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 from webgeocalc DistanceFinder Aphelion of 2023: 2023-07-06 20:06:38.435260 UTC similarly, periphelion of 2023: 2023-01-04 16:17:27.532134 UTC IMCCE: slowest orbital speed is on aphelion? de-mythstified:  According to Kepler's laws , AMS >> Yes.  But by observation >> Sort of: 10 July in 2023(sqrt(dx^2+dy^2)): IERS dx: dy: 60135 is modified Julian date,  Keisan   Solar Distance can be found by JPL SSD , reading AD (Apoapsis distance) column, time is in TDB   Reference: IMCCE perihelion 2023 IMCCE aphelion 2023   earthscience stackexchange and python script( less than 15 sec of deviation)  Jay Tanner PHP GSFC Earth fact sheet Better than 1 minute resolution  , UTC2TDB  online convertor

 There are many useful tools, and various  SPICE kernel is selectable Webgeocalc one of them is: Angular separation  finder Eg: can use this for lunar eclipse. the result is geometrical, not taking into account of earth’s atmosphere and shadow do not have a clear edge On 2022 Nov 8 Moon , earth from observer sun: Minimum at 10:51 UTC solar eclipse 2022 oct 25 11::00:42  UTC  1.03603818