Run Time: 35 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 2019-Nov-14-Thu 14:36:57 LT Local Time Zone UTC+00:00:00 JD 2458802.10979378 TT Delta T +00:01:09 ------------------------------------------------------------------------------ Right Distance Visual Ascension Declination Light_Time Magn Ang_Diameter ---------------- ---------------- ------------------ ------ -------------- 15h 17m 59.956s -18° 14' 37.253" 0.989353193120 AU -26.77 0.5388733250° 15.2999879 h -18.2436813° 148,005,131 km 32.332400' 229° 29' 59.347" 91,966,125 mi 1939.94397" 229.4998185° 08m 13.692 s 0° 32' 19.944" ------------------------------------------------------------------------------ Radial Velocity of Sun Relative to Earth −Neg = Towards +Pos = Away -0.3849947 km/s = -1385.98092 km/h towards Earth = -0.2392246 mi/s = -861.20862 mi/h towards Earth ------------------------------------------------------------------------------ ============================================================================== Calendar Date Time Julian Date JD Number --------------- ----------- ---------------- ----------- Local Date/Time 2019-Nov-14-Thu 14:36:57 LT 2458802.10899305 2458802 LT Local Time Zone +00:00:00 TZ +0.00000000 UTC 2019-Nov-14-Thu 14:36:57 UTC 2458802.10899305 2458802 UTC Delta T +00:01:09 DT +0.00080073 Astronomical TT 2019-Nov-14-Thu 14:38:06 TT 2458802.10979378 2458802 TT TAI Adjustment -00:00:32.184 -0.00037250 Atomic Time TAI 2019-Nov-14-Thu 14:37:34 TAI 2458802.10942128 2458802 TAI Horizons Delta T +69.182691s +00:01:09.183 ----> +00:01:09
=================================================================================================== For Numerical Reference: SUN 2019-Nov-14-Thu 14:36:57 LT Time Zone UTC+00:00 Working Julian Date ---> 2458802.10979378 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 ========= ========== =========== =============== =========== ====== ======= ========== ============ 2458799.5 15.1226751 -17.5475427 00.989948464466 -00.4047502 -26.76 100.000 1938.77700 +0069.182644 2458800.0 15.1565206 -17.6836287 00.989832118562 -00.4010330 -26.76 100.000 1939.00500 +0069.182653 2458800.5 15.1904253 -17.8184414 00.989716852862 -00.3972708 -26.76 100.000 1939.23100 +0069.182662 2458801.0 15.2243893 -17.9519678 00.989602678696 -00.3934752 -26.76 100.000 1939.45500 +0069.182670 2458801.5 15.2584128 -18.0841953 00.989489603918 -00.3896587 -26.77 100.000 1939.67700 +0069.182679 2458802.0 15.2924957 -18.2151108 00.989377632717 -00.3858343 -26.77 100.000 1939.89600 +0069.182689 2458802.5 15.3266382 -18.3447017 00.989266765483 -00.3820151 -26.77 100.000 1940.11400 +0069.182698 2458803.0 15.3608402 -18.4729551 00.989156998712 -00.3782149 -26.77 100.000 1940.32900 +0069.182707 2458803.5 15.3951017 -18.5998582 00.989048324975 -00.3744472 -26.77 100.000 1940.54200 +0069.182716 2458804.0 15.4294226 -18.7253980 00.988940732946 -00.3707254 -26.77 100.000 1940.75300 +0069.182726 2458804.5 15.4638029 -18.8495616 00.988834207487 -00.3670624 -26.77 100.000 1940.96200 +0069.182735
====================================================================================================================== SUN - 2019 Nov 1 to Nov 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 --------- --------------- ----------- ----------- --------------- ----------- ------ ------- ----------- ------------- 2458785.5 2019-Oct-29-Tue 212.9731182 -13.2747019 0.993531482627 -0.4647087 -26.76 100.000 1931.786000 +69.182441 2458786.0 2019-Oct-29-Tue 213.4572338 -13.4409085 0.993397336460 -0.4643491 -26.76 100.000 1932.046000 +69.182447 2458786.5 2019-Oct-30-Wed 213.9421455 -13.6062339 0.993263308400 -0.4638879 -26.76 100.000 1932.307000 +69.182453 2458787.0 2019-Oct-30-Wed 214.4278566 -13.7706631 0.993129430066 -0.4633098 -26.76 100.000 1932.568000 +69.182459 2458787.5 2019-Oct-31-Thu 214.9143698 -13.9341811 0.992995737065 -0.4626025 -26.76 100.000 1932.828000 +69.182466 2458788.0 2019-Oct-31-Thu 215.4016881 -14.0967731 0.992862268117 -0.4617567 -26.76 100.000 1933.088000 +69.182472 2458788.5 2019-Nov-01-Fri 215.8898145 -14.2584241 0.992729064217 -0.4607660 -26.76 100.000 1933.347000 +69.182478 2458789.0 2019-Nov-01-Fri 216.3787520 -14.4191193 0.992596167876 -0.4596261 -26.76 100.000 1933.606000 +69.182485 2458789.5 2019-Nov-02-Sat 216.8685039 -14.5788439 0.992463622462 -0.4583353 -26.76 100.000 1933.864000 +69.182492 2458790.0 2019-Nov-02-Sat 217.3590734 -14.7375833 0.992331471658 -0.4568932 -26.76 100.000 1934.122000 +69.182498 2458790.5 2019-Nov-03-Sun 217.8504640 -14.8953227 0.992199759029 -0.4553009 -26.76 100.000 1934.378000 +69.182505 2458791.0 2019-Nov-03-Sun 218.3426793 -15.0520477 0.992068527698 -0.4535602 -26.76 100.000 1934.634000 +69.182512 2458791.5 2019-Nov-04-Mon 218.8357230 -15.2077438 0.991937820108 -0.4516740 -26.76 100.000 1934.889000 +69.182519 2458792.0 2019-Nov-04-Mon 219.3295988 -15.3623969 0.991807677871 -0.4496452 -26.76 100.000 1935.143000 +69.182526 2458792.5 2019-Nov-05-Tue 219.8243106 -15.5159925 0.991678141662 -0.4474773 -26.76 100.000 1935.396000 +69.182533 2458793.0 2019-Nov-05-Tue 220.3198622 -15.6685166 0.991549251167 -0.4451737 -26.76 100.000 1935.647000 +69.182541 2458793.5 2019-Nov-06-Wed 220.8162574 -15.8199551 0.991421045048 -0.4427380 -26.76 100.000 1935.898000 +69.182548 2458794.0 2019-Nov-06-Wed 221.3135000 -15.9702941 0.991293560926 -0.4401739 -26.76 100.000 1936.147000 +69.182556 2458794.5 2019-Nov-07-Thu 221.8115937 -16.1195196 0.991166835363 -0.4374850 -26.76 100.000 1936.394000 +69.182563 2458795.0 2019-Nov-07-Thu 222.3105424 -16.2676179 0.991040903838 -0.4346752 -26.76 100.000 1936.640000 +69.182571 2458795.5 2019-Nov-08-Fri 222.8103496 -16.4145753 0.990915800696 -0.4317485 -26.76 100.000 1936.885000 +69.182579 2458796.0 2019-Nov-08-Fri 223.3110190 -16.5603780 0.990791559088 -0.4287091 -26.76 100.000 1937.128000 +69.182586 2458796.5 2019-Nov-09-Sat 223.8125541 -16.7050127 0.990668210865 -0.4255618 -26.76 100.000 1937.369000 +69.182594 2458797.0 2019-Nov-09-Sat 224.3149583 -16.8484657 0.990545786459 -0.4223118 -26.76 100.000 1937.608000 +69.182602 2458797.5 2019-Nov-10-Sun 224.8182349 -16.9907238 0.990424314716 -0.4189649 -26.76 100.000 1937.846000 +69.182611 2458798.0 2019-Nov-10-Sun 225.3223870 -17.1317737 0.990303822709 -0.4155275 -26.76 100.000 1938.082000 +69.182619 2458798.5 2019-Nov-11-Mon 225.8274178 -17.2716022 0.990184335517 -0.4120070 -26.76 100.000 1938.316000 +69.182627 2458799.0 2019-Nov-11-Mon 226.3333299 -17.4101962 0.990065875984 -0.4084115 -26.76 100.000 1938.548000 +69.182636 2458799.5 2019-Nov-12-Tue 226.8401259 -17.5475427 0.989948464466 -0.4047502 -26.76 100.000 1938.777000 +69.182644 2458800.0 2019-Nov-12-Tue 227.3478083 -17.6836287 0.989832118562 -0.4010330 -26.76 100.000 1939.005000 +69.182653 2458800.5 2019-Nov-13-Wed 227.8563790 -17.8184414 0.989716852862 -0.3972708 -26.76 100.000 1939.231000 +69.182662 2458801.0 2019-Nov-13-Wed 228.3658397 -17.9519678 0.989602678696 -0.3934752 -26.76 100.000 1939.455000 +69.182670 2458801.5 2019-Nov-14-Thu 228.8761917 -18.0841953 0.989489603918 -0.3896587 -26.77 100.000 1939.677000 +69.182679 2458802.0 2019-Nov-14-Thu 229.3874361 -18.2151108 0.989377632717 -0.3858343 -26.77 100.000 1939.896000 +69.182689 2458802.5 2019-Nov-15-Fri 229.8995732 -18.3447017 0.989266765483 -0.3820151 -26.77 100.000 1940.114000 +69.182698 2458803.0 2019-Nov-15-Fri 230.4126031 -18.4729551 0.989156998712 -0.3782149 -26.77 100.000 1940.329000 +69.182707 2458803.5 2019-Nov-16-Sat 230.9265256 -18.5998582 0.989048324975 -0.3744472 -26.77 100.000 1940.542000 +69.182716 2458804.0 2019-Nov-16-Sat 231.4413397 -18.7253980 0.988940732946 -0.3707254 -26.77 100.000 1940.753000 +69.182726 2458804.5 2019-Nov-17-Sun 231.9570442 -18.8495616 0.988834207487 -0.3670624 -26.77 100.000 1940.962000 +69.182735 2458805.0 2019-Nov-17-Sun 232.4736376 -18.9723361 0.988728729801 -0.3634707 -26.77 100.000 1941.169000 +69.182745 2458805.5 2019-Nov-18-Mon 232.9911179 -19.0937084 0.988624277638 -0.3599617 -26.77 100.000 1941.374000 +69.182755 2458806.0 2019-Nov-18-Mon 233.5094825 -19.2136654 0.988520825570 -0.3565458 -26.77 100.000 1941.578000 +69.182765 2458806.5 2019-Nov-19-Tue 234.0287287 -19.3321941 0.988418345327 -0.3532324 -26.77 100.000 1941.779000 +69.182775 2458807.0 2019-Nov-19-Tue 234.5488536 -19.4492814 0.988316806186 -0.3500291 -26.77 100.000 1941.978000 +69.182785 2458807.5 2019-Nov-20-Wed 235.0698536 -19.5649141 0.988216175446 -0.3469418 -26.77 100.000 1942.176000 +69.182795 2458808.0 2019-Nov-20-Wed 235.5917250 -19.6790793 0.988116418947 -0.3439747 -26.77 100.000 1942.372000 +69.182806 2458808.5 2019-Nov-21-Thu 236.1144638 -19.7917639 0.988017501678 -0.3411296 -26.77 100.000 1942.567000 +69.182816 2458809.0 2019-Nov-21-Thu 236.6380654 -19.9029549 0.987919388440 -0.3384058 -26.77 100.000 1942.760000 +69.182827 2458809.5 2019-Nov-22-Fri 237.1625251 -20.0126394 0.987822044577 -0.3358003 -26.77 100.000 1942.951000 +69.182838 2458810.0 2019-Nov-22-Fri 237.6878375 -20.1208048 0.987725436746 -0.3333070 -26.77 100.000 1943.141000 +69.182848 2458810.5 2019-Nov-23-Sat 238.2139967 -20.2274383 0.987629533733 -0.3309171 -26.77 100.000 1943.330000 +69.182859 2458811.0 2019-Nov-23-Sat 238.7409963 -20.3325274 0.987534307248 -0.3286193 -26.77 100.000 1943.517000 +69.182870 2458811.5 2019-Nov-24-Sun 239.2688292 -20.4360596 0.987439732705 -0.3263994 -26.77 100.000 1943.703000 +69.182881 2458812.0 2019-Nov-24-Sun 239.7974876 -20.5380227 0.987345789919 -0.3242410 -26.77 100.000 1943.888000 +69.182893 2458812.5 2019-Nov-25-Mon 240.3269629 -20.6384045 0.987252463694 -0.3221260 -26.77 100.000 1944.072000 +69.182904 2458813.0 2019-Nov-25-Mon 240.8572458 -20.7371927 0.987159744259 -0.3200352 -26.77 100.000 1944.255000 +69.182915 2458813.5 2019-Nov-26-Tue 241.3883262 -20.8343753 0.987067627531 -0.3179484 -26.77 100.000 1944.436000 +69.182927 2458814.0 2019-Nov-26-Tue 241.9201936 -20.9299404 0.986976115190 -0.3158460 -26.77 100.000 1944.616000 +69.182939 2458814.5 2019-Nov-27-Wed 242.4528366 -21.0238761 0.986885214553 -0.3137088 -26.77 100.000 1944.795000 +69.182950 2458815.0 2019-Nov-27-Wed 242.9862437 -21.1161704 0.986794938288 -0.3115189 -26.77 100.000 1944.973000 +69.182962 2458815.5 2019-Nov-28-Thu 243.5204029 -21.2068117 0.986705303972 -0.3092602 -26.77 100.000 1945.150000 +69.182974 2458816.0 2019-Nov-28-Thu 244.0553020 -21.2957882 0.986616333540 -0.3069188 -26.77 100.000 1945.325000 +69.182986 2458816.5 2019-Nov-29-Fri 244.5909287 -21.3830885 0.986528052678 -0.3044826 -26.77 100.000 1945.500000 +69.182998 2458817.0 2019-Nov-29-Fri 245.1272707 -21.4687012 0.986440490174 -0.3019421 -26.77 100.000 1945.672000 +69.183010 2458817.5 2019-Nov-30-Sat 245.6643157 -21.5526151 0.986353677297 -0.2992897 -26.77 100.000 1945.843000 +69.183022 2458818.0 2019-Nov-30-Sat 246.2020515 -21.6348193 0.986267647201 -0.2965199 -26.77 100.000 1946.013000 +69.183034 2458818.5 2019-Dec-01-Sun 246.7404661 -21.7153029 0.986182434407 -0.2936287 -26.77 100.000 1946.181000 +69.183046 2458819.0 2019-Dec-01-Sun 247.2795472 -21.7940554 0.986098074344 -0.2906137 -26.77 100.000 1946.348000 +69.183058 2458819.5 2019-Dec-02-Mon 247.8192830 -21.8710666 0.986014602979 -0.2874736 -26.77 100.000 1946.513000 +69.183071 2458820.0 2019-Dec-02-Mon 248.3596614 -21.9463264 0.985932056524 -0.2842080 -26.77 100.000 1946.676000 +69.183083 2458820.5 2019-Dec-03-Tue 248.9006704 -22.0198250 0.985850471210 -0.2808170 -26.77 100.000 1946.837000 +69.183096 2458821.0 2019-Dec-03-Tue 249.4422981 -22.0915528 0.985769883128 -0.2773015 -26.77 100.000 1946.996000 +69.183108 --------- --------------- ----------- ----------- --------------- ----------- ------ ------- ----------- ------------- 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 - 2019 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: Wednesday, November 06, 2019 at 06:56:37 AM UTC