https://github.com/steq28/ml-star-classification

https://github.com/steq28/ml-star-classification

Last synced: 12 days ago
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• Host: GitHub
• URL: https://github.com/steq28/ml-star-classification
• Owner: steq28
• License: mit
• Created: 2023-12-12T16:27:38.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2024-02-25T17:32:54.000Z (12 months ago)
• Last Synced: 2024-02-25T21:10:49.021Z (12 months ago)
• Language: Jupyter Notebook
• Size: 23.9 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Machine Learning Star Classification

Dataset used: https://www.kaggle.com/datasets/fedesoriano/stellar-classification-dataset-sdss17/data

## Dataset Structure

The data consists of 100,000 observations of space taken by the SDSS (Sloan Digital Sky Survey). Every observation is described by 17 feature columns and 1 class column which identifies it to be either a **star**, **galaxy** or **quasar**.

- **obj_ID** = Object Identifier, the unique value that identifies the object in the image catalog used by - the CAS

- **alpha** = Right Ascension angle (at J2000 epoch)

- **delta** = Declination angle (at J2000 epoch)

- **u** = Ultraviolet filter in the photometric system

- **g** = Green filter in the photometric system

- **r** = Red filter in the photometric system

- **i** = Near Infrared filter in the photometric system

- **z** = Infrared filter in the photometric system

- **run_ID** = Run Number used to identify the specific scan

- **rereun_ID** = Rerun Number to specify how the image was processed

- **cam_col** = Camera column to identify the scanline within the run

- **field_ID** = Field number to identify each field

- **spec_obj_ID** = Unique ID used for optical spectroscopic objects (this means that 2 different observations with the same spec_obj_ID must share the output class)

- **class** = object class (galaxy, star or quasar object)

- **redshift** = redshift value based on the increase in wavelength

- **plate** = plate ID, identifies each plate in SDSS

- **MJD** = Modified Julian Date, used to indicate when a given piece of SDSS data was taken

- **fiber_ID** = fiber ID that identifies the fiber that pointed the light at the focal plane in each observation