951 Gaspra scaled one in 200 thousand

This model was rendered using MATLAB R2016a on the ICQ model of the PSI made by Peter Thomas from the data of the Galileo mission. It is the first model I have made using a new kind of interpolation. Instead of the usual azimuthal vs elevation matrix (spherical coordinates), I used a coordinate system transformation into the equivalent of a disassembled equiradial tetrahedron. This new interpolation makes the distance between two neighbour points in the interpolation matrix to be nearly the same distance in any latitude and longitude. In the azimuthal-elevation matrix, on the proximity to the poles, two neighbour points of the same elevation are closer to each other than two of them near the equator. The file's names explained: name_1_x_10_y.stl is 1 : x * 10y. So _1_6_10_7 is 1:600000000 or one in 60 million.

951 Gaspra

Gaspra is a small asteroid, member of the Flora family, imaged by the Galileo probe in its way to Jupiter. This family, as well as all asteroid families, is the result of ejected material from a colission of the main member of the family, 8 Flora, with a smaller object. This family is thought to be the source of the asteroid (or asteroids) that impacted the Earth 65 mya, leaving the Chicxulub crater and triggering the K/T event (in which the non-avian dinosaurs became extincs), and the impactor of the Tycho crater in the Moon, 108 mya; because of the close orbits of the family members, and the recent of its creation event. There could be other origin for those recent impactors, like comets or NEAs. Gaspra is unusual among close imaged asteroids in being relatively clear of big craters, probably because of the young family origin. Another unusual characteristic is the presence and abundance of regoliths, a "soil" of astronomical objects. Small objects tend to easily lose this substrate due to low of their mass and the effect of the sun erosion.
Type: Asteroid. Flora family.
Orbit: Sun. Main Asteroid Belt.
Orbital period: 3.29 yr.
Composition: Silicate rock. S type
Density: 2.7 g/cm3.
Dimensions: 18.2 km × 10.5 km × 8.9 km
Model scale: 1:2x105 (9cm)

References
"https://sbn.psi.edu/pds/resource/oshape.html" Surf to STL function for MATLAB

Other astronomical objects



Object


Scale [1:x]
K = 103 (thousand)M = 106 (million)G = 109 (billion)


Image




Inner Solar System



Mercury
20M, 60M,
120M



Venus
60M,
120M,
250M



Earth
60M,
120M,
250M



Luna
10M, 20M,
60M



Mars
20M, 60M,
120M



Phobos and Deimos
200K,
500K




Artificial



Salyut 7
40, 48, 80, 160




Near Earth Asteroids



Moshup and Squannit
8K,
20K,
40K



Ra-Shalom
20K,
40K



Castalia
8K,
20K,
40K



Bacchus
8K,
20K



Bennu
3K,
8K



Ryugu
3K, 8K,
20K



Geographos
40K,
80K



Phaethon
40K,
80K



Itokawa
3K,
8K



Eros
80K, 200K,
500K



Nereus
3K,
8K



Mithra
20K,
40K



Golevka
8K



Toutatis
40K,
80K




Main Asteroid Belt




Gaspra
200K



Annefrank
40K,
80K



Braille
20K,
40K



Vesta
2M, 4M,
10M



Šteins
40K,
80K,
200K



Iris
2M,
4M



Hebe
1M,
2M,
4M



Lutetia
500K, 1M,
2M



Julia
1M,
2M,
4M



Mathilde
500K,
1M



Juno
2M,
4M



Ceres
4M,
10M



Pallas
4M,
10M

-