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 = 2024 Mar 28 - Thu Local Time = 11:28:37 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460397.97820602 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 23h 53m 46.35s = 23.8962092h = 358.4431380° Declination = -02° 00' 10.46" = -2.002905° True Distance = 30.882297470 AU = 4.619925944 Bkm = 2.870688892 Bmi Visual Magnitude = +8.0 Angular Diameter = 0.218" Horizontal Parallax = 0.285" = 0.004746' = 0.000079101° Light/Signal Time = 04h 16m 50.41s =========================================================================== 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 = 23h 53m 46.37s = 23.8962130h = 358.4431947° Topocentric Decl = -02° 00' 10.65" = -2.002959° Local Hour Angle = -05h 06m 59.68s = -76.748679338076° (W=Negative) Local Sidereal Time = 18h 46m 46.684s = 18.779634355h = 281.694515321° Azimuth = 280.55002° (Measured clockwise from S=0°) = 100.55002° (Measured clockwise from N=0°) Direction = E Altitude = +8.30768° (Above Local Horizon - No refractions applied) =========================================================================== Neptune Ephemeris Table For Each Day Of Mar. 2024 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 2460368 23.8272420 -02.448549 30.840798574 +8.0 xx 2460369 23.8294698 -02.433990 30.846272549 +8.0 xx 2460370 23.8317078 -02.419375 30.851472156 +8.0 xx 2460371 23.8339560 -02.404705 30.856396020 +8.0 1 2460372 23.8362138 -02.389984 30.861042791 +8.0 2 2460373 23.8384808 -02.375215 30.865411148 +8.0 3 2460374 23.8407564 -02.360401 30.869499794 +8.0 4 2460375 23.8430398 -02.345549 30.873307464 +8.0 5 2460376 23.8453299 -02.330664 30.876832938 +8.0 6 2460377 23.8476257 -02.315754 30.880075052 +8.0 7 2460378 23.8499262 -02.300825 30.883032741 +8.0 8 2460379 23.8522307 -02.285882 30.885705068 +8.0 9 2460380 23.8545388 -02.270926 30.888091280 +8.0 10 2460381 23.8568505 -02.255959 30.890190836 +8.0 11 2460382 23.8591659 -02.240979 30.892003429 +8.0 12 2460383 23.8614852 -02.225987 30.893528968 +8.0 13 2460384 23.8638081 -02.210987 30.894767554 +8.0 14 2460385 23.8661340 -02.195988 30.895719435 +8.0 15 2460386 23.8684618 -02.181011 30.896384965 +8.0 16 2460387 23.8707873 -02.166065 30.896764576 +8.0 17 2460388 23.8731109 -02.151058 30.896858757 +8.0 18 2460389 23.8754371 -02.136055 30.896668042 +8.0 19 2460390 23.8777625 -02.121089 30.896193000 +8.0 20 2460391 23.8800859 -02.106157 30.895434238 +8.0 21 2460392 23.8824066 -02.091258 30.894392389 +8.0 22 2460393 23.8847243 -02.076392 30.893068117 +8.0 23 2460394 23.8870387 -02.061559 30.891462107 +8.0 24 2460395 23.8893496 -02.046761 30.889575066 +8.0 25 2460396 23.8916568 -02.031998 30.887407721 +8.0 26 2460397 23.8939601 -02.017273 30.884960812 +8.0 27 2460398 23.8962593 -02.002585 30.882235099 +8.0 28 2460399 23.8985541 -01.987938 30.879231356 +8.0 29 2460400 23.9008440 -01.973334 30.875950377 +8.0 30 2460401 23.9031283 -01.958778 30.872392982 +8.0 31 2460402 23.9054064 -01.944274 30.868560018 +8.0 xx 2460403 23.9076774 -01.929827 30.864452370 +8.0 xx 2460404 23.9099403 -01.915445 30.860070978 +8.0 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================