Mercury Perigees and Apogees Calculator For the 9799-Year Span From  200 AD  to  9998 AD Built Around the NASA/JPL Horizons API PHP Horizons Interface by Jay Tanner

Year                    Time Zone  UTC  Optional Location Label

Double-Click Within Text Area to Select ALL Text =========================================================================== ALL MERCURY PERIGEES AND APOGEES FOR THE YEAR 2026 ================================================== Time Zone UTC+00:00 Dates refer to the modern Gregorian calendar. ======================================================================== EVENT Julian Date UTC Calendar Date Time UTC Dist. AU/mi/km ------- ----------------- --------------- ----------- ---------------- Apogee 2461055.468071792 2026-Jan-14-Wed 11:14:01 PM 1.4304028950720 132,964,256 mi 213,985,227 km Perigee 2461109.960816868 2026-Mar-10-Tue 11:03:35 AM 0.6181275924029 57,458,549 mi 92,470,572 km Apogee 2461173.505773032 2026-May-13-Wed 12:08:19 AM 1.3244852512056 123,118,596 mi 198,140,173 km Perigee 2461231.791310448 2026-Jul-10-Fri 06:59:29 AM 0.5686605398231 52,860,300 mi 85,070,406 km Apogee 2461286.411845536 2026-Sep-02-Wed 09:53:03 PM 1.3781756067756 128,109,426 mi 206,172,136 km Perigee 2461348.065023591 2026-Nov-03-Tue 01:33:38 PM 0.6725549488572 62,517,888 mi 100,612,788 km Apogee 2461402.986837998 2026-Dec-28-Mon 11:41:03 AM 1.4439283507312 134,221,525 mi 216,008,607 km ======================================================================== NOTE: As one can plainly see, in the case of Mercury, there are multiple perigee/apogee events per calendar year, as many as three of each and sometimes one extra event. For the perigee/apogee events of the year, we could choose the lowest perigee and the largest apogee values of the year. Mercury is constantly moving either towards or away from Earth, except at the perigee/apogee points, where it momentarily stands still, then its radial distance reverses trend.

Double-Click Within Text Area to Select ALL Text NOTES: [1] This Mercury perigee and apogee calculator spans the 9799 year period from 200 AD to 9998 AD. It was written in PHP v7.4.9 and makes internal calls to the NASA/JPL Horizons API v1.1 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] 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. [4] 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. [5] 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. For example, if using the time zone offset for India, putting 'New York City, USA' as the location, would be rather absurd and an inaccurate match between location name and time zone. The label can consist of any printable plain-text string and defaults to 'Greenwich, England' at Time Zone Offset +00:00. [6] 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 will refresh the cookie for up to 7 days retention unless deleted sooner. There is no harm in deleting the cookie. The program will simply revert to the original default values.

Download PHP 7 Source Code For This Program Program by Jay Tanner Revised: Friday - March 03, 2023 at 01:47:42 UTC - PHP v7.4.9