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Forum » SpaceEngine » Feedback and Suggestions » New giant stars list suggestions
New giant stars list suggestions
EmmaDate: Sunday, 12.10.2014, 13:15 | Message # 1
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giant stars All stars are on Milky Way

UY Scuti (Red Hypergiant) http://en.wikipedia.org/wiki/UY_Scuti

NML Cygni (Red Hypergiant) http://en.wikipedia.org/wiki/NML_Cygni

VX Sagittarii (Red Hypergiant) http://en.wikipedia.org/wiki/VX_Sagittarii

PZ Cassiopeiae (Red Supergiant) http://en.wikipedia.org/wiki/PZ_Cassiopeiae

----

VY Canis majoris are already added in SE
UY Scuti are largest star 1st!
 
SalvoDate: Sunday, 12.10.2014, 13:43 | Message # 2
Star Engineer
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I thought those stars was already on SE, and I also thought VY Canis Majoris was the biggest one... (feel kinda old wacko )
Are those stars recently discovered/studied?

Also, welcome to the forum!





The universe is not required to be in perfect harmony with human ambition.

CPU: Intel Core i7 4770 GPU: ASUS Radeon R9 270 RAM: 8 GBs

(still don't know why everyone is doing this...)
 
MosfetDate: Sunday, 12.10.2014, 16:03 | Message # 3
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I cannot check right now, but is it possible that those stars are on SE with their Hipparcos number?
for example PZ Cassiopeae has designation HIP 117078 on that catalogue.





"Time is illusion. Lunchtime doubly so."
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RockoRocksDate: Sunday, 12.10.2014, 20:54 | Message # 4
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Last year I have added all of these stars to SE, but never took the time to publish them. Here they are then. It also includes a couple of other supergiant stars.

Code

///////////////////////////////////////////////////////////
//     Supergiant star expansion pack by RockoRocks      //
//     Updated 18.10.2013    //
///////////////////////////////////////////////////////////

StarBarycenter "NML Cyg/V1489 Cyg"
{
  RA       20 46 25.6
  Dec     -40 06 59.4
  Dist     1610
  Class   "M6 Ia"
  AppMagn  16.6
}

StarBarycenter "UY Sct"
{
  RA       18 27 36.5
  Dec     -12 27 58.8
  Class   "M4 Ia"
  AppMagn  9.0
}

StarBarycenter "W1-26/W26/Wd 1-26"
{
  RA       16 47 03.99
  Dec     -45 50 36.00
  Dist     5500
  Class   "M4 Ia" // median spectral type estimate
  AppMagn  16.79
}

StarBarycenter "VX Sgr/HIP 88838/HD 165674"
{
  RA       18 08 04.0485
  Dec     -22 13 26.614
  Dist     1570
  Class   "M5 III"
  AppMagn  10.35 // actually a semiregular variable star, this is the average appmagn.
}

StarBarycenter "AH Sco/HIP 84071/HD 155161"
{
  RA       17 11 17.02114
  Dec     -32 19 30.7132
  Dist     3679.138
  Class   "M5 Ia"
  AppMagn  12.5
}

StarBarycenter "PZ Cas/HIP 117078"
{
  RA       23 44 03.28104
  Dec     -61 47 22.1823
  Class   "M3 Ia"
  AppMagn  8.75
}

StarBarycenter "BI Cyg/IRC +40408"
{
  RA       20 21 21.8803
  Dec      36 55 55.771
  Class   "M3 Ia"
  AppMagn  9.31
}

StarBarycenter "S Per/HD 14528/HIP 11093"
{
  RA       02 22 51.709
  Dec      58 31 11.45
  Class   "M3 Ia"
  AppMagn  9.23
}

StarBarycenter "BC Cyg/HIP 100404/BD+37 3903"
{
  RA       02 01 05.98
  Dec      75 29 00.04
  Dist     3150
  Class   "M3 Ia"
  AppMagn  9.97
}

StarBarycenter "RT Car/HIP 52562/HIP 303310/SAO 238424"
{
  RA       10 44 47.14
  Dec     -59 24 48.12
  Dist     1966
  Class   "M2 Ia"
  AppMagn  8.55
}

StarBarycenter "V396 Cen/HD 115283/SAO 252241"
{
  RA       13 17 25.0446
  Dec     -61 35 02.376
  Dist     5672
  Class   "M4 Ia"
  AppMagn  7.92
}

StarBarycenter "CK Car/HD 90382/SAO 238038"
{
  RA       10 24 25.3580
  Dec     -60 11 29.039
  Dist     2176.8234
  Class   "M3 Ia"
  AppMagn  7.59
}

StarBarycenter "V1749 Cyg/IRC +40406/GSC 02680-00828"
{
  RA       20 21 14.068
  Dec      35 37 16.63
  Class   "M2 Ia"
  AppMagn  9.84
}

StarBarycenter "RS Per/HDD 14488/BD+56 583"
{
  RA       02 22 24.30
  Dec      57 06 34.4
  Class   "M4 Ia"
  AppMagn  8.73
}


To install, simply copy and paste this code at the bottom of Stars.sc in your catalogs/stars/ folder.

EDIT: Distances of some stars fixed.





I will be inactive on this forum for the time being. Might come back eventually

AMD AR-3305M APU w/ Radeon HD 1.90 GHz 6,00 GB RAM


Edited by RockoRocks - Saturday, 18.10.2014, 08:46
 
SpaceEngineerDate: Sunday, 12.10.2014, 22:50 | Message # 5
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Quote Salvo ()
Are those stars recently discovered/studied?


Their names (UY, VX etc) are from the very ancient system of naming the variable stars. This mean that they was known for decades, if not centuries.

Quote RockoRocks ()
To install, simply copy and paste this code at the bottom of Stars.sc in your catalogs/stars/ folder.


You forgot the planets catalog (for the stars bodies). This catalog is only the barycenters.





 
RockoRocksDate: Monday, 13.10.2014, 17:58 | Message # 6
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Quote SpaceEngineer ()
You forgot the planets catalog (for the stars bodies). This catalog is only the barycenters.

Oh yes, thank you for reminding me! Here is the stars bodies' catalog:

Code

///////////////////////////////////////////////////////////
//     Supergiant star catalog by RockoRocks     //
//     Updated 16.12.2013    //
///////////////////////////////////////////////////////////

Star    "NML Cygni"
{
   ParentBody "NML Cyg"
   Class      "M6 Ia"
   AppMagn     16.60
   Radius      1147575000
   Mass        33
   Orbit
   {
    Type   "Static"
   }
}

Star    "UY Scuti"
{
   ParentBody "UY Sct"
   Class      "M4 Ia"
   AppMagn     9.0
   Radius      582133500 // random median
   Mass        32
   Orbit
   {
    Type   "Static"
   }
}

Star    "Westerlund 1-26/Westerlund 1 BKS A"
{
   ParentBody "W1-26"
   Class      "M4 Ia"
   AppMagn     9.0
   Radius      708366750
   Mass        34 // fictional
   Orbit
   {
    Type   "Static"
   }
}

Star    "VX Sagittarii"
{
   ParentBody "VX Sgr"
   Class      "M5 III"
   AppMagn     10.35
   Radius      528580000 // maximum possible size, likely less
   Mass        10.5 // fictional
   Orbit
   {
    Type   "Static"
   }
}

Star    "AH Scorpii"
{
   ParentBody "AH Sco"
   Class      "M5 Ia"
   AppMagn     12.5
   Radius      490675250
   Mass        30 // fictional
   Orbit
   {
    Type   "Static"
   }
}

Star    "PZ Cassiopeiae"
{
   ParentBody "PZ Cas"
   Class      "M3 Ia"
   AppMagn     8.75
   Radius      544228750
   Mass        29 // fictional
   Orbit
   {
    Type   "Static"
   }
}

Star    "BI Cygni"
{
   ParentBody "BI Cyg"
   Class      "M3 Ia"
   AppMagn     9.31
   Radius      468919688
   Mass        31 // fictional
   Orbit
   {
    Type   "Static"
   }
}

Star    "S Persei"
{
   ParentBody "S Per"
   Class      "M3 Ia"
   AppMagn     9.23
   Radius      349488750
   Mass        28 // fictional
   Orbit
   {
    Type   "Static"
   }
}

Star    "BC Cygni"
{
   ParentBody "BC Cyg"
   Class      "M3 Ia"
   AppMagn     9.97
   Radius      443381250
   Mass        20
   Orbit
   {
    Type   "Static"
   }
}

Star    "RT Carinae"
{
   ParentBody "RT Car"
   Class      "M2 Ia"
   AppMagn     8.55
   Radius      379047500
   Mass        25 // fictional
   Orbit
   {
    Type   "Static"
   }
}

Star    "V396 Centauri"
{
   ParentBody "V396 Cen"
   Class      "M4 Ia"
   AppMagn     7.92
   Orbit
   {
    Type   "Static"
   }
}

Star    "CK Carinae"
{
   ParentBody "CK Car"
   Class      "M3 Ia"
   AppMagn     7.59
   Radius      737230000
   Orbit
   {
    Type   "Static"
   }
}

Star    "V1749 Cygni"
{
   ParentBody "V1749 Cyg"
   Class      "M2 Ia"
   AppMagn     9.84
   Orbit
   {
    Type   "Static"
   }
}

Star    "RS Persei"
{
   ParentBody "RS Per"
   Class      "M4 Ia"
   AppMagn     8.73
   Radius      695500000
   Orbit
   {
    Type   "Static"
   }
}

Copy and pase this code to Stars.sc in catalogs/planets. Make sure you copy and paste this one to the Stars.sc in the planets folder!





I will be inactive on this forum for the time being. Might come back eventually

AMD AR-3305M APU w/ Radeon HD 1.90 GHz 6,00 GB RAM


Edited by RockoRocks - Monday, 20.10.2014, 17:07
 
SpaceEngineerDate: Monday, 13.10.2014, 21:33 | Message # 7
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RockoRocks, you may calculate the distance to the stars with missing distance data using their spectral type and appmagn. Or, much more easy, let do it SE - it can calsulate the distance automatiaclly. You can control the result in the log if you set the StarSilentLoading false in the universe.cfg.




 
EmmaDate: Friday, 17.10.2014, 20:03 | Message # 8
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RockoRocks Thanks you !

Added (17.10.2014, 19:03)
---------------------------------------------
RockoRocks Found a bug: NML Cygni in universe.. not Milky Way
Please some fix this star back to milky way
And the star is invisbility

 
RockoRocksDate: Saturday, 18.10.2014, 08:49 | Message # 9
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Quote SpaceEngineer ()
Or, much more easy, let do it SE - it can calsulate the distance automatiaclly.

Oh thanks! I thought the star distance was something you had to fill in or the star won't appear or the game would crash or something.

Check my post for the updated catalog with random distance estimates removed.

Quote Emma ()
RockoRocks Found a bug: NML Cygni in universe.. not Milky Way
Please some fix this star back to milky way

This is not a bug, it is simply so that this stars' distance and RA/Declination mean the Star is actually situated somewhere there. It is technically still in the Milky Way, only somewhat high above the galactic plane.

Quote Emma ()
And the star is invisbility

This is because you have only added the Star Barycenters to your catalogs.
You must also add the code from my second post here to Stars.sc (in the planets folder). Otherwise none of the stars will be visible.





I will be inactive on this forum for the time being. Might come back eventually

AMD AR-3305M APU w/ Radeon HD 1.90 GHz 6,00 GB RAM
 
EmmaDate: Saturday, 18.10.2014, 21:29 | Message # 10
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RockoRocks all supergiant stars are lower diameter Why?

NML Cygni = 7.617 AU diameter

VY Canis Majoris = 18.132 AU diameter
 
WatsisnameDate: Sunday, 19.10.2014, 19:26 | Message # 11
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Space Engine doesn't account for interstellar reddening/extinction, so in reality those stars are much more luminous and therefore larger than SE calculates them to be.




 
RockoRocksDate: Monday, 20.10.2014, 17:05 | Message # 12
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Maybe I put in incorrect diameter value. Which unit is star size in SpaceEngine specified in?
Also it looks like the NML Cygni's diameter is the same as its radius so just doubling the value (making it 1147575000) will fix it.





I will be inactive on this forum for the time being. Might come back eventually

AMD AR-3305M APU w/ Radeon HD 1.90 GHz 6,00 GB RAM
 
apenpaapDate: Monday, 20.10.2014, 23:18 | Message # 13
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Quote Salvo ()
I thought those stars was already on SE, and I also thought VY Canis Majoris was the biggest one... (feel kinda old wacko )


Apparently VY was estimated bigger than it was until recently. I liked when WOH G64 was considered the largest star for a while. It allowed for "WOH, that's a big star!" puns.





I occasionally stream at http://www.twitch.tv/magistermystax. Sometimes SE, sometimes other games.
 
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