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MOD - Creating a planet 0.980
steeljaw354Date: Wednesday, 14.09.2016, 22:13 | Message # 196
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Is a 17 hour orbital period realistic? Because when I read the book it had something like a 4-5 day orbital period. At a distance of about 180,000 miles.
 
OstariskDate: Wednesday, 14.09.2016, 23:09 | Message # 197
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Quote steeljaw354 ()
Is a 17 hour orbital period realistic? Because when I read the book it had something like a 4-5 day orbital period. At a distance of about 180,000 miles.


In a binary system, the periods should be same for both. Also, orbital period also depends on mass.

I used this algortihm to calculate the period.
Quote

https://upload.wikimedia.org/math....dc7.png
Or, in more useful units (mass - in solar masses, a - in AU, P - in years),
P = sqrt(a3/(M1 + M2))
here a is a mutual semi-major axis (ie a1 + a2)






My mods


Edited by Ostarisk - Wednesday, 14.09.2016, 23:10
 
steeljaw354Date: Wednesday, 14.09.2016, 23:26 | Message # 198
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I reverted the Orbital Period, it is fixed now. I tried to make it like it was in the book, but I guess the book had a few things wrong.
 
JackDoleDate: Thursday, 15.09.2016, 10:36 | Message # 199
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I think the book is right:

I have as a result of the orbital period 0.01476623608138427346 years, or 5.39325240220687485753 days.

I use the same formula as Ostarisk:
Code
OrbitalPeriod = sqrt (DistAU ^ 3 / (MassSolA + MassSolB))





Don't forget to look here.

 
steeljaw354Date: Thursday, 15.09.2016, 10:42 | Message # 200
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I guess I was right on the 17 hours was wrong, I'll update it, would it be stable in the place of the Earth and moon?

Edited by steeljaw354 - Thursday, 15.09.2016, 10:51
 
SpaceEngineerDate: Thursday, 15.09.2016, 13:39 | Message # 201
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Quote quarior14 ()
And precise the luminosity it is in Sun's luminosity in the spoiler of the first post.

What do you mean?





 
quarior14Date: Thursday, 15.09.2016, 14:21 | Message # 202
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SpaceEngineer, I spoke of this section but it seems to me that you edited, unless I had frowned :
Quote SpaceEngineer ()
Lum or Luminosity - luminosity of a star in solar units.





Quarior
 
steeljaw354Date: Thursday, 15.09.2016, 19:29 | Message # 203
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Next up: I'm going to make Anillo and Noom.
 
PlutonianEmpireDate: Sunday, 18.09.2016, 23:23 | Message # 204
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I was reading up on the moment of inertia on Wikipedia, and I realized that for my custom planet Belle Hades, I did define a specific characteristic of her molten guts, describing the core as having a relative core radius to planet ratio of being 10% larger than the Earth's core radius relative to Earth's radius. However Belle Hades is smaller with a smaller mass. Do I need to input a different InertiaMoment for Belle Hades than what SpaceEngine generates?

The values I use are:

Radius: 5469.6462
Mass: 0.605434

The InertiaMoment SE generates upon export is 0.331279.





Specs: Dell Inspiron 5547 (Laptop); 8 gigabytes of RAM; Processor: Intel® Core™ i5-4210U CPU @ 1.70GHz (4 CPUs), ~2.4GHz; Operating System: Windows 7 Home Premium 64-bit; Graphics: Intel® HD Graphics 4400 (That's all there is :( )

Edited by PlutonianEmpire - Sunday, 18.09.2016, 23:28
 
SpaceEngineerDate: Monday, 19.09.2016, 17:59 | Message # 205
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PlutonianEmpire, you don't need to input ALL parameters to the script. The InertiaMoment is used to compute the initial rotation period of the planet and it's increase caused by tidal interactions with other bodies. You don't need it if you specified the rotation period in your script.




 
PlutonianEmpireDate: Monday, 19.09.2016, 18:02 | Message # 206
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Nice, good to know. Thank you, SpaceEngineer! smile




Specs: Dell Inspiron 5547 (Laptop); 8 gigabytes of RAM; Processor: Intel® Core™ i5-4210U CPU @ 1.70GHz (4 CPUs), ~2.4GHz; Operating System: Windows 7 Home Premium 64-bit; Graphics: Intel® HD Graphics 4400 (That's all there is :( )
 
steeljaw354Date: Sunday, 09.10.2016, 15:55 | Message # 207
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I am having Issues with creating a Barycenter here. I am making Theia as a moon of the Earth is this mod. The Barycenter, orbital periods is flat out wrong, and I need help. The rotation periods is probably wrong also, maybe the masses are wrong also.


Attachments: 3887826.jpg (362.9 Kb) · 7620890.jpg (253.2 Kb) · Star.sc (2.0 Kb) · Theia.sc (1.7 Kb)


Edited by steeljaw354 - Sunday, 09.10.2016, 15:56
 
quarior14Date: Sunday, 16.10.2016, 10:25 | Message # 208
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He has not changed a setting to RotationPeriod for Aurora, because Space Engine make a Brown Dwarf in a custom system with a quick rotation period but when I export the script, I don't see the parameters. Also, this aurora is beautiful :

The script when I export Starya B.sc :
Code
Star    "Starya B"
{
    ParentBody     "Starya system"
    Class        "T8 V"
    Luminosity      2.14783e-008
    MassSol         0.0209336
    RadSol          0.0658201
    Teff            800

    Age             0.672148

    InertiaMoment   0.254051

    Oblateness      0.00323101

    RotationPeriod  4.89077
    Obliquity       -0.232737
    EqAscendNode    183.828

    AlbedoBond      0.3
    AlbedoGeom      0.36
    Brightness      2
    Color          (1.000 0.000 0.000)

    Surface
    {
  SurfStyle       0.414556
  Randomize      (-0.836, 0.553, -0.524)
  colorDistMagn   0.607288
  colorDistFreq   7.06308
  detailScale     117828
  colorConversion true
  tropicLatitude  0.8
  icecapLatitude  1.2
  mareFreq        0
  mareDensity     0
  erosion         0
  montesFreq      0
  dunesMagn       5
  hillsMagn       0.03
  hillsFreq       0
  craterOctaves   0
  stripeZones     4.93736
  stripeFluct     0.234792
  stripeTwist     12.0675
  cycloneMagn     10.4314
  cycloneFreq     0.760249
  cycloneDensity  0.401763
  cycloneOctaves  1
  colorLayer0    (0.240, 0.220, 0.240, 0.400)
  colorLayer1    (0.220, 0.200, 0.220, 0.200)
  colorLayer2    (0.180, 0.160, 0.180, 0.000)
  colorLayer3    (0.040, 0.040, 0.080, 0.000)
  colorLayer4    (0.020, 0.020, 0.040, 1.100)
  colorLayer5    (0.040, 0.040, 0.080, 0.000)
  colorLayer6    (0.140, 0.140, 0.160, 0.200)
  colorLayer7    (0.190, 0.190, 0.220, 1.000)
  colorLowPlants (0.020, 0.020, 0.040, 1.100)
  colorUpPlants  (0.040, 0.040, 0.080, 0.000)
  BumpHeight      45.8108
  BumpOffset      45.8108
  SpecBrightWater 0
  SpecBrightIce   0
  SpecularPower   55
  Hapke           0
  SpotBright      4
  SpotWidth       0.05
  DayAmbient      1
  ModulateColor  (0.000 0.000 0.000 0.000)
    }

    Clouds
    {
  Height          27.4883
  Velocity        895.494
  Hapke           0
  SpotBright      2
  SpotWidth       0.15
  DayAmbient      1
  mainFreq        0.500901
  mainOctaves     12
  Coverage        1
  stripeZones     4.93736
  stripeFluct     0.234792
  stripeTwist     12.0675
    }

    Clouds
    {
  Height          54.9727
  Velocity        -75.9554
  Hapke           0
  SpotBright      2
  SpotWidth       0.15
  DayAmbient      1
  mainFreq        0.500901
  mainOctaves     12
  Coverage        1
  stripeZones     4.93736
  stripeFluct     0.234792
  stripeTwist     12.0675
    }

    Clouds
    {
  Height          82.4609
  Velocity        24.6909
  Hapke           0
  SpotBright      2
  SpotWidth       0.15
  DayAmbient      1
  mainFreq        0.500901
  mainOctaves     12
  Coverage        1
  stripeZones     4.93736
  stripeFluct     0.234792
  stripeTwist     12.0675
    }

    NoOcean         true

    NoLava          true

    Atmosphere
    {
  Model          "Thick"
  Height          458.108
  Density         0
  Pressure        1
  Bright          10
  Opacity         0.7
  SkyLight        0
  Hue             0.084
  Saturation      1
    }

    Aurora
    {
  Height      1686.88
  NorthLat    85.8966
  NorthLon    -3.98047
  NorthRadius 22500
  NorthWidth  2546.3
  NorthRings  4
  NorthBright 10
  NorthParticles 5000
  SouthLat    -86.6783
  SouthLon    172.617
  SouthRadius 27652.7
  SouthWidth  2937.28
  SouthRings  3
  SouthBright 10
  SouthParticles 5000
  TopColor    (1.000 0.000 0.000)
  BottomColor (1.000 0.000 0.500)
    }

    NoRings         true

    NoAccretionDisk true

    Corona
    {
  Radius      259956
  Period      0.0036601
  Brightness  0.25
  RayDensity  1.4603
  RayCurv     7.80386
    }

    NoCometTail     true

    Orbit
    {
  RefPlane        "Equator"
  SemiMajorAxis   274.32
  Period          31402.5
  Eccentricity    0.041
  Inclination     0
  AscendingNode   180
  ArgOfPericenter -180
  MeanAnomaly     180
    }
}

Attachments: 0027818.jpg (80.3 Kb) · Starya_B.sc (3.6 Kb)





Quarior

Edited by quarior14 - Sunday, 16.10.2016, 10:28
 
MatsoftwareDate: Sunday, 16.10.2016, 11:49 | Message # 209
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Quote quarior14 ()
He has not changed a setting to RotationPeriod for Aurora, because Space Engine make a Brown Dwarf in a custom system with a quick rotation period but when I export the script, I don't see the parameters. Also, this aurora is beautiful

You was wrote to me?





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If I'm not replying to a PM, my account is hacked!
 
quarior14Date: Sunday, 16.10.2016, 12:00 | Message # 210
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Quote Matsoftware ()
You was wrote to me?

This message has no specific addressee, unless you know smile ?





Quarior
 
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