urn:nasa:pds:dart_shapemodel:data_derived_dimorphos_model_v004:dimorphos_g_0972mm_spc_obj_0000n00000_v004
1.0
Global shape model of (65803) Didymos I (Dimorphos) generated by SPC.
dimorphos_g_0972mm_spc_obj_0000n00000_v004
1.20.0.0
Product_Observational
Barnouin, O.; Daly, T.; Ernst, C.; Espiritu, R.; Waller, D.
2023
The shape of (65803) Didymos I (Dimorphos) is obtained using stereophotoclinometry where stereo techniques with photoclinometry
is used to derive the tilt of an asteroid’s surface from DRACO images.
The model resolution is approximately 0.972m between vertices. The model has the format
v x1 y1 z1
v x2 y2 z2
v x3 y3 z3
(etc.)
f i1 j1 k1
f i2 j2 k2
(etc.)
where the letter 'v' denotes a vertex and the letter 'f' denotes a triangular facet.
A comment with # is provided at the beginning of the file providing
More details about the shape. See DART Shape Model SIS for more
details.
2023-09-28
1.0
Initial release of the DART Shapemodel Bundle.
Science
Derived
Small Bodies
Shape Model
Double Asteroid Redirection Test
Mission
urn:nasa:pds:context:investigation:mission.double_asteroid_redirection_test
data_to_investigation
DART
Host
Double Asteroid Redirection Test (DART) Spacecraft
urn:nasa:pds:context:instrument_host:spacecraft.dart
is_instrument_host
DRACO
Instrument
Didymos Reconnaissance and Asteroid Camera for OpNav (DRACO).
A narrow field of view imager on NASA’s Double Asteroid Redirection Test (DART) spacecraft
urn:nasa:pds:context:instrument:dart.draco
is_instrument
(65803) Didymos I (Dimorphos)
Satellite
urn:nasa:pds:context:target:satellite.65803_didymos.dimorphos
data_to_target
dimorphos_g_0972mm_spc_obj_0000n00000_v004.obj
Global shape model of (65803) Didymos I (Dimorphos) generated by SPC
0
3410
UTF-8 Text
OBJ header. Contains metadata about shape model.
vertex_table
3410
98306
The VERTEX_TABLE is the first part, describing the positions of the vertices of the
shape model. The floating point numbers x1 y1 z1 are the coordinates of vertex 1,
and so on (vertices are implicitly numbered beginning with 1). The origin is the
center of mass, and the axes are the principle axes of the shape model. The units
are kilometers.
Line-Feed
4
0
65
Vertex_Flag
1
1
ASCII_String
1
A 'v', indicating this record contains the coordinates of a vertex
X_Coordinate
2
4
ASCII_Real
19
X coordinate of the vertex
Y_Coordinate
3
25
ASCII_Real
19
Y coordinate of the vertex
Z_Coordinate
4
46
ASCII_Real
19
Z coordinate of the vertex
facet_table
6393300
196608
The FACET_TABLE is the second part of the shape model file providing the linking of
vertices into facets. The integers i1 j1 k1 are the indices of the 3 vertices that
form triangular facet 1, and so on.
Line-Feed
4
0
41
Facet_Flag
1
1
ASCII_String
1
An 'f', indicating this record contains the indices of three vertices defining a single, triangular facet.
Vertex_1
2
12
ASCII_Integer
9
Index of the first vertex
Vertex_2
3
22
ASCII_Integer
9
Index of the second vertex
Vertex_3
4
32
ASCII_Integer
9
Index of the third vertex