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 = 2025 Feb 05 - Wed Local Time = 11:00:02 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460711.95835648 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 23h 55m 02.47s = 23.9173527h = 358.7602905° Declination = -01° 55' 09.62" = -1.919338° True Distance = 30.627978811 AU = 4.581880414 Bkm = 2.847048495 Bmi Visual Magnitude = +7.9 Angular Diameter = 0.219" Horizontal Parallax = 0.287" = 0.004785' = 0.000079758° Light/Signal Time = 04h 14m 43.51s =========================================================================== 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 = 23h 55m 02.48s = 23.9173555h = 358.7603322° Topocentric Decl = -01° 55' 09.81" = -1.919390° Local Hour Angle = -08h 58m 56.71s = -134.73627875931° (W=Negative) Local Sidereal Time = 14h 56m 05.773s = 14.934936895h = 224.024053431° Azimuth = 237.46348° (Measured clockwise from S=0°) = 57.46348° (Measured clockwise from N=0°) Direction = ENE Altitude = -32.63443° (Invisible - Below Local Horizon) =========================================================================== Neptune Ephemeris Table For Each Day Of Feb. 2025 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 2460705 23.9050961 -02.001940 30.542706368 +7.9 xx 2460706 23.9067879 -01.990494 30.555580650 +7.9 xx 2460707 23.9085032 -01.978904 30.568252888 +7.9 xx 2460708 23.9102418 -01.967172 30.580719312 +7.9 1 2460709 23.9120037 -01.955299 30.592976330 +7.9 2 2460710 23.9137889 -01.943282 30.605020539 +7.9 3 2460711 23.9155976 -01.931123 30.616848725 +7.9 4 2460712 23.9174294 -01.918823 30.628457846 +7.9 5 2460713 23.9192840 -01.906386 30.639845016 +7.9 6 2460714 23.9211607 -01.893816 30.651007477 +7.9 7 2460715 23.9230584 -01.881120 30.661942571 +7.9 8 2460716 23.9249763 -01.868304 30.672647720 +7.9 9 2460717 23.9269135 -01.855373 30.683120397 +7.9 10 2460718 23.9288692 -01.842333 30.693358109 +7.9 11 2460719 23.9308428 -01.829187 30.703358384 +7.9 12 2460720 23.9328341 -01.815937 30.713118757 +7.9 13 2460721 23.9348427 -01.802585 30.722636767 +7.9 14 2460722 23.9368686 -01.789132 30.731909962 +7.9 15 2460723 23.9389116 -01.775578 30.740935897 +7.9 16 2460724 23.9409715 -01.761925 30.749712146 +7.9 17 2460725 23.9430481 -01.748175 30.758236306 +7.9 18 2460726 23.9451412 -01.734329 30.766506006 +7.9 19 2460727 23.9472502 -01.720390 30.774518906 +7.9 20 2460728 23.9493748 -01.706361 30.782272705 +7.9 21 2460729 23.9515141 -01.692248 30.789765144 +7.9 22 2460730 23.9536676 -01.678054 30.796994001 +8.0 23 2460731 23.9558344 -01.663785 30.803957107 +8.0 24 2460732 23.9580135 -01.649449 30.810652348 +8.0 25 2460733 23.9602039 -01.635049 30.817077692 +8.0 26 2460734 23.9624051 -01.620592 30.823231213 +8.0 27 2460735 23.9646164 -01.606081 30.829111128 +8.0 28 2460736 23.9668377 -01.591516 30.834715834 +8.0 xx 2460737 23.9690691 -01.576898 30.840043936 +8.0 xx 2460738 23.9713106 -01.562227 30.845094255 +8.0 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================