Posted: Thu Apr 01, 2010 4:03 am
EdF:
No offense taken by your response. Remember the Local Apparent Time thread (which I started) a while back? You made insightful and informative posts in that discussion and I appreciate your expertise in this area. Basically what I was trying to find out in that thread is if the generally available computer programs on the internet (such as Astrodienst) automatically took into account LAT in making necessary time conversions in the final determination of zodiacal degrees in chart construction. At the end of that thread I came to believe that they did; then I found out from Astrodienst that LAT is not automatically taken into consideration: that local mean time is converted to standard time then to TT/UT, etc, but that the basis (starting point) of these conversions is the "clock time" convention.
I ask again, here, of an expert like you (and I use this term with sincerity): if on March 5 the LAT is 11 minutes slower than the "clock time", does the "machinery" of astrological calculations automatically account for this in the final chart erected from the time/place data? When on March 5 I asked a horary question, at "clock time" 12 noon, then punched that time (12 noon) into the Astrodienst chart erection internet computer, does that computer adjust the LAT of the question to 11:49 AM, then make the other time conversions eventually to sidereal time, etc, and show a chart taking all of this into account?
PS: I am not trying to make, or defend, some point here, nor attempting to be controversial: I would love it if you could tell me in fact that the ascendant degree which would be determined from ephemeris calculations based on the sundial at 11:49 am March 5th would be the same if I punched the "clock time" of 12 noon March 5th into the chart-generating computer program (such as the one on Astrodienst.com) That would settle the nagging question I have regarding whether, using civil time conventions ("clock time") we are deviating from what "really exists" in the natural world (the Sun's time)...
No offense taken by your response. Remember the Local Apparent Time thread (which I started) a while back? You made insightful and informative posts in that discussion and I appreciate your expertise in this area. Basically what I was trying to find out in that thread is if the generally available computer programs on the internet (such as Astrodienst) automatically took into account LAT in making necessary time conversions in the final determination of zodiacal degrees in chart construction. At the end of that thread I came to believe that they did; then I found out from Astrodienst that LAT is not automatically taken into consideration: that local mean time is converted to standard time then to TT/UT, etc, but that the basis (starting point) of these conversions is the "clock time" convention.
I ask again, here, of an expert like you (and I use this term with sincerity): if on March 5 the LAT is 11 minutes slower than the "clock time", does the "machinery" of astrological calculations automatically account for this in the final chart erected from the time/place data? When on March 5 I asked a horary question, at "clock time" 12 noon, then punched that time (12 noon) into the Astrodienst chart erection internet computer, does that computer adjust the LAT of the question to 11:49 AM, then make the other time conversions eventually to sidereal time, etc, and show a chart taking all of this into account?
PS: I am not trying to make, or defend, some point here, nor attempting to be controversial: I would love it if you could tell me in fact that the ascendant degree which would be determined from ephemeris calculations based on the sundial at 11:49 am March 5th would be the same if I punched the "clock time" of 12 noon March 5th into the chart-generating computer program (such as the one on Astrodienst.com) That would settle the nagging question I have regarding whether, using civil time conventions ("clock time") we are deviating from what "really exists" in the natural world (the Sun's time)...