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 Apr 26 - Sat Local Time = 07:33:16 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460791.81476852 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 00h 05m 30.34s = 0.0917613h = 1.3764195° Declination = -00° 47' 31.87" = -0.792187° True Distance = 30.705939647 AU = 4.593543189 Bkm = 2.854295408 Bmi Visual Magnitude = +7.9 Angular Diameter = 0.219" Horizontal Parallax = 0.286" = 0.004773' = 0.000079555° Light/Signal Time = 04h 15m 22.41s =========================================================================== 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 05m 30.35s = 0.0917650h = 1.3764744° Topocentric Decl = -00° 47' 32.07" = -0.792240° Local Hour Angle = +16h 38m 39.81s = 249.66586522654° (W=Negative) Local Sidereal Time = 16h 44m 10.162s = 16.736155973h = 251.042339593° Azimuth = 256.46432° (Measured clockwise from S=0°) = 76.46432° (Measured clockwise from N=0°) Direction = ENE Altitude = -15.33876° (Invisible - Below Local Horizon) =========================================================================== Neptune Ephemeris Table For Each Day Of Apr. 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 2460764 0.0312242 -01.174543 30.877365004 +8.0 xx 2460765 0.0335245 -01.159827 30.874777649 +8.0 xx 2460766 0.0358206 -01.145151 30.871909404 +8.0 xx 2460767 0.0381122 -01.130516 30.868761542 +8.0 1 2460768 0.0403987 -01.115928 30.865335504 +8.0 2 2460769 0.0426791 -01.101393 30.861632856 +8.0 3 2460770 0.0449522 -01.086917 30.857655245 +8.0 4 2460771 0.0472172 -01.072507 30.853404362 +8.0 5 2460772 0.0494731 -01.058169 30.848881928 +8.0 6 2460773 0.0517194 -01.043905 30.844089671 +8.0 7 2460774 0.0539556 -01.029720 30.839029330 +8.0 8 2460775 0.0561814 -01.015614 30.833702645 +8.0 9 2460776 0.0583967 -01.001590 30.828111363 +8.0 10 2460777 0.0606013 -00.987647 30.822257235 +8.0 11 2460778 0.0627950 -00.973786 30.816142018 +8.0 12 2460779 0.0649776 -00.960009 30.809767479 +8.0 13 2460780 0.0671491 -00.946317 30.803135396 +8.0 14 2460781 0.0693089 -00.932712 30.796247566 +8.0 15 2460782 0.0714567 -00.919197 30.789105803 +7.9 16 2460783 0.0735918 -00.905776 30.781711951 +7.9 17 2460784 0.0757138 -00.892451 30.774067885 +7.9 18 2460785 0.0778218 -00.879229 30.766175515 +7.9 19 2460786 0.0799150 -00.866113 30.758036797 +7.9 20 2460787 0.0819928 -00.853110 30.749653739 +7.9 21 2460788 0.0840543 -00.840223 30.741028412 +7.9 22 2460789 0.0860989 -00.827457 30.732162967 +7.9 23 2460790 0.0881263 -00.814814 30.723059663 +7.9 24 2460791 0.0901363 -00.802295 30.713720893 +7.9 25 2460792 0.0921291 -00.789900 30.704149220 +7.9 26 2460793 0.0941048 -00.777626 30.694347400 +7.9 27 2460794 0.0960635 -00.765475 30.684318392 +7.9 28 2460795 0.0980047 -00.753448 30.674065339 +7.9 29 2460796 0.0999276 -00.741551 30.663591532 +7.9 30 2460797 0.1018311 -00.729791 30.652900357 +7.9 xx 2460798 0.1037143 -00.718173 30.641995248 +7.9 xx 2460799 0.1055762 -00.706704 30.630879649 +7.9 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================