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 Jun 18 - Thu Local Time = 05:12:44 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2461209.71717593 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 00h 17m 59.96s = 0.2999898h = 4.4998470° Declination = +00° 28' 19.03" = +0.471954° True Distance = 29.992785048 AU = 4.486856779 Bkm = 2.788003546 Bmi Visual Magnitude = +7.9 Angular Diameter = 0.224" Horizontal Parallax = 0.293" = 0.004887' = 0.000081447° Light/Signal Time = 04h 09m 26.54s =========================================================================== 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 17m 59.98s = 0.2999938h = 4.4999065° Topocentric Decl = +00° 28' 18.84" = +0.471899° Local Hour Angle = +17h 33m 15.72s = 263.31548964545° (W=Negative) Local Sidereal Time = 17h 51m 15.695s = 17.854359743h = 267.815396139° Azimuth = 265.10471° (Measured clockwise from S=0°) = 85.10471° (Measured clockwise from N=0°) Direction = E Altitude = -4.58167° (Invisible - Below Local Horizon) =========================================================================== Neptune Ephemeris Table For Each Day Of Jun. 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 2461190 0.2808212 +00.365600 30.309254836 +7.9 xx 2461191 0.2820745 +00.372868 30.294077550 +7.9 xx 2461192 0.2832998 +00.379947 30.278783022 +7.9 xx 2461193 0.2844965 +00.386835 30.263375141 +7.9 1 2461194 0.2856642 +00.393530 30.247857806 +7.9 2 2461195 0.2868023 +00.400028 30.232234937 +7.9 3 2461196 0.2879105 +00.406325 30.216510481 +7.9 4 2461197 0.2889882 +00.412420 30.200688419 +7.9 5 2461198 0.2900351 +00.418310 30.184772778 +7.9 6 2461199 0.2910510 +00.423992 30.168767634 +7.9 7 2461200 0.2920357 +00.429467 30.152677125 +7.9 8 2461201 0.2929893 +00.434735 30.136505468 +7.9 9 2461202 0.2939120 +00.439797 30.120256968 +7.9 10 2461203 0.2948040 +00.444655 30.103936044 +7.9 11 2461204 0.2956656 +00.449311 30.087547246 +7.9 12 2461205 0.2964968 +00.453764 30.071095267 +7.9 13 2461206 0.2972972 +00.458015 30.054584942 +7.9 14 2461207 0.2980662 +00.462058 30.038021226 +7.9 15 2461208 0.2988028 +00.465888 30.021409147 +7.9 16 2461209 0.2995061 +00.469500 30.004753759 +7.9 17 2461210 0.3001757 +00.472890 29.988060079 +7.9 18 2461211 0.3008113 +00.476057 29.971333055 +7.9 19 2461212 0.3014132 +00.479003 29.954577544 +7.9 20 2461213 0.3019818 +00.481730 29.937798312 +7.9 21 2461214 0.3025175 +00.484240 29.921000041 +7.9 22 2461215 0.3030205 +00.486538 29.904187342 +7.9 23 2461216 0.3034911 +00.488623 29.887364769 +7.9 24 2461217 0.3039293 +00.490498 29.870536830 +7.9 25 2461218 0.3043352 +00.492162 29.853707996 +7.9 26 2461219 0.3047086 +00.493615 29.836882709 +7.9 27 2461220 0.3050494 +00.494856 29.820065383 +7.9 28 2461221 0.3053571 +00.495884 29.803260420 +7.9 29 2461222 0.3056316 +00.496696 29.786472206 +7.9 30 2461223 0.3058726 +00.497292 29.769705128 +7.9 xx 2461224 0.3060797 +00.497669 29.752963577 +7.9 xx 2461225 0.3062530 +00.497827 29.736251957 +7.9 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================