A simulation of the Yale bright star catalog. Stars are position according to their galactic longitude and latitude.

Used to capture simi-realistic data of the night sky for training a satellite star tracker

The Bright Star Catalogue (BSC) is widely used as a source of basic astronomical and astrophysical data for stars brighter than magnitude 6.5.

The BSC contains 9110 objects, of which 9096 are stars (14 objects catalogued in the original compilation of 1908 are novae or extragalactic objects that have been retained to preserve the numbering, but most of their data are omitted)

The 14 non-star objects in the database were removed The 4 stars with negative Vmag were given a value of 0.01

Original dataset: Link

The ./data directory contains two .csv files: star_pos.csv and camera_pos.csv and a calculations excel file.

• The star position file contains the x,y,z vectors for the 9096 star objects. These vectors are calculated based on the galactic longitudes and latitudes from the dataset. They can be recalculated using the calculations file.
• The camera position file contains the delta lambda and phi angles the camera should shift between each capture point. It is not the cords themselves.
• The calculation file allows you to recalculate these values if you use a different dataset or want to change the number of captures.

The project can be downloaded as a zip and imported through the Godot Engin project manager.

Hold the Right Mouse button to translate the camera orientation

Press: F2 to take a screenshot. Screenshots will be saved with their galactic coordinates that the image was captured at with the format: [Lat (phi),Lon (lambda)]

Press: F3 will toggle movement with WSAD

Press: F4 to cycle through the sky overlays. There is a Celestial Grid and Constellation Figures overlay in addition to the blank background.

Press: F5 to begin the capturing the scene from the given camera positions

Press: F6 to stop the capture

When you begin the capture scan a script will: 1. Add the lambda and phi values from the row in the csv to the camera rotation 2. Take a screenshot 3. Repeat

Screenshots can be found in C:\Users\[username]\AppData\Roaming\Godot\app_userdata\[project name]\screenshots

The extract_labels notebook can loop through a directory of images, extract the location data from the name and construct a label csv.