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 Mar 14 - Fri Local Time = 06:48:51 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460748.78392361 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 23h 59m 45.44s = 23.9959563h = 359.9393445° Declination = -01° 24' 06.26" = -1.401738° True Distance = 30.881726471 AU = 4.619840523 Bkm = 2.870635814 Bmi Visual Magnitude = +8.0 Angular Diameter = 0.218" Horizontal Parallax = 0.285" = 0.004746' = 0.000079102° Light/Signal Time = 04h 16m 50.13s =========================================================================== 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 59m 45.45s = 23.9959575h = 359.9393621° Topocentric Decl = -01° 24' 06.44" = -1.401790° Local Hour Angle = -10h 49m 39.39s = -162.41413927568° (W=Negative) Local Sidereal Time = 13h 10m 06.053s = 13.168348187h = 197.525222806° Azimuth = 205.65209° (Measured clockwise from S=0°) = 25.65209° (Measured clockwise from N=0°) Direction = NNE Altitude = -45.75611° (Invisible - Below Local Horizon) =========================================================================== Neptune Ephemeris Table For Each Day Of Mar. 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 2460733 23.9602039 -01.635049 30.817077692 +8.0 xx 2460734 23.9624051 -01.620592 30.823231213 +8.0 xx 2460735 23.9646164 -01.606081 30.829111128 +8.0 xx 2460736 23.9668377 -01.591516 30.834715834 +8.0 1 2460737 23.9690691 -01.576898 30.840043936 +8.0 2 2460738 23.9713106 -01.562227 30.845094255 +8.0 3 2460739 23.9735621 -01.547503 30.849865817 +8.0 4 2460740 23.9758230 -01.532730 30.854357830 +8.0 5 2460741 23.9780926 -01.517913 30.858569647 +8.0 6 2460742 23.9803699 -01.503059 30.862500733 +8.0 7 2460743 23.9826539 -01.488175 30.866150631 +8.0 8 2460744 23.9849435 -01.473266 30.869518944 +8.0 9 2460745 23.9872381 -01.458339 30.872605312 +8.0 10 2460746 23.9895370 -01.443396 30.875409406 +8.0 11 2460747 23.9918397 -01.428441 30.877930914 +8.0 12 2460748 23.9941460 -01.413475 30.880169541 +8.0 13 2460749 23.9964556 -01.398502 30.882125004 +8.0 14 2460750 23.9987684 -01.383521 30.883797033 +8.0 15 2460751 0.0010843 -01.368534 30.885185375 +8.0 16 2460752 0.0034031 -01.353546 30.886289799 +8.0 17 2460753 0.0057246 -01.338567 30.887110100 +8.0 18 2460754 0.0080471 -01.323618 30.887646105 +8.0 19 2460755 0.0103669 -01.308648 30.887897678 +8.0 20 2460756 0.0126894 -01.293628 30.887864724 +8.0 21 2460757 0.0150142 -01.278630 30.887547194 +8.0 22 2460758 0.0173385 -01.263660 30.886945085 +8.0 23 2460759 0.0196612 -01.248719 30.886058449 +8.0 24 2460760 0.0219814 -01.233808 30.884887404 +8.0 25 2460761 0.0242983 -01.218932 30.883432150 +8.0 26 2460762 0.0266112 -01.204095 30.881692997 +8.0 27 2460763 0.0289199 -01.189299 30.879670403 +8.0 28 2460764 0.0312242 -01.174543 30.877365004 +8.0 29 2460765 0.0335245 -01.159827 30.874777649 +8.0 30 2460766 0.0358206 -01.145151 30.871909404 +8.0 31 2460767 0.0381122 -01.130516 30.868761542 +8.0 xx 2460768 0.0403987 -01.115928 30.865335504 +8.0 xx 2460769 0.0426791 -01.101393 30.861632856 +8.0 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================