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John Van Vliet
 Post subject: KBO and comets
PostPosted: Sat, 21-09-13, 4:43 GMT 
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EDITED!!!!!

--- the FINAL orbit from Dec. 03 2013 from HORIZONS

comet c/2012 S1 AKA ISON




the below ssc is the final seeing as it broke up passing The Sun --

Code:

"ISON:C/2012 S1" "Sol"

    {
       Class "comet"
       Mesh    "ISON.bin.cmod"
       
       Radius               0.5    # guess http://www.nasa.gov/mission_pages/swift/bursts/ison.html
       Albedo               0.2      # guess
       Orientation [ 90 1 0 0 ]
       OrbitFrame { EclipticJ2000 { Center "Sol" }}
       OrbitColor [ 0.9 0.1 0.1 ]
       Beginning  "1900 01 01 00:00:00.000"
       Ending     "2014 01 01 00:00:00.000" # set to Jan1 ,it was being looked for ( r.i.p.)
       
       SpiceOrbit
       {
         Kernel "ISON.final.bsp"
         Target "1003203"
         Origin "10"   
         Period  10
         BoundingRadius 1e10
       }     
       PrecessingRotation
   {
       Inclination       18     # random
       AscendingNode    90    # random
       Period          10     # random
       PrecessionPeriod   0.314  # random
   }
    }




a screenshot for Sep. 29 -- nine days from now
Image
a cel: link using the above and the current de430.bsp
--------------
cel://Follow/Sol:Mars:Phobos/2013-09-29 ... rc=0&ver=3
--------------
C/2012 S1 rise over Gale Crater , on Oct. 2
Image
the mesh and texture
Image

The G-drive archive
ISON.tar.gz -- 8.4 Meg
includes :
mesh , a 2k texture , 2k normal map ,and the spice kernel
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing




-
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John Van Vliet
PostPosted: Mon, 23-09-13, 20:31 GMT 
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Posts: 806
Location: N 42.38846 W 83.45456
Comet 2014 "Siding Spring" C/2013 A1

---------- edit the below section is out of date -----------------
in the same ftp folder
pub/naif/generic_kernels/spk/comets/
is also the 2014 "Siding Spring" C/2013 A1 comet
so just as above a rather simple ssc file can be made
-- DL the "siding-spring.bsp" ---
ftp://naif.jpl.nasa.gov/pub/naif/generi ... spring.bsp
------------- the above is out of date -----------------

2014 "Siding Spring" C/2013 A1

the data for the SPICE orbit is in HORZONS
use the telnet interface

--- save as : SidingSpring.SPICE.ssc --- UPDATED on April 04 ,2014
Code:
"Siding-Spring:C/2013 A1" "Sol"

    {
       Class "comet"
       Mesh    "SidingSpring.bin.cmod"
      # Texture ""       # coded into the cmod
      # NormalMap ""     # coded into the cmod
      Orientation [ 90 1 0 0 ]
       Radius               4.0
       Albedo               0.2

       OrbitFrame { EclipticJ2000 { Center "Sol" }}

       Beginning  "1900 01 01 00:00:00.000 "
       Ending      "2101 01 01 00:00:00.000"
       
       SpiceOrbit
       {
         Kernel "SidingSpring.bsp"
         Target "1003228"
         Origin "10"   
         Period  10
         BoundingRadius 1e10
       }     
       PrecessingRotation
       {
            Inclination        20      # random
            AscendingNode      14      # random
            Period             12      # random
            PrecessionPeriod    3.14  # random
       }
    }




Image

Image

drop in add-on SidingSpring.tar.gz -- 8.2 Meg ( with spice kernel )
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing

and a gallery of this comet as seen from Gale Crater
http://imgbox.com/g/7sgBhPtLA9

the rover will have SOME VIEW in Oct. 2014
Image
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John Van Vliet
PostPosted: Thu, 21-11-13, 5:18 GMT 
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updated ISON kernel
nov. 15 solution
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing
for the above link select "download" from the "file" link

Image Image
Image Image
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John Van Vliet
PostPosted: Thu, 23-01-14, 5:50 GMT 
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Location: N 42.38846 W 83.45456
--- Edit ---
this is the PRE Rosetta encounter mesh and data
it is so old that i have removed the links
see the post farther along in this thread

Comet 67P/Churyumov_Gerasimenko

there will be a all in one zip at the end , but for PRACTICE you might want to at least use the telnet HORIZONS interface to grab the
67P/Churyumov_Gerasimenko .xfr spice data
then run xfr2bin on it to make a .bsp

this is another rather simple one , like the two in the preceding posts
Code:
"67p : 67P/Churyumov_Gerasimenko" "Sol"

{
  Class "comet"
  Mesh    "67p.bin.cmod"
# Texture ""       # coded into the cmod
  Radius               2.455
  Albedo               0.2

  OrbitFrame { EclipticJ2000 { Center "Sol" }}

  Beginning  "1900 01 01 00:00:00.000"
  Ending     "2101 01 01 00:00:00.000"

  SpiceOrbit
  {
    Kernel "Churyumov_Gerasimenko.bsp"
    Target "1000012"
    Origin "10"
    Period  9
    BoundingRadius 1e10
  }
  PrecessingRotation
  {
    Inclination        10      # random
    AscendingNode      5       # random
    Period             15      # random
    PrecessionPeriod   5.0     # random
  }
}

as was posted on

there is a shape file for this comet
very lores for now and WILL improve once Rosetta goes into orbit and fallows it in
for this i am using a "added detail" mesh

a full add on , just drop into the extras folder



The 13.2 MiB zip contains a 10.6 Mib cmod a 3.8 MiB 4k texture
and the raw data used for the cmod

UPDATE

there is an updated mesh ( NO!!! texture yet ,only a shape file 3d mesh )

the zip is a 2.7 meg *.obj mesh , it will need converting to cmod for use

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John Van Vliet
 Post subject: Re: KBO and comets
PostPosted: Sun, 13-04-14, 20:10 GMT 
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Joined: Tue, 04-09-07, 21:55 GMT
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Location: N 42.38846 W 83.45456
ISON and SidingSpring
updated
ison -final
sidingspring just updated

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John Van Vliet
 Post subject: Re: KBO and comets
PostPosted: Wed, 21-05-14, 5:54 GMT 
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Joined: Tue, 04-09-07, 21:55 GMT
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Location: N 42.38846 W 83.45456
Comet 209P/LINEAR

with the meteor shower on the 23'd/24'th ( North America ) of 100 to 400 per Hour expected
and the comet's close approach on the 29'th ( 8.3 million kilometers)
see:
http://www.slate.com/blogs/bad_astronom ... inear.html

Image Image Image

two shots of the mesh in blender
( 100% artistic )
Image Image

slightly bigger than others but not too large

209P_LINEAR.tar.gz -- 11.9 Meg -- Bug fix
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing
Code:
.
├── 209P_LINEAR.SPICE.ssc
├── data
│   ├── 209P_LINEAR.bsp
│   └── 209P_LINEAR.txt
├── models
│   └── 209p.bin.cmod
└── textures
    └── medres
        └── 2k.209AO2.inv.png

and the ssc file ( included in the gzip )
Code:


"209P_LINEAR" "Sol"

    {
       Class "comet"
       Mesh    "209p.bin.cmod"
      # Texture ""       # coded into the cmod
      Orientation [ 90 1 0 0 ]
       Radius               0.3
       Albedo               0.2

       OrbitFrame { EclipticJ2000 { Center "Sol" }}

       Beginning  "1900 01 01 00:00:00.000 "
       Ending     "2101 01 01 00:00:00.000"
       
       SpiceOrbit
       {
         Kernel "209P_LINEAR.bsp"
         Target "1000487"
         Origin "10"   
         Period  10
         BoundingRadius 1e10
       }     
       PrecessingRotation
       {
            Inclination        5      # random
            AscendingNode      4      # random
            Period             16      # random
            PrecessionPeriod    6  # random
       }
    }

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John Van Vliet
 Post subject: Re: KBO and comets
PostPosted: Thu, 01-01-15, 9:34 GMT 
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Joined: Tue, 04-09-07, 21:55 GMT
Posts: 806
Location: N 42.38846 W 83.45456
a new one for the new year
comet 2014Q2 Lovejoy

Image Image Image Image
the mesh in the Blender screenshot it the HIRES 68 meg mesh

the zip file with the spice kernel -- 20 meg
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing
.
├── 2014Q2.lovejoy.SPICE.ssc
├── data
│   └── 2014Q2.bsp --2.7 Meg
├── models
│   └── Lovejoy.bin.cmod -- 4.1 Meg
└── textures
└── medres
├── Lovejoy.inv.png -- 3.6 Meg
└── LovejoyNormal.inv.png -- 11.6 Meg

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John Van Vliet
 Post subject: Re: KBO and comets
PostPosted: Sat, 23-07-16, 1:53 GMT 
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Location: N 42.38846 W 83.45456
with the recently posted KBO "2015_RR245"
A body a bit smaller than Pluto approx. 696 Km Dia. and a 700 year orbit
-- just something i am playing with in blender
-- the lowres cmod 5 meg and 4k normalmap
Image

the zip on my G-drive
"2015_RR245.zip" -- 21.1 MiB
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing

2015_RR245 is in Horizons so it is rather easy to make a spice kernel , but it is only 201 years of the 700 orbit

and i am betting that using just one point and the horizons web based orbital data will do
Code:
 {
    OrbitFrame { EclipticJ2000 { Center "Sol" }}
    BodyFrame  { EquatorJ2000  { Center "Sol" }}
    Ending      "1900 02 01 00:00:00.000"  # added 1 month

    EllipticalOrbit
    {
      Epoch            2415051.500000000        # 1900 02 07
      Eccentricity     5.823389488677905E-01        # well Ecc.
      AscendingNode    2.113894062683690E+02        # Deg.
      SemiMajorAxis    8.167565386666841E+01        # Km.
      ArgOfPericenter  2.613102772986378E+02        # Deg.
      MeanAnomaly      2.654866603878056E+02        # Deg.
      Inclination      7.572347954392313E+00        # Deg.
      Period           2.696108445474537E+05        # days
    }

or use the spice kernel from the telnet horizons
and this
Code:

 "2015 RR245" "Sol"
{
  Class           "dwarfplanet"
  Mesh            "2015_RR245.bin.cmod"
  Color           [0.6 0.5 0.5 ]
  HazeColor       [ 0.8 0.6 0.3 ]
  HazeDensity     0.4
  SpecularColor   [ 0.07 0.06 0.06 ]
  SpecularPower   1.0
  Radius          696 # KM
  OrbitColor      [ 1 1 0]

 
  Timeline
  [
  {
    OrbitFrame { EclipticJ2000 { Center "Sol" }}
    BodyFrame  { EquatorJ2000  { Center "Sol" }}
    Ending      "1900 02 01 00:00:00.000"  # added 1 month

    EllipticalOrbit
    {
      Epoch            2415051.500000000        # 1900 02 07
      Eccentricity     5.823389488677905E-01        # well Ecc.
      AscendingNode    2.113894062683690E+02        # Deg.
      SemiMajorAxis    8.167565386666841E+01        # Km.
      ArgOfPericenter  2.613102772986378E+02        # Deg.
      MeanAnomaly      2.654866603878056E+02        # Deg.
      Inclination      7.572347954392313E+00        # Deg.
      Period           2.696108445474537E+05        # days
    }

   UniformRotation
    {
      Period               100
      Inclination          0
      AscendingNode       180
      MeridianAngle        0
    }
  }
  # begin SPICE
  {
    OrbitFrame { EclipticJ2000 { Center "Sol"}}
    BodyFrame  { EclipticJ2000 { Center "Sol"     }}
   
    Ending     "2100 12 01 00:00:00.000" # subtracted 1 month
   

    SpiceOrbit
    {
      Kernel    "2015_RR245.bsp"
      Target    "3753610"
      Origin    "10" 
      Period          201
      BoundingRadius  1e10
    }

   UniformRotation
    {
      Period               100
      Inclination          0
      AscendingNode       180
      MeridianAngle        0
    }
  }
  # After SPICE
  {
    OrbitFrame { EclipticJ2000 { Center "Sol" }}
    BodyFrame  { EquatorJ2000  { Center "Sol" }}

    EllipticalOrbit
    {
      Epoch           2488403.500000000         #  2099 11 28
      Eccentricity    5.878280708748990E-01         # well Ecc.
      AscendingNode   2.118886125865089E+02         # Deg.
      SemiMajorAxis   8.234041697236565E+01         # AU.
      ArgOfPericenter 2.610598012897592E+02        # Deg.
      MeanAnomaly     3.861904718980631E+00         # Deg.
      Inclination     7.548342614050390E+00         # Deg.
      Period          2.729091016083079E+05         # days
    }

    UniformRotation
    {
      Period               100
      Inclination          0
      AscendingNode       180
      MeridianAngle        0
    }
  }
 ]
}


Image

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John Van Vliet
 Post subject: Re: KBO and comets
PostPosted: Tue, 16-08-16, 23:21 GMT 
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Joined: Tue, 04-09-07, 21:55 GMT
Posts: 806
Location: N 42.38846 W 83.45456
updated 67p

Image Image Image

using the spice location data from Horizons, and rotation data from Rosetta pds kernels
this IS a big cmod 55 MiB so...
This Comet is using the SOL center and not the barycenter

67p.zip - 46.2 MiB
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing

a rather short ssc
Code:

"67p : 67P/Churyumov_Gerasimenko" "Sol"

{
  Class "comet"
  Mesh "67p.navcam.bin.cmod"
  Radius               2.455
  Albedo               0.2


  OrbitFrame { EclipticJ2000 { Center "Sol" }}

  Beginning  "1900 01 01 00:00:00.000"
  Ending     "2101 01 01 00:00:00.000"

  SpiceOrbit
  {
    Kernel "Churyumov_Gerasimenko.bsp"
    Target "1000012"
    Origin "10"
    Period  9
    BoundingRadius 1e10
  }
 SpiceRotation
    {
      Kernel
      [
     
      "naif0012.tls"
      "catt_dv_238_01_______00320.bc"
      "ros_churyumov_v01.tf"
      ]
     
      Frame   "67P/C-G_CK"
    }

}



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