Neptune Ephemeris Calculator
Based on the NASA/JPL DE405 Ephemeris Model
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.
Neptune Ephemeris Statistics Referred to True Ecliptic and Equinox of Date Based on the NASA/JPL DE405 Ephemeris Model Local Date = 2026 May 16 - Sat Local Time = 07:24:46 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2461176.80886574 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 00h 15m 42.22s = 0.2617285h = 3.9259275° Declination = +00° 15' 08.66" = +0.252406° True Distance = 30.496616344 AU = 4.562228868 Bkm = 2.834837591 Bmi Visual Magnitude = +7.9 Angular Diameter = 2.197" Horizontal Parallax = 0.288" = 0.004806' = 0.000080101° Light/Signal Time = 04h 13m 37.96s =========================================================================== Local Topocentric Coordinates of Neptune For Geographic Location: Longitude = -76.833611111° = -05h 07m 20.1s (W=Negative) Latitude = +42.752194444° Elevation = 0 m Topocentric RA = 00h 15m 42.24s = 0.2617324h = 3.9259861° Topocentric Decl = +00° 15' 08.47" = +0.252352° Local Hour Angle = +17h 37m 50.69s = 264.46120637565° (W=Negative) Local Sidereal Time = 17h 53m 32.926s = 17.892479501h = 268.387192510° Azimuth = 266.04846° (Measured clockwise from S=0°) = 86.04846° (Measured clockwise from N=0°) Direction = E Altitude = -3.89244° (Invisible - Below Local Horizon) =========================================================================== Neptune Ephemeris Table For Each Day Of May. 2014 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 2461159 0.2293803 +00.054328 30.700383166 +7.9 xx 2461160 0.2313632 +00.066620 30.690713263 +7.9 xx 2461161 0.2333285 +00.078786 30.680818024 +7.9 xx 2461162 0.2352761 +00.090827 30.670700105 +7.9 1 2461163 0.2372058 +00.102739 30.660362166 +7.9 2 2461164 0.2391170 +00.114522 30.649806875 +7.9 3 2461165 0.2410092 +00.126171 30.639036920 +7.9 4 2461166 0.2428820 +00.137682 30.628055020 +7.9 5 2461167 0.2447345 +00.149053 30.616863930 +7.9 6 2461168 0.2465661 +00.160278 30.605466450 +7.9 7 2461169 0.2483763 +00.171353 30.593865432 +7.9 8 2461170 0.2501644 +00.182275 30.582063781 +7.9 9 2461171 0.2519299 +00.193041 30.570064469 +7.9 10 2461172 0.2536724 +00.203647 30.557870541 +7.9 11 2461173 0.2553918 +00.214092 30.545485130 +7.9 12 2461174 0.2570879 +00.224376 30.532911477 +7.9 13 2461175 0.2587608 +00.234500 30.520152954 +7.9 14 2461176 0.2604108 +00.244463 30.507213090 +7.9 15 2461177 0.2620377 +00.254268 30.494095586 +7.9 16 2461178 0.2636413 +00.263912 30.480804315 +7.9 17 2461179 0.2652208 +00.273391 30.467343307 +7.9 18 2461180 0.2667752 +00.282697 30.453716702 +7.9 19 2461181 0.2683033 +00.291826 30.439928699 +7.9 20 2461182 0.2698044 +00.300771 30.425983509 +7.9 21 2461183 0.2712780 +00.309528 30.411885314 +7.9 22 2461184 0.2727239 +00.318098 30.397638249 +7.9 23 2461185 0.2741420 +00.326479 30.383246393 +7.9 24 2461186 0.2755326 +00.334674 30.368713774 +7.9 25 2461187 0.2768958 +00.342683 30.354044375 +7.9 26 2461188 0.2782317 +00.350507 30.339242143 +7.9 27 2461189 0.2795402 +00.358146 30.324310997 +7.9 28 2461190 0.2808212 +00.365600 30.309254836 +7.9 29 2461191 0.2820745 +00.372868 30.294077550 +7.9 30 2461192 0.2832998 +00.379947 30.278783022 +7.9 31 2461193 0.2844965 +00.386835 30.263375141 +7.9 xx 2461194 0.2856642 +00.393530 30.247857806 +7.9 xx 2461195 0.2868023 +00.400028 30.232234937 +7.9 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================
Programmed in PHP by Jay Tanner - 2026 - v4.0