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 Jan 16 - Fri Local Time = 10:33:45 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2461056.94010417 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 00h 01m 14.07s = 0.0205745h = 0.3086175° Declination = -01° 18' 29.96" = -1.308322° True Distance = 30.310919238 AU = 4.534448977 Bkm = 2.817575967 Bmi Visual Magnitude = +7.9 Angular Diameter = 2.210" Horizontal Parallax = 0.290" = 0.004836' = 0.000080592° Light/Signal Time = 04h 12m 05.29s =========================================================================== 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 01m 14.07s = 0.0205757h = 0.3086350° Topocentric Decl = -01° 18' 30.15" = -1.308375° Local Hour Angle = +13h 08m 42.30s = 197.17626023631° (W=Negative) Local Sidereal Time = 13h 09m 56.375s = 13.165659683h = 197.484895244° Azimuth = 205.05265° (Measured clockwise from S=0°) = 25.05265° (Measured clockwise from N=0°) Direction = NNE Altitude = -45.79622° (Invisible - Below Local Horizon) =========================================================================== Neptune Ephemeris Table For Each Day Of Jan. 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 2461039 0.0034206 -01.431743 30.015191009 +7.9 xx 2461040 0.0040937 -01.426666 30.032321939 +7.9 xx 2461041 0.0048025 -01.421360 30.049401717 +7.9 xx 2461042 0.0055466 -01.415829 30.066425526 +7.9 1 2461043 0.0063254 -01.410076 30.083388658 +7.9 2 2461044 0.0071378 -01.404108 30.100286472 +7.9 3 2461045 0.0079832 -01.397931 30.117114353 +7.9 4 2461046 0.0088609 -01.391548 30.133867658 +7.9 5 2461047 0.0097706 -01.384962 30.150541692 +7.9 6 2461048 0.0107123 -01.378172 30.167131685 +7.9 7 2461049 0.0116864 -01.371176 30.183632803 +7.9 8 2461050 0.0126930 -01.363974 30.200040154 +7.9 9 2461051 0.0137323 -01.356565 30.216348809 +7.9 10 2461052 0.0148043 -01.348948 30.232553814 +7.9 11 2461053 0.0159090 -01.341125 30.248650209 +7.9 12 2461054 0.0170462 -01.333095 30.264633033 +7.9 13 2461055 0.0182156 -01.324863 30.280497336 +7.9 14 2461056 0.0194168 -01.316430 30.296238182 +7.9 15 2461057 0.0206492 -01.307800 30.311850657 +7.9 16 2461058 0.0219124 -01.298977 30.327329878 +7.9 17 2461059 0.0232057 -01.289965 30.342670997 +7.9 18 2461060 0.0245284 -01.280769 30.357869222 +7.9 19 2461061 0.0258801 -01.271391 30.372919825 +7.9 20 2461062 0.0272603 -01.261836 30.387818166 +7.9 21 2461063 0.0286687 -01.252105 30.402559707 +7.9 22 2461064 0.0301053 -01.242200 30.417140033 +7.9 23 2461065 0.0315700 -01.232119 30.431554867 +7.9 24 2461066 0.0330630 -01.221863 30.445800082 +7.9 25 2461067 0.0345842 -01.211433 30.459871709 +7.9 26 2461068 0.0361335 -01.200829 30.473765937 +7.9 27 2461069 0.0377104 -01.190055 30.487479115 +7.9 28 2461070 0.0393142 -01.179116 30.501007729 +7.9 29 2461071 0.0409439 -01.168017 30.514348383 +7.9 30 2461072 0.0425985 -01.156767 30.527497763 +7.9 31 2461073 0.0442770 -01.145371 30.540452598 +7.9 xx 2461074 0.0459788 -01.133833 30.553209626 +7.9 xx 2461075 0.0477036 -01.122155 30.565765564 +7.9 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================
Programmed in PHP by Jay Tanner - 2026 - v4.0