Lunar Perigees and Apogees 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 For the Given Time Zone

Double-Click Within Text Area to Select ALL Text ALL LUNAR PERIGEES AND APOGEES FOR THE YEAR 2023 ================================================ Time Zone UTC+00:00 Dates refer to the modern Gregorian calendar. =================================================================== EVENT Julian Date UTC Calendar Date Time UTC Dist. km ======= ================= =============== =========== ========== Apogee 2459952.877552730 2023-Jan-08-Sun 09:03:41 AM 406447.430 Perigee 2459966.368594548 2023-Jan-21-Sat 08:50:47 PM 356569.118 Apogee 2459979.860500391 2023-Feb-04-Sat 08:39:07 AM 406486.628 Perigee 2459994.874368317 2023-Feb-19-Sun 08:59:05 AM 358259.302 Apogee 2460007.244173729 2023-Mar-03-Fri 05:51:37 PM 405915.017 Perigee 2460023.128446883 2023-Mar-19-Sun 03:04:58 PM 362679.604 Apogee 2460034.967410885 2023-Mar-31-Fri 11:13:04 AM 404954.800 Perigee 2460050.593898684 2023-Apr-16-Sun 02:15:13 AM 367939.195 Apogee 2460062.779408722 2023-Apr-28-Fri 06:42:21 AM 404338.710 Perigee 2460075.716141894 2023-May-11-Thu 05:11:15 AM 369308.655 Apogee 2460090.570438112 2023-May-26-Fri 01:41:26 AM 404546.831 Perigee 2460102.468020778 2023-Jun-06-Tue 11:13:57 PM 364839.116 Apogee 2460118.275607773 2023-Jun-22-Thu 06:36:53 PM 405415.961 Perigee 2460130.438945961 2023-Jul-04-Tue 10:32:05 PM 360136.621 Apogee 2460145.797570158 2023-Jul-20-Thu 07:08:30 AM 406307.142 Perigee 2460158.748981846 2023-Aug-02-Wed 05:58:32 AM 357306.651 Apogee 2460173.007198753 2023-Aug-16-Wed 12:10:22 PM 406634.820 Perigee 2460187.167158678 2023-Aug-30-Wed 04:00:43 PM 357184.729 Apogee 2460200.163049440 2023-Sep-12-Tue 03:54:47 PM 406272.538 Perigee 2460215.545649743 2023-Sep-28-Thu 01:05:44 AM 359923.618 Apogee 2460227.658292791 2023-Oct-10-Tue 03:47:56 AM 405393.983 Perigee 2460243.631911155 2023-Oct-26-Thu 03:09:57 AM 364894.309 Apogee 2460255.410625152 2023-Nov-06-Mon 09:51:18 PM 404530.188 Perigee 2460270.380603179 2023-Nov-21-Tue 09:08:04 PM 369853.717 Apogee 2460283.278698916 2023-Dec-04-Mon 06:41:20 PM 404305.734 Perigee 2460295.280230544 2023-Dec-16-Sat 06:43:32 PM 367929.596 ======= ================= =============== =========== ========== EVENT Julian Date UTC Calendar Date Time UTC Dist. km ===================================================================

NOTES: [1] 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. There are times when it gets a bit glitchy and it can be tricky to determine if it's the program or the JPL server where the problem lies. Patience is key. [2] This lunar perigee and apogee ephemeris calculator spans some 8999 years from 1000 AD to 9998 AD. The program is written in PHP v7.4.9 and makes internal calls to the NASA/JPL Horizons API v1.1 [3] Julian Dates, Day Numbers and Calendar Dates: 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 Dates up to 1582-Oct-04-Thu refer to the Julian calendar. Dates from 1582-Oct-15-Fri refer to the Gregorian calendar. The date following 1582-Oct-04-Thu was 1582-Oct-15-Fri, the official first date on our modern Gregorian calendar system. 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. Given JD = General Julian Date, then the Julian Day Number corresponding to that date on the calendar is: JDNum = floor(JD + 0.5) The Julian Day Number is always a positive integer value serving as a unique serial number for every date on the calendar and holds the calendar date and the day of the week information. The Julian Date holds the calendar date and the day of the week with the fractional part holding the time of day information. For the day of the week (DoW) index corresponding to any Julian Date (JD), or Julian Day Number (JDNum), let the day of the week be indicated by a numerical index DoW in the range from 0=Sun to 6=Sat. DoW = (floor(JD + 0.5) + 1) mod 7 or DoW = (JDNum + 1) mod 7 Where DoW: 0=Sun, 1=Mon, 2=Tue, 3=Wed, 4=Thu, 5=Fri and 6=Sat The JDNum and DoW formulas apply to both the old Julian and the modern Gregorian calendar systems. [4] 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 and not both. [5] 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 scale used from 1962 to date. World times are now based on this standard with leap seconds applied to maintain civil time, based on atomic time, in close sync with the mean sun. 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. [6] 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. [7] 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' at Time Zone Offset UTC+00:00. [8] 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): ***************************************************************

Download PHP 7 Source Code For This Program Program by Jay Tanner Revised: Monday - March 27, 2023 at 05:16:27 UTC - PHP v7.4.9