Solar Eclipse Prime Page

Annular Solar Eclipse of 2085 Dec 16

Fred Espenak

Introduction

The Annular Solar Eclipse of 2085 Dec 16 is visible from the following geographic regions:

  • Partial Eclipse: Australia, North America
  • Annular Eclipse: central Pacific

The map to the right depicts the geographic regions of eclipse visibility. 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 2085 Dec 16 at 22:37:48 TD (22:35:55 UT1). This is 3.7 days before the Moon reaches perigee. During the eclipse, the Sun is in the constellation Ophiuchus. The synodic month in which the eclipse takes place has a Brown Lunation Number of 2016.

The eclipse belongs to Saros 143 and is number 27 of 72 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 2085 Dec 16 is a very short annular eclipse with a duration at greatest eclipse of 00m19s. It has an eclipse magnitude of 0.9971.

The annular solar eclipse of 2085 Dec 16 is preceded two weeks earlier by a penumbral lunar eclipse on 2085 Dec 01.

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 113.2 seconds for this eclipse.

The following links provide maps and data for the eclipse.

The tables below contain detailed predictions and additional information on the Annular Solar Eclipse of 2085 Dec 16 .

Eclipse Data: Annular Solar Eclipse of 2085 Dec 16

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 0.99714
Eclipse Obscuration 0.99428
Gamma 0.27864
Conjunction Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 2085 Dec 16 at 22:37:47.8 TD (22:35:54.6 UT1) 2482941.441604
Ecliptic Conjunction 2085 Dec 16 at 22:40:48.4 TD (22:38:55.2 UT1) 2482941.443694
Equatorial Conjunction 2085 Dec 16 at 22:39:48.7 TD (22:37:55.5 UT1) 2482941.443003
Geocentric Coordinates of Sun and Moon
2085 Dec 16 at 22:37:47.8 TD (22:35:54.6 UT1)
Coordinate Sun Moon
Right Ascension17h41m09.8s17h41m05.1s
Declination-23°21'25.3"-23°05'11.3"
Semi-Diameter 16'15.0" 15'57.1"
Eq. Hor. Parallax 08.9" 0°58'32.5"
Geocentric Libration of Moon
Angle Value
l -4.6°
b -0.3°
c 3.4°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE406
ΔT 113.2 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 143 (27/72)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Annular Solar Eclipse of 2085 Dec 16

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD		 Time
UT1		 Latitude Longitude
First External ContactP119:52:02.919:50:09.706°04.3'N154°05.3'E
First Internal ContactP221:59:46.921:57:53.631°39.1'N134°58.2'E
Last Internal ContactP323:15:46.823:13:53.638°20.7'N099°26.5'W
Last External ContactP401:23:25.801:21:32.613°05.4'N117°08.0'W
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD		 Time
UT1		 Latitude Longitude
North Extreme Path Limit 1N121:29:23.721:27:30.446°29.8'N154°11.4'E
South Extreme Path Limit 1S121:03:14.021:01:20.717°38.0'S125°46.5'E
North Extreme Path Limit 2N223:46:06.323:44:13.152°30.7'N121°18.9'W
South Extreme Path Limit 2S200:12:22.100:10:28.910°37.2'S088°57.8'W

Explanation of Penumbral Shadow Contacts and Extremes Tables

Umbral Shadow Contacts and Extremes: Annular Solar Eclipse of 2085 Dec 16

Contacts of Umbral Shadow with Earth
Contact Event Contact Time
TD		 Time
UT1		 Latitude Longitude
First External ContactU120:52:55.220:51:01.911°20.9'N141°12.8'E
First Internal ContactU220:54:09.720:52:16.411°30.9'N140°58.7'E
Last Internal ContactU300:21:26.600:19:33.418°29.6'N104°11.0'W
Last External ContactU400:22:35.600:20:42.418°20.3'N104°23.7'W
Extreme Northern and Southern Path Limits of Umbra
Contact Event Contact Time
TD		 Time
UT1		 Latitude Longitude
North Extreme Path Limit 1N120:53:36.020:51:42.711°43.6'N141°12.8'E
South Extreme Path Limit 1S120:53:28.920:51:35.711°08.1'N140°58.6'E
North Extreme Path Limit 2N200:21:57.800:20:04.618°41.3'N104°24.4'W
South Extreme Path Limit 2S200:22:04.400:20:11.218°08.6'N104°10.3'W

Explanation of Umbral Shadow Contacts and Extremes Tables

Central Line Extremes and Duration: Annular Solar Eclipse of 2085 Dec 16

Extreme Limits of the Central Line
Contact Event Contact Time
TD		 Time
UT1		 Latitude Longitude
Extreme Central Line Limit 1C120:53:32.420:51:39.211°25.9'N141°05.7'E
Extreme Central Line Limit 2C200:22:01.100:20:07.918°24.9'N104°17.3'W

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 Eclipse22:37:47.822:35:54.607°15.5'S161°30.9'W 73.9° 176.5° 10.4 km00m19.20s
Greatest Duration20:53:32.420:51:39.211°25.9'N141°05.7'E 0.0° 113.9° 70.3 km01m14.14s

Explanation of Greatest Eclipse and Greatest Duration

Polynomial Besselian Elements: Annular Solar Eclipse of 2085 Dec 16

Polynomial Besselian Elements
2085 Dec 16 at 23:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 0.18553 0.29164 -23.3583 0.55146 0.00528 165.9942
1 0.55139 0.03684 -0.0015 -0.00013 -0.00013 14.9964
2 -0.00000 0.00016 0.0000 -0.00001 -0.00001 -0.0000
3 -0.00001 -0.00000 - - - -
Tan ƒ1 0.0047508
Tan ƒ2 0.0047272

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 2085 Dec 16

Links to Additional Solar Eclipse Information

Eclipse Predictions

Predictions for the Annular Solar Eclipse of 2085 Dec 16 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 113.2 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.