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 = 2023 Mar 27 - Mon Local Time = 23:03:14 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460031.46057870 =========================================================================== Geocentric Equatorial Coordinates of Neptune Right Ascension = 23h 45m 35.53s = 23.7598691h = 356.3980365° Declination = -02° 50' 10.52" = -2.836255° True Distance = 30.887739843 AU = 4.620740111 Bkm = 2.871194792 Bmi Visual Magnitude = +8.0 Angular Diameter = 0.218" Horizontal Parallax = 0.285" = 0.004745' = 0.000079087° Light/Signal Time = 04h 16m 53.13s =========================================================================== 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 45m 35.52s = 23.7598653h = 356.3979788° Topocentric Decl = -02° 50' 10.71" = -2.836308° Local Hour Angle = -17h 29m 13.84s = -262.30764969162° (W=Negative) Local Sidereal Time = 06h 16m 21.679s = 6.272688607h = 94.090329098° Azimuth = 93.14690° (Measured clockwise from S=0°) = 273.14690° (Measured clockwise from N=0°) Direction = W Altitude = -7.57121° (Invisible - Below Local Horizon) =========================================================================== Neptune Ephemeris Table For Each Day Of Mar. 2023 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 2460002 23.6918897 -03.273556 30.857261960 +8.0 xx 2460003 23.6941391 -03.258935 30.862319879 +8.0 xx 2460004 23.6963979 -03.244264 30.867099621 +8.0 xx 2460005 23.6986650 -03.229551 30.871600391 +8.0 1 2460006 23.7009399 -03.214798 30.875821460 +8.0 2 2460007 23.7032217 -03.200013 30.879762163 +8.0 3 2460008 23.7055096 -03.185198 30.883421887 +8.0 4 2460009 23.7078031 -03.170359 30.886800073 +8.0 5 2460010 23.7101017 -03.155497 30.889896201 +8.0 6 2460011 23.7124049 -03.140616 30.892709792 +8.0 7 2460012 23.7147125 -03.125718 30.895240390 +8.0 8 2460013 23.7170242 -03.110803 30.897487561 +8.0 9 2460014 23.7193400 -03.095873 30.899450880 +8.0 10 2460015 23.7216597 -03.080928 30.901129934 +8.0 11 2460016 23.7239831 -03.065972 30.902524315 +8.0 12 2460017 23.7263101 -03.051009 30.903633622 +8.0 13 2460018 23.7286403 -03.036051 30.904457470 +8.0 14 2460019 23.7309715 -03.021126 30.904995496 +8.0 15 2460020 23.7332986 -03.006184 30.905247377 +8.0 16 2460021 23.7356282 -02.991185 30.905212853 +8.0 17 2460022 23.7379588 -02.976220 30.904891754 +8.0 18 2460023 23.7402876 -02.961292 30.904284043 +8.0 19 2460024 23.7426138 -02.946396 30.903389845 +8.0 20 2460025 23.7449371 -02.931530 30.902209481 +8.0 21 2460026 23.7472575 -02.916694 30.900743482 +8.0 22 2460027 23.7495750 -02.901887 30.898992580 +8.0 23 2460028 23.7518896 -02.887110 30.896957689 +8.0 24 2460029 23.7542009 -02.872366 30.894639875 +8.0 25 2460030 23.7565081 -02.857659 30.892040319 +8.0 26 2460031 23.7588105 -02.842994 30.889160292 +8.0 27 2460032 23.7611074 -02.828377 30.886001138 +8.0 28 2460033 23.7633978 -02.813813 30.882564257 +8.0 29 2460034 23.7656811 -02.799306 30.878851099 +8.0 30 2460035 23.7679566 -02.784861 30.874863160 +8.0 31 2460036 23.7702236 -02.770483 30.870601977 +8.0 xx 2460037 23.7724816 -02.756173 30.866069125 +8.0 xx 2460038 23.7747303 -02.741935 30.861266209 +8.0 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================