Scenario13

HST V3 Trajectory 13

Asymmetric NMC around a rigid body inertially fixed target with low angle illumination, LEO

Natural-motion circumnavigation (NMC)LEO1000 frames6 s/frame90° FoVillum ~165°rigid bodystereo

Trajectory card & sample video

trajectory_13_card.png · HST_DatasetV3_13_color.mp4
QuaternionRelative attitude of the target in the camera frame, per frame.
Target translationTarget position in the camera frame. tz is the range on the left axis (m); tx/ty use the right axis.
Optical-axis angleAngle from the chaser body front axis to the Sun, the Earth centre and the target — the annotation’s SunToCameraAngle, EarthToCameraAngle and TargetToCameraAngle. A flat 0° target trace means the chaser is pointed at the target.
Scene / illuminationBands along the bottom: eclipse or daylight, plus when the Earth and the Sun are inside the field of view.
TrajectoryAsymmetric NMC around a rigid body inertially fixed target with low angle illumination, LEO. Radial separation 0 m · along-track min -20 m · along-track max 40 m · initial phase 0 rad. Starts at 2025-01-04T23:22:00 UTC.
PlaybackCentre camera, colour post-process, every rendered frame in order — 1000 frames at 30 fps = 33.3 s · 1024×1024 · H.264 · no audio · 23.3 MB

Configuration

Target orbit

Regime
LEO
NORAD ID
20580

Keplerian elements

Semi-major axis a (derived)
6877.3 km
Eccentricity e
0.0002788
Inclination i
28.4687°
RAAN Ω
69.7258°
Argument of perigee ω
93.6067°
Mean anomaly M
266.4846°

Mean motion & derived

Mean motion
15.22221776 rev/day
Orbital period
94.6 min
Mean altitude
499.1 km
// target two-line element set
1 20580U 90037B   25004.84849472  .00012167  00000-0  50557-3 0  9993
2 20580  28.4687  69.7258 0002788  93.6067 266.4846 15.22221776707741

Target spacecraft

Attitude mode
Inertially fixed
Frame
J2000
Quaternion (as configured)
w 0.807689471x-0.133898651y-0.201077723z-0.537844419
Attitude hold
Controlled

Articulation

Solar-panel Sun tracking
not enabled
TDRS antenna tracking
not enabled
Appendage motion
none — rigid body

Camera & render

Behaviour
Continuous target tracking
Attitude mode
Triad (two-vector) pointing
Primary
BodyFront → Target
Secondary
BodyUp → Normal
Attitude hold
Controlled
Target angle
constant 0°

Optics & render

Horizontal field of view
90° (default)
fx = fy (derived)
512.00
cx = cy
512
Cameras
Center · Right
Resolution
1024×1024 px
Pixel samples
32
Camera axes
−Z forward · +X right · +Y down

Relative trajectory

Generator
Natural-motion circumnavigation (NMC)
Step name
NaturalMotionCircnavOrbitGenerator
Max radial separation
0 m
Min along-track offset
-20 m
Max along-track offset
40 m
Initial phase
0 rad
Random seed
13

Timing

Start epoch (UTC)
2025-01-04T23:22:00.0000000Z
Frames
1000
Time step
6 s
Duration
6000 s
Duration (clock)
1 h 40 min 0 s
Orbits covered (derived)
1.06

Illumination

Class
~165°
Sun optical-axis angle
128° – 175°
Spotlight
Auto
// 180° = Sun directly behind the camera (target fully lit)
// ~165° = low phase angle · ~95° = high phase angle