Moving object detected at 30 Apr 2021 - 02:21
Object classification
- Satellite
- Satellite ID: LANDSAT 4 (Diagram of path)
- Aircraft call sign: Unidentified
- Aircraft hex ident: Unidentified
Observation type
An object moving across the sky
Observatory
Time
Start
30 Apr 2021 - 02:21:38.78
End
30 Apr 2021 - 02:21:41.86
Duration
3.1 sec
Display options
Other files associated with this event
All trigger pixels
A map of all the pixels which triggered the camera's motion sensor over the duration of the object's appearance.
Difference frame
This frame indicates why the camera thought this object was interesting. It shows the difference between the video frame where the object appeared and the one before. White areas have brightened; dark areas have darkened.
Excluded pixels
This is a map of pixels within the frame which were being ignored owing to too much past variability. They may be foreground objects which are often illuminated by car headlights, for example. Only white pixels are ignored; different shades of grey indicate how much each pixel has varied in the past.
Trigger map
This map indicates why the camera thought this object was interesting. Grey spots indicate areas which had recently brightened by an unusual amount. White spots indicate areas large enough to trigger the camera's motion sensor.
Maximum brightness
This image shows the maximum brightness of each part of the image over the course of the object's appearance. This is usually the image that shows the object most clearly.
Previous frame
This image shows what the sky looked like immediately before the object appeared.
Initial appearance
This image shows the first video frame in which the moving object was detected.
Video
Video of object
This is a video of the object which triggered the camera
Status information about this detection
| Property | Value |
| Peak brightness of object | 1127.00 |
| Time-integrated brightness of object | 3586.00 |
| Number of motion sensor detections | 5.00 |
| Detection significance | 99.76 |
| Duration of object's appearance (sec) | 3.08 |
| Height of frame | 576.00 |
| Path of object | [[312,123,1619749298.787],[311,123,1619749298.865],[292,132,1619749301.862]] |
| Video duration | 9.07 |
| Video frames/second | 25.04 |
| Video start time | 1619749296.79 |
| Width of frame | 720.00 |
| Identification: Object type | Satellite |
| Frame drop incidents | [] |
| Aircraft: call sign | Unidentified |
| Aircraft: Hex identifier | Unidentified |
| Aircraft: Ephemeris clock offset (sec) | 0.00 |
| Aircraft: Angular mismatch (deg) | 0.00 |
| Aircraft: Mean distance (km) | 0.00 |
| Aircraft: Mean altitude (km) | 0.00 |
| Aircraft: Path | [null, null] |
| Aircraft: Track length (deg) | 2.52 |
| plane:operator | 0.00 |
| plane:model | 0.00 |
| plane:manufacturer | 0.00 |
| Satellite: Name | LANDSAT 4 |
| Satellite: Number | 13367.00 |
| Satellite: Ephemeris clock offset (sec) | -1.81 |
| Satellite: Angular mismatch (deg) | 0.56 |
| Satellite: Track length (deg) | 2.52 |
| Satellite: Path (RA, Dec) | [[-8.015,41.403],[-8.012,41.292],[-8.032,38.896]] |