Earth - Perihelion and Aphelion Calculator

Earth Perihelion and Aphelion Calculator
For the 9799-Year Span From 200 AD to 9998 AD
Built Around the NASA/JPL Horizons API
PHP Program by Jay Tanner

Year Time Zone UTC

Optional Location Label

View/Copy PHP Source Code

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===========================================================================
                EARTH PERIHELION AND APHELION FOR THE YEAR 2025
                ===============================================
                Time Zone UTC+00:00
                

                Dates refer to the modern Gregorian calendar.

===========================================================================
   EVENT    Julian Date UTC   Calendar Date     Time UTC    Dist. AU/mi/km
---------- ----------------- ---------------  -----------  ----------------
Perihelion 2460680.061303796 2025-Jan-04-Sat  01:28:17 PM   0.9833273774820
                                                              91,405,990 mi
                                                             147,103,682 km
                                                  Light Time 00h 08m 10.69s

Aphelion   2460860.329796071 2025-Jul-03-Thu  07:54:54 PM   1.0166437510543
                                                              94,502,941 mi
                                                             152,087,740 km
                                                  Light Time 00h 08m 27.31s
===========================================================================

Event(s) listed may not occur on the same date in another time zone.

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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.


[2] This Earth perihelion and aphelion calculator spans the 9799
    year period from 200 AD to 9998 AD.

    It was written in PHP 7.4.9 and makes background calls to the
    JPL Horizons API.  If run on a desktop server, it will need a
    connection to the Internet to access the API.


[3] 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.



[4] 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.



[5] 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.

Program by Jay Tanner
Revised: Sunday - November 09, 2025 at 06:47:30 UTC - PHP 7.4.9