Scenario31

HST V3 Trajectory 31

Cross-track pass around a rigid body retrograde-pointing target, LEO

Cross-track passLEO1000 frames5.67267552503404 s/frame90° FoVrigid bodystereo

Trajectory card & sample video

trajectory_31_card.png · HST_DatasetV3_31_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.
TrajectoryCross-track pass around a rigid body retrograde-pointing target, LEO. Cross-track separation 26.825 m · along-track offset 25.28 m · direction angle 3.17214 rad. Starts at 2025-02-28T01:19:00 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 · 16.4 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
Retrograde (anti-velocity) pointing
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
Cross-track pass
Step name
CrossTrackOrbitGenerator
Max cross-track separation
26.825 m
Along-track offset
25.28 m
Direction angle
3.1721359154996938 rad
Random seed
31

Timing

Start epoch (UTC)
2025-02-28T01:19:00.0000000Z
Frames
1000
Time step
5.67267552503404 s
Duration
5672.68 s
Duration (clock)
1 h 34 min 33 s
Orbits covered (derived)
1.00

Illumination

Class
sweeps through the run
Sun optical-axis angle
10° – 170°
Spotlight
Auto
// 180° = Sun directly behind the camera (target fully lit)
// ~165° = low phase angle · ~95° = high phase angle