SDSS Photometric Redshift

Redshift Predictor

Predict the cosmological redshift of astronomical objects using SDSS photometric band magnitudes via Multiple Linear Regression.

Step 01 — Object Classification

Step 02 — SDSS Photometric Bands (magnitude)

10 – 30 per band

u band3551 Å 10 – 30

g band4686 Å 10 – 30

r band6165 Å 10 – 30

i band7481 Å 10 – 30

z band8931 Å 10 – 30

Predicted Redshift (z)

—

dimensionless · cosmological redshift

95% Prediction Interval ± 1.96 × RMSE (approx.)

Lower

—

— Predicted z —

Upper

—

Width: —

Class

—

Model R²

—

RMSE

—

Model Equation

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Model Performance Summary

🌌 GALAXY

R² = 0.7353 · Strong
RMSE = 0.1354
MAE = 0.0834
Bands: u g r i z

⚡ QSO

R² = 0.1436 · Weak
RMSE = 0.8522
MAE = 0.6098
Bands: u g r i z

⭐ STAR

R² = 0.0125 · N/A
z ≈ 0 (no cosmological
redshift for stars)
Predict: 0.000000