Scenario04

HST V3 Trajectory 04

NMC around a rigid body tumbling target (139 s/turn about Z) with high angle illumination, LEO

Natural-motion circumnavigation (NMC)LEO1000 frames6 s/frame90° FoVillum ~95°rigid bodystereo

Trajectory card & sample video

trajectory_04_card.png · HST_DatasetV3_04_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.
TrajectoryNMC around a rigid body tumbling target (139 s/turn about Z) with high angle illumination, LEO. Radial separation 20 m · along-track min 0 m · along-track max 0 m · initial phase 0 rad. Starts at 2025-04-29T06:20:00 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 · 17.8 MB

Configuration

Target orbit

Regime
LEO
NORAD ID
20580

Keplerian elements

Semi-major axis a (derived)
6869.8 km
Eccentricity e
0.0001952
Inclination i
28.4697°
RAAN Ω
18.8626°
Argument of perigee ω
270.3861°
Mean anomaly M
89.6509°

Mean motion & derived

Mean motion
15.24721539 rev/day
Orbital period
94.44 min
Mean altitude
491.6 km
// target two-line element set
1 20580U 90037B   25118.90038554  .00010015  00000-0  38476-3 0  9993
2 20580  28.4697  18.8626 0001952 270.3861  89.6509 15.24721539725154

Target spacecraft

Attitude mode
Tumbling
Rotation axis (body)
[0,0,1]
Rate
0.0452 rad/s
Period
139.01 s/turn
Initial body orientation
w 0.8304228510519102x-0.134830876364806y 0.5368682758443308z-0.06317418477076701
Initial phase
0 rad
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
20 m
Min along-track offset
0 m
Max along-track offset
0 m
Initial phase
0 rad
Random seed
4

Timing

Start epoch (UTC)
2025-04-29T06:20:00.0000000Z
Frames
1000
Time step
6 s
Duration
6000 s
Duration (clock)
1 h 40 min 0 s
Orbits covered (derived)
1.06

Illumination

Class
~95°
Sun optical-axis angle
75° – 115°
Spotlight
Auto
// 180° = Sun directly behind the camera (target fully lit)
// ~165° = low phase angle · ~95° = high phase angle