Nicelli Alberto wrote: > Hi all brothers dialists! > Who knows the exact time and the exact ecliptic longitude of the > earth's perihelion ?
The time(s) of perihelion and the other three principle orbital
positions can be found at the following URL:
http://aa.usno.navy.mil/AA/data/docs/EarthSeasons.html
The USNO Astronomical Almanac in section C has the necessary formula
to compute Ecliptic Longitude, Meeus is another excellent reference.
Regards,
Luke Coletti
