Solar Eclipse Prime Page

Annular Solar Eclipse of 2177 Jan 29

Fred Espenak

Introduction

The Annular Solar Eclipse of 2177 Jan 29 is visible from the geographic regions shown on the map to the right. Click on the map to enlarge it. For an explanation of the features appearing in the map, see Key to Solar Eclipse Maps.

The instant of greatest eclipse takes place on 2177 Jan 29 at 22:30:30 TD (22:26:40 UT1). This is 3.9 days after the Moon reaches apogee. During the eclipse, the Sun is in the constellation Capricornus. The synodic month in which the eclipse takes place has a Brown Lunation Number of 3143.

The eclipse belongs to Saros 153 and is number 18 of 70 eclipses in the series. All eclipses in this series occur at the Moon’s ascending node. The Moon moves southward with respect to the node with each succeeding eclipse in the series and gamma decreases.

The solar eclipse of 2177 Jan 29 is a relatively long annular eclipse with a duration at greatest eclipse of 06m55s. It has an eclipse magnitude of 0.9212. This annular eclipse is unsual in that it does NOT have a northern path limit. Instead, one edge of the antumbral shadow falls off into space throughout the eclipse. Gamma has a value of 0.9897.

The annular solar eclipse of 2177 Jan 29 is preceded two weeks earlier by a partial lunar eclipse on 2177 Jan 14.

These eclipses all take place during a single eclipse season.

The eclipse predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 230.4 seconds for this eclipse.

The following links provide maps and data for the eclipse.

Orthographic Map: Annular Solar Eclipse of 2177 Jan 29 - global map of eclipse visibility
Google Map: Annular Solar Eclipse of 2177 Jan 29 - interactive map of the eclipse path
Path Table: Annular Solar Eclipse of 2177 Jan 29 - coordinates of the central line and path limits
Circumstances Table: Annular Solar Eclipse of 2177 Jan 29 - eclipse times for hundreds of cities
Saros 153 Table - data for all eclipses in the Saros series

The tables below contain detailed predictions and additional information on the Annular Solar Eclipse of 2177 Jan 29 .

Eclipse Data: Annular Solar Eclipse of 2177 Jan 29

Eclipse Characteristics
Parameter	Value
Eclipse Magnitude	0.92122
Eclipse Obscuration	0.84865
Gamma	0.98967

Conjunction Times
Event	Calendar Date and Time	Julian Date
Greatest Eclipse	2177 Jan 29 at 22:30:30.4 TD (22:26:40.0 UT1)	2516222.435185
Ecliptic Conjunction	2177 Jan 29 at 22:41:57.6 TD (22:38:07.3 UT1)	2516222.443140
Equatorial Conjunction	2177 Jan 29 at 23:15:43.6 TD (23:11:53.2 UT1)	2516222.466588

Geocentric Coordinates of Sun and Moon
2177 Jan 29 at 22:30:30.4 TD (22:26:40.0 UT1)
Coordinate	Sun	Moon
Right Ascension	20h51m19.0s	20h49m56.7s
Declination	-17°37'17.4"	-16°46'51.7"
Semi-Diameter	16'14.4"	14'56.4"
Eq. Hor. Parallax	08.9"	0°54'49.8"

Geocentric Libration of Moon
Angle	Value
l	-3.6°
b	-1.1°
c	-14.0°

Prediction Parameters
Paramater	Value
Ephemerides	JPL DE406
ΔT	230.4 s
k (penumbra)	0.2725076
k (umbra)	0.2722810
Saros Series	153 (18/70)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Annular Solar Eclipse of 2177 Jan 29

Contacts of Penumbral Shadow with Earth
Contact Event	Contact	Time TD	Time UT1	Latitude	Longitude
First External Contact	P1	20:07:51.5	20:04:01.1	17°00.2'N	157°47.9'E
Last External Contact	P4	00:52:46.5	00:48:56.1	56°10.6'N	127°15.9'W

Extreme Northern and Southern Path Limits of Penumbra
Contact Event	Contact	Time TD	Time UT1	Latitude	Longitude
North Extreme Path Limit 1	N1	20:54:20.9	20:50:30.6	03°42.5'N	141°46.4'E
South Extreme Path Limit 1	S1	00:06:24.4	00:02:34.1	43°58.2'N	105°14.8'W

Explanation of Penumbral Shadow Contacts and Extremes Tables

Umbral Shadow Contacts and Extremes: Annular Solar Eclipse of 2177 Jan 29

Contacts of Umbral Shadow with Earth
Contact Event	Contact	Time TD	Time UT1	Latitude	Longitude
First External Contact	U1	22:00:40.4	21:56:50.0	50°47.8'N	146°56.5'E
Last External Contact	U4	22:59:49.9	22:55:59.6	71°03.4'N	176°55.7'E

Extreme Northern and Southern Path Limits of Umbra
Contact Event	Contact	Time TD	Time UT1	Latitude	Longitude
North Extreme Path Limit 1	N1	22:01:09.7	21:57:19.3	50°38.9'N	146°41.4'E
South Extreme Path Limit 1	S1	22:59:20.5	22:55:30.2	71°06.9'N	177°31.2'E

Explanation of Umbral Shadow Contacts and Extremes Tables

Central Line Extremes and Duration: Annular Solar Eclipse of 2177 Jan 29

Extreme Limits of the Central Line
Contact Event	Contact	Time TD	Time UT1	Latitude	Longitude
Extreme Central Line Limit 1	C1	22:15:46.3	22:11:56.0	56°56.7'N	149°27.7'E
Extreme Central Line Limit 2	C2	22:44:45.6	22:40:55.3	67°29.8'N	163°02.8'E

Explanation of Central Line Extremes Table

Greatest Eclipse and Greatest Duration
Event	Time TD	Time UT1	Latitude	Longitude	Sun Altitude	Sun Azimuth	Path Width	Central Duration
Greatest Eclipse	22:30:30.4	22:26:40.0	57°35.5'N	163°32.0'E	7.1°	140.0°	2315.2 km	06m55.09s
Greatest Duration	22:29:47.1	22:25:56.7	57°21.9'N	164°10.3'E	7.1°	139.5°	2341.6 km	06m55.11s

Explanation of Greatest Eclipse and Greatest Duration

Polynomial Besselian Elements: Annular Solar Eclipse of 2177 Jan 29

Polynomial Besselian Elements
2177 Jan 29 at 23:00:00.0 TD (=t0)
n	x	y	d	l1	l2	μ
0	-0.12516	1.01357	-17.6184	0.57019	0.02391	161.7821
1	0.47750	0.18647	0.0110	-0.00009	-0.00009	14.9995
2	-0.00002	0.00007	0.0000	-0.00001	-0.00001	0.0000
3	-0.00001	-0.00000	-	-	-	-

Tan ƒ1	0.0047487
Tan ƒ2	0.0047251

At time t1 (decimal hours), each besselian element is evaluated by:

x = x0 + x1*t + x2*t² + x3*t³ (or x = Σ [xn*tⁿ]; n = 0 to 3)

where: t = t1 - t0 (decimal hours) and t0 = 23.000

Explanation of Polynomial Besselian Elements

Links for the Annular Solar Eclipse of 2177 Jan 29

Orthographic Map: Annular Solar Eclipse of 2177 Jan 29 - global map of eclipse visibility
Google Map: Annular Solar Eclipse of 2177 Jan 29 - interactive map of the eclipse path
Path Table: Annular Solar Eclipse of 2177 Jan 29 - coordinates of the central line and path limits
Circumstances Table: Annular Solar Eclipse of 2177 Jan 29 - eclipse times for hundreds of cities
Saros 153 Table - data for all eclipses in the Saros series
Annular Solar Eclipse of 2177 Jan 29 - Google search for links to this eclipse

Links to Additional Solar Eclipse Information

Home - home page of EclipseWise with predictions for both solar and lunar eclipses

Solar Eclipses - primary page for solar eclipse predictions
Solar Eclipse Links - detailed directory of links

Six Millennium Catalog of Solar Eclipses - covers the years -2999 to +3000 (3000 BCE to 3000 CE)
Saros Catalog of Solar Eclipses - covers Saros series -30 through 190
World Atlas of Solar Eclipse Maps - index page
Solar Eclipse Search Engine - search for solar eclipses from -1999 to +3000
Javascript Solar Eclipse Explorer - calculate all solar eclipses visible from a city

Thousand Year Canon of Solar Eclipses 1501 to 2500 - link to the publication

MrEclipse.com - eclipse resources and tips on photography
Solar Eclipses for Beginners - a primer on solar eclipse basics
MrEclipse Photo Index - an index of solar eclipse photographs

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

Predictions for the Annular Solar Eclipse of 2177 Jan 29 were generated using the JPL DE406 solar and lunar ephemerides. The lunar coordinates were calculated with respect to the Moon's Center of Mass. The predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 230.4 seconds for this eclipse.

Acknowledgments

Some of the content on this website is based on the book 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 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.