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 = 2025 Jul 17 - Thu Local Time = 02:32:40 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460873.60601852 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 00h 16m 38.08s = 0.2772443h = 4.1586645° Declination = -00° 22' 40.20" = -0.377833° True Distance = 29.482989108 AU = 4.410592392 Bkm = 2.740615053 Bmi Visual Magnitude = +7.9 Angular Diameter = 2.272" Horizontal Parallax = 0.298" = 0.004971' = 0.000082855° Light/Signal Time = 04h 05m 12.15s =========================================================================== 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 16m 38.09s = 0.2772482h = 4.1587226° Topocentric Decl = -00° 22' 40.40" = -0.377889° Local Hour Angle = +16h 49m 24.43s = 252.35179584535° (W=Negative) Local Sidereal Time = 17h 06m 02.524s = 17.100701228h = 256.510518413° Azimuth = 258.09174° (Measured clockwise from S=0°) = 78.09174° (Measured clockwise from N=0°) Direction = ENE Altitude = -13.12582° (Invisible - Below Local Horizon) =========================================================================== Neptune Ephemeris Table For Each Day Of Jul. 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 2460855 0.1674165 -00.351840 29.785852884 +7.9 xx 2460856 0.1676363 -00.351359 29.769085544 +7.9 xx 2460857 0.1678218 -00.351100 29.752348459 +7.9 xx 2460858 0.1679735 -00.351062 29.735646445 +7.9 1 2460859 0.1680916 -00.351240 29.718984236 +7.9 2 2460860 0.1681766 -00.351633 29.702366502 +7.9 3 2460861 0.1682288 -00.352237 29.685797850 +7.9 4 2460862 0.1682484 -00.353052 29.669282832 +7.9 5 2460863 0.1682357 -00.354075 29.652825945 +7.9 6 2460864 0.1681905 -00.355306 29.636431638 +7.9 7 2460865 0.1681130 -00.356745 29.620104307 +7.9 8 2460866 0.1680030 -00.358393 29.603848306 +7.9 9 2460867 0.1678602 -00.360249 29.587667944 +7.9 10 2460868 0.1676844 -00.362317 29.571567502 +7.9 11 2460869 0.1674754 -00.364598 29.555551245 +7.9 12 2460870 0.1672330 -00.367091 29.539623440 +7.9 13 2460871 0.1669572 -00.369798 29.523788375 +7.9 14 2460872 0.1666485 -00.372715 29.508050385 +7.9 15 2460873 0.1663072 -00.375840 29.492413864 +7.9 16 2460874 0.1659341 -00.379168 29.476883284 +7.9 17 2460875 0.1655295 -00.382696 29.461463203 +7.9 18 2460876 0.1650942 -00.386420 29.446158265 +7.9 19 2460877 0.1646283 -00.390338 29.430973192 +7.9 20 2460878 0.1641318 -00.394449 29.415912772 +7.9 21 2460879 0.1636044 -00.398756 29.400981827 +7.8 22 2460880 0.1630458 -00.403260 29.386185182 +7.8 23 2460881 0.1624555 -00.407963 29.371527627 +7.8 24 2460882 0.1618335 -00.412867 29.357013881 +7.8 25 2460883 0.1611800 -00.417969 29.342648566 +7.8 26 2460884 0.1604953 -00.423267 29.328436188 +7.8 27 2460885 0.1597802 -00.428757 29.314381132 +7.8 28 2460886 0.1590352 -00.434433 29.300487664 +7.8 29 2460887 0.1582610 -00.440292 29.286759940 +7.8 30 2460888 0.1574583 -00.446328 29.273202014 +7.8 31 2460889 0.1566277 -00.452538 29.259817846 +7.8 xx 2460890 0.1557694 -00.458919 29.246611309 +7.8 xx 2460891 0.1548840 -00.465468 29.233586190 +7.8 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================
Programmed in PHP by Jay Tanner - 2025 - v4.0