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 Oct 18 - Sat Local Time = 04:01:40 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460966.66782407 =========================================================================== Geocentric Equatorial Coordinates of Mars Right Ascension = 15h 00m 39.90s = 15.0110822h = 225.1662330° Declination = -17° 21' 24.36" = -17.356767° True Distance = 2.390651218 AU = 357.636332 Mkm = 222.224914 Mmi Visual Magnitude = +1.5 Angular Diameter = 2.811" Horizontal Parallax = 3.679" = 0.061309' = 0.001021822° Light/Signal Time = 19m 52.95s =========================================================================== 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 = 15h 00m 39.79s = 15.0110523h = 225.1657850° Topocentric Decl = -17° 21' 26.07" = -17.357241° Local Hour Angle = -14h 18m 43.02s = -214.67923276529° (W=Negative) Local Sidereal Time = 00h 41m 56.773s = 0.699103484h = 10.486552258° Azimuth = 120.01666° (Measured clockwise from S=0°) = 300.01666° (Measured clockwise from N=0°) Direction = WNW Altitude = -51.15684° (Invisible - Below Local Horizon) =========================================================================== Mars Ephemeris Table For Each Day Of Oct. 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 2460947 14.1261818 -12.956468 2.350118511 +1.6 xx 2460948 14.1696874 -13.194918 2.352604165 +1.6 xx 2460949 14.2133440 -13.432036 2.355041923 +1.6 xx 2460950 14.2571525 -13.667780 2.357432187 +1.6 1 2460951 14.3011139 -13.902104 2.359775398 +1.6 2 2460952 14.3452293 -14.134966 2.362072038 +1.6 3 2460953 14.3894998 -14.366321 2.364322625 +1.6 4 2460954 14.4339270 -14.596129 2.366527693 +1.5 5 2460955 14.4785131 -14.824348 2.368687774 +1.5 6 2460956 14.5232602 -15.050942 2.370803358 +1.5 7 2460957 14.5681709 -15.275876 2.372874862 +1.5 8 2460958 14.6132472 -15.499113 2.374902599 +1.5 9 2460959 14.6584910 -15.720618 2.376886762 +1.5 10 2460960 14.7039036 -15.940350 2.378827434 +1.5 11 2460961 14.7494857 -16.158265 2.380724608 +1.5 12 2460962 14.7952383 -16.374318 2.382578213 +1.5 13 2460963 14.8411621 -16.588461 2.384388147 +1.5 14 2460964 14.8872579 -16.800645 2.386154300 +1.5 15 2460965 14.9335267 -17.010823 2.387876574 +1.5 16 2460966 14.9799694 -17.218946 2.389554894 +1.5 17 2460967 15.0265869 -17.424966 2.391189221 +1.5 18 2460968 15.0733801 -17.628837 2.392779551 +1.5 19 2460969 15.1203495 -17.830512 2.394325927 +1.5 20 2460970 15.1674958 -18.029943 2.395828437 +1.5 21 2460971 15.2148192 -18.227085 2.397287219 +1.5 22 2460972 15.2623198 -18.421891 2.398702457 +1.5 23 2460973 15.3099974 -18.614312 2.400074384 +1.5 24 2460974 15.3578519 -18.804301 2.401403279 +1.5 25 2460975 15.4058827 -18.991810 2.402689466 +1.5 26 2460976 15.4540893 -19.176790 2.403933311 +1.5 27 2460977 15.5024710 -19.359192 2.405135225 +1.5 28 2460978 15.5510272 -19.538967 2.406295664 +1.5 29 2460979 15.5997572 -19.716065 2.407415126 +1.5 30 2460980 15.6486605 -19.890437 2.408494159 +1.5 31 2460981 15.6977367 -20.062034 2.409533353 +1.5 xx 2460982 15.7469857 -20.230809 2.410533334 +1.5 xx 2460983 15.7964078 -20.396716 2.411494745 +1.5 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================