Scenario11

HST V3 Trajectory 11

Asymmetric NMC around an articulated inertially fixed target with low angle illumination, LEO, uncontrolled camera

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

Trajectory card & sample video

trajectory_11_card.png · HST_DatasetV3_11_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 an articulated inertially fixed target with low angle illumination, LEO, uncontrolled camera. Radial separation 0 m · along-track min -40 m · along-track max 20 m · initial phase 0 rad. Starts at 2025-02-18T06:39:00 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 · 22.4 MB

Configuration

Target orbit

Regime
LEO
NORAD ID
20580

Keplerian elements

Semi-major axis a (derived)
6874.7 km
Eccentricity e
0.0002439
Inclination i
28.4679°
RAAN Ω
134.6007°
Argument of perigee ω
187.5777°
Mean anomaly M
172.4780°

Mean motion & derived

Mean motion
15.23090817 rev/day
Orbital period
94.54 min
Mean altitude
496.5 km
// target two-line element set
1 20580U 90037B   25048.56565509  .00010641  00000-0  42986-3 0  9998
2 20580  28.4679 134.6007 0002439 187.5777 172.4780 15.23090817714416

Target spacecraft

Attitude mode
Triad (two-vector) pointing
Primary
BodyFront → Saturn
Secondary
BodyUp → Normal
Attitude hold
Controlled

Articulation

Solar-panel Sun tracking
not enabled
TDRS antenna tracking
enabled
ApertureDoor (frames 37–96)
-112° → 0°
ApertureDoor (frames 475–534)
0° → -112°
PV3_Antenna (frames 0–89)
0° → -90°
NV3_Antenna (frames 0–89)
0° → 90°

Camera & render

Behaviour
Attitude solved once and then held — target drifts through the field of view
Attitude mode
Triad (two-vector) pointing
Primary
BodyFront → Target
Secondary
BodyUp → Normal
Attitude hold
Uncontrolled
Target angle
oscillates 0–35°

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
-40 m
Max along-track offset
20 m
Initial phase
0 rad
Random seed
11

Timing

Start epoch (UTC)
2025-02-18T06:39:00.0000000Z
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
constant ≈ 165°
Spotlight
Auto
// 180° = Sun directly behind the camera (target fully lit)
// ~165° = low phase angle · ~95° = high phase angle