posted March 05, 2018 09:02 AM            

quote:

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Originally posted by SecretGeek:
It takes into consideration the altitude of a specific birth place. So if it were on Mount Everest, the angle to a body might deviate.

"Neglecting the altitude can result in an error of about 2 arc seconds with the moon and at an altitude 3000 m." http://www.astro.com/swisseph/swephprg.htm#_Toc505244884

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posted March 12, 2018 02:17 AM            

quote:

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Originally posted by MoonMystic:
I keep seeing the box but until
just now never tried it. The only
difference I could see was my Moon
was nudged slightly fwd. Anyone
know anything about this option and
how it might be of use? Thanks!

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In no way is this a 'beginner' level question, but okay ...

Topocentric is a fine tuning of geocentric. It compensates for the parallax Moon effect, which is why the difference is most noticeable for the Moon. Normally the Moon is measured mid-geocenter with a line through the center of the Moon. With topocentric the Moon's position is measured from the locale (birth place). It can change the angle of the line through the Moon's center, thus its position relative to the equinoxes/tropical zodiac. This is far more important than anything written there about altitude, which is basically insignificant. The difference we're talking about with the Moon's position is minutes of arc, even a degree or more, not mere seconds of arc.

People who use this system say it is more accurate. I agree it 'should' be more accurate, but I cannot yet verify that it actually is in the dynamics of radix or progressions.

posted May 09, 2018 02:05 PM            

quote:

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Originally posted by Kannon McAfee:
In no way is this a 'beginner' level question, but okay ...

Topocentric is a fine tuning of geocentric. It compensates for the parallax Moon effect, which is why the difference is most noticeable for the Moon. Normally the Moon is measured mid-geocenter with a line through the center of the Moon. With topocentric the Moon's position is measured from the locale (birth place). It can change the angle of the line through the Moon's center, thus its position relative to the equinoxes/tropical zodiac. This is far more important than anything written there about altitude, which is basically insignificant. The difference we're talking about with the Moon's position is minutes of arc, even a degree or more, not mere seconds of arc.

People who use this system say it is more accurate. I agree it 'should' be more accurate, but I cannot yet verify that it actually is in the dynamics of radix or progressions.

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