Earth Aphelion and Perihelion CalculatorFor Gregorian Years 1600 to 2200 This program uses a cookie to store and remember the interface settings between calls. This program computes the local date and time of aphelion and perihelion of the Earth for any given Gregorian year from 1600 to 2200.  To obtain the local times, the ΔT (Delta T) estimate is applied to the time zone adjustment , according to the NASA polynomials for Delta T. Year (1600 to 2200) =            Local Time = UT  :         PERIHELION of 2018 (Local Std. Time = UTC-05:00, Applied Delta T = +00:01:11) 2018 Jan 03 - Earth at perihelion at local time 00:34:25 PERIHELION DISTANCE, GEOCENTRIC EQUATORIAL COORDINATES and ORBITAL SPEED Min Distance = 0.983284266 AU = 147.097232 Mkm = 91.401983 Mmi Right Ascension = 18h 55m 33s = 18.925914232h = 283.888713475° Declination = -22° 49' 15" = -22.820831516° Orbital Speed = 30.287 km/sec = 109032 km/h = 18.819 mi/sec = 67750 mi/h ================================================================================ APHELION of 2018 (Local Std. Time = UTC-05:00, Applied Delta T = +00:01:11) 2018 Jul 06 - Earth at aphelion at local time 11:46:42 APHELION DISTANCE, GEOCENTRIC EQUATORIAL SOLAR COORDINATES and ORBITAL SPEED Max Distance = 1.016696057 AU = 152.095565 Mkm = 94.507803 Mmi Right Ascension = 07h 03m 15s = 7.054186664h = 105.812799963° Declination = +22° 38' 21" = 22.639119581° Orbital Speed = 29.291 km/sec = 105449 km/h = 18.201 mi/sec = 65523 mi/h ================================================================================ Perihelion to Aphelion Interval = 184.4668634 days = 184d 11:12:17 ================================================================================ A PHP Astronomy Program by Jay Tanner - 2018