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Asteroids
http://forum.celestialmatters.org/viewtopic.php?f=18&t=629
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Author:  John Van Vliet [ Sat, 15-02-14, 21:57 GMT ]
Post subject:  Asteroids

There are a bunch with published SPICE orbits
ftp://naif.jpl.nasa.gov/pub/naif/generi ... asteroids/
"codes_300ast_20100725.bsp" is from 2010
for a list of covered objects
ftp://naif.jpl.nasa.gov/pub/naif/generi ... maries.txt

############################

### Steins ###

You will notice that "2000021 LUTETIA*" is listed in "codes_300ast_20100725.bsp"
but
Not Steins object #"2002867"

for that use the HORIZONS "telnet" interface ( or the gzip on the g-drive link)
viewtopic.php?f=18&t=577#p10830
Code:
telnet ssd.jpl.nasa.gov 6775


grab the steins.xfr > then use "tobin" to convert it is a bsp

now for the mesh :
There is the original shape file ( mostly it is 90x46 and not 73x37 points and has been rotated to 0 lat/long in the center )
viewtopic.php?f=18&t=626

the one i am using is a edited version ( in the gzip on the g-drive link)
added craters from the two " good " images and added FBM noise to the DEM

Image Image Image Image Image

the ssc file
Code:

"Steins-2867" "Sol"

{
  Class "asteroid"
  Mesh    "Steins.bin.cmod"
# Texture ""       # coded into the cmod
Orientation [ 90 1 0 0 ]
  Radius               4.47
  Albedo               0.34

  OrbitFrame { EclipticJ2000 { Center "Sol" }}

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

  SpiceOrbit
  {
    Kernel "Stiens.bsp"
    Target "2002867"
    Origin "10"
    Period  3
    BoundingRadius 1e10
  }
  PrecessingRotation  # this needs to be set  to the Rosetta flyby
  {
    Inclination        40      # random
    AscendingNode      5       # random
    Period             10      # random
    PrecessionPeriod   0.01     # random
  }
}




   Location "Topaz" "Sol/Steins-2867"
   {
     LongLat [ 0.0 -7.7 -0.12 ]
     Size 1
     Importance  5.0
     Type "AA"
   }


locations do not work well on a mesh , far from well .
so i only put ONE point


the drop in add on
Steins.tar.gz -- 17.8 Mib
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing

Author:  John Van Vliet [ Tue, 01-04-14, 20:13 GMT ]
Post subject:  Re: Asteroids

Asteroid 52760

this is in HORIZONS
Code:
telnet horizons.jpl.nasa.gov 6775

hit <enter>
Code:
JPL Horizons, version 3.87
Type `?' for brief intro, `?!' for more details
System news updated Mar 10, 2014
 
Horizons>

type in 52760
Code:

JPL Horizons, version 3.87
Type `?' for brief intro, `?!' for more details
System news updated Mar 10, 2014
 
Horizons> 52760
*******************************************************************************
JPL/HORIZONS                  52760 (1998 ML14)            2014-Apr-01 12:53:39
Rec #: 52760 (+COV)   Soln.date: 2014-Mar-22_11:55:06    # obs: 588 (1998-2014)
 
FK5/J2000.0 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs):
 
  EPOCH=  2455411.5 ! 2010-Aug-03.00 (CT)          Residual RMS= .39079       
   EC= .6206403612479247   QR= .9146906665047532   TP= 2455181.8787248693     
   OM= 338.9157132506253   W=  20.12108463944722   IN= 2.433080268528047       
   A= 2.411143867369969    MA= 60.44794087990935   ADIST= 3.907597068235185   
   PER= 3.74406            N= .263250603           ANGMOM= .020944109         
   DAN= .93658             DDN= 3.55285            L= 359.0201117             
   B= .8367706             MOID= .0157662          TP= 2009-Dec-16.3787248693 
 
Asteroid physical parameters (km, seconds, rotational period in hours):       
   GM= n.a.                RAD= .500               ROTPER= 14.98               
   H= 17.5                 G= .150                 B-V= n.a.                   
                           ALBEDO= n.a.            STYP= n.a.                 
 
ASTEROID comments:
1: soln ref.= JPL#127, PHA  OCC=0       radar(11 delay, 7 Dop.)
2: source=ORB
*******************************************************************************
 Select ... [A]pproaches, [E]phemeris, [F]tp,[M]ail,[R]edisplay, [S]PK,?,<cr>:

you need the SPK , so type in < s > and hit < enter >

Code:

 Searching for SPK object ID number ...   found.
 Assigned SPK object ID:  2052760
 
 Enter your Internet e-mail address [?]:


type in your address , and confirm the challenge with "yes " < y >
Code:
SPK text transfer format  [ YES, NO, ? ] :

yes you want the xfr ( and use "tobin" in cspice on YOUR operating system )
Code:
SPK object START [ t >= 1900-Jan-01, ? ] :

you want the full range so use that start date
Type in 1900-Jan-01 and hit < enter >
Code:
SPK object STOP  [ t <= 2101-Jan-01, ? ] :

SPK object STOP [ t <= 2101-Jan-01, ? ] :
you want the full range so type in
2101-Jan-01 and hit < enter >
Code:

 Current integration step:
  2415152.88740  1900 May 13.38740    -1.0328378
 Current integration step:
  2488282.19109  2100 Aug 01.69109     1.2290876
 
 Binary SPK file created.
 Add more objects to file  [ YES, NO, ? ] :

say NO -- < n > and hit < enter >
Code:
 Converting SPK to portable transfer format .... standby 
 After FTP transfer, convert file back to binary form.
 
 You have 30 minutes to retrieve the following by anonymous FTP:
   Machine name:  ssd.jpl.nasa.gov
   Directory   :  cd to "/pub/ssd/"
   File name   :  wld10805.15
   File type   :  ASCII (transfer format)
   Full path   :  ftp://ssd.jpl.nasa.gov/pub/ssd/wld?????.15
 
 Select ... [E]phemeris, [M]ail, [R]edisplay, ?, <cr>:

the text based kernel is at this ftp address
"ftp://ssd.jpl.nasa.gov/pub/ssd/wld?????.15"
( the ?????? is a unique identifier for the file )
most web browsers have NO problems in using FTP for download
that address IS the text kernel
so use "Save page AS!!! "
and save it as
52760.xfr

oruse wget or ftp or curl, or your favorite tool to save the link

then run "tobin on it
Code:
cd /to the /location/you /saved /the/file
tobin 52762.xfr 52762.bsp

and copy the 2.7 Meg. binary file to the "data" folder in the add on

the ssc should look something like this
Code:

"52760" "Sol"

{
  Class "asteroid"
  Mesh    "52760.bin.cmod"   # this is MY testing mesh , use what you want
# Texture ""       # coded into the cmod
  Orientation [ 90 1 0 0 ]
  Radius               0.5    # approx. it is about 1 KM in diameter
  Albedo               0.34   # random needs to be refined still

  OrbitFrame { EclipticJ2000 { Center "Sol" }}

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

  SpiceOrbit
  {
    Kernel "52760.bsp"
    Target "2052760"
    Origin "10"
    Period  4
    BoundingRadius 1e10
  }
  PrecessingRotation
  {
    Inclination        20      # random
    AscendingNode      1       # random
    Period             14.98    # JPL Small-Body Database
    PrecessionPeriod   0.02     # random
  }
}



Image Image

drop in add on
reuploaded to fix bug ( z axis off by -90 deg)
52760.tar.gz - 15.5 Meg
( cmod,bsp,ssc,2k texture,4k normalmap )

https://drive.google.com/file/d/0B6ZYAd ... sp=sharing
or
use the original in the "shape model " thread
viewtopic.php?f=4&t=636

Author:  John Van Vliet [ Sun, 08-06-14, 4:01 GMT ]
Post subject:  Re: Asteroids

--- /* 2014 HQ124 */ ---
there is a near Earth ( well 3.5 times the distance to the Moon ) zipping by tomorrow

http://www.space.com/26129-beast-astero ... bcast.html
Image Image Image Image

2014_HQ124.tar.gz - 6.6 Meg

https://drive.google.com/file/d/0B6ZYAd ... sp=sharing

Author:  John Van Vliet [ Sat, 14-06-14, 1:37 GMT ]
Post subject:  Re: Asteroids

well i will have to update the mesh
Image
"Radar Observations of Asteroid 2014 HQ124"
http://www.jpl.nasa.gov/spaceimages/det ... d=PIA18412
http://photojournal.jpl.nasa.gov/catalog/PIA18412
--video--
http://www.jpl.nasa.gov/video/index.php?id=1310

Author:  John Van Vliet [ Thu, 14-08-14, 2:00 GMT ]
Post subject:  Re: Asteroids

in the mean time before hand carving a new mesh for HQ124

The DAWN teem updated the released data
http://dawndata.igpp.ucla.edu/tw.jsp?section=data

So a NEW Vesta mesh texture and normal map
the OLD data set had a lot of the northpole missing .
The new data has much MORE of the northpole .

2k copies
Image Image
the DEM ( height map and now mesh and normal )
http://dawndata.igpp.ucla.edu/tw.jsp?se ... 2013_02_13
the DTM ( texture )
http://dawndata.igpp.ucla.edu/tw.jsp?se ... R_HAMO_DTM

now Vesta is in the HORIZONS database
so telnet in as in the above posts and other posts
grab the spk ( text tile) transfer file for Vesta run "tobin" on it
Code:
 
BRIEF -- Version 3.0.0, January 14, 2008 -- Toolkit Version N0064
 
 
Summary for: Vesta.bsp
 
Body: VESTA (2000004) w.r.t. SUN (10)
      Start of Interval (ET)              End of Interval (ET)
      -----------------------------       -----------------------------
      1900 JAN 01 00:00:00.000            2101 JAN 01 00:00:00.000
 


you will also need , depending on HOW one installs this a copy of :
"pck00010.tpc"
"naif0010.tls"
in the vesta/data folder ( same folder that Vesta.bsp is in )

then the ssc file
Vesta IS in the small bodies ssc so "replace" is needed
Code:

Replace "4 Vesta:Vesta" "Sol"

{
  Class "asteroid"
  Mesh    "Vesta.low.bin.cmod"
  # Texture ""       # coded into the cmod
  # NormapMap ""     # coded into the cmod
  Orientation [ 90 1 0 0 ] # did NOT rotate it on export to cmod
  Radius               525
  Albedo               0.2  # guess, a bit random

  OrbitFrame { EclipticJ2000 { Center "Sol" }}

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

  SpiceOrbit
  {
    Kernel  "Vesta.bsp"
    Target "2000004"
    Origin "10"
    Period  3.63
    BoundingRadius 1e10
  }
     SpiceRotation
    {
      Kernel          [   "pck00010.tpc"  "naif0010.tls"  ]
      Frame               "IAU_VESTA"
    }
}


a screenshot of the low,med ,and hi res mesh
Image Image Image


a drop-in low res mesh and texture add on is here on my G-drive
Vesta.low.zip - 7.3 Meg
https://googledrive.com/host/0B6ZYAd08t ... ta.low.zip
2k texture and Normalmap and 3.5 Meg mesh

then a med res and HI res mesh and texture ONLY zip files are here
4k medium res texture and mesh
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing
4k texture and normal
and a 14.3 meg mesh

Author:  John Van Vliet [ Mon, 16-02-15, 1:01 GMT ]
Post subject:  Re: Asteroids

the jpl naif ftp site added a asteroid bsp last December ( 12-2-2014))

ftp://ssd.jpl.nasa.gov/pub/eph/small_bo ... ids_de430/

it lists 343 bodies

Author:  John Van Vliet [ Thu, 05-03-15, 21:57 GMT ]
Post subject:  Ceres

---- edit
i fixed the error with the rotation




The Dawn team released a very early lowres map
http://dawn.jpl.nasa.gov/multimedia/Cra ... _Ceres.asp
-- png image --
Image
This map is 0 to 360 , the second bright spot is at +240 long + 20 lat the first one is split in two at 0 and 360

so the map will need to be offset by 180 Degrees

this Asteroid is in the BIG 1.1 Gig "ast343de430.bsp"

However the Dawn team has a Ceres only kernel
posted on (11/25/2014) but created on ( 07/24/14))
ftp://naif.jpl.nasa.gov/pub/naif/DAWN/kernels/spk/
"sb_ceres_140724.bsp"
( or use the HORIZONS telnet )


the rotation model will need the "dawn_ceres_v02.tpc"
ftp://naif.jpl.nasa.gov/pub/naif/DAWN/kernels/pck

and the body frame ( early version)"dawn_ceres_v00.tf"
ftp://naif.jpl.nasa.gov/pub/naif/DAWN/kernels/fk/


and the current leap second "naif0011.tls"
ftp://naif.jpl.nasa.gov/pub/naif/DAWN/kernels/lsk/

Code:
Replace "1 Ceres:Ceres:A899 OF" "Sol"
{
   Class "dwarfplanet"
   Texture "pia18923-ceresmap_lg.png"
   Color [ 1.000 0.945 0.881 ]
   BlendTexture true
        SemiAxes [ 487.3 487.3 454.7 ] # from dawn_ceres_v02.tpc

    OrbitFrame { EclipticJ2000 { Center "Sol" }}
    BodyFrame  { EclipticJ2000 { Center "Sol" }}

    Beginning  "2012 02 01 00:00:00.000"
    Ending   "2200 02 12 00:00:00.000"       # minus 1 month for drawing orbit
    SpiceOrbit
    {
      Kernel  "sb_ceres_140724.bsp"
      Target  "2000001"
      Origin  "10"
      Period  4.6
      BoundingRadius 1e10
    }

     SpiceRotation
    {
       Kernel           [  "dawn_ceres_v02.tpc"  "dawn_ceres_v00.tf" "naif0011.tls"  ]
       Frame               "CERES_FIXED"
     }

   Albedo 0.113
}




and the folder layout for the folder "Ceres"
Code:
.
├── Ceres.ssc
├── data
│   ├── dawn_ceres_v02.tpc
     ├── dawn_ceres_v00.tf
│   ├── naif0011.tls
│   └── sb_ceres_140724.bsp
└── textures
    └── medres
        └── pia18923-ceresmap_lg.png




-- fixed

Author:  Limax7 [ Sun, 08-03-15, 10:54 GMT ]
Post subject:  Re: Ceres

John Van Vliet wrote:
---- edit
i fixed the error with the rotation




The Dawn team released a very early lowres map
http://dawn.jpl.nasa.gov/multimedia/Cra ... _Ceres.asp
-- png image --
Image

( at this time i do not know if that map is 0 to 360 or -180 to +180 --- BUT being the USA and we do EVERYTHING different from the rest of the WORLD i am GUESSING 0 to 360 )
so the map will need to be offset by 180 Degrees

this Asteroid is in the BIG 1.1 Gig "ast343de430.bsp"

However the Dawn team has a Ceres only kernel
posted on (11/25/2014) but created on ( 07/24/14))
ftp://naif.jpl.nasa.gov/pub/naif/DAWN/kernels/spk/
"sb_ceres_140724.bsp"
( or use the HORIZONS telnet )


the rotation model will need the "dawn_ceres_v02.tpc"
ftp://naif.jpl.nasa.gov/pub/naif/DAWN/kernels/pck

and the body frame ( early version)"dawn_ceres_v00.tf"
ftp://naif.jpl.nasa.gov/pub/naif/DAWN/kernels/fk/


and the current leap second "naif0011.tls"
ftp://naif.jpl.nasa.gov/pub/naif/DAWN/kernels/lsk/

Code:
Replace "1 Ceres:Ceres:A899 OF" "Sol"
{
   Class "dwarfplanet"
   Texture "pia18923-ceresmap_lg.png"
   Color [ 1.000 0.945 0.881 ]
   BlendTexture true
        SemiAxes [ 487.3 487.3 454.7 ] # from dawn_ceres_v02.tpc

    OrbitFrame { EclipticJ2000 { Center "Sol" }}
    BodyFrame  { EclipticJ2000 { Center "Sol" }}

    Beginning  "2012 02 01 00:00:00.000"
    Ending   "2200 02 12 00:00:00.000"       # minus 1 month for drawing orbit
    SpiceOrbit
    {
      Kernel  "sb_ceres_140724.bsp"
      Target  "2000001"
      Origin  "10"
      Period  4.6
      BoundingRadius 1e10
    }

     SpiceRotation
    {
       Kernel           [  "dawn_ceres_v02.tpc"  "dawn_ceres_v00.tf" "naif0011.tls"  ]
       Frame               "CERES_FIXED"
     }

   Albedo 0.113
}




and the folder layout for the folder "Ceres"
Code:
.
├── Ceres.ssc
├── data
│   ├── dawn_ceres_v02.tpc
     ├── dawn_ceres_v00.tf
│   ├── naif0011.tls
│   └── sb_ceres_140724.bsp
└── textures
    └── medres
        └── pia18923-ceresmap_lg.png




-- fixed



Thank you. I just added this kernels :) Works fine.

Author:  John Van Vliet [ Fri, 03-07-15, 21:31 GMT ]
Post subject:  Re: Asteroids

Near Earth Asteroid Bennu / 101955bennu / 1999 RQ36
Image Image

feel free to use HORIZONS "telnet" for a "Bennu.xfr" then use "tobin" to make a bsp file but that is included


a unaltered mesh in in the "shape model" thread
viewtopic.php?f=4&t=636#p13291

This spice add on uses a bit bigger mesh and a normal map ( added synthetic noise and craters )
Code:
 "Bennu:101955bennu:1999 RQ36" "Sol"
{
  Class "asteroid"
  Mesh    "Bennu.bin.cmod"
  Orientation [ 90 1 0 0 ] # did NOT rotate it on export to cmod
  Radius               0.25
  Albedo               0.09

  OrbitFrame { EclipticJ2000 { Center "Sol" }}

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

  SpiceOrbit
  {
    Kernel "Bennu.bsp"
    Target "2101955"
    Origin "10"
    Period  1.1
    BoundingRadius 1e10
  }
   PrecessingRotation
  {
    Inclination        5        # random
    AscendingNode      45       # random
    Period             4.29746  # measured by  Arecibo
    PrecessionPeriod   0.01     # random
  }
}




a 16.4 Meg binary cmod
a 4k texture and Normalmap
Image Image

"Bennu.SPICE.zip" 34.4 Meg
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing


.

Author:  John Van Vliet [ Sat, 04-07-15, 20:29 GMT ]
Post subject:  Re: Asteroids

just having fun


Image Image
Image Image

but about 1 / 2 the family is "over the river " ( from Detroit)
Image Image

Author:  John Van Vliet [ Thu, 16-06-16, 0:02 GMT ]
Post subject:  Re: Asteroids

a NASA announcement
http://www.jpl.nasa.gov/news/news.php?release=2016-154

ast 2016 H03


short ssc and a spice kernel , 2 4k textures ,and a 10 meg cmod

2016H03.medres.zip 22.7 MiB
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing


see this thread for screenshots
viewtopic.php?f=4&t=845

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