[guide-user] Selective Satellites

[Rev. Pat Madden - St. Benedict Church, Grambling]

Wow!  This is amazing!  Especially, if you are correct -- and it looks like you are right on! -- it appears that Galileo actually saw Neptune, but mistook it for a "fixed" star.  Fixa is the feminine form of the Latin participial adjective, and I think it would be short for stella fixa, "a fixed star."


Pat Madden


________________________________
From: guide-user <guide-user-bounces at projectpluto.com> on behalf of Kenneth Drake <drako_kenneth at suddenlink.net>
Sent: Monday, April 27, 2020 9:47 AM
To: guide-user at projectpluto.com
Subject: Re: [guide-user] Selective Satellites

Here is what I've been able to simulate using Guide 9.1. Without knowing
the full vagaries of the time zone at Pisa in 1612, I used what I could
knowing what it is today. I had to assume that Galileo would observe
Jupiter when crossing the meridian which I find to be around 4UT and 50
degrees up. To get the simulation to approximate his notes, I had to
believe that his drawing was made in the middle of Nautical twilight -
06:50 Central European Time. Jupiter up 45 degrees. A direct link to my
image is here if it does not come up in the forum.

https://i.imgur.com/PCvFshQ.jpg

Kenneth Drake  Willis, Texas

On 4/25/2020 2:27 PM, Kenneth Drake wrote:
> Thanks. That worked great. I was simulating the configuration of the
> Jovian moons when Galileo made several observations of Jupiter in 1612
> and 1613. I found some of his notes and Guide 9.1 does a really nice
> job of displaying the positions marked by Galileo over the month long
> period. He saw Neptune also and there is a lot of controversy about
> some of his notes. Thanks for a great product.
>
> Kenneth
>
> On 4/25/2020 1:26 PM, Bill Gray wrote:
>> Hi Kenneth,
>>
>>    The setting you tried would only adjust artificial
>> earth satellites.
>>
>>    In that same Display/Data Shown dialog,  set planet
>> magnitudes to be 'fixed' (i.e.,  not varying with zoom
>> level) and set the limiting magnitude to,  say,  10.
>> After the Galileans,  the next brightest satellite of
>> Jupiter is somewhere around 16.  You'll suppress everything
>> except the Galileans.
>>
>> -- Bill
>>
>> On 4/25/20 2:16 PM, Kenneth Drake wrote:
>>> Is there a way to selectively only show the Galilean Moons and none
>>> of the other satellites of the planets? I tried Display/Data
>>> Shown/Satellites but has no effect.
>>>
>>> Kenneth Drake  Willis, Texas
>>>
>>>
>>
>

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