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 Dec 03 - Wed Local Time = 02:52:35 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2461012.61984954 =========================================================================== Geocentric Equatorial Coordinates of Mars Right Ascension = 17h 20m 02.74s = 17.3340951h = 260.0114265° Declination = -23° 48' 11.08" = -23.803079° True Distance = 2.423734514 AU = 362.585522 Mkm = 225.300198 Mmi Visual Magnitude = +1.3 Angular Diameter = 2.773" Horizontal Parallax = 3.628" = 0.060472' = 0.001007874° Light/Signal Time = 20m 09.46s =========================================================================== 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 = 17h 20m 02.61s = 17.3340593h = 260.0108897° Topocentric Decl = -23° 48' 12.52" = -23.803478° Local Hour Angle = -14h 46m 00.61s = -221.50255635978° (W=Negative) Local Sidereal Time = 02h 34m 02.000s = 2.567222220h = 38.508333302° Azimuth = 105.55667° (Measured clockwise from S=0°) = 285.55667° (Measured clockwise from N=0°) Direction = WNW Altitude = -50.99852° (Invisible - Below Local Horizon) =========================================================================== Mars Ephemeris Table For Each Day Of Dec. 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 2461008 17.0858917 -23.485128 2.423782016 +1.3 xx 2461009 17.1393991 -23.561245 2.423826242 +1.3 xx 2461010 17.1930291 -23.633359 2.423839738 +1.3 xx 2461011 17.2467793 -23.701437 2.423823204 +1.3 1 2461012 17.3006472 -23.765451 2.423777351 +1.3 2 2461013 17.3546301 -23.825376 2.423702867 +1.3 3 2461014 17.4087252 -23.881186 2.423600377 +1.3 4 2461015 17.4629292 -23.932858 2.423470407 +1.3 5 2461016 17.5172383 -23.980367 2.423313362 +1.3 6 2461017 17.5716487 -24.023684 2.423129522 +1.3 7 2461018 17.6261565 -24.062780 2.422919061 +1.3 8 2461019 17.6807583 -24.097625 2.422682081 +1.3 9 2461020 17.7354506 -24.128191 2.422418640 +1.3 10 2461021 17.7902299 -24.154454 2.422128785 +1.3 11 2461022 17.8450928 -24.176389 2.421812567 +1.3 12 2461023 17.9000355 -24.193975 2.421470055 +1.3 13 2461024 17.9550542 -24.207194 2.421101341 +1.3 14 2461025 18.0101447 -24.216030 2.420706539 +1.3 15 2461026 18.0653028 -24.220467 2.420285793 +1.3 16 2461027 18.1205239 -24.220491 2.419839273 +1.3 17 2461028 18.1758032 -24.216091 2.419367179 +1.3 18 2461029 18.2311359 -24.207256 2.418869745 +1.2 19 2461030 18.2865168 -24.193976 2.418347245 +1.2 20 2461031 18.3419408 -24.176244 2.417799993 +1.2 21 2461032 18.3974026 -24.154052 2.417228349 +1.2 22 2461033 18.4528971 -24.127392 2.416632724 +1.2 23 2461034 18.5084192 -24.096260 2.416013580 +1.2 24 2461035 18.5639640 -24.060651 2.415371430 +1.2 25 2461036 18.6195270 -24.020561 2.414706839 +1.2 26 2461037 18.6751037 -23.975990 2.414020423 +1.2 27 2461038 18.7306901 -23.926939 2.413312839 +1.2 28 2461039 18.7862824 -23.873412 2.412584782 +1.2 29 2461040 18.8418767 -23.815414 2.411836962 +1.2 30 2461041 18.8974694 -23.752958 2.411070087 +1.2 31 2461042 18.9530563 -23.686053 2.410284823 +1.2 xx 2461043 19.0086333 -23.614712 2.409481769 +1.2 xx 2461044 19.0641960 -23.538946 2.408661418 +1.2 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================