Run Time: 30 sec
EXPERIMENTAL G4 Basic Geocentric Equatorial Ephemeris Calculator
Based on the NASA/JPL HORIZONS and DE405 Ephemerides
Solar System Body Name
Sun | Moon | Mercury to Pluto
Local Calendar Date
Year Month Day
Local Clock Time
(00h to 24h)
Time Zone Offset From UTC
(Neg|Pos = West|East)
UTC
...
============================================================================== SUN Ephemeris Span From 1600 to 2025 Apparent Geocentric Equatorial Ephemeris Statistics For True Equator and Equinox of Date For 2020-Jun-02-Tue 21:34:27 LT Local Time Zone UTC+00:00:00 JD 2459003.39972436 TT Delta T +00:01:09 ------------------------------------------------------------------------------ Right Distance Visual Ascension Declination Light_Time Magn Ang_Diameter ---------------- ---------------- ------------------ ------ -------------- 04h 45m 23.079s +22° 19' 45.409" 1.014326932998 AU -26.71 0.5256056556° 4.7564108 h +22.3292804° 151,741,149 km 31.536339' 71° 20' 46.183" 94,287,579 mi 1892.18036" 71.3461620° 08m 26.154 s 0° 31' 32.180" ------------------------------------------------------------------------------ Radial Velocity of Sun Relative to Earth −Neg = Towards +Pos = Away +0.2445535 km/s = +880.39260 km/h away from Earth = +0.1519585 mi/s = +547.05060 mi/h away from Earth ------------------------------------------------------------------------------ ============================================================================== Calendar Date Time Julian Date JD Number --------------- ----------- ---------------- ----------- Local Date/Time 2020-Jun-02-Tue 21:34:27 LT 2459003.39892361 2459003 LT Local Time Zone +00:00:00 TZ +0.00000000 UTC 2020-Jun-02-Tue 21:34:27 UTC 2459003.39892361 2459003 UTC Delta T +00:01:09 DT +0.00080075 Astronomical TT 2020-Jun-02-Tue 21:35:36 TT 2459003.39972436 2459003 TT TAI Adjustment -00:00:32.184 -0.00037250 Atomic Time TAI 2020-Jun-02-Tue 21:35:04 TAI 2459003.39935186 2459003 TAI Horizons Delta T +69.184864s +00:01:09.185 ----> +00:01:09
=================================================================================================== For Numerical Reference: SUN 2020-Jun-02-Tue 21:34:27 LT Time Zone UTC+00:00 Working Julian Date ---> 2459003.39972436 TT Raw 11-point Lagrangian interpolation work table for the Sun Ephemeris JD_TT RA_Hrs Decl_Deg Dist_AU Rad_Vel_kps VMag Illum_% Ang_Diam_" Delta_T_Sec ========= ========== =========== =============== =========== ====== ======= ========== ============ 2459000.5 04.5583506 +21.9489219 01.013903999762 +00.2612089 -26.71 100.000 1892.97000 +0069.184934 2459001.0 04.5924403 +22.0183753 01.013978968253 +00.2580324 -26.71 100.000 1892.83000 +0069.184922 2459001.5 04.6265564 +22.0862237 01.014053038883 +00.2549901 -26.71 100.000 1892.69100 +0069.184910 2459002.0 04.6606983 +22.1524615 01.014126249938 +00.2520783 -26.71 100.000 1892.55500 +0069.184898 2459002.5 04.6948657 +22.2170833 01.014198638254 +00.2492906 -26.71 100.000 1892.42000 +0069.184886 2459003.0 04.7290580 +22.2800839 01.014270238313 +00.2466171 -26.71 100.000 1892.28600 +0069.184874 2459003.5 04.7632750 +22.3414586 01.014341081339 +00.2440451 -26.71 100.000 1892.15400 +0069.184861 2459004.0 04.7975160 +22.4012028 01.014411194423 +00.2415588 -26.71 100.000 1892.02300 +0069.184849 2459004.5 04.8317808 +22.4593122 01.014480599753 +00.2391401 -26.71 100.000 1891.89400 +0069.184837 2459005.0 04.8660689 +22.5157825 01.014549313969 +00.2367688 -26.71 100.000 1891.76600 +0069.184824 2459005.5 04.9003796 +22.5706099 01.014617347712 +00.2344237 -26.71 100.000 1891.63900 +0069.184811
====================================================================================================================== SUN - 2020 Jun 1 to Jun 30 - Month Ephemeris Table TT at 0.5-day Intervals JD_TT Calendar_Date RA_Deg Decl_Deg Geo_Dist_AU Rad_Vel_kps VMag Illum_% Ang_Diam_" Delta_T_Sec --------- --------------- ----------- ----------- --------------- ----------- ------ ------- ----------- ------------- 2458998.5 2020-May-29-Fri 66.3339603 +21.6551849 1.013594376862 +0.2752307 -26.71 100.000 1893.548000 +69.184981 2458999.0 2020-May-29-Fri 66.8436563 +21.7309945 1.013673320085 +0.2715362 -26.71 100.000 1893.400000 +69.184970 2458999.5 2020-May-30-Sat 67.3537766 +21.8052251 1.013751213896 +0.2679638 -26.71 100.000 1893.255000 +69.184958 2459000.0 2020-May-30-Sat 67.8643131 +21.8778698 1.013828094534 +0.2645200 -26.71 100.000 1893.111000 +69.184946 2459000.5 2020-May-31-Sun 68.3752583 +21.9489219 1.013903999762 +0.2612089 -26.71 100.000 1892.970000 +69.184934 2459001.0 2020-May-31-Sun 68.8866049 +22.0183753 1.013978968253 +0.2580324 -26.71 100.000 1892.830000 +69.184922 2459001.5 2020-Jun-01-Mon 69.3983460 +22.0862237 1.014053038883 +0.2549901 -26.71 100.000 1892.691000 +69.184910 2459002.0 2020-Jun-01-Mon 69.9104748 +22.1524615 1.014126249938 +0.2520783 -26.71 100.000 1892.555000 +69.184898 2459002.5 2020-Jun-02-Tue 70.4229851 +22.2170833 1.014198638254 +0.2492906 -26.71 100.000 1892.420000 +69.184886 2459003.0 2020-Jun-02-Tue 70.9358704 +22.2800839 1.014270238313 +0.2466171 -26.71 100.000 1892.286000 +69.184874 2459003.5 2020-Jun-03-Wed 71.4491244 +22.3414586 1.014341081339 +0.2440451 -26.71 100.000 1892.154000 +69.184861 2459004.0 2020-Jun-03-Wed 71.9627407 +22.4012028 1.014411194423 +0.2415588 -26.71 100.000 1892.023000 +69.184849 2459004.5 2020-Jun-04-Thu 72.4767125 +22.4593122 1.014480599753 +0.2391401 -26.71 100.000 1891.894000 +69.184837 2459005.0 2020-Jun-04-Thu 72.9910330 +22.5157825 1.014549313969 +0.2367688 -26.71 100.000 1891.766000 +69.184824 2459005.5 2020-Jun-05-Fri 73.5056947 +22.5706099 1.014617347712 +0.2344237 -26.71 100.000 1891.639000 +69.184811 2459006.0 2020-Jun-05-Fri 74.0206900 +22.6237902 1.014684705385 +0.2320829 -26.71 100.000 1891.513000 +69.184799 2459006.5 2020-Jun-06-Sat 74.5360107 +22.6753195 1.014751385137 +0.2297250 -26.71 100.000 1891.389000 +69.184786 2459007.0 2020-Jun-06-Sat 75.0516483 +22.7251940 1.014817379068 +0.2273297 -26.71 100.000 1891.266000 +69.184773 2459007.5 2020-Jun-07-Sun 75.5675941 +22.7734096 1.014882673635 +0.2248784 -26.71 100.000 1891.144000 +69.184760 2459008.0 2020-Jun-07-Sun 76.0838391 +22.8199623 1.014947250207 +0.2223545 -26.71 100.000 1891.024000 +69.184747 2459008.5 2020-Jun-08-Mon 76.6003739 +22.8648484 1.015011085731 +0.2197439 -26.71 100.000 1890.905000 +69.184734 2459009.0 2020-Jun-08-Mon 77.1171891 +22.9080637 1.015074153456 +0.2170351 -26.71 100.000 1890.787000 +69.184722 2459009.5 2020-Jun-09-Tue 77.6342753 +22.9496045 1.015136423662 +0.2142191 -26.71 100.000 1890.671000 +69.184709 2459010.0 2020-Jun-09-Tue 78.1516226 +22.9894669 1.015197864366 +0.2112892 -26.71 100.000 1890.557000 +69.184695 2459010.5 2020-Jun-10-Wed 78.6692211 +23.0276472 1.015258441960 +0.2082407 -26.71 100.000 1890.444000 +69.184682 2459011.0 2020-Jun-10-Wed 79.1870610 +23.0641419 1.015318121772 +0.2050710 -26.71 100.000 1890.333000 +69.184669 2459011.5 2020-Jun-11-Thu 79.7051319 +23.0989474 1.015376868539 +0.2017785 -26.71 100.000 1890.224000 +69.184656 2459012.0 2020-Jun-11-Thu 80.2234236 +23.1320604 1.015434646786 +0.1983632 -26.71 100.000 1890.116000 +69.184643 2459012.5 2020-Jun-12-Fri 80.7419255 +23.1634778 1.015491421121 +0.1948258 -26.71 100.000 1890.010000 +69.184630 2459013.0 2020-Jun-12-Fri 81.2606268 +23.1931967 1.015547156454 +0.1911675 -26.71 100.000 1889.907000 +69.184616 2459013.5 2020-Jun-13-Sat 81.7795167 +23.2212141 1.015601818153 +0.1873903 -26.71 100.000 1889.805000 +69.184603 2459014.0 2020-Jun-13-Sat 82.2985840 +23.2475274 1.015655372146 +0.1834961 -26.71 100.000 1889.705000 +69.184590 2459014.5 2020-Jun-14-Sun 82.8178174 +23.2721341 1.015707784992 +0.1794873 -26.71 100.000 1889.608000 +69.184577 2459015.0 2020-Jun-14-Sun 83.3372054 +23.2950319 1.015759023928 +0.1753662 -26.71 100.000 1889.513000 +69.184563 2459015.5 2020-Jun-15-Mon 83.8567362 +23.3162187 1.015809056895 +0.1711354 -26.71 100.000 1889.420000 +69.184550 2459016.0 2020-Jun-15-Mon 84.3763979 +23.3356924 1.015857852581 +0.1667975 -26.71 100.000 1889.329000 +69.184536 2459016.5 2020-Jun-16-Tue 84.8961782 +23.3534513 1.015905380464 +0.1623553 -26.71 100.000 1889.240000 +69.184523 2459017.0 2020-Jun-16-Tue 85.4160649 +23.3694939 1.015951610876 +0.1578120 -26.71 100.000 1889.154000 +69.184510 2459017.5 2020-Jun-17-Wed 85.9360451 +23.3838187 1.015996515101 +0.1531710 -26.71 100.000 1889.071000 +69.184496 2459018.0 2020-Jun-17-Wed 86.4561060 +23.3964245 1.016040065497 +0.1484363 -26.71 100.000 1888.990000 +69.184483 2459018.5 2020-Jun-18-Thu 86.9762344 +23.4073103 1.016082235666 +0.1436126 -26.71 100.000 1888.912000 +69.184469 2459019.0 2020-Jun-18-Thu 87.4964168 +23.4164753 1.016123000661 +0.1387053 -26.71 100.000 1888.836000 +69.184456 2459019.5 2020-Jun-19-Fri 88.0166396 +23.4239187 1.016162337231 +0.1337207 -26.71 100.000 1888.763000 +69.184442 2459020.0 2020-Jun-19-Fri 88.5368886 +23.4296402 1.016200224112 +0.1286663 -26.71 100.000 1888.692000 +69.184428 2459020.5 2020-Jun-20-Sat 89.0571495 +23.4336393 1.016236642341 +0.1235506 -26.71 100.000 1888.625000 +69.184415 2459021.0 2020-Jun-20-Sat 89.5774076 +23.4359161 1.016271575605 +0.1183834 -26.71 100.000 1888.560000 +69.184401 2459021.5 2020-Jun-21-Sun 90.0976480 +23.4364704 1.016305010593 +0.1131758 -26.71 100.000 1888.497000 +69.184387 2459022.0 2020-Jun-21-Sun 90.6178556 +23.4353025 1.016336937357 +0.1079399 -26.71 100.000 1888.438000 +69.184374 2459022.5 2020-Jun-22-Mon 91.1380150 +23.4324127 1.016367349645 +0.1026891 -26.71 100.000 1888.382000 +69.184360 2459023.0 2020-Jun-22-Mon 91.6581106 +23.4278015 1.016396245209 +0.0974378 -26.71 100.000 1888.328000 +69.184346 2459023.5 2020-Jun-23-Tue 92.1781269 +23.4214695 1.016423626057 +0.0922010 -26.71 100.000 1888.277000 +69.184333 2459024.0 2020-Jun-23-Tue 92.6980484 +23.4134173 1.016449498641 +0.0869944 -26.71 100.000 1888.229000 +69.184319 2459024.5 2020-Jun-24-Wed 93.2178598 +23.4036459 1.016473873970 +0.0818339 -26.71 100.000 1888.184000 +69.184305 2459025.0 2020-Jun-24-Wed 93.7375458 +23.3921563 1.016496767626 +0.0767352 -26.71 100.000 1888.141000 +69.184291 2459025.5 2020-Jun-25-Thu 94.2570916 +23.3789495 1.016518199697 +0.0717137 -26.71 100.000 1888.101000 +69.184277 2459026.0 2020-Jun-25-Thu 94.7764828 +23.3640269 1.016538194610 +0.0667841 -26.71 100.000 1888.064000 +69.184263 2459026.5 2020-Jun-26-Fri 95.2957056 +23.3473901 1.016556780877 +0.0619598 -26.71 100.000 1888.030000 +69.184249 2459027.0 2020-Jun-26-Fri 95.8147464 +23.3290405 1.016573990744 +0.0572533 -26.71 100.000 1887.998000 +69.184235 2459027.5 2020-Jun-27-Sat 96.3335925 +23.3089803 1.016589859773 +0.0526751 -26.71 100.000 1887.968000 +69.184221 2459028.0 2020-Jun-27-Sat 96.8522315 +23.2872116 1.016604426340 +0.0482340 -26.71 100.000 1887.941000 +69.184207 2459028.5 2020-Jun-28-Sun 97.3706520 +23.2637367 1.016617731075 +0.0439368 -26.71 100.000 1887.917000 +69.184193 2459029.0 2020-Jun-28-Sun 97.8888425 +23.2385584 1.016629816240 +0.0397880 -26.71 100.000 1887.894000 +69.184179 2459029.5 2020-Jun-29-Mon 98.4067925 +23.2116797 1.016640725066 +0.0357898 -26.71 100.000 1887.874000 +69.184165 2459030.0 2020-Jun-29-Mon 98.9244916 +23.1831039 1.016650501045 +0.0319418 -26.71 100.000 1887.856000 +69.184151 2459030.5 2020-Jun-30-Tue 99.4419300 +23.1528345 1.016659187198 +0.0282411 -26.71 100.000 1887.840000 +69.184137 2459031.0 2020-Jun-30-Tue 99.9590978 +23.1208753 1.016666825326 +0.0246822 -26.71 100.000 1887.825000 +69.184122 2459031.5 2020-Jul-01-Wed 100.4759856 +23.0872305 1.016673455264 +0.0212570 -26.71 100.000 1887.813000 +69.184108 2459032.0 2020-Jul-01-Wed 100.9925840 +23.0519041 1.016679114160 +0.0179550 -26.71 100.000 1887.803000 +69.184094 2459032.5 2020-Jul-02-Thu 101.5088839 +23.0149008 1.016683835795 +0.0147634 -26.71 100.000 1887.794000 +69.184079 2459033.0 2020-Jul-02-Thu 102.0248759 +22.9762251 1.016687649980 +0.0116676 -26.71 100.000 1887.787000 +69.184065 2459033.5 2020-Jul-03-Fri 102.5405510 +22.9358816 1.016690582047 +0.0086512 -26.71 100.000 1887.781000 +69.184051 2459034.0 2020-Jul-03-Fri 103.0559001 +22.8938751 1.016692652452 +0.0056969 -26.71 100.000 1887.777000 +69.184036 --------- --------------- ----------- ----------- --------------- ----------- ------ ------- ----------- ------------- JD_TT Calendar_Date RA_Deg Decl_Deg Geo_Dist_AU Rad_Vel_kps VMag Illum_% Ang_Diam_" Delta_T_Sec
EXPERIMENTAL G4 BASIC TABULAR GEOCENTRIC SOLAR SYSTEM EPHEMERIS An Astronomy Program by Jay Tanner - 2020 This simple tabular ephemeris attempts to emulate some of the computations of the NASA/JPL HORIZONS ephemeris, with a little less fuss. The lunar phases, perigees and apogees are computed from the DE405 ephemeris. Positions are for the TRUE ecliptic, equator and equinox of the date. BUG NOTE: Mercury and Venus visual magnitude glitch, where the bodies are normally not visible, still needs to be fixed. ------------------------------------------------------------------------------ SYMBOLS USED, TIME SCALES, RELATIONSHIPS AND ADJUSTMENTS G4 = Generation 4 JD = Julian Date corresponding to a given Date/Time/Zone JD Num = Julian Day Number = Calendar date serial number corresponding to JD = floor(JD + 0.5) LT = Local (Clock) Time = UT + (TZ) TZ = Local Time Zone Offset From UT (Neg|Pos = West|East) ±00:00 = UT UT = Universal Time = LT − (TZ) Where: UT means UT1 if Year < 1962 (Up to 1961) or UT means UTC if Year > 1961 (From 1962 onward) DT = Delta T = TT − UT TT = TDB = Terrestrial (Barycentric Dynamical) Time = UT + (DT) TAI = International Atomic Time = TT − 00:00:32.184 ----------------------------- DAYLIGHT SAVING / SUMMER TIME There are many places where Daylight Saving or Summer Time is not observed. Hawaii is one of them. To account for Daylight Saving or Summer Time, we simply need to reduce the standard Time Zone offset by 1 hour. For example, in New York City, when Standard Time is in effect, the standard time zone difference between universal time (UT) and local time (LT) is UT − LT = −5 hours (West of Greenwich). A negative Time Zone offset means west of Greenwich and a positive value means east of Greenwich. An offset of 00:00 is the same as UT. -5 hours means that New York City local time (LT) is 5 hours behind UT, so we have to add 5 hours to local time to obtain the correspon- ding UT for the same moment. However, when Daylight Saving Time is in effect and we set the clocks ahead by one hour, the difference between UT and LT becomes one hour less, or −4 hours instead of the standard difference of −5 hours. When Standard Time is in effect: New York City Standard Time + 5 hours = UT When Daylight Saving Time is in effect: New York City Daylight Saving Time + 4 hours = UT The above also applies to other places that observe Daylight Saving Time as well. ----------------------------------------- RADIAL VELOCITY OF BODY RELATIVE TO EARTH Every solar system body is in motion relative to Earth and is either moving towards or away from Earth at any given moment. The radius vector is the geocentric distance between the body and Earth and the radial velocity is the rate at which this distance between the body and Earth is either decreasing or increasing at any given moment along this interconnecting line. A Negative Value = Body moving towards Earth = Distance decreasing and A Positive Value = Body moving away from Earth = Distance increasing Only at the moments of perigee and apogee, does the radial velocity equate to zero momentarily before reversing trend. ---------------- LUNAR IMAGE SIZE The size of the lunar phase image varies with the lunar distance, even though the difference is subtle and not easily noticeable. The percent of average or mean size is based on a mean distance of 384400 km, with a mean angular diameter of 1779.59415" = 100.000 percent at that dist- ance. ------------------- EPHEMERIS TIME SPAN Not all of the ephemerides span the same interval. Some ephemerides span a longer or shorter time period than others, depending on the selected body. The ephemeris span will be indicated when a body name is entered. ------- COOKIES This program uses a cookie. The sole purpose of the cookie is to remember the interface settings between calls. If you navigate to another page and return later, the cookie will recall all the previous settings and restore them unless the cookie has been deleted. It is NOT a tracking cookie and in no way compromises user security. The cookie automatically expires in exactly 30 days from the moment of creation if not refreshed before then. The cookie is refreshed on each program call unless deleted between calls, in which case, the interface values will revert back to the initial default values.
Program by Jay Tanner
Revised: Thursday, January 01, 1970 at 12:00:00 AM UTC