Dear Elio,
Thank you again for your advice!
Yours,
Maxime
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Le 17/03/2023 à 09:38, Elio Fabri a écrit?:
I agree with you. I have not xephem installed and cannot verify, but apparently EcLong is what I named geocentric ecliptic longitude.
Of course EcLong is more strictly related with observations made from Earth, whereas HeLong is more simple geometrically and kinematically but not directly observable.
> Using only one “revolution” (and not ten as you advice), I already get
> a fair estimate of 699 days!
My example of ten revolutions was just to make clear what I meant by average.
I think you were lucky. I made no computation but expect that at other oppositions you could find differences of several days.
Of course, much also depends on how much time you can spend with your students on the subject.
Greetings
--
Maxime GOMMEAUX, ma?tre de conférences
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