Saros 81

Catalog of Lunar Eclipses of Saros 81

Fred Espenak

Introduction

The periodicity and recurrence of lunar 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 penumbral lunar eclipses. The series will then produce several dozen partial eclipses, followed by several dozen total eclipses. The later portion of the series produces another set of partial eclipses before ending with a final group of penumbral eclipses.

Catalog of Lunar Eclipses of Saros 81

The table below lists the concise characteristics of every lunar eclipse belonging to Saros 81 . 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 along with a diagram of the eclipse geometry 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 Lunar Eclipses.

Catalog of Lunar Eclipses of Saros 81
Seq Num Rel Num Calendar Date TD of Greatest Eclipse ΔT

s
ΔT Sigma
s
Luna Num Ecl Type QSE Gamma Pen Mag Um Mag Pen Dur
m
Par Dur
m
Tot Dur
m
1-35 -0020-Feb-1920:49:04 10725 271 -24983 Nb t- -1.5751 0.0140-1.0772 37.0 - -
2-34 -0002-Mar-0204:02:00 10542 266 -24760 N t- -1.5313 0.0924-0.9949 94.4 - -
3-33 0016-Mar-1211:07:58 10361 260 -24537 N t- -1.4813 0.1820-0.9013131.2 - -
4-32 0034-Mar-2318:02:27 10182 255 -24314 N t- -1.4217 0.2893-0.7899163.6 - -
5-31 0052-Apr-0300:51:37 10004 250 -24091 N t- -1.3570 0.4060-0.6692191.4 - -
6-30 0070-Apr-1407:31:40 9829 245 -23868 N t- -1.2846 0.5370-0.5343217.0 - -
7-29 0088-Apr-2414:07:28 9655 240 -23645 N t- -1.2077 0.6762-0.3915239.7 - -
8-28 0106-May-0520:37:19 9482 235 -23422 N t- -1.1251 0.8261-0.2383260.4 - -
9-27 0124-May-1603:05:56 9309 230 -23199 N t- -1.0406 0.9795-0.0818278.4 - -
10-26 0142-May-2709:32:30 9138 225 -22976 P t- -0.9535 1.1381 0.0794294.4 68.3 -
11-25 0160-Jun-0615:59:10 8967 220 -22753 P t- -0.8653 1.2987 0.2423308.2116.3 -
12-24 0178-Jun-1722:27:32 8796 216 -22530 P t- -0.7778 1.4584 0.4037319.8146.3 -
13-23 0196-Jun-2804:59:44 8625 211 -22307 P t- -0.6926 1.6140 0.5607329.5167.8 -
14-22 0214-Jul-0911:36:37 8454 206 -22084 P t- -0.6101 1.7649 0.7126337.3184.0 -
15-21 0232-Jul-1918:19:37 8283 202 -21861 P t- -0.5319 1.9081 0.8565343.4196.2 -
16-20 0250-Jul-3101:10:42 8111 197 -21638 P t- -0.4593 2.0412 0.9898348.1205.3 -
17-19 0268-Aug-1008:10:44 7939 193 -21415 T t- -0.3934 2.1620 1.1106351.4212.0 52.2
18-18 0286-Aug-2115:19:19 7766 188 -21192 T t- -0.3337 2.2716 1.2201353.7216.7 70.8
19-17 0304-Aug-3122:38:24 7593 184 -20969 T p- -0.2818 2.3671 1.3153355.1220.0 81.6
20-16 0322-Sep-1206:07:56 7418 179 -20746 T- p- -0.2374 2.4487 1.3965355.8222.1 88.5
21-15 0340-Sep-2213:48:35 7243 175 -20523 T- p- -0.2016 2.5145 1.4621356.0223.3 92.7
22-14 0358-Oct-0321:38:04 7067 171 -20300 T- p- -0.1721 2.5687 1.5162355.7223.9 95.5
23-13 0376-Oct-1405:38:18 6890 167 -20077 T- p- -0.1506 2.6079 1.5557355.2224.0 97.1
24-12 0394-Oct-2513:46:50 6712 162 -19854 T- p- -0.1350 2.6363 1.5846354.4223.9 98.0
25-11 0412-Nov-0422:03:09 6534 158 -19631 T- p- -0.1250 2.6541 1.6035353.4223.6 98.4
26-10 0430-Nov-1606:24:40 6356 154 -19408 T- p- -0.1185 2.6653 1.6163352.3223.2 98.6
27 -9 0448-Nov-2614:51:03 6178 150 -19185 T- p- -0.1151 2.6704 1.6235351.1222.7 98.7
28 -8 0466-Dec-0723:19:53 6000 146 -18962 T- p- -0.1131 2.6727 1.6286349.8222.1 98.6
29 -7 0484-Dec-1807:48:55 5823 143 -18739 T- p- -0.1103 2.6760 1.6354348.5221.7 98.7
30 -6 0502-Dec-2916:17:33 5647 139 -18516 T- p- -0.1064 2.6811 1.6445347.1221.2 98.8
31 -5 0521-Jan-0900:43:30 5470 135 -18293 T- p- -0.0995 2.6915 1.6596345.7220.9 99.1
32 -4 0539-Jan-2009:05:20 5294 131 -18070 T- p- -0.0885 2.7091 1.6823344.2220.6 99.5
33 -3 0557-Jan-3017:21:18 5120 128 -17847 T- pp -0.0719 2.7368 1.7156342.8220.4100.1
34 -2 0575-Feb-1101:32:00 4947 124 -17624 T- pp -0.0500 2.7740 1.7587341.3220.2100.7
35 -1 0593-Feb-2109:36:03 4775 120 -17401 T- pp -0.0215 2.8231 1.8140339.8220.0101.2
36 0 0611-Mar-0417:32:21 4605 117 -17178 T+ pp 0.0142 2.8333 1.8304338.2219.5101.2
37 1 0629-Mar-1501:22:10 4436 113 -16955 T+ pp 0.0561 2.7535 1.7567336.3218.7100.5
38 2 0647-Mar-2609:04:54 4268 110 -16732 T+ pp 0.1047 2.6612 1.6705334.1217.4 98.7
39 3 0665-Apr-0516:41:53 4102 107 -16509 T+ pp 0.1590 2.5586 1.5738331.5215.4 95.3
40 4 0683-Apr-1700:12:00 3938 103 -16286 T+ -p 0.2199 2.4440 1.4647328.4212.5 89.6
Catalog of Lunar Eclipses of Saros 81
Seq Num Rel Num Calendar Date TD of Greatest Eclipse ΔT

s
ΔT Sigma
s
Luna Num Ecl Type QSE Gamma Pen Mag Um Mag Pen Dur
m
Par Dur
m
Tot Dur
m
41 5 0701-Apr-2707:38:40 3776 100 -16063 T -p 0.2845 2.3229 1.3486324.7208.5 80.9
42 6 0719-May-0815:00:54 3617 97 -15840 T -p 0.3533 2.1944 1.2247320.2203.3 67.6
43 7 0737-May-1822:20:41 3459 94 -15617 T -a 0.4249 2.0610 1.0954315.0196.6 45.8
44 8 0755-May-3005:38:52 3305 91 -15394 P -a 0.4984 1.9244 0.9622309.0188.4 -
45 9 0773-Jun-0912:57:12 3153 88 -15171 P -a 0.5723 1.7875 0.8281302.2178.5 -
46 10 0791-Jun-2020:16:55 3004 85 -14948 P -a 0.6454 1.6521 0.6949294.6166.8 -
47 11 0809-Jul-0103:37:50 2858 82 -14725 P -a 0.7181 1.5180 0.5624286.3152.9 -
48 12 0827-Jul-1211:03:31 2716 79 -14502 P -a 0.7870 1.3911 0.4363277.6137.0 -
49 13 0845-Jul-2218:33:04 2577 76 -14279 P -a 0.8531 1.2697 0.3153268.4118.3 -
50 14 0863-Aug-0302:09:28 2443 73 -14056 P -a 0.9140 1.1581 0.2034259.1 96.4 -
51 15 0881-Aug-1309:51:16 2312 70 -13833 P -a 0.9707 1.0543 0.0990249.6 68.1 -
52 16 0899-Aug-2417:42:14 2185 68 -13610 P -a 1.0204 0.9638 0.0073240.7 18.7 -
53 17 0917-Sep-0401:39:56 2063 65 -13387 N -a 1.0648 0.8831-0.0749232.1 - -
54 18 0935-Sep-1509:46:24 1944 63 -13164 N -a 1.1025 0.8148-0.1449224.4 - -
55 19 0953-Sep-2518:00:24 1831 60 -12941 N -a 1.1343 0.7573-0.2043217.4 - -
56 20 0971-Oct-0702:23:42 1722 58 -12718 N -a 1.1592 0.7126-0.2510211.8 - -
57 21 0989-Oct-1710:53:50 1617 55 -12495 N -a 1.1786 0.6780-0.2874207.2 - -
58 22 1007-Oct-2819:30:55 1517 53 -12272 N -a 1.1928 0.6528-0.3144203.8 - -
59 23 1025-Nov-0804:13:48 1422 50 -12049 N -a 1.2025 0.6357-0.3329201.4 - -
60 24 1043-Nov-1913:02:11 1331 48 -11826 N -a 1.2084 0.6256-0.3443200.0 - -
61 25 1061-Nov-2921:52:52 1245 46 -11603 N -a 1.2125 0.6184-0.3522199.0 - -
62 26 1079-Dec-1106:45:57 1163 44 -11380 N -a 1.2150 0.6141-0.3569198.4 - -
63 27 1097-Dec-2115:38:32 1086 42 -11157 N -a 1.2182 0.6082-0.3628197.6 - -
64 28 1116-Jan-0200:31:00 1013 40 -10934 N -a 1.2216 0.6016-0.3689196.7 - -
65 29 1134-Jan-1209:18:51 944 38 -10711 N -a 1.2293 0.5872-0.3824194.6 - -
66 30 1152-Jan-2318:04:06 880 36 -10488 N -a 1.2392 0.5684-0.4001191.9 - -
67 31 1170-Feb-0302:42:27 819 34 -10265 N -a 1.2550 0.5386-0.4283187.4 - -
68 32 1188-Feb-1411:15:27 763 32 -10042 N -a 1.2751 0.5008-0.4645181.5 - -
69 33 1206-Feb-2419:39:18 710 30 -9819 N -a 1.3030 0.4489-0.5146172.8 - -
70 34 1224-Mar-0703:57:04 660 28 -9596 N -a 1.3356 0.3881-0.5737161.7 - -
71 35 1242-Mar-1812:05:30 614 27 -9373 N -a 1.3760 0.3132-0.6470146.5 - -
72 36 1260-Mar-2820:06:04 571 25 -9150 N -a 1.4224 0.2273-0.7315125.9 - -
73 37 1278-Apr-0903:57:59 530 23 -8927 N -a 1.4755 0.1295-0.8283 96.0 - -
74 38 1296-Apr-1911:43:01 493 22 -8704 Ne -a 1.5336 0.0224-0.9347 40.4 - -

Statistics for Lunar Eclipses of Saros 81

Lunar eclipses of Saros 81 all occur at the Moon’s descending node and the Moon moves northward with each eclipse. The series will begin with a penumbral eclipse near the southern edge of the penumbra on -0020 Feb 19. The series will end with a penumbral eclipse near the northern edge of the penumbra on 1296 Apr 19. The total duration of Saros series 81 is 1316.20 years.

Summary of Saros 81
First Eclipse -0020 Feb 19
Last Eclipse 1296 Apr 19
Series Duration 1316.20 Years
No. of Eclipses 74
Sequence 9N 7P 27T 9P 22N

Saros 81 is composed of 74 lunar eclipses as follows:

Lunar Eclipses of Saros 81
Eclipse Type Symbol Number Percent
All Eclipses - 74100.0%
PenumbralN 31 41.9%
PartialP 16 21.6%
TotalT 27 36.5%

The 74 lunar eclipses of Saros 81 occur in the order of 9N 7P 27T 9P 22N which corresponds to the following.

Sequence Order of Lunar Eclipses in Saros 81
Eclipse Type Symbol Number
Penumbral N 9
Partial P 7
Total T 27
Partial P 9
Penumbral N 22

The longest and shortest eclipses of Saros 81 as well as largest and smallest partial eclipses appear below.

Extreme Durations and Magnitudes of Lunar Eclipses of Saros 81
Extrema Type Date Duration Magnitude
Longest Total Lunar Eclipse 0611 Mar 0401h41m14s -
Shortest Total Lunar Eclipse 0737 May 1800h45m49s -
Longest Partial Lunar Eclipse 0250 Jul 3103h25m21s -
Shortest Partial Lunar Eclipse 0899 Aug 2400h18m40s -
Longest Penumbral Lunar Eclipse 0124 May 1604h38m26s -
Shortest Penumbral Lunar Eclipse -0020 Feb 1900h36m59s -
Largest Partial Lunar Eclipse 0250 Jul 31 - 0.98980
Smallest Partial Lunar Eclipse 0899 Aug 24 - 0.00728

Links to Additional Lunar 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 Lunar Eclipses: -1999 to +3000 and Thousand Year Canon of Lunar Eclipses 1501 to 2500. All eclipse calculations are by Fred Espenak, and he assumes full responsibility for their accuracy.

Permission is granted to reproduce eclipse data when accompanied by a link to this page and 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.