Saros 91

Catalog of Solar Eclipses of Saros 91

Fred Espenak

Introduction

The periodicity and recurrence of solar eclipses is governed by the Saros cycle, a period of approximately 6,585.3 days (18 years 11 days 8 hours). When two eclipses are separated by a period of one Saros, they share a very similar geometry. The two eclipses occur at the same node with the Moon at nearly the same distance from Earth and the same time of year due to a harmonic in three cycles of the Moon's orbit. Thus, the Saros is useful for organizing eclipses into families or series. Each series typically lasts 12 to 13 centuries and contains 70 or more eclipses. Every saros series begins with a number of partial eclipses near one of Earth's polar regions. The series will then produce several dozen central eclipses before ending with a group of partial eclipses near the opposite pole. For more information, see Periodicity of Solar Eclipses.

Catalog of Solar Eclipses of Saros 91

The table below lists the concise characteristics of every solar eclipse belonging to Saros 91 . The date and time of each eclipse is given for the instant of Greatest Eclipse. For eclipses between the years -1999 to 3000, the calendar date links to a web page containing additional details and a map showing the geographic region of eclipse visibility for that eclipse. A description of each parameter in the catalog table can be found in Key to Saros Catalog of Solar Eclipses.

Catalog of Solar Eclipses of Saros 91
Seq Num Rel Num Calendar Date TD of Greatest Eclipse ΔT

s
ΔT Sigma
s
Luna Num Ecl Type QLE Gamma Ecl Mag Lat

°
Long

°
Sun Alt
°
Path Width km Central Dur
1-40 -0159-Aug-0616:16:46 12227 313 -26696 Pb t- 1.5261 0.0124 69N 137E 0 - -
2-39 -0141-Aug-1800:07:09 12020 307 -26473 P t- 1.4736 0.1127 70N 6E 0 - -
3-38 -0123-Aug-2808:05:29 11817 302 -26250 P t- 1.4273 0.2010 71N 127W 0 - -
4-37 -0105-Sep-0816:12:50 11618 296 -26027 P t- 1.3882 0.2757 71N 97E 0 - -
5-36 -0087-Sep-1900:28:50 11422 291 -25804 P t- 1.3561 0.3370 72N 42W 0 - -
6-35 -0069-Sep-3008:52:29 11229 285 -25581 P t- 1.3301 0.3864 72N 177E 0 - -
7-34 -0051-Oct-1017:24:18 11039 280 -25358 P t- 1.3107 0.4233 72N 34E 0 - -
8-33 -0033-Oct-2202:03:09 10851 274 -25135 P t- 1.2968 0.4496 71N 110W 0 - -
9-32 -0015-Nov-0110:48:03 10667 269 -24912 P t- 1.2882 0.4659 70N 104E 0 - -
10-31 0003-Nov-1219:36:15 10484 264 -24689 P t- 1.2823 0.4770 70N 41W 0 - -
11-30 0021-Nov-2304:28:28 10304 259 -24466 P t- 1.2798 0.4818 69N 173E 0 - -
12-29 0039-Dec-0413:22:00 10125 253 -24243 P t- 1.2782 0.4848 68N 27E 0 - -
13-28 0057-Dec-1422:15:20 9949 248 -24020 P t- 1.2767 0.4879 66N 118W 0 - -
14-27 0075-Dec-2607:06:34 9774 243 -23797 P t- 1.2735 0.4940 65N 98E 0 - -
15-26 0094-Jan-0515:54:48 9600 238 -23574 P t- 1.2680 0.5044 64N 44W 0 - -
16-25 0112-Jan-1700:38:35 9427 233 -23351 P t- 1.2590 0.5215 64N 174E 0 - -
17-24 0130-Jan-2709:15:41 9255 228 -23128 P t- 1.2448 0.5486 63N 35E 0 - -
18-23 0148-Feb-0717:46:39 9084 224 -22905 P t- 1.2256 0.5852 62N 102W 0 - -
19-22 0166-Feb-1802:09:34 8913 219 -22682 P t- 1.2002 0.6338 62N 122E 0 - -
20-21 0184-Feb-2910:24:28 8742 214 -22459 P t- 1.1686 0.6945 61N 11W 0 - -
21-20 0202-Mar-1118:30:37 8571 209 -22236 P t- 1.1300 0.7686 61N 142W 0 - -
22-19 0220-Mar-2202:29:09 8400 205 -22013 P t- 1.0856 0.8541 61N 89E 0 - -
23-18 0238-Apr-0210:19:37 8229 200 -21790 P t- 1.0348 0.9521 61N 38W 0 - -
24-17 0256-Apr-1218:01:56 8057 196 -21567 T t- 0.9777 1.0522 63N 139W 11 86002m50s
25-16 0274-Apr-2401:38:10 7885 191 -21344 T p- 0.9160 1.0564 63N 125E 23 46303m14s
26-15 0292-May-0409:08:24 7711 187 -21121 T p- 0.8498 1.0586 64N 24E 31 36403m29s
27-14 0310-May-1516:34:45 7538 182 -20898 T p- 0.7805 1.0596 64N 76W 38 31303m41s
28-13 0328-May-2523:56:18 7363 178 -20675 T p- 0.7078 1.0596 63N 176W 45 27703m50s
29-12 0346-Jun-0607:17:07 7187 174 -20452 T p- 0.6347 1.0586 61N 83E 50 25003m58s
30-11 0364-Jun-1614:35:59 7011 169 -20229 T p- 0.5609 1.0566 57N 19W 56 22604m02s
31-10 0382-Jun-2721:55:24 6834 165 -20006 T p- 0.4879 1.0538 53N 123W 61 20404m03s
32 -9 0400-Jul-0805:15:51 6656 161 -19783 T p- 0.4164 1.0502 48N 130E 65 18304m00s
33 -8 0418-Jul-1912:39:34 6478 157 -19560 T n- 0.3482 1.0459 42N 20E 69 16303m52s
34 -7 0436-Jul-2920:07:21 6299 153 -19337 T n- 0.2843 1.0409 35N 91W 73 14303m37s
35 -6 0454-Aug-1003:38:53 6121 149 -19114 T n- 0.2244 1.0355 28N 155E 77 12203m17s
36 -5 0472-Aug-2011:17:17 5944 145 -18891 T nn 0.1711 1.0296 22N 38E 80 10202m50s
37 -4 0490-Aug-3119:01:13 5767 141 -18668 T nn 0.1233 1.0235 15N 79W 83 8102m19s
38 -3 0508-Sep-1102:52:52 5591 138 -18445 H3 nn 0.0827 1.0173 9N 160E 85 5901m45s
39 -2 0526-Sep-2210:50:08 5414 134 -18222 H nn 0.0477 1.0111 2N 39E 87 3801m08s
40 -1 0544-Oct-0218:55:54 5239 130 -17999 H nn 0.0206 1.0050 4S 84W 89 1700m31s
Catalog of Solar Eclipses of Saros 91
Seq Num Rel Num Calendar Date TD of Greatest Eclipse ΔT

s
ΔT Sigma
s
Luna Num Ecl Type QLE Gamma Ecl Mag Lat

°
Long

°
Sun Alt
°
Path Width km Central Dur
41 0 0562-Oct-1403:07:16 5065 126 -17776 A nn -0.0009 0.9992 9S 151E 90 300m05s
42 1 0580-Oct-2411:25:24 4892 123 -17553 A nn -0.0162 0.9938 14S 25E 89 2200m40s
43 2 0598-Nov-0419:48:07 4721 119 -17330 A nn -0.0270 0.9888 18S 101W 88 4001m13s
44 3 0616-Nov-1504:16:12 4551 116 -17107 A nn -0.0330 0.9843 21S 132E 88 5601m43s
45 4 0634-Nov-2612:45:53 4383 112 -16884 A nn -0.0368 0.9804 24S 4E 88 7002m09s
46 5 0652-Dec-0621:16:42 4216 109 -16661 A nn -0.0390 0.9771 25S 123W 88 8202m31s
47 6 0670-Dec-1805:46:37 4050 106 -16438 A nn -0.0415 0.9744 26S 111E 87 9202m49s
48 7 0688-Dec-2814:15:10 3887 102 -16215 A nn -0.0447 0.9723 26S 15W 87 9903m01s
49 8 0707-Jan-0822:38:02 3726 99 -15992 A nn -0.0519 0.9708 25S 140W 87 10503m09s
50 9 0725-Jan-1906:56:02 3567 96 -15769 A nn -0.0623 0.9696 23S 96E 86 10903m14s
51 10 0743-Jan-3015:05:46 3410 93 -15546 A nn -0.0791 0.9690 21S 26W 85 11203m15s
52 11 0761-Feb-0923:08:43 3256 90 -15323 A nn -0.1006 0.9686 19S 147W 84 11303m15s
53 12 0779-Feb-2107:00:00 3105 87 -15100 A nn -0.1312 0.9685 16S 95E 82 11403m14s
54 13 0797-Mar-0314:43:27 2957 84 -14877 A nn -0.1674 0.9685 14S 21W 80 11503m14s
55 14 0815-Mar-1422:14:54 2813 81 -14654 A -n -0.2127 0.9684 12S 134W 78 11603m15s
56 15 0833-Mar-2505:37:42 2672 78 -14431 A -n -0.2644 0.9683 10S 115E 75 11703m18s
57 16 0851-Apr-0512:48:48 2534 75 -14208 A -p -0.3250 0.9680 9S 8E 71 12103m25s
58 17 0869-Apr-1519:52:31 2401 72 -13985 A -p -0.3908 0.9674 9S 98W 67 12603m35s
59 18 0887-Apr-2702:46:21 2271 70 -13762 A -p -0.4640 0.9664 10S 158E 62 13503m49s
60 19 0905-May-0709:33:15 2146 67 -13539 A -p -0.5421 0.9649 13S 56E 57 14904m07s
61 20 0923-May-1816:13:25 2025 64 -13316 A -p -0.6246 0.9629 17S 45W 51 17004m28s
62 21 0941-May-2822:49:26 1908 62 -13093 A -p -0.7095 0.9603 22S 145W 45 20304m49s
63 22 0959-Jun-0905:21:57 1796 59 -12870 A -p -0.7965 0.9569 29S 115E 37 25905m06s
64 23 0977-Jun-1911:52:06 1688 57 -12647 A -t -0.8843 0.9526 39S 14E 28 37305m16s
65 24 0995-Jun-3018:22:37 1585 54 -12424 A -t -0.9708 0.9465 54S 88W 13 85305m11s
66 25 1013-Jul-1100:53:51 1486 52 -12201 P -t -1.0554 0.8699 68S 163E 0 - -
67 26 1031-Jul-2207:27:42 1392 50 -11978 P -t -1.1368 0.7288 69S 52E 0 - -
68 27 1049-Aug-0114:05:37 1303 47 -11755 P -t -1.2141 0.5958 70S 60W 0 - -
69 28 1067-Aug-1220:49:34 1218 45 -11532 P -t -1.2857 0.4735 71S 174W 0 - -
70 29 1085-Aug-2303:40:33 1138 43 -11309 P -t -1.3505 0.3636 71S 70E 0 - -
71 30 1103-Sep-0310:38:16 1062 41 -11086 P -t -1.4093 0.2647 72S 49W 0 - -
72 31 1121-Sep-1317:45:15 991 39 -10863 P -t -1.4600 0.1803 72S 170W 0 - -
73 32 1139-Sep-2501:00:34 923 37 -10640 P -t -1.5037 0.1082 72S 67E 0 - -
74 33 1157-Oct-0508:25:10 860 35 -10417 P -t -1.5396 0.0495 72S 59W 0 - -
75 34 1175-Oct-1615:57:42 801 33 -10194 Pe -t -1.5689 0.0021 71S 174E 0 - -

Statistics for Solar Eclipses of Saros 91

Solar eclipses of Saros 91 all occur at the Moon’s ascending node and the Moon moves southward with each eclipse. The series began with a partial eclipse in the northern hemisphere on -0159 Aug 06. The series ended with a partial eclipse in the southern hemisphere on 1175 Oct 16. The total duration of Saros series 91 is 1334.23 years.

Summary of Saros 91
First Eclipse -0159 Aug 06
Last Eclipse 1175 Oct 16
Series Duration 1334.23 Years
No. of Eclipses 75
Sequence 23P 14T 3H 25A 10P

Saros 91 is composed of 75 solar eclipses as follows:

Solar Eclipses of Saros 91
Eclipse Type Symbol Number Percent
All Eclipses - 75100.0%
PartialP 33 44.0%
AnnularA 25 33.3%
TotalT 14 18.7%
HybridH 3 4.0%

Umbral eclipses (annular, total and hybrid) can be further classified as either: 1) Central (two limits), 2) Central (one limit) or 3) Non-Central (one limit). The statistical distribution of these classes in Saros series 91 appears in the following table.

Umbral Eclipses of Saros 91
Classification Number Percent
All Umbral Eclipses 42100.0%
Central (two limits) 42100.0%
Central (one limit) 0 0.0%
Non-Central (one limit) 0 0.0%

The 75 eclipses in Saros 91 occur in the following order : 23P 14T 3H 25A 10P

The longest and shortest central eclipses of Saros 91 as well as largest and smallest partial eclipses appear below.

Extreme Durations and Magnitudes of Solar Eclipses of Saros 91
Extrema Type Date Duration Magnitude
Longest Annular Solar Eclipse 0977 Jun 1905m16s -
Shortest Annular Solar Eclipse 0562 Oct 1400m05s -
Longest Total Solar Eclipse 0382 Jun 2704m03s -
Shortest Total Solar Eclipse 0490 Aug 3102m19s -
Longest Hybrid Solar Eclipse 0508 Sep 1101m45s -
Shortest Hybrid Solar Eclipse 0544 Oct 0200m31s -
Largest Partial Solar Eclipse 0238 Apr 02 - 0.95206
Smallest Partial Solar Eclipse 1175 Oct 16 - 0.00206

Links to Additional Solar Eclipse Predictions

Calendar

The Gregorian calendar (also called the Western calendar) is internationally the most widely used civil calendar. It is named for Pope Gregory XIII, who introduced it in 1582. On this website, the Gregorian calendar is used for all calendar dates from 1582 Oct 15 onwards. Before that date, the Julian calendar is used. For more information on this topic, see Calendar Dates.

The Julian calendar does not include the year 0. Thus the year 1 BCE is followed by the year 1 CE (See: BCE/CE Dating Conventions). This is awkward for arithmetic calculations. Years in this catalog are numbered astronomically and include the year 0. Historians should note there is a difference of one year between astronomical dates and BCE dates. Thus, the astronomical year 0 corresponds to 1 BCE, and astronomical year -1 corresponds to 2 BCE, etc..

Eclipse Predictions

The eclipse predictions presented here were generated using the JPL DE406 solar and lunar ephemerides. The lunar coordinates have been calculated with respect to the Moon's Center of Mass.

The largest uncertainty in the eclipse predictions is caused by fluctuations in Earth's rotation due primarily to tidal friction of the Moon. The resultant drift in apparent clock time is expressed as ΔT and is determined as follows:

  1. pre-1950's: ΔT calculated from empirical fits to historical records derived by Morrison and Stephenson (2004)
  2. 1955-present: ΔT obtained from published observations
  3. future: ΔT is extrapolated from current values weighted by the long term trend from tidal effects

A series of polynomial expressions have been derived to simplify the evaluation of ΔT for any time from -2999 to +3000. The uncertainty in ΔT over this period can be estimated from scatter in the measurements.

Acknowledgments

Some of the content on this web site is based on the books Five Millennium Canon of Solar Eclipses: -1999 to +3000 and Thousand Year Canon of Solar Eclipses 1501 to 2500. All eclipse calculations are by Fred Espenak, and he assumes full responsibility for their accuracy.

Permission is granted to reproduce data from this page when accompanied by an acknowledgment:

"Eclipse Predictions by Fred Espenak, www.EclipseWise.com"

The use of diagrams and maps is permitted provided that they are NOT altered (except for re-sizing) and the embedded credit line is NOT removed or covered.