VSOP87C Venus Apparent Geocentric Equatorial Ephemeris Stats PHP Program by Jay Tanner - 2024

Enter Calendar Date and Time TT      (Neg / Pos  =  BC / AD) DATE:  Year  Month  Day         Time TT

Double-Click Within Text Area to Select ALL Text =========================================================================== VSOP87C APPARENT GEOCENTRIC VENUS EPHEMERIS DEMO Valid For 8000 Years From 2000 BC to 6000 AD Dates before 1582-Oct-15 are reckoned according to the Julian Calendar. =========================================================================== For Gregorian Calendar Date and Time: AD 2024-Dec-30-Mon 17:12:12 TT Julian Date Value = 2460675.21680556 TT Julian Day Number = 2460675 Delta T = +74 sec = +00:01:14 This estimate is computed from the NASA Polynomial Expressions for Delta T, for reference, but not actually applied to the ephemeris computations. --------------------------------------------------------------------------- Venus VSOP87 Series C Raw Heliocentric Rectangular X,Y,Z Coordinates and Distance R '+0.47006931754787 +0.54855194914584 -0.01978830786641 0.72267972251879' --------------------------------------------------------------------------- Earth VSOP87 Series C Raw Heliocentric Rectangular X,Y,Z Coordinates and Distance R '-0.16247682176548 +0.96985900114557 +0.00000323609881 0.98337439448288' --------------------------------------------------------------------------- APPARENT VENUS GEOCENTRIC EQUATORIAL EPHEMERIS STATISTICS AND ECLIPITICAL COORDINATES For Gregorian Calendar Date and Time: AD 2024-Dec-30-Mon 17:12:12 TT Right Ascension = 21.939249700251 h = 21h 56m 21.30s Declination = -14.142784875597° = -14° 08' 34.03" Distance = 0.7602670292 AU = 113.7343287199 Mkm = 70.6712354350 Mmi Angular Diameter = 0.0061452403917047° = 22.123" Visual Magnitude = -4.35 Phase Angle = 83.033° Illuminated Disc = 56.065% Ecliptical Lon. = 326.32964911266° = 326° 19' 46.74" Ecliptical Lat. = -1.4919873857943° = -1° 29' 31.15"

SOME GENERAL INFORMATION ABOUT THIS VSOP87 VENUS EPHEMERIS DEMO The purpose of this program is SIMPLY to test the VSOP87C functions to see if they are returning the correct X,Y,Z values and if so, proceed to compute the full apparent geocentric equatorial Venus ephemeris statistics and ecliptical coordinates for the planet Venus at any moment within the 8000-year ephemeris span from 2000 BC to 6000 AD. ------- CAVEAT: Be cautious when entering the date and time values. This program is only a simplified demo and does NOT do extensive error checking for invalid arguments. Valid input arguments should return valid results. Whenever possible, compare against known check values or against another source of similar VSOP87C computations for consistency. ---------------- TIME SCALE USED: The program uses the system clock for the time (UTC). However, the actual time scale used is the TT scale. Without any Delta T adjustment, UTC is being treated as equivalent to TT. --------------------------------------------------------------------------- SOURCE CODE: There is a link below to the complete PHP source code for this program.

Program by Jay Tanner Revised: Thursday, January 01, 1970 at 12:00:00 AM UTC

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