POV-Ray : Newsgroups : povray.object-collection : SolarSystemOrrery Server Time: 9 Dec 2018 22:06:33 GMT
  SolarSystemOrrery (Message 1 to 10 of 10)  
From: Mike Horvath
Subject: SolarSystemOrrery
Date: 15 Sep 2018 09:23:25
Message: <5b9ccf8d$1@news.povray.org>
I added a new item to the Object Collection.

http://lib.povray.org/searchcollection/index2.php?objectName=SolarSystemOrrery&version=1.0&contributorTag=SharkD

A model of the solar system. Includes all eight planets. Can be animated 
by setting the Orrery_StopDate parameter to the clock. I would like to 
add Pluto and Ceres as well, but I could not find all the necessary data 
for them.


Mike


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From: Cousin Ricky
Subject: Re: SolarSystemOrrery
Date: 16 Sep 2018 01:35:53
Message: <5b9db379$1@news.povray.org>
On 2018-09-15 05:23 AM (-4), Mike Horvath wrote:
> I added a new item to the Object Collection.
>
>
http://lib.povray.org/searchcollection/index2.php?objectName=SolarSystemOrrery&version=1.0&contributorTag=SharkD
>
>
> A model of the solar system. Includes all eight planets. Can be animated
> by setting the Orrery_StopDate parameter to the clock.

Neat!

 > I would like to
> add Pluto and Ceres as well, but I could not find all the necessary data
> for them.

What?  This is size-ism!


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From: Bald Eagle
Subject: Re: SolarSystemOrrery
Date: 16 Sep 2018 03:20:00
Message: <web.5b9dcab7a37e2080458c7afe0@news.povray.org>
Cousin Ricky <ric### [at] yahoocom> wrote:

>  > I would like to
> > add Pluto and Ceres as well, but I could not find all the necessary data
> > for them.
>
> What?  This is size-ism!

Size matters.




The data I have for Pluto is

// Pluto discovered by Clyde Tombaugh February 18, 1930
#declare PlutoRad = 1189.9*KM*I;    // (ER*0.18)*Miles*I; // Pluto Radius [1150
KM]
#declare PlutoRot = -360*(OC/6.387230);   // Pluto Rotation: -360 deg every 6.38
days [retrograde rotation] [-6.39]
#declare PlutoTilt = 122.53;     // Pluto tilt to orbital plane
#declare PlutoDist = SunRad+(5913520000*KM)*Scale; //SunRad+(EarthDist*39.44);
// Pluto distance from Sun
#declare PlutoSemiMaj = 5906.38*GM*Scale;  // [1] Pluto semimajor Axis
#declare PlutoEpoch = J2000;     // [2] Pluto Epoch
#declare PlutoRev = 360*(Clock/248.00);   // Pluto Revolution: 360 deg every
248.00 years (90560 days)(orbital period)
#declare PlutoIncl = 17.16;     // [4] Pluto orbital inclination to Earth
orbital plane
#declare PlutoEccen = 0.2488;     // [3] Pluto orbital Eccentricity
#declare PlutoArgPeri = 113.834;    // [5] Pluto Argument of Perihelion
#declare PlutoLongAsc = 110.299;    // [6] Pluto Longitude of Ascending Node
#declare PlutoPrecA = 0;      // Pluto Axial precession ?
#declare PlutoPrecO = 0;      // Pluto Orbital precession ?
#declare PlutoMat = material {texture {pigment {Gray90} normal {bumps scale
0.00001} finish {diffuse  0.55}}}
// 5 satellites


I have nothing (yet) for Ceres.
(But I'm only 1300 lines of code into it...)


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From: Bald Eagle
Subject: Re: SolarSystemOrrery
Date: 16 Sep 2018 03:25:00
Message: <web.5b9dcbf9a37e2080458c7afe0@news.povray.org>
Mike Horvath <mik### [at] gmailcom> wrote:
> I would like to
> add Pluto and Ceres as well, but I could not find all the necessary data
> for them.
>
>
> Mike

https://lite.qwant.com/?q=ceres+orbital+data

https://www.windows2universe.org/our_solar_system/planets_orbits_table.html


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From: Mike Horvath
Subject: Re: SolarSystemOrrery
Date: 16 Sep 2018 19:52:45
Message: <5b9eb48d$1@news.povray.org>
On 9/15/2018 11:20 PM, Bald Eagle wrote:
> Mike Horvath <mik### [at] gmailcom> wrote:
>> I would like to
>> add Pluto and Ceres as well, but I could not find all the necessary data
>> for them.
>>
>>
>> Mike
> 
> https://lite.qwant.com/?q=ceres+orbital+data
> 
> https://www.windows2universe.org/our_solar_system/planets_orbits_table.html
> 
> 


I will take a look at those, thanks. As soon as I can find the bugs in 
my code that is. :(

Mike


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From: Kenneth
Subject: Re: SolarSystemOrrery
Date: 16 Sep 2018 23:40:01
Message: <web.5b9ee985a37e2080a47873e10@news.povray.org>
"Bald Eagle" <cre### [at] netscapenet> wrote:
> Mike Horvath <mik### [at] gmailcom> wrote:
>
> https://www.windows2universe.org/our_solar_system/planets_orbits_table.html

What I find strange about Ceres is its orbital period around the Sun-- 4,999
years. The table of orbital periods given there shows that all the planets (and
Pluto) naturally orbit slower the farther away they are from the Sun-- with
Ceres being *by far* the slowest; but it's Sun-distance is *closer* than either
Pluto or Jupiter. It should be rotating faster than Jupiter, but isn't. Maybe
it's caught in some kind of gravitational tug-of-war with Jupiter and the Sun?
Interesting!


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From: Kenneth
Subject: Re: SolarSystemOrrery
Date: 16 Sep 2018 23:50:00
Message: <web.5b9eeb44a37e2080a47873e10@news.povray.org>
"Kenneth" <kdw### [at] gmailcom> wrote:
> >
> > https://www.windows2universe.org/our_solar_system/planets_orbits_table.html
>
> What I find strange about Ceres is its orbital period around the Sun-- 4,999
> years.

Oops-- that's 4.99 years (off by only 10 to the third power!!) My eyes played
tricks on me.

But's that's still quite strange, given its relative distance from the sun.


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From: Kenneth
Subject: Re: SolarSystemOrrery
Date: 17 Sep 2018 00:00:00
Message: <web.5b9eed91a37e2080a47873e10@news.povray.org>
"Kenneth" <kdw### [at] gmailcom> wrote:

>
> Oops-- that's 4.99 years (off by only 10 to the third power!!) My eyes played
> tricks on me.
>
> But's that's still quite strange, given its relative distance from the sun.

Hmm, not so strange after all. It's faster than Jupiter, which makes sense.

Never mind.  ;-)


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From: clipka
Subject: Re: SolarSystemOrrery
Date: 17 Sep 2018 00:29:23
Message: <5b9ef563$1@news.povray.org>
Am 17.09.2018 um 01:38 schrieb Kenneth:

> What I find strange about Ceres is its orbital period around the Sun-- 4,999
> years. The table of orbital periods given there shows that all the planets (and
> Pluto) naturally orbit slower the farther away they are from the Sun--

Yes, of course; that's inevitable.

> with
> Ceres being *by far* the slowest; but it's Sun-distance is *closer* than either
> Pluto or Jupiter. It should be rotating faster than Jupiter, but isn't.

Is it not?

The table linked to specifies 11.8 yrs for Jupiter, as compared to 4.599
for Ceres. That makes it faster (in terms of angular speed) than Jupiter.


(It's also faster in terms of km/s; again, inevitable.)


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From: Mike Horvath
Subject: Re: SolarSystemOrrery
Date: 18 Sep 2018 02:08:06
Message: <5ba05e06$1@news.povray.org>
I just realized I have a copy of "fbruder_kepler.inc" which does all I 
wanted, plus more. Sigh.

:|


Mike


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