Dear Anselmo:
thanks for the approximation. How close is it? And is UT the time at
Greenwich?
Regards, Brad
-Original Message-
From: Anselmo Pérez Serrada [mailto:[EMAIL PROTECTED]
Sent: Friday, January 16, 2004 5:19 PM
To: sundial@rrz.uni-koeln.de
Subject: Re: Right Ascension
Dear Brad
Somewhat off topic, but how do you translate (a) the right ascension of a
star and (b) the current date and time into (c) the apparent longitude of
the star?
-
If by longitude you mean the (western) geographical longitude of the
star, you may also use
the following approximation ( it comes
As long as we're trying to top each other in computer seniority
My first computer program, in college for an IBM 650, was written in 1955.
Later, at Univac, I too programmed several drum-based computers (for
example, the water-cooled Univac 1103, which also had a core memory) and
other c
Message text written by INTERNET:sundial@rrz.uni-koeln.de
> I have begun to program for my degree thesis, in 1965 in Bologna
University
in (Italy).Gianni Ferrari<
You really have started something here Gianni!! All off topic of course
but I started on a Ferranti Pegasus Computer (drum memory m
On Fri, 16 Jan 2004, Gianni Ferrari wrote:
> Hello boys !
> You are all too young!! :-)
>
> I have begun to program for my degree thesis, in 1965 in Bologna University
> in (Italy).
>
> At first in Assembler with a computer with a drum memory (how many
> remember their existence? ) , aft
Hello boys !
You are all too young!! :-)
I have begun to program for my degree thesis, in 1965 in Bologna University
in (Italy).
At first in Assembler with a computer with a drum memory (how many
remember their existence? ) , after in FORTRAN with an "ultramodern" IBM
1130 (with transisto
Potential EarthDialers:
In November I sent out the message below - here's an update. We plan
to offcially launch the central Website by the end of this month (I'll
send out a notice at that time). At this time it looks like we'll be
starting with EarthDials at the following locations:
On Fri, 16 Jan 2004, Mac Oglesby wrote:
> Many thanks for the URL to the S&T BASIC stuff. Chasing some of the
> links there brought back lots of memories. I began programming in
> BASIC in 1976, using a teletype connected to the Dartmouth
> Time-Sharing System, and still have several (working)
The first extraterrestrial sundial now sits on a planet about
150 million km away. When it was fabricated here at the U. of
Washington in 1999, I held it in the sunlight falling on our planet,
and now it's being bathed by light from the same Sun, but at a
distance about 50% farther, and the
Hello Roger,
Many thanks for the URL to the S&T BASIC stuff. Chasing some of the
links there brought back lots of memories. I began programming in
BASIC in 1976, using a teletype connected to the Dartmouth
Time-Sharing System, and still have several (working) Commodore PET
computers around t
I kept on digging in the books, and found in an old book of Jean Meeus (3rd
edition, Oct 80):
H=local hour angle, measured westward from the south,
S=the local sidereal time,
S0=siderial time at Greenwhich,
L=the observers longitude (+=West, -=East)
ra=right ascension.
then it is simple:
H=S-
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