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 May 03 - Sat Local Time = 04:11:03 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460798.67434028 =========================================================================== Geocentric Equatorial Coordinates of Mars Right Ascension = 08h 38m 01.89s = 8.6338593h = 129.5078895° Declination = +20° 30' 49.18" = +20.513660° True Distance = 1.441775257 AU = 215.686508 Mkm = 134.021383 Mmi Visual Magnitude = +1.0 Angular Diameter = 4.661" Horizontal Parallax = 6.100" = 0.101659' = 0.001694314° Light/Signal Time = 11m 59.45s =========================================================================== 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 38m 01.58s = 8.6337726h = 129.5065894° Topocentric Decl = +20° 30' 45.65" = +20.512681° Local Hour Angle = +05h 10m 58.28s = 77.742840607354° (W=Negative) Local Sidereal Time = 13h 48m 59.863s = 13.816628668h = 207.249430019° Azimuth = 97.61298° (Measured clockwise from S=0°) = 277.61298° (Measured clockwise from N=0°) Direction = W Altitude = +22.57412° (Above Local Horizon - No refractions applied) =========================================================================== Mars Ephemeris Table For Each Day Of May 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 2460794 8.4875844 +21.131704 1.398495942 +0.9 xx 2460795 8.5185571 +21.002778 1.407794474 +0.9 xx 2460796 8.5497105 +20.872055 1.417072405 +0.9 xx 2460797 8.5810376 +20.739539 1.426328604 +0.9 1 2460798 8.6125312 +20.605235 1.435562059 +1.0 2 2460799 8.6441848 +20.469145 1.444771879 +1.0 3 2460800 8.6759920 +20.331272 1.453957285 +1.0 4 2460801 8.7079471 +20.191619 1.463117588 +1.0 5 2460802 8.7400446 +20.050186 1.472252177 +1.0 6 2460803 8.7722797 +19.906976 1.481360505 +1.0 7 2460804 8.8046478 +19.761991 1.490442074 +1.0 8 2460805 8.8371444 +19.615234 1.499496431 +1.0 9 2460806 8.8697655 +19.466710 1.508523156 +1.1 10 2460807 8.9025072 +19.316422 1.517521863 +1.1 11 2460808 8.9353656 +19.164375 1.526492187 +1.1 12 2460809 8.9683371 +19.010574 1.535433781 +1.1 13 2460810 9.0014181 +18.855026 1.544346307 +1.1 14 2460811 9.0346053 +18.697734 1.553229430 +1.1 15 2460812 9.0678953 +18.538704 1.562082805 +1.1 16 2460813 9.1012849 +18.377941 1.570906074 +1.1 17 2460814 9.1347711 +18.215447 1.579698852 +1.1 18 2460815 9.1683512 +18.051226 1.588460718 +1.2 19 2460816 9.2020227 +17.885279 1.597191205 +1.2 20 2460817 9.2357834 +17.717604 1.605889786 +1.2 21 2460818 9.2696315 +17.548203 1.614555860 +1.2 22 2460819 9.3035655 +17.377073 1.623188746 +1.2 23 2460820 9.3375841 +17.204217 1.631787677 +1.2 24 2460821 9.3716857 +17.029637 1.640351810 +1.2 25 2460822 9.4058684 +16.853342 1.648880252 +1.2 26 2460823 9.4401297 +16.675345 1.657372097 +1.2 27 2460824 9.4744665 +16.495661 1.665826476 +1.2 28 2460825 9.5088751 +16.314306 1.674242594 +1.3 29 2460826 9.5433521 +16.131297 1.682619758 +1.3 30 2460827 9.5778942 +15.946648 1.690957387 +1.3 31 2460828 9.6124986 +15.760373 1.699255004 +1.3 xx 2460829 9.6471628 +15.572486 1.707512221 +1.3 xx 2460830 9.6818848 +15.382998 1.715728723 +1.3 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================