Sikhote Alin meteorite data

[Medusa]

Hi,

last night I put in something I definitely want (and had before) in a solar system simulator: the Sikhote Alin meteorite of 1947.
If you're interested in detail knowledge about this fall, see
http://www.geocities.com/diane_va/sikhote-alin (german)
http://www.geocities.com/diane_va/sikho ... dex_E.html (english)
...and be sure the screenshots of the old Ssystem 1.6 will soon be replaced by some of Celestia.
BTW, has anyone in here trajectory data of the Tunguska 1908 fireball...?

Find below the .ssc file. For an appropriate .cms file, derive something you like from asteroids.cms -- nobody knows how the body looked like before impact. (To see remains, visit the link above).

Catch a falling star, ~Medusa.


#
# Sikhote Alin Meteorite data for Celestia
#
# by Diane Neisius aka ~Medusa (diane_va@yahoo.com)
#
# Data based on work of
# V. G Fesenkov, Meteoritika 9(1951) p.27
#
#

"Sikhote Alin" "Sol"
{
Class "asteroid"
Mesh "sikhote-alin.cms"
Texture "asteroid.jpg"
Radius 0.002
Ending "1947 02 12 00:00" # impact (orig. 00:38 UT)
# couldn't get it better

EllipticalOrbit {
Period 3.1811546 # computed from dist
SemiMajorAxis 2.12724 # 2.163 is original value, doesn't hit earth
Eccentricity 0.536
Inclination 9.4
AscendingNode 323.203 # 322.5 is original value, doesn't hit earth
ArgOfPericenter 181.3
MeanAnomaly 359.982 # used for fineadjust (should be 0)
Epoch "1947 02 13 00:43" # theoretical time of perihel passage
}

RotationPeriod 2.5 # guess
Albedo 0.13 # iron
}

[TERRIER]

I like this inclusion for Celestia.

Just for a bit of fun, I've slightly modified the ssc.

Code: Select all

#
# Sikhote Alin Meteorite data for Celestia
#
# by Diane Neisius aka ~Medusa (diane_va@yahoo.com)
#
# Data based on work of
# V. G Fesenkov, Meteoritika 9(1951) p.27
#
#Slighly altered by TERRIER

"Sikhote Alin Asteroid" "Sol"
{
Class "asteroid"
Mesh "asteroid.cms"
Texture "Asteroid.jpg"
Radius 0.002 
Ending "1947 02 11 23:42:27" 

EllipticalOrbit {
Period 3.1811546 # computed from dist
SemiMajorAxis 2.12724 # 2.163 is original value, doesn't hit earth
Eccentricity 0.536
Inclination 9.4
AscendingNode 323.203 # 322.5 is original value, doesn't hit earth
ArgOfPericenter 181.3
MeanAnomaly 359.982 # used for fineadjust (should be 0)
Epoch "1947 02 13 00:43" # theoretical time of perihel passage
}

RotationPeriod 2.5 # guess
Albedo 0.13 # iron
}



"Sikhote Alin Meteorite" "Sol"
{
Class "asteroid"
Mesh "asteroid.cms"
Texture "gstar.jpg"
Emissive true
Radius 0.002
Beginning "1947 02 11 23:42:27" 
Ending "1947 02 11 23:42:56" # impact (orig. 00:38 UT)
# couldn't get it better

EllipticalOrbit {
Period 3.1811546 # computed from dist
SemiMajorAxis 2.12724 # 2.163 is original value, doesn't hit earth
Eccentricity 0.536
Inclination 9.4
AscendingNode 323.203 # 322.5 is original value, doesn't hit earth
ArgOfPericenter 181.3
MeanAnomaly 359.982 # used for fineadjust (should be 0)
Epoch "1947 02 13 00:43" # theoretical time of perihel passage
}

RotationPeriod 2.5 # guess
Albedo 0.13 # iron
}

regards,
TERRIER

[Medusa]

I thought about this, too, but didn't try it yet... maybe it's also possible to add an "Atmosphere" to make the view more realistic? For pseudo-binary orbiting stars (emissive planets) it works quite good. Perhaps we should give it a try, a white atmosphere 1 or 2 meters "high"...?

~Medusa

[Medusa]

Just a note to drop in here:
the "Atmosphere" trick I mentioned above WORKS. See the links in my original post to view pictures, I updated the sites to Celestia screenshots now.

The "fireball" is not yet included in the dowload add-on. But note that the "shine" is a simulated 4 meter high "atmosphere" - just if you would like to play around a bit with it for yourself.

~Diane.