32 Million Photometric Observations Quantify Optical Interference Rates from Artificial Satellites
What Was Observed (Empirical Data)
Researchers analyzed 32 million photometric observations of artificial satellites, rocket bodies, and orbital debris, determining sky densities of 0.38×10⁻³, 0.76×10⁻³, and 1.10×10⁻³ objects per square degree brighter than magnitudes 6.0, 7.0, and 8.0, respectively. For objects brighter than magnitude 7.0, the empirical probability of appearing on a 10-second exposure across a 10-square-degree field of view is 15% averaged over all nighttime hours, with a 59% chance of an object being visible to the naked eye under dark sky conditions. Analysis of objects launched since the start of the mega-constellation era confirmed that active satellites account for the majority of bright detections.
The Reality Check (Anti-Hype Analysis)
Predictions that nearly every astronomical image will be contaminated rely on an unverified forward-looking scenario where operators successfully deploy one million satellites, rather than current orbital conditions. The 15% streak probability applies specifically to wide-field (10-square-degree) surveys and varies substantially with solar depression angle, meaning narrow-field instruments and deep-night observations experience markedly lower interference rates. Additionally, a 59% naked-eye detection probability measures the transient appearance of an object at some point across an entire night under pristine dark skies, not persistent or sky-filling obscuration of natural starlight.
PRIMARY SOURCE:
arXiv Astrophysics (astro-ph)