Where is VY Canis Majoris?

General discussion about Celestia that doesn't fit into other forums.
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Danny Lorraine II
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Post #61by Danny Lorraine II » 24.05.2018, 20:57

stars can have diameters calculated from luminosity and temperature:
\sqrt{(5772/temperature)^4 * luminosity} = radius


that's also how 1.900 solar radii for vv cephei a was calculated but celestia got it wrong
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Gurren Lagann
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Post #62by Gurren Lagann » 24.05.2018, 23:14

You still trust 2008 sources, huh? So your mind is corrupted and you are 100% dumb. UY Scuti does exist at and VY CMa is only ~1400 solar radii. The problem with this formula is that this formula cant 100% correctly the radius, and red super/hypergiants pulse a lot.

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Danny Lorraine II
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Post #63by Danny Lorraine II » 25.05.2018, 00:13

@Gurren Lagann no you are dumb. the formula is accurate and VY Canis Majoris ' s min size is 1800 solar radii . now shut up !
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Gurren Lagann
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Post #64by Gurren Lagann » 25.05.2018, 22:53

You shut up, corruption!

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Danny Lorraine II
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Post #65by Danny Lorraine II » 26.05.2018, 06:03

@Gurren Lagann i can run u over with my bus if you don't be quiet.
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Goofy
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Post #66by Goofy » 26.05.2018, 10:40

Hi Gurren Lagann and Danny Lorraine II.
Just an opinion.
I'm sincerely tired to read on many threads (why not only one?) questions regarding what is the bigger star and so on, or why xxx isn't in Celestia data.
Well all the questions have been replied many times (with even too much patience, IMHO), so why are you going on and on again on the same argument?
Moreover now, in two different threads you two switched from plain discussion to reciprocal offenses, and this is not the right way here in Celestia. :fie:
So I'm asking the moderator to please ban for some time both of you, hoping that some days without quarrelling can calm your astronomical impetuosity.
BTW I, and I think many other Celestia users, can sleep without problems even without having knowledge of VY CMa real diameter (as for angel's sex, BTW), so, please, stop!
Thanks a lot.
Goofy :smile:
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Danny Lorraine II
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Post #67by Danny Lorraine II » 30.05.2018, 20:45

en.wikipedia.org/wiki/List of largest stars

Added after 37 seconds:
edit: oh wait, they added uy scuti to the top . anyway don't trust that link
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Danny Lorraine II
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Post #68by Danny Lorraine II » 31.05.2018, 20:23

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Gurren Lagann
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Post #69by Gurren Lagann » 01.06.2018, 19:07

6 January 2012 Are you sure?

https://arxiv.org/abs/1203.5194

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Danny Lorraine II
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Post #70by Danny Lorraine II » 11.06.2018, 22:15

@Gurren Lagann
that is not true. simple

Added after 2 days 6 hours:
to add the largest stars just make an .stc file with the following code:

Code: Select all

Modify 54463 { Texture "v382.jpg" }
Modify 54463 { Radius 520000000 }

"V838 Mon"
{
   RA 4.85000
   Dec -03.50501
   Distance 20000
   AppMag 10.05
   SpectralType "M"
        Luminosity 340000
   Radius 557000000
        Texture "v838.jpg"
        Visible true
        Clickable true
}

Modify 80763 { Radius 557000000 }
Modify 27989 { Radius 661000000 }
Modify 113561 { Radius 626500000 }

35793 "VY CMa"
{
   RA 110.7430367
   Dec -25.7675654
   Distance 3840
   AppMag 7.9607
        Luminosity 270000
   SpectralType "M"
   Radius 1465500000
}

107259 # Mu Cep
{
   RA 325.8769212
   Dec 58.7800445
   Distance 5900
   SpectralType "M2Ia"
   AppMag 4.08
   Radius 988000000
}

1011403152 "KY Cyg"
{
   RA 306.4918875
   Dec 38.3521167
   Distance 5000
   AppMag 11.14
   SpectralType "M3.5Ia"
   Radius 988000000
}

Barycenter "VV Cep"
{
   RA 329.1630996
   Dec 63.6255604
   Distance 4900
}

108317 "VV Cep A"
{
   OrbitBarycenter "VV Cep"
   SpectralType "M2Iab"
   AppMag 4.91
        Luminosity 200000
   Radius 1322400000

        EllipticalOrbit {
      SemiMajorAxis 3.6
      Period 20.344
      Eccentricity 0.346
      Inclination 76
      AscendingNode 325 # inclination to plane of sky 84 deg
   }

   Obliquity 76 # to match orbit
   EquatorAscendingNode 325 # to match orbit
}

"VV Cep B"
{
   OrbitBarycenter "VV Cep"
   SpectralType "B2V"
   AbsMag -0.8 # guess
   Radius 6963920

   EllipticalOrbit {
      SemiMajorAxis 9.1
      Period 20.344
      Eccentricity 0.346
      Inclination 76
      AscendingNode 325 # inclination to plane of sky 84 deg
      ArgOfPericenter 180
   }

   Obliquity 76 # to match orbit
   EquatorAscendingNode 325 # to match orbit
}

1004493995 "V354 Cep"
{
   RA 338.3943458
   Dec 58.8964028
   Distance 9000
   SpectralType "M2.5Iab"
   AppMag 10.9
   Radius 1057464000 # radius (Sol): 1520
}


textures:
Attachments
v838.jpg
v382.jpg
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