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 Apr 26 - Sat Local Time = 04:29:51 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460791.68739583 =========================================================================== Geocentric Equatorial Coordinates of Mars Right Ascension = 08h 25m 00.06s = 8.4166840h = 126.2502600° Declination = +21° 25' 22.64" = +21.422956° True Distance = 1.376920107 AU = 205.984316 Mkm = 127.992720 Mmi Visual Magnitude = +0.9 Angular Diameter = 4.880" Horizontal Parallax = 6.387" = 0.106447' = 0.001774119° Light/Signal Time = 11m 27.09s =========================================================================== 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 = 08h 24m 59.73s = 8.4165923h = 126.2488850° Topocentric Decl = +21° 25' 18.96" = +21.421933° Local Hour Angle = +05h 15m 15.30s = 78.813745040574° (W=Negative) Local Sidereal Time = 13h 40m 15.031s = 13.670842006h = 205.062630089° Azimuth = 99.05836° (Measured clockwise from S=0°) = 279.05836° (Measured clockwise from N=0°) Direction = W Altitude = +22.36729° (Above Local Horizon - No refractions applied) =========================================================================== Mars Ephemeris Table For Each Day Of Apr. 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 2460764 7.6742611 +24.201252 1.115377873 +0.4 xx 2460765 7.6965532 +24.122441 1.124789079 +0.4 xx 2460766 7.7192771 +24.042091 1.134215358 +0.4 xx 2460767 7.7424213 +23.960195 1.143654645 +0.4 1 2460768 7.7659734 +23.876745 1.153104973 +0.5 2 2460769 7.7899208 +23.791734 1.162564499 +0.5 3 2460770 7.8142509 +23.705157 1.172031519 +0.5 4 2460771 7.8389513 +23.617003 1.181504467 +0.5 5 2460772 7.8640099 +23.527264 1.190981900 +0.5 6 2460773 7.8894156 +23.435928 1.200462487 +0.6 7 2460774 7.9151576 +23.342985 1.209944993 +0.6 8 2460775 7.9412256 +23.248424 1.219428265 +0.6 9 2460776 7.9676100 +23.152234 1.228911220 +0.6 10 2460777 7.9943016 +23.054404 1.238392834 +0.6 11 2460778 8.0212917 +22.954925 1.247872137 +0.7 12 2460779 8.0485717 +22.853788 1.257348197 +0.7 13 2460780 8.0761335 +22.750983 1.266820115 +0.7 14 2460781 8.1039693 +22.646504 1.276287019 +0.7 15 2460782 8.1320713 +22.540342 1.285748049 +0.7 16 2460783 8.1604320 +22.432488 1.295202357 +0.7 17 2460784 8.1890443 +22.322935 1.304649095 +0.8 18 2460785 8.2179011 +22.211675 1.314087409 +0.8 19 2460786 8.2469955 +22.098698 1.323516432 +0.8 20 2460787 8.2763209 +21.983995 1.332935271 +0.8 21 2460788 8.3058711 +21.867553 1.342342999 +0.8 22 2460789 8.3356402 +21.749361 1.351738632 +0.8 23 2460790 8.3656225 +21.629405 1.361121121 +0.8 24 2460791 8.3958130 +21.507672 1.370489338 +0.9 25 2460792 8.4262068 +21.384149 1.379842070 +0.9 26 2460793 8.4567990 +21.258828 1.389178042 +0.9 27 2460794 8.4875844 +21.131704 1.398495942 +0.9 28 2460795 8.5185571 +21.002778 1.407794474 +0.9 29 2460796 8.5497105 +20.872055 1.417072405 +0.9 30 2460797 8.5810376 +20.739539 1.426328604 +0.9 xx 2460798 8.6125312 +20.605235 1.435562059 +1.0 xx 2460799 8.6441848 +20.469145 1.444771879 +1.0 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================