Comment 35 for bug 575621

Hello Robin,

Your data can also be used indeed (it lays further in the distance so that
is better):
http://eclipse.gsfc.nasa.gov/SEsearch/SEsearchmap.php?Ecl=-01350415

I used this historic event: http://www.iol.ie/~geniet/eng/skyprog.htm#484
for many software programs, but perhaps I should change to this 136 BCE
date.

I am using the latest Stepheson and Morrison [2004] DeltaT formula:
http://www.iol.ie/~geniet/eng/skyprog.htm#dT

All the best,

Victor

On 9 January 2013 09:47, R catchpole <email address hidden> wrote:

> The attached slide may help to check that what you do is correct. I
> made the slide, but the important diagram lower right, is from an
> article in Astronomy and Geophysics, some years ago (like10) written by
> Stephenson Morrsion, who's work is probably what you are using
> Best wishes
> Robin Catchpole
>
> On Tue, 08 Jan 2013 12:17:16 -0000, Alexander Wolf wrote:
> > ** Changed in: stellarium
> > Status: Triaged => In Progress
> >
> > --
> > You received this bug notification because you are subscribed to the
> > bug
> > report.
> > https://bugs.launchpad.net/bugs/575621
> >
> > Title:
> > Delta T and lunar acceleration
> >
> > Status in Stellarium:
> > In Progress
> >
> > Bug description:
> > Hello all of you,
> >
> > For some reason a full solar eclipse in Athens Greece (Jan 14th,
> > 484 CE around 5:48 UTC while they rise) is not calculated in the same
> > way as several other planetary programs (also using VSOP87/ELP2000:
> > http://www.iol.ie/~geniet/eng/skyprog.htm#Software )
> > So I am trying to find out a few things; do people know what Delta
> > T formula (like the newest one of Stephenson, Morrison 2004?) is
> > being
> > used and what lunar acceleration (-25.7 +/- 0.2 "/year^2) has been
> > used?
> >
> > I get with Stellarium (0.10.4) the max. eclipse around 7:40 UTC (so
> > it
> > is well after rising (2 hours)).
> >
> > Thanks for the feedback. I am new to Stellarium and can't really
> > yet
> > find my way around the vast amount of info, that is why I ask it in
> > this forum.
> >
> > All the best,
> >
> > Victor
> >
> > To manage notifications about this bug go to:
> > https://bugs.launchpad.net/stellarium/+bug/575621/+subscriptions
>
>
> ** Attachment added: "Solareclipse.png"
>
> https://bugs.launchpad.net/bugs/575621/+attachment/3477803/+files/Solareclipse.png
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/575621
>
> Title:
> Delta T and lunar acceleration
>
> Status in Stellarium:
> In Progress
>
> Bug description:
> Hello all of you,
>
> For some reason a full solar eclipse in Athens Greece (Jan 14th, 484 CE
> around 5:48 UTC while they rise) is not calculated in the same way as
> several other planetary programs (also using VSOP87/ELP2000:
> http://www.iol.ie/~geniet/eng/skyprog.htm#Software )
> So I am trying to find out a few things; do people know what Delta T
> formula (like the newest one of Stephenson, Morrison 2004?) is being used
> and what lunar acceleration (-25.7 +/- 0.2 "/year^2) has been used?
>
> I get with Stellarium (0.10.4) the max. eclipse around 7:40 UTC (so it
> is well after rising (2 hours)).
>
> Thanks for the feedback. I am new to Stellarium and can't really yet
> find my way around the vast amount of info, that is why I ask it in
> this forum.
>
> All the best,
>
> Victor
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/stellarium/+bug/575621/+subscriptions
>