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Mosfet
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

21 Apr 2017 19:16

Again from the Main Belt.
3309 Brorfelde:
Asteroid "Brorfelde/(3309) Brorfelde"
{
    ParentBody        "Sol"
    AsterType        "Hungaria"
    Radius            2.44
    AbsMagn            13.6
    SlopeParam        0.15
    Albedo            0.253
    RotationPeriod    2.5041
    Orbit
    {
        Epoch            2456800.5
        SemiMajorAxis    1.817472098
        Period            2.450246799
        MeanAnomaly        313.52236
        ArgOfPericenter    218.627257
        Eccentricity    0.053273893
        Inclination        21.1338673
        AscendingNode    29.807519
        PericenterDist    1.72064828
        RefPlane        "Ecliptic"
    }
}

Asteroid "S2005 (3309) 1"
{
    ParentBody        "(3309) Brorfelde"
    Radius            0.635
    RotationPeriod    18.45
    Orbit
    {
        SemiMajorAxis    6.01612841004E-08 // 9 km
        Period            0.002108190185576 // 0.77 days
        MeanAnomaly        0
        ArgOfPericenter    0
        Eccentricity    0
        Inclination        0
        AscendingNode    0
        PericenterDist    0
        RefPlane        "Equator"
    }
}
3673 Levy:
Asteroid "Levy/(3673) Levy"
{
 ParentBody "Sol"
 Radius 3.085
 AbsMagn 12.8
 SlopeParam 0.15
 Albedo 0.247
 RotationPeriod 2.688
 Orbit
 {
 Epoch 2456800.5
 SemiMajorAxis 2.345440167
 Period 3.592069575
 MeanAnomaly 310.947541
 ArgOfPericenter 45.092121
 Eccentricity 0.184083409
 Inclination 7.0879582
 AscendingNode 13.389115
 PericenterDist 1.91368354
 RefPlane "Ecliptic"
 }
}

Asteroid "S2007 (3673) 1"
{
 ParentBody "(3673) Levy"
 Radius 0.865
 Orbit
 {
 SemiMajorAxis 8.68996325895E-08 // 13 km
 Period 0.002464118398725 // 0.9 days
 MeanAnomaly 0
 ArgOfPericenter 180
 Eccentricity 0
 Inclination 0
 AscendingNode 0
 PericenterDist 0
 RefPlane "Equator"
 }
}
"Time is illusion. Lunchtime doubly so". Douglas N. Adams
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

23 Apr 2017 11:46

Right now I'm slowly going through main belt confirmed binaries from Johnson's Archive, then there are still tons of confirmed NEOs and TNOs that will have to be added to the script. Then there are more which are probable binaries, some of them are already in the catalog. Lot of work in spare time.
Maybe it's possible do download some csv database and feed to script, which generates SE catalog files?
Space Engine seems to be fine with showing the number of moons for the largest object in the barycenter system. Take the multiple TNO Pluto for example. In this system SE shows the barycenter "Pluto-Charon" having 6 satellites and Pluto having 5. Also as another example, the binary asteroid Antiope is shown having 1 moon and barycenter "Antiope system" is shown with 2 satellites.
This is fixed for the next version. SE now "collects" satellites from the children and parent barycenters and adds them to the primary's satellites counter. Primary is the most massive object in the system.
Could I ask how the diameters of asteroids and other objects shown in the game are calculated? Is this equatorial diameter, mean diameter or what?
Equatorial. Yes I added Solar System myself manually, but processed asteroids and comets from the MPC data files (there are thousands of them).
Sorry if I ask this here, was just wondering the asteroid diameter calculation in the game engine as many asteroids are not very regular shaped.
SE does not calculates radius of asteroids - vice versa, it reads it from catalog script and generates model roughly of the same size. If there is no radius data provided, SE tries to calculate it from photometric parameters (absolute magnitude and slope factor) - this is the case of majority of asteroids. Of course if you trying to measure an average radius of a procedural model, it will not coincide with the catalog value, due to random nature of procedural terrain.
 
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Mosfet
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

23 Apr 2017 13:37

Maybe it's possible do download some csv database and feed to script, which generates SE catalog files?
Recently indeed I started considering this option :)
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

25 Apr 2017 10:23

3868 Mendoza
Asteroid "Mendoza/(3868) Mendoza"
{
 ParentBody "Sol"
 Radius 4.565
 AbsMagn 12.5
 SlopeParam 0.15
 Albedo 0.162
 RotationPeriod 2.7709
 Orbit
 {
 Epoch 2456800.5
 SemiMajorAxis 2.333797095
 Period 3.565355541
 MeanAnomaly 22.374915
 ArgOfPericenter 185.49056
 Eccentricity 0.098212416
 Inclination 8.1028
 AscendingNode 171.594754
 PericenterDist 2.10458924
 RefPlane "Ecliptic"
 }
}

Asteroid "S2009 (3868) 1"
{
 ParentBody "(3868) Mendoza"
 Radius 1.005
 Orbit
 {
 SemiMajorAxis 1.33691742445E-07 // 20 km
 Period 0.002781715881227 // 1.016 days
 MeanAnomaly 0
 ArgOfPericenter 0
 Eccentricity 0
 Inclination 0
 AscendingNode 0
 PericenterDist 0
 RefPlane "Equator"
 }
}
4029 Bridges
Asteroid "Bridges/(4029) Bridges"
{
 ParentBody "Sol"
 Radius 3.9
 AbsMagn 12.8
 SlopeParam 0.15
 Albedo 0.201
 RotationPeriod 3.5746
 Orbit
 {
 Epoch 2456800.5
 SemiMajorAxis 2.525421064
 Period 4.013367228
 MeanAnomaly 353.163485
 ArgOfPericenter 16.672823
 Eccentricity 0.130959059
 Inclination 5.4370864
 AscendingNode 214.796995
 PericenterDist 2.1946943
 RefPlane "Ecliptic"
 }
}

Asteroid "S2006 (4029) 1"
{
 ParentBody "(4029) Bridges"
 Radius 0.935
 Orbit
 {
 SemiMajorAxis 8.68996325895E-08 // 13 km
 Period 0.001860683181971 // 0.6796 days
 MeanAnomaly 0
 ArgOfPericenter 0
 Eccentricity 0
 Inclination 0
 AscendingNode 0
 PericenterDist 0
 RefPlane "Equator"
 }
}
4492 Debussy
Barycenter "Debussy system"
{
 ParentBody "Sol"
 Orbit
 {
 Epoch 2456800.5
 SemiMajorAxis 2.765983837
 Period 4.600262977
 MeanAnomaly 179.514293
 ArgOfPericenter 52.614095
 Eccentricity 0.180358464
 Inclination 8.0245664
 AscendingNode 350.064813
 PericenterDist 2.26711524
 RefPlane "Ecliptic"
 }
}

Asteroid "Debussy/(4492) Debussy"
{
 ParentBody "Debussy system"
 Radius 7.3
 AbsMagn 12.8
 SlopeParam 0.15
 Albedo 0.041
 RotationPeriod 26.606
 Orbit
 {
 SemiMajorAxis 4.35440578607245E-08 // 31 km
 Period 0.003036341449096 // 1.109 days
 MeanAnomaly 0
 ArgOfPericenter 0
 Eccentricity 0
 Inclination 0
 AscendingNode 0
 PericenterDist 0
 RefPlane "Equator"
 }
}

Asteroid "S2002 (4492) 1"
{
 ParentBody "Debussy system"
 Radius 4.695
 Orbit
 {
 SemiMajorAxis 1.63678142929597E-07 // 31 km
 Period 0.003036341449096 // 1.109 days
 MeanAnomaly 0
 ArgOfPericenter 180
 Eccentricity 0
 Inclination 0
 AscendingNode 0
 PericenterDist 0
 RefPlane "Equator"
 }
}
"Time is illusion. Lunchtime doubly so". Douglas N. Adams
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Permian Therapsid
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

25 Apr 2017 11:15

Space Engine seems to be fine with showing the number of moons for the largest object in the barycenter system. Take the multiple TNO Pluto for example. In this system SE shows the barycenter "Pluto-Charon" having 6 satellites and Pluto having 5. Also as another example, the binary asteroid Antiope is shown having 1 moon and barycenter "Antiope system" is shown with 2 satellites.
This is fixed for the next version. SE now "collects" satellites from the children and parent barycenters and adds them to the primary's satellites counter. Primary is the most massive object in the system.
Thanks SpaceEngineer, this would fix was vey much need.



Could I ask how the diameters of asteroids and other objects shown in the game are calculated? Is this equatorial diameter, mean diameter or what?
Equatorial. Yes I added Solar System myself manually, but processed asteroids and comets from the MPC data files (there are thousands of them).
Thanks. I was just curious. I wonder is there any possibility that the next SE version would fix several errors and missing Solar System data I have found, or have you already finished it?
Sorry if I ask this here, was just wondering the asteroid diameter calculation in the game engine as many asteroids are not very regular shaped.
SE does not calculates radius of asteroids - vice versa, it reads it from catalog script and generates model roughly of the same size. If there is no radius data provided, SE tries to calculate it from photometric parameters (absolute magnitude and slope factor) - this is the case of majority of asteroids. Of course if you trying to measure an average radius of a procedural model, it will not coincide with the catalog value, due to random nature of procedural terrain.
Is there any possibility that you could be able to add non procedural models for those asteroids we have light curve data on their possible shape? Or if you do not think that is accurate enough to add, would there be any possibility that you could add accurate shape for those asteroids, dwarf moons and comets that have been imaged close enough that we have accurate data on their shape and surface features. Would there be any possibility that there would be accurate surface maps for these asteroids, comets and dwarf moons of asteroids, TNO:s and gas giants that we have accurate data on their surface features.

Vesta, Ceres and Pluto, do already have real maps included in SE, but what about Gaspra, Ida & Dactyl, Lutetia, Eros, Toutatis, Plutos dwarf moons and some of the dwarf moons of Gas giants. Also asteroids Steins, Itokawa, Braille, Mathilde and Annefrank do have close observations on their shape and surface but are not included in SE yet. Also comets 1P, 9P, 19P, 81P, 67P and 103P have accurate data on their shape and surface. Is there any possibility you could implement correct shape and /or surface maps for at least these asteroids, comets and dwarf moons that do have accurate data on them.
 
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

25 Apr 2017 11:28

Permian Therapsid, adding everything is possible, if there are 3d models and/or elevation maps of these objects exists. I saw custom 3D models of asteroids and dwarf moons in Celestia and other planetarium software, but they cannot be used directly in SE, also, there are copyright issues. If you or someone else could somehow create an elevation maps for these bodies, including them into SE would be just few clicks.
 
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

25 Apr 2017 13:00

Mosfet, satellite of Brorfelde and both asteroids in the Debussy system have weird rotation axis direction. If you specify RotaionPeriod, you must specify Obliquity and EqAscNode as well.
 
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

26 Apr 2017 12:09

Permian Therapsid, adding everything is possible, if there are 3d models and/or elevation maps of these objects exists. I saw custom 3D models of asteroids and dwarf moons in Celestia and other planetarium software, but they cannot be used directly in SE, also, there are copyright issues. If you or someone else could somehow create an elevation maps for these bodies, including them into SE would be just few clicks.
I have discovered possible source for 3D models of several asteroids, comets and some moons. It does also have maps for some of them. I can post that on catalog fixes thread. I also have found some other sources for surface features of several asteroids and some comets that may be useful.
 
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Permian Therapsid
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

03 May 2017 07:54

Moon of Hektor is now named Skamandrios.

http://www.johnstonsarchive.net/astro/a ... 00624.html
Asteroid "Skamandrios/Hektor I/S2006 (624) 1"
{
	ParentBody	"Hektor"
	Class		"Asteroid"
	Radius		6
    Orbit
	{
		SemiMajorAxis	6.40049216957204E-06 //   957.5 km
		Period			0.0081181175 //   2.965079 days
		MeanAnomaly		0
		ArgOfPericenter	0
		Eccentricity	0.31
		Inclination		0
		AscendingNode	0
		RefPlane		"Equator"
    }
}
 
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

03 May 2017 08:25

Thanks Permian Therapsid, I'll add it to the catalog soon  :)
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

03 May 2017 11:17

Thanks Permian Therapsid, I'll add it to the catalog soon  :)
You are welcome Mosfet, It seems that many unnamed moons lack the | symbol in the SE catalogs (examples "DwarfMoon "S2000 J 11", DwarfMoon "S2003 J 18", DwarfMoon "S2003 J 4", Asteroid "S2016 (107) 1", and Asteroid "S2006 (9617) 1""). Only 18 moons in Asteroids-bin.sc have name with | like "Asteroid "S|2004 (1313) 1"" for example), could you, or I remove that symbol from the asteroid moons and we would just catalog them like this "Asteroid "S2004 (1313) 1""? That would be more consistent with the rest of the catalog of SE.
 
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

03 May 2017 16:51

Oops, that symbol will be used starting from SE 0981 version. Probably it slipped in some substitution I did, for now I'll remove it to restore name conventions for SE 0980.

SpaceEngineer, thanks, I'll check the rotation axes.
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Permian Therapsid
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

15 May 2017 14:12

Oops, that symbol will be used starting from SE 0981 version. Probably it slipped in some substitution I did, for now I'll remove it to restore name conventions for SE 0980.
Hey, would you be able to add the | = / symbol to the names of all unnamed moons of asteroids after the SpaceEngine 0.981 is officially released? I did also find some odd error with the TNO "2007 UK126/(229762) 2007 UK126" and its moon. The asteroid and its moon will not appear in game for some reason. This happened in 0.981 version.

Code:
► Show Spoiler
About the moon of 2007 OR10, I did write this. Is it ok?
http://www.johnstonsarchive.net/astro/a ... 25088.html
► Show Spoiler
And what do you think about this? Moon of Sisyphus:
http://www.johnstonsarchive.net/astro/a ... 01866.html
► Show Spoiler
 
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

15 May 2017 18:03

Hey, would you be able to add the | = / symbol to the names of all unnamed moons of asteroids after the SpaceEngine 0.981 is officially released?
Sure, even if for current beta builds SpaceEngineer took care of this. Also, given that the issue with Greek letters/Constellations name parser will probably lead to small changes in syntax, I would wait to see what happens with SE 0981 final release.
asteroid and its moon will not appear in game for some reason
I see that 2007 UK126 and its moon are included in Asteroid-bin.sc for build 8 with those orbital parameters and I'm seeing them just fine. Did you check your se.log? Maybe there's some script that is merging with the existing code?
About the moon of 2007 OR10, I did write this. Is it ok?
Seems good, but PeriodDays and SemimajorAxisKm will work only for 0981 release and following, so to maintain compatibility with 0980 they should be converted in years and AU. Per other naming conventions I think the name should have the discovery date in it, so unless it's otherwise specified in papers I would change it with something like:
Asteroid "S2010 (225088) 1"
{
 ParentBody     "(225088) 2007 OR10" 
 Class             "Asteroid"
 Radius          150
         
 Orbit
 {
 Period      0.01642744 // 6 days   
 SemiMajorAxis      1.00268806e-04 // 15000 km
 ArgOfPericenter 0
 Eccentricity    0
 Inclination     0
 RefPlane        "Equator"
 }
}
Since 2007 OR10 main body right now is included in KuiperBelt.sc, I would transfer its parameters in Asteroids-bin.sc as well.

For Sisyphus it's about the same.
You're working hard! :) I hope to have some time to update the script this weekend.
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Permian Therapsid
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COMMUNITY ADDON - Double/Multiple Asteroids fixes for SE

16 May 2017 01:27

Sure, even if for current beta builds SpaceEngineer took care of this. Also, given that the issue with Greek letters/Constellations name parser will probably lead to small changes in syntax, I would wait to see what happens with SE 0981 final release.

Ok, thanks. I did download the 0.981 some time ago so maybe I do not have everything as the latest update.
I see that 2007 UK126 and its moon are included in Asteroid-bin.sc for build 8 with those orbital parameters and I'm seeing them just fine. Did you check your se.log? Maybe there's some script that is merging with the existing code?

I did check the log and it said at least this: 
[MT] "data/catalogs/planets/Asteroids-bin.sc" line 5733: Merging bodies "Wirt/(2044) Wirt" + "Wirt/(2044) Wirt" ("data/catalogs/planets/Asteroids-small.sc" line 7992) = "Wirt/(2044) Wirt"
[MT] "data/catalogs/planets/Asteroids-bin.sc" line 5232: Merging bodies "1992 AX/(5407) 1992 AX" + "1992 AX/(5407) 1992 AX" ("data/catalogs/planets/Asteroids-small.sc" line 10885) = "1992 AX/(5407) 1992 AX"
[MT] "data/catalogs/planets/Asteroids-bin.sc" line 3206: Removing body "1998 SM165/(26308) 1998 SM165" ("data/catalogs/planets/KuiperBelt.sc" line 226)
[MT] "data/catalogs/planets/Asteroids-bin.sc" line 3673: Removing body "2003 QW111" ("data/catalogs/planets/KuiperBelt-small.sc" line 5244)
[MT] "data/catalogs/planets/Asteroids-bin.sc" line 2895: Removing body "2007 TY430/(341520) 2007 TY430" ("data/catalogs/planets/KuiperBelt-small.sc" line 2264)
[MT] "data/catalogs/planets/Asteroids-bin.sc" line 3346: Merging bodies "2007 UK126/(229762) 2007 UK126" + "2007 UK126" ("data/catalogs/planets/Asteroids-Rem.sc" line 22) = "2007 UK126/(229762) 2007 UK126"
[MT] "data/catalogs/planets/Asteroids-bin.sc" line 3286: Removing body "Altjira/(148780) Altjira" ("data/catalogs/planets/KuiperBelt-small.sc" line 1593)
[MT] "data/catalogs/planets/Asteroids-bin.sc" line 3812: Removing body "Borasisi/(66652) Borasisi" ("data/catalogs/planets/KuiperBelt-small.sc" line 616)
[MT] "data/catalogs/planets/KuiperBelt-small.sc" line 575: Merging bodies "Ceto/(65489) Ceto" + "Ceto" ("data/catalogs/planets/Asteroids-Rem.sc" line 21) = "Ceto/(65489) Ceto"
[MT] "data/catalogs/planets/Asteroids-bin.sc" line 5170: Removing body "Kandrup/(12008) Kandrup" ("data/catalogs/planets/Asteroids-small.sc" line 12299)
[MT] ERROR: Body "S2008 (229762) 1" has unknown or no parent star
[MT] ERROR: Body "S2008 (229762) 1" has unknown parent object "2007 UK126"
Seems good, but PeriodDays and SemimajorAxisKm will work only for 0981 release and following, so to maintain compatibility with 0980 they should be converted in years and AU. Per other naming conventions I think the name should have the discovery date in it, so unless it's otherwise specified in papers I would change it with something like:
Asteroid "S2010 (225088) 1"
{
 ParentBody     "(225088) 2007 OR10" 
 Class             "Asteroid"
 Radius          150
         
 Orbit
 {
 Period      0.01642744 // 6 days   
 SemiMajorAxis      1.00268806e-04 // 15000 km
 ArgOfPericenter 0
 Eccentricity    0
 Inclination     0
 RefPlane        "Equator"
 }
}
Since 2007 OR10 main body right now is included in KuiperBelt.sc, I would transfer its parameters in Asteroids-bin.sc as well.

For Sisyphus it's about the same.
You're working hard! [img=24x24]http://forum.spaceengine.org/images/smi ... _smile.png[/img] I hope to have some time to update the script this weekend.

Ok, thanks! I have tested the 0.981 version and it looks nice, I also did some addons that include 220 new Sol System asteroids and I did some changes for comets file. I did post them on 0.981 beta test thread. This is because I did base the comets.sc update on 0.981 version.

For some reason my SE will not have 2003 QW111, 2007 TY430, 2007 UK126. They are missing. What could that be?

I did also find problem with Kandrup. The info text when having the system map mode is flashing so fast that its hard to read.

(EDIT: I do have in fact 2003 QW111, 2007 TY430. They are now named objects Manwe and Mors. But the third object (2007 UK126) is missing.

(EDIT2: I did modify Asteroids-Rem.sc by removing the command for removing 2007 UK126 and now it is fine. Would it be good idea to remove this command from the original file if it is not needed and can cause these kind of problems?)
Last edited by Permian Therapsid on 16 May 2017 01:47, edited 1 time in total.

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