00 13	22 02 52	14		24	0.30
	20	1e2	11 10 32	11 13 16	14		24	0.29
	24	1e2	00 20 50	00 23 41	14		23	0.29
	27	1e2	13 31 48	13 34 50	15		24	0.29
Jul	1	1e2	02 42 46	02 46 00	16		24	0.30
	4	1e2	15 54 35	15 58 06	17		25	0.31
	8	1e2	05 06 27	05 10 18	19		26	0.33
	11	1e2	18 19 24	18 23 40	22		28	0.36
	15	1e2	07 32 26	07 37 11	25		31	0.40
	18	1e2	20 46 52	20 52 12	28		34	0.45
	22	1e2	10 01 36	10 07 36	32		38	0.51
	25	1e2	23 18 13	23 25 03	37		42	0.60
	29	1e2	12 35 31	12 43 18	42		47	0.70

Notes

(a) Satellite I is in transit over Jupiter.
(b) Eclipse begins during occultation of I by II.
(c) Almost exactly central.

Data provided by Jean Meeus.

British Astronomical Association - Computing Section - britastro.org/computing

Main menu

Handbooks sub-menu

Mutual eclipses of the satellites of Jupiter in 2015

Notes