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 Sep 16 - Tue Local Time = 04:07:47 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460934.67207176 =========================================================================== Geocentric Equatorial Coordinates of Mars Right Ascension = 13h 36m 06.54s = 13.6018158h = 204.0272370° Declination = -09° 55' 25.34" = -9.923705° True Distance = 2.315448992 AU = 346.386239 Mkm = 215.234430 Mmi Visual Magnitude = +1.6 Angular Diameter = 2.902" Horizontal Parallax = 3.798" = 0.063301' = 0.001055009° Light/Signal Time = 19m 15.42s =========================================================================== 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 = 13h 36m 06.41s = 13.6017796h = 204.0266943° Topocentric Decl = -09° 55' 27.52" = -9.924310° Local Hour Angle = +09h 05m 48.65s = 136.45271192012° (W=Negative) Local Sidereal Time = 22h 41m 55.058s = 22.698627083h = 340.479406251° Azimuth = 117.81947° (Measured clockwise from S=0°) = 297.81947° (Measured clockwise from N=0°) Direction = WNW Altitude = -39.88529° (Invisible - Below Local Horizon) =========================================================================== Mars Ephemeris Table For Each Day Of Sep. 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 2460917 12.8842984 -05.378376 2.252762829 +1.6 xx 2460918 12.9239805 -05.639157 2.256727149 +1.6 xx 2460919 12.9637646 -05.899678 2.260639779 +1.6 xx 2460920 13.0036520 -06.159906 2.264500977 +1.6 1 2460921 13.0436439 -06.419808 2.268311038 +1.6 2 2460922 13.0837415 -06.679348 2.272070293 +1.6 3 2460923 13.1239462 -06.938495 2.275779108 +1.6 4 2460924 13.1642592 -07.197212 2.279437878 +1.6 5 2460925 13.2046822 -07.455468 2.283047017 +1.6 6 2460926 13.2452172 -07.713230 2.286606935 +1.6 7 2460927 13.2858664 -07.970469 2.290118016 +1.6 8 2460928 13.3266327 -08.227159 2.293580585 +1.6 9 2460929 13.3675190 -08.483273 2.296994884 +1.6 10 2460930 13.4085281 -08.738786 2.300361051 +1.6 11 2460931 13.4496624 -08.993670 2.303679120 +1.6 12 2460932 13.4909241 -09.247895 2.306949030 +1.6 13 2460933 13.5323150 -09.501427 2.310170643 +1.6 14 2460934 13.5738364 -09.754231 2.313343772 +1.6 15 2460935 13.6154898 -10.006268 2.316468200 +1.6 16 2460936 13.6572766 -10.257498 2.319543710 +1.6 17 2460937 13.6991983 -10.507882 2.322570095 +1.6 18 2460938 13.7412564 -10.757380 2.325547183 +1.6 19 2460939 13.7834525 -11.005953 2.328474841 +1.6 20 2460940 13.8257885 -11.253560 2.331352987 +1.6 21 2460941 13.8682659 -11.500163 2.334181596 +1.6 22 2460942 13.9108864 -11.745723 2.336960700 +1.6 23 2460943 13.9536514 -11.990199 2.339690387 +1.6 24 2460944 13.9965623 -12.233553 2.342370799 +1.6 25 2460945 14.0396202 -12.475743 2.345002126 +1.6 26 2460946 14.0828264 -12.716729 2.347584604 +1.6 27 2460947 14.1261818 -12.956468 2.350118511 +1.6 28 2460948 14.1696874 -13.194918 2.352604165 +1.6 29 2460949 14.2133440 -13.432036 2.355041923 +1.6 30 2460950 14.2571525 -13.667780 2.357432187 +1.6 xx 2460951 14.3011139 -13.902104 2.359775398 +1.6 xx 2460952 14.3452293 -14.134966 2.362072038 +1.6 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================