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AlexanderVB
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COMMUNITY ADDON - Catalog Fixes for SE

26 Dec 2017 19:22

FW Tau is a binary star system with a gas giant orbiting both of them. The gas giant takes 11421.023 years in Space Engine.
The problem is that both stars orbit each other at wildly different orbital periods. One of them has a orbital period of 24.376 years, while the other is 11421.023 years, exactly the same as the gas giant.
Based on the mass of each star (in which both of them have the exact same mass of 0.28 solar masses, which means the total mass of both stars is 0.56 solar masses) and their distance from each other (which is 11 AU), and based on the link below...

http://hyperphysics.phy-astr.gsu.edu/hb ... istar.html

... I predict that the true value for the orbital period is 48.75228932353551 years. Please note that this is entirely based on the mass, so if the mass turned out to be wrong as well, so is my prediction.
 
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SpaceEngineer
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COMMUNITY ADDON - Catalog Fixes for SE

27 Dec 2017 00:20

Julian wrote:
Source of the post According to Wikipedia, WR 124 is another name for HIP 94289, and it's the Wolf-Rayet star at the center of the M1-67 planetary nebula. However, in SE's default catalog, HIP 94289 is 7631.78 ly closer to Earth than the nebula is. This fix gives the star the same coordinates and distance as the nebula:

You do not need to use RemoveStar, as long as the name of star does not changed. SE merges all object with the same names.

AlexanderVB wrote:
Source of the post FW Tau is a binary star system with a gas giant orbiting both of them.

Ouch, you have discovered a bug! SE computes orbital period itself, if it is not specified in the catalog. But this time it takes the planet b as secondary companion of the star B, thus computes wrong period. The bus is fixed now.

Thanks for fixes!
 
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JackDole
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COMMUNITY ADDON - Catalog Fixes for SE

28 Jan 2018 08:51

KIC 10001893

The star KIC 10001893 is shown as a giant star, rather than as a sub-dwarf. That's why his planets are inside the star !

Here is a slightly different script. Put it in 'addons\catalogs\stars'.
// Filename: KIC10001893.sc
// JackDole 2018.01.28 17:11:09

//------------------------------------------------------------------------------

Star "KIC 10001893"
{
    RA      19 09 33.405
    Dec     46 59 04.16
    
    Class   "sdb"
    
    AppMagn 16
    MassSol 0.47
    RadSol  0.24
    
    Teff    26700
}

//------------------------------------------------------------------------------

KIC10001893.sc
(418 Bytes) Downloaded 204 times


(Found by Notumengi at https://www.reddit.com/r/spaceengine/co ... e_planets/)
JackDole's Universe: http://forum.spaceengine.org/viewtopic.php?f=3&t=71
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JackDole: Mega structures ... http://old.spaceengine.org/forum/17-3252-1 (Old forum)
 
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Ross 128b
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COMMUNITY ADDON - Catalog Fixes for SE

07 Jun 2018 12:59

Teegarden's Star is too massive, too small, and doesn't have the right spectral type in the game. It should also probably be renamed, since I think it's referred to as 'Teegarden's Star' [i]way [/i]more often than '2MASS J02530084+1652532'.

Also, Barnard's Star is an M4VI in SE, when it should be an M4V.
I heard that humans discovered me back in 2017. Very worrying!
 
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AlexanderVB
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COMMUNITY ADDON - Catalog Fixes for SE

08 Jun 2018 04:34

In SpaceEngine, the star CHI Aqr is also called Situla. However, the name actually belongs to KAP Aqr.
 
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COMMUNITY ADDON - Catalog Fixes for SE

08 Jun 2018 14:06

Thanks, fixed!
 
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Cantra
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COMMUNITY ADDON - Catalog Fixes for SE

11 Jun 2018 15:19

The object of 2007OR10 should have it's moon and have a reddish color to it. In space engine it appears to be only 660 miles in diameter while it's actual size is closer to 950ish.

2002 MS4 should be around 730 kilometers while in SE it's only around 600ish? 
 
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COMMUNITY ADDON - Catalog Fixes for SE

12 Jun 2018 11:32

Thanks, 2007 OR10 with its satellite is already added to SE 0.990.
 
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JackDole
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COMMUNITY ADDON - Catalog Fixes for SE

17 Jul 2018 12:03

Some new Jupiter moons.
Astronomers discover 12 new moons orbiting Jupiter - one on collision course with the others

Here's a script with the 10 new Jupiter moons. (Two are a slightly older and already in the SpaceEngine catalog.)
NewJupiterMoons.sc
(14.71 KiB) Downloaded 168 times

I left the data I made the script with as comments in the script.
(The 11th is apparently an update for an older moon.)
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Mosfet
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COMMUNITY ADDON - Catalog Fixes for SE

11 Dec 2018 15:13

According recent shape model data sources (https://space.frieger.com/asteroids/moons/S18-Pan), the Saturn moon Pan could be slightly elliptical in two axes. By retouching the Z Oblateness value and thanks to the recent introduction of ridges, the procedural shape is even more similar to the calculated shape.
DwarfMoon    "Pan/Saturn XVIII/S|1981 S13"
{
    ParentBody     "Saturn"
    Albedo          0.5
    Radius          12.8
    Oblateness     (0.000, 0.400, 0.220)
    Mass            8.2E-10

    RotationModel "IAU"
    {
        Epoch            2451545        // J2000
        PoleRA          40.6        // degrees
        PoleRARate      -0.036        // degrees/century
        PoleDec         83.5        // degrees
        PoleDecRate     -0.004        // degrees/century
        PrimeMeridian    48.8        // degrees
        RotationRate    626.044        // degrees/day
    }
    
    Surface
    {
        venusFreq       0.66
        venusMagn       0.0
        eqridgeMagn     0.5
        eqridgeWidth    0.11827
        eqridgeModMagn  0.5916
        eqridgeModFreq  0.30534
    }

    Orbit
    {
        Epoch          2453177.5
        Period         0.001574434718
        SemiMajorAxis  0.0008929411764
        Eccentricity   0.00021
        Inclination    0.007
        AscendingNode  263
        LongOfPericen  209
        MeanLongitude  106.645
    }
}
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SpaceEngineer
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COMMUNITY ADDON - Catalog Fixes for SE

11 Dec 2018 17:18

JackDole:

I assume that the letter 'H' stands for the 'RotationPeriod' and the letter 'P' for the diameter or the radius. (I took it as radius.)

You are wrong, H is the absolute magnitude (AbsMagn in SE). I don't know what is P/d, but certainly not a size. Size can be estimated from absolute magnitude and assumed albedo.
Notice what you can use PeriodDays and SemiMajorAxisKm, to avoid manual conversion.
 
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JackDole
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COMMUNITY ADDON - Catalog Fixes for SE

12 Dec 2018 01:27

SpaceEngineer wrote:
Source of the post I don't know what is P/d, but certainly not a size

I have kept 'P' for the diameter or radius. 'P/d' I think is 'Period/day'

Here is a corrected version. With 'H' for 'AbsMagn'. I disabled 'Radius'. (But I still consider 'P' to be the diameter or radius (in Km) as it seems to fit very well. These new Jupiter moons are obviously very small.)
NewJupiterMoons.sc
(14.18 KiB) Downloaded 51 times
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COMMUNITY ADDON - Catalog Fixes for SE

12 Dec 2018 03:21

Thank you, added to steam update.
 
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soldies502
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COMMUNITY ADDON - Catalog Fixes for SE

18 Dec 2018 15:07

2018 VG18: A possible new dwarf planet, 120 AU away from sun. Is pinkish.

https://en.wikipedia.org/wiki/2018_VG18
 
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N3cronium
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COMMUNITY ADDON - Catalog Fixes for SE

21 Dec 2018 20:24

I've created an addon for 2018 VG18:
[code]// https://en.wikipedia.org/wiki/2018_VG18

Asteroid "2018 VG18" // "Farout"
{
    ParentBody  "Sol"
    Class       "Asteroid"
    AsterType   "TNO"
    
    Radius      250
    Color ( 1 0.57 0.78 )
    
    DiscDate    "2018.11.10"
    
    AbsMagn     3.2498
    
    Orbit
    {
        Eccentricity    0.7717437510349855
        SemiMajorAxis   95.23712927242569
        PericenterDist  21.73846988992007
        Inclination     31.71377520866712
        AscendingNode   247.4427078740553
        ArgOfPericen    32.88824233518356
        MeanAnomaly     73.76581889010136
        Period          929.43
        MeanMotion      0.001060460825511582
        Epoch           2458447.5
    }
}

[/code]
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