Lunar Perigee and Apogee Calculator For the 8999 Year Span From  1000 AD  to  9998 AD Built Around the NASA/JPL Horizons API PHP Program by Jay Tanner

Year                    Time Zone  UTC                   Distance Units Optional Location Label

Double-Click Within Text Area to Select ALL Text ALL LUNAR PERIGEES AND APOGEES FOR THE YEAR 2026 ================================================ Time Zone UTC+00:00 Greenwich, England Dates refer to the modern Gregorian calendar. =================================================================== EVENT Julian Date UTC Calendar Date Time UTC Dist. km ======= ================= =============== =========== ========== Perigee 2461042.410752280 2026-Jan-01-Thu 09:51:29 PM 360360.913 Apogee 2461054.370007814 2026-Jan-13-Tue 08:52:49 PM 405404.813 Perigee 2461070.412782768 2026-Jan-29-Thu 09:54:24 PM 365894.243 Apogee 2461082.203978855 2026-Feb-10-Tue 04:53:44 PM 404536.976 Perigee 2461096.470329639 2026-Feb-24-Tue 11:17:16 PM 370171.778 Apogee 2461110.070744221 2026-Mar-10-Tue 01:41:52 PM 404344.593 Perigee 2461121.980259274 2026-Mar-22-Sun 11:31:34 AM 366883.638 Apogee 2461137.851547776 2026-Apr-07-Tue 08:26:14 AM 404935.480 Perigee 2461149.783599591 2026-Apr-19-Sun 06:48:23 AM 361645.606 Apogee 2461165.430770318 2026-May-04-Mon 10:20:19 PM 405815.515 Perigee 2461178.067746652 2026-May-17-Sun 01:37:33 PM 358081.898 Apogee 2461192.678509072 2026-Jun-01-Mon 04:17:03 AM 406359.499 Perigee 2461206.467578595 2026-Jun-14-Sun 11:13:19 PM 357195.384 Apogee 2461219.789563051 2026-Jun-28-Sun 06:56:58 AM 406277.732 Perigee 2461234.826528612 2026-Jul-13-Mon 07:50:12 AM 359102.939 Apogee 2461247.192663817 2026-Jul-25-Sat 04:37:26 PM 405575.128 Perigee 2461262.965563349 2026-Aug-10-Mon 11:10:25 AM 363265.317 Apogee 2461274.845104412 2026-Aug-22-Sat 08:16:57 AM 404678.008 Perigee 2461290.357367821 2026-Sep-06-Sun 08:34:37 PM 368228.334 Apogee 2461302.625043993 2026-Sep-19-Sat 03:00:04 AM 404260.633 Perigee 2461315.374689570 2026-Oct-01-Thu 08:59:33 PM 369300.832 Apogee 2461330.457597742 2026-Oct-16-Fri 10:58:56 PM 404680.604 Perigee 2461342.259578780 2026-Oct-28-Wed 06:13:48 PM 364386.434 Apogee 2461358.248267015 2026-Nov-13-Fri 05:57:30 PM 405649.543 Perigee 2461370.380700018 2026-Nov-25-Wed 09:08:12 PM 359336.037 Apogee 2461385.790856330 2026-Dec-11-Fri 06:58:50 AM 406436.071 Perigee 2461398.859567443 2026-Dec-24-Thu 08:37:47 AM 356647.656 ======= ================= =============== =========== ========== EVENT Julian Date UTC Calendar Date Time UTC Dist. km ===================================================================

Double-Click Within Text Area to Select ALL Text NOTES: [1] This program is written in PHP v7.4.9 and makes internal calls to the NASA/JPL Horizons API v1.1 This lunar perigee and apogee ephemeris calculator spans some 8999 years from 1000 AD to 9998 AD. Julian Dates (JD) and Calendar Dates: JD < 2299160.5 = Refers to Old-Style Julian Calendar Dates JD >= 2299160.5 = Refers to Modern Gregorian Calendar Dates Given JD = General Julian Date, then the Julian Day Number on the Calendar is JD Number = floor(JD + 0.5) Dates up to 1582-Oct-04-Thu refer to the Julian calendar. Dates from 1582-Oct-15-Fri refer to the Gregorian calendar. Technically speaking, there are no calendar dates in the range from 1582-Oct-05-Fri to 1582-Oct-14-Sun because those 10 dates were dropped from the calendar during the Julian to Gregorian calendar transition to bring dates of the seasons back into alignment with the sun and the rule for leap year was changed to prevent the previous calendar error from recurring. The date following 1582-Oct-04-Thu was 1582-Oct-15-Fri, the official first date on our modern Gregorian calendar system. [2] Occasionally a time-out may occur if the JPL Horizons server is temporarily unavailable or too busy and an error occurs. If such a crash or hang-up does occur, simply refresh and try again. [3] If a perigee or apogee event occurs near the beginning of a month, that month may have two perigees or two apogees, but never two of both. This is because the lunar orbital months, about 27.32 days, are shorter than the calendar months which range from 28 to 31 days. In some rare cases it is possible for February to have only one single event during the month such as only one perigee or one apogee but not both. [4] UT1 = Old Universal Time Scale - Solar based. Old previous UT time scale used for years up to 1961. UTC = Coordinated Universal Time Scale - Atomic based. Newer UT time scale used from 1962 to date. World times are now based on this standard. LT = Local Time for the given time zone based on the given +/− HH:MM offset. Time Zone Offset Convention: West of Greenwich, time zone offsets are negative. East of Greenwich, time zone offsets are positive. [5] Standard times are assumed. To adjust for Daylight Saving or Summer Time, add 1 hour to the standard times taking care to watch for any change of date -OR- subtract 1 hour from the time zone offset, which will automatically handle any date change. For example, the time zone offset for Eastern Standard Time (EST) is normally -5 hours. However, when Eastern Daylight Time (EDT) is in effect, use a time zone offset of -4 hours instead. The computed times will be in EDT and automatically handle any date changes. [6] There is an optional location label that can be applied to the computed table for reference. However, any label should match the indicated time zone so as to be accurate and make sense. The label can consist of any printable plain-text string and defaults to 'Greenwich, England' at Time Zone Offset +00:00. [7] This program implements a cookie to store and recall the year and other interface settings between calls. It does not track, monitor or perform any other activity. If you navigate away and come back later, the interface settings stored in the cookie will be recalled from your last visit. Each call refreshes the cookie for up to 7 days recall. *************************************************************** *************************************************************** API VERSION: 1.1 API SOURCE: NASA/JPL Horizons API *************************************************************** Revised: July 31, 2013 Moon / (Earth) 301 GEOPHYSICAL DATA (updated 2018-Aug-15): Volumetric mean radius = 1737.53 km +- 0.03 Radius (gravity) = 1738.0 km Radius (IAU) = 1737.4 km Semi-major axis, a = 384400 km Mean angular diameter = 31' 05.2" Mass = 7.349E+22 kg Earth/Moon mass ratio = 81.3005690769 Density = 3.3437 g/cm^3 Mean crustal density = 2.97 +- 0.07 g/cm^3 Surface acceleration = 1.62 m/s^2 V(1,0) = +0.21 Geometric Albedo = 0.12 Surface emissivity = 0.92 Sidereal rot. rate = 0.0000026617 rad/s Orbital period = 27.321582 days Mean solar day = 29.5306 days Apsidal period = 3231.50 days Nodal period = 6798.38 days Mean motion = 0.0000026616995 rad/s Eccentricity = 0.05490 Inclination = 5.145 deg Obliquity to orbit = 6.67 deg GM = 4902.800066 km^3/s^2 GM 1-sigma = +- 0.0001 km^3/s^2 Farside crust. thick. = ~80 to 90 km Nearside crust. thick. = 58 +- 8 km Heat flow, Apollo 15 = 3.1 +- 0.6 mW/m^2 Heat flow, Apollo 17 = 2.2 +- 0.5 mW/m^2 Perihelion Aphelion Mean Solar Constant (W/m^2) 1414 +- 7 1323 +- 7 1368 +- 7 Maximum Planetary IR 1314 1226 1268 Minimum Planetary IR 5.2 5.2 5.2 ***************************************************************

Download PHP Source Code For This Program Program by Jay Tanner Revised: Thursday, January 01, 1970 at 12:00:00 AM UTC - PHP v7.4.9