Mars Ephemeris Calculator
Based on the NASA/JPL DE405 Ephemeris Model
PHP Program By Jay Tanner
Date: (1600 to 2200) Y m d
Local Time (00h to 24h) H:M:S
Local Time Zone Offset ±H:M
Undefined1
Std. Time = UT
Apply ΔT
+00:00:00
Daylight / Summer Time
Undefined3
Longitude ±Deg.d M S
(Neg=W)
Latitude ±Deg.d M S
(Neg=S)
Sea Level Elevation
(± meters)
This program uses a cookie to store and remember the interface settings between calls.
Mars Ephemeris Statistics Referred to True Ecliptic and Equinox of Date Based on the NASA/JPL DE405 Ephemeris Model Local Date = 2025 Aug 31 - Sun Local Time = 06:01:48 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460918.75125000 =========================================================================== Geocentric Equatorial Coordinates of Mars Right Ascension = 12h 57m 13.89s = 12.9538587h = 194.3078805° Declination = -05° 50' 05.64" = -5.834899° True Distance = 2.259671329 AU = 338.042019 Mkm = 210.049573 Mmi Visual Magnitude = +1.6 Angular Diameter = 2.974" Horizontal Parallax = 3.892" = 0.064863' = 0.001081051° Light/Signal Time = 18m 47.59s =========================================================================== Local Topocentric Coordinates of Mars For Geographic Location: Longitude = -76.833611111° = -05h 07m 20.1s (W=Negative) Latitude = +42.752194444° Elevation = 0 m Topocentric RA = 12h 57m 13.82s = 12.9538396h = 194.3075939° Topocentric Decl = -05° 50' 07.98" = -5.835550° Local Hour Angle = +10h 35m 56.08s = 158.98365517325° (W=Negative) Local Sidereal Time = 23h 33m 09.900s = 23.552749937h = 353.291249060° Azimuth = 147.29973° (Measured clockwise from S=0°) = 327.29973° (Measured clockwise from N=0°) Direction = NNW Altitude = -48.66984° (Invisible - Below Local Horizon) =========================================================================== Mars Ephemeris Table For Each Day Of Aug. 2025 at 12:00 TT There are three extra (xx) padding days at each end of the table. JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day 2460886 11.6966753 +02.673371 2.104392727 +1.6 xx 2460887 11.7339413 +02.418617 2.109945366 +1.6 xx 2460888 11.7712643 +02.163291 2.115445757 +1.6 xx 2460889 11.8086454 +01.907420 2.120893979 +1.6 1 2460890 11.8460855 +01.651028 2.126290148 +1.6 2 2460891 11.8835855 +01.394141 2.131634415 +1.6 3 2460892 11.9211465 +01.136786 2.136926963 +1.6 4 2460893 11.9587692 +00.878988 2.142168006 +1.6 5 2460894 11.9964547 +00.620774 2.147357788 +1.6 6 2460895 12.0342039 +00.362171 2.152496576 +1.6 7 2460896 12.0720178 +00.103204 2.157584653 +1.6 8 2460897 12.1098977 -00.156103 2.162622300 +1.6 9 2460898 12.1478451 -00.415725 2.167609783 +1.6 10 2460899 12.1858620 -00.675642 2.172547322 +1.6 11 2460900 12.2239507 -00.935835 2.177435078 +1.6 12 2460901 12.2621136 -01.196286 2.182273126 +1.6 13 2460902 12.3003534 -01.456978 2.187061454 +1.6 14 2460903 12.3386724 -01.717889 2.191799954 +1.6 15 2460904 12.3770728 -01.979001 2.196488436 +1.6 16 2460905 12.4155564 -02.240287 2.201126638 +1.6 17 2460906 12.4541244 -02.501721 2.205714249 +1.6 18 2460907 12.4927782 -02.763273 2.210250932 +1.6 19 2460908 12.5315186 -03.024913 2.214736346 +1.6 20 2460909 12.5703469 -03.286607 2.219170168 +1.6 21 2460910 12.6092640 -03.548324 2.223552120 +1.6 22 2460911 12.6482715 -03.810033 2.227881975 +1.6 23 2460912 12.6873708 -04.071702 2.232159574 +1.6 24 2460913 12.7265635 -04.333301 2.236384829 +1.6 25 2460914 12.7658510 -04.594799 2.240557716 +1.6 26 2460915 12.8052351 -04.856165 2.244678275 +1.6 27 2460916 12.8447170 -05.117368 2.248746599 +1.6 28 2460917 12.8842984 -05.378376 2.252762829 +1.6 29 2460918 12.9239805 -05.639157 2.256727149 +1.6 30 2460919 12.9637646 -05.899678 2.260639779 +1.6 31 2460920 13.0036520 -06.159906 2.264500977 +1.6 xx 2460921 13.0436439 -06.419808 2.268311038 +1.6 xx 2460922 13.0837415 -06.679348 2.272070293 +1.6 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================