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 Jun 25 - Wed Local Time = 05:08:06 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460851.71395833 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 00h 09m 59.22s = 0.1664510h = 2.4967650° Declination = -00° 21' 18.01" = -0.355002° True Distance = 29.841102760 AU = 4.464165432 Bkm = 2.773903797 Bmi Visual Magnitude = +7.9 Angular Diameter = 0.225" Horizontal Parallax = 0.295" = 0.004912' = 0.000081861° Light/Signal Time = 04h 08m 10.85s =========================================================================== 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 09m 59.24s = 0.1664550h = 2.4968252° Topocentric Decl = -00° 21' 18.21" = -0.355057° Local Hour Angle = +18h 05m 10.55s = 271.29395384602° (W=Negative) Local Sidereal Time = 18h 15m 09.787s = 18.252718602h = 273.790779035° Azimuth = 271.13916° (Measured clockwise from S=0°) = 91.13916° (Measured clockwise from N=0°) Direction = E Altitude = +0.70904° (Above Local Horizon - No refractions applied) =========================================================================== Neptune Ephemeris Table For Each Day Of Jun. 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 2460825 0.1456280 -00.465980 30.279124469 +7.9 xx 2460826 0.1468090 -00.459160 30.263634894 +7.9 xx 2460827 0.1479594 -00.452546 30.248038670 +7.9 xx 2460828 0.1490788 -00.446139 30.232340368 +7.9 1 2460829 0.1501672 -00.439939 30.216544502 +7.9 2 2460830 0.1512248 -00.433945 30.200655536 +7.9 3 2460831 0.1522516 -00.428156 30.184677887 +7.9 4 2460832 0.1532478 -00.422572 30.168615933 +7.9 5 2460833 0.1542135 -00.417191 30.152474021 +7.9 6 2460834 0.1551487 -00.412012 30.136256465 +7.9 7 2460835 0.1560536 -00.407035 30.119967555 +7.9 8 2460836 0.1569279 -00.402260 30.103611555 +7.9 9 2460837 0.1577715 -00.397689 30.087192707 +7.9 10 2460838 0.1585841 -00.393323 30.070715234 +7.9 11 2460839 0.1593652 -00.389164 30.054183346 +7.9 12 2460840 0.1601145 -00.385216 30.037601249 +7.9 13 2460841 0.1608313 -00.381480 30.020973156 +7.9 14 2460842 0.1615153 -00.377961 30.004303300 +7.9 15 2460843 0.1621661 -00.374660 29.987595952 +7.9 16 2460844 0.1627837 -00.371578 29.970855437 +7.9 17 2460845 0.1633681 -00.368714 29.954086151 +7.9 18 2460846 0.1639195 -00.366067 29.937292581 +7.9 19 2460847 0.1644383 -00.363634 29.920479322 +7.9 20 2460848 0.1649250 -00.361412 29.903651092 +7.9 21 2460849 0.1653797 -00.359400 29.886812736 +7.9 22 2460850 0.1658024 -00.357597 29.869969220 +7.9 23 2460851 0.1661926 -00.356006 29.853125612 +7.9 24 2460852 0.1665498 -00.354631 29.836287042 +7.9 25 2460853 0.1668731 -00.353477 29.819458658 +7.9 26 2460854 0.1671621 -00.352546 29.802645584 +7.9 27 2460855 0.1674165 -00.351840 29.785852884 +7.9 28 2460856 0.1676363 -00.351359 29.769085544 +7.9 29 2460857 0.1678218 -00.351100 29.752348459 +7.9 30 2460858 0.1679735 -00.351062 29.735646445 +7.9 xx 2460859 0.1680916 -00.351240 29.718984236 +7.9 xx 2460860 0.1681766 -00.351633 29.702366502 +7.9 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================