REQUEST: Scholz's Star

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vpontin
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REQUEST: Scholz's Star

Post #1by vpontin » 09.10.2017, 03:22

Hi!

Can someone make an addon for this odd star system?

I tried to make myself but when i learned it's a binary system i stopped.

Data: https://en.wikipedia.org/wiki/Scholz's_star
http://simbad.u-strasbg.fr/simbad/sim-id?Ident=2MASS J07200325-0846499
http://vizier.u-strasbg.fr/viz-bin/VizieR-S?2MASS J07200325-0846499

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FarGetaNik M
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Post #2by FarGetaNik » 09.10.2017, 07:53

It is not terribly difficult to make a binary star system. For starters, take a look at the "nearstars.stc" file in the data folder. Just copy the definition for Rigil Kentaurus (alpha cen) and modify the parameters to fit Scholz's Star. Basically you need a barycenter and the 2 stars that orbit it.

If you don't know what all these parameters mean, take a look at the wikibooks: https://en.wikibooks.org/wiki/Celestia/STC_File

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LukeCEL
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Post #3by LukeCEL » 09.10.2017, 13:08

Hi everyone,

I made Scholz's star as part of an addon that I might want to release later. Here's the stc code:

Code: Select all

# source: https://arxiv.org/pdf/1508.06332.pdf
Barycenter "2MASS J07200325-0846499"
{
   RA 110.013558
   Dec -8.780528
   Distance 19.648
}

"2MASS J07200325-0846499 A"
{
   OrbitBarycenter "2MASS J07200325-0846499"
   SpectralType "M9.5"
   AppMag 18.3

   EllipticalOrbit {
      Period 10.4
      SemiMajorAxis 2.2594
      Eccentricity 0.79
      Inclination 34.1
      AscendingNode 221
      ArgOfPericenter 246.4
      MeanAnomaly 227.4
   }
}

"2MASS J07200325-0846499 B"
{
   OrbitBarycenter "2MASS J07200325-0846499"
   SpectralType "T5"
   AppMag 18.3 # guess, used V-mag of entire system
   Radius 70000 # brown dwarf

   EllipticalOrbit {
      Period 10.4
      SemiMajorAxis 6.3264
      Eccentricity 0.79
      Inclination 34.1
      AscendingNode 221
      ArgOfPericenter 666.4
      MeanAnomaly 227.4
   }
}


Luke

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Post #4by vpontin » 09.10.2017, 20:16

Thanks a lot Luke!


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