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 Apr 20 - Sat Local Time = 16:26:34 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460421.18511574 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 23h 56m 49.49s = 23.9470799h = 359.2061985° Declination = -01° 40' 53.00" = -1.681390° True Distance = 30.743606685 AU = 4.599178097 Bkm = 2.857796778 Bmi Visual Magnitude = +7.9 Angular Diameter = 0.219" Horizontal Parallax = 0.286" = 0.004767' = 0.000079458° Light/Signal Time = 04h 15m 41.21s =========================================================================== 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 56m 49.48s = 23.9470786h = 359.2061786° Topocentric Decl = -01° 40' 53.20" = -1.681445° Local Hour Angle = -22h 40m 36.08s = -340.15034835735° (W=Negative) Local Sidereal Time = 01h 16m 13.399s = 1.270388686h = 19.055830292° Azimuth = 27.22279° (Measured clockwise from S=0°) = 207.22279° (Measured clockwise from N=0°) Direction = SSW Altitude = +42.10209° (Above Local Horizon - No refractions applied) =========================================================================== Neptune Ephemeris Table For Each Day Of Apr. 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 2460399 23.8985541 -01.987938 30.879231356 +8.0 xx 2460400 23.9008440 -01.973334 30.875950377 +8.0 xx 2460401 23.9031283 -01.958778 30.872392982 +8.0 xx 2460402 23.9054064 -01.944274 30.868560018 +8.0 1 2460403 23.9076774 -01.929827 30.864452370 +8.0 2 2460404 23.9099403 -01.915445 30.860070978 +8.0 3 2460405 23.9121941 -01.901133 30.855416850 +8.0 4 2460406 23.9144382 -01.886895 30.850491096 +8.0 5 2460407 23.9166719 -01.872736 30.845294961 +8.0 6 2460408 23.9188951 -01.858656 30.839829862 +8.0 7 2460409 23.9211079 -01.844654 30.834097415 +8.0 8 2460410 23.9233105 -01.830730 30.828099453 +8.0 9 2460411 23.9255028 -01.816884 30.821838007 +8.0 10 2460412 23.9276843 -01.803119 30.815315282 +8.0 11 2460413 23.9298543 -01.789441 30.808533607 +8.0 12 2460414 23.9320118 -01.775856 30.801495398 +8.0 13 2460415 23.9341559 -01.762368 30.794203121 +8.0 14 2460416 23.9362858 -01.748985 30.786659274 +8.0 15 2460417 23.9384008 -01.735710 30.778866374 +7.9 16 2460418 23.9405002 -01.722547 30.770826948 +7.9 17 2460419 23.9425838 -01.709498 30.762543537 +7.9 18 2460420 23.9446512 -01.696565 30.754018695 +7.9 19 2460421 23.9467021 -01.683749 30.745254983 +7.9 20 2460422 23.9487365 -01.671052 30.736254970 +7.9 21 2460423 23.9507541 -01.658473 30.727021231 +7.9 22 2460424 23.9527549 -01.646014 30.717556341 +7.9 23 2460425 23.9547388 -01.633674 30.707862873 +7.9 24 2460426 23.9567055 -01.621457 30.697943397 +7.9 25 2460427 23.9586548 -01.609363 30.687800485 +7.9 26 2460428 23.9605860 -01.597396 30.677436707 +7.9 27 2460429 23.9624985 -01.585560 30.666854647 +7.9 28 2460430 23.9643916 -01.573860 30.656056913 +7.9 29 2460431 23.9662644 -01.562301 30.645046148 +7.9 30 2460432 23.9681161 -01.550889 30.633825052 +7.9 xx 2460433 23.9699461 -01.539628 30.622396404 +7.9 xx 2460434 23.9717537 -01.528520 30.610763084 +7.9 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================