Neptune 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.
Neptune Ephemeris Statistics Referred to True Ecliptic and Equinox of Date Based on the NASA/JPL DE405 Ephemeris Model Local Date = 2026 Aug 14 - Fri Local Time = 18:29:17 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2461267.27033565 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 00h 22m 26.08s = 0.3739115h = 5.6086725° Declination = +00° 19' 07.88" = +0.318857° True Distance = 29.119510211 AU = 4.356216723 Bkm = 2.706827579 Bmi Visual Magnitude = +7.8 Angular Diameter = 0.231" Horizontal Parallax = 0.302" = 0.005033' = 0.000083889° Light/Signal Time = 04h 02m 10.78s =========================================================================== 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 22m 26.08s = 0.3739100h = 5.6086495° Topocentric Decl = +00° 19' 07.68" = +0.318800° Local Hour Angle = +10h 32m 17.24s = 158.07184187883° (W=Negative) Local Sidereal Time = 10h 54m 43.318s = 10.912032756h = 163.680491339° Azimuth = 149.49295° (Measured clockwise from S=0°) = 329.49295° (Measured clockwise from N=0°) Direction = NNW Altitude = -42.63961° (Invisible - Below Local Horizon) =========================================================================== Neptune Ephemeris Table For Each Day Of Aug. 2026 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 2461251 0.2992278 +00.428106 29.327646705 +7.8 xx 2461252 0.2985312 +00.422731 29.313511459 +7.8 xx 2461253 0.2978042 +00.417166 29.299532836 +7.8 xx 2461254 0.2970472 +00.411414 29.285714782 +7.8 1 2461255 0.2962606 +00.405478 29.272061257 +7.8 2 2461256 0.2954452 +00.399361 29.258576248 +7.8 3 2461257 0.2946014 +00.393068 29.245263780 +7.8 4 2461258 0.2937301 +00.386605 29.232127924 +7.8 5 2461259 0.2928318 +00.379974 29.219172805 +7.8 6 2461260 0.2919069 +00.373180 29.206402600 +7.8 7 2461261 0.2909556 +00.366223 29.193821536 +7.8 8 2461262 0.2899776 +00.359103 29.181433869 +7.8 9 2461263 0.2889727 +00.351818 29.169243862 +7.8 10 2461264 0.2879406 +00.344367 29.157255739 +7.8 11 2461265 0.2868814 +00.336750 29.145473648 +7.8 12 2461266 0.2857953 +00.328969 29.133901611 +7.8 13 2461267 0.2846832 +00.321030 29.122543497 +7.8 14 2461268 0.2835459 +00.312937 29.111403007 +7.8 15 2461269 0.2823844 +00.304697 29.100483676 +7.8 16 2461270 0.2811996 +00.296318 29.089788886 +7.8 17 2461271 0.2799922 +00.287803 29.079321884 +7.8 18 2461272 0.2787627 +00.279157 29.069085799 +7.8 19 2461273 0.2775116 +00.270382 29.059083660 +7.8 20 2461274 0.2762392 +00.261482 29.049318403 +7.8 21 2461275 0.2749459 +00.252458 29.039792879 +7.8 22 2461276 0.2736317 +00.243312 29.030509860 +7.8 23 2461277 0.2722970 +00.234046 29.021472044 +7.8 24 2461278 0.2709419 +00.224661 29.012682058 +7.8 25 2461279 0.2695669 +00.215159 29.004142466 +7.8 26 2461280 0.2681722 +00.205543 28.995855782 +7.8 27 2461281 0.2667585 +00.195816 28.987824479 +7.8 28 2461282 0.2653263 +00.185982 28.980051007 +7.8 29 2461283 0.2638766 +00.176047 28.972537811 +7.8 30 2461284 0.2624102 +00.166016 28.965287339 +7.8 31 2461285 0.2609281 +00.155896 28.958302059 +7.8 xx 2461286 0.2594312 +00.145693 28.951584457 +7.8 xx 2461287 0.2579200 +00.135411 28.945137042 +7.8 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================