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Cake day: June 9th, 2023

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  • Inzwischen gibt es neue Daten zu den neuen Starlink v2-mini Satelliten, die mit Reflektorfolie auf +7 mag gekommen sind, also ungefähr so dunkel wie von der Fachkonferenz gefordert.

    Was in dem Paper von der Konferenz besonders krass ist sind die Plots die die Abhängigkeit von der Orbit-Höhe zeigen. Starlink bei 550 km ist wesentlich weniger problematisch wie OneWeb bei 1200 km. Was Kessler-Syndrom angeht ist der niedrigere Orbit von Starlink auch ca. Faktor 100 mal weniger problematisch.


  • SpaceX wants new regulations regarding satellite brightness.

    Their own satellites (at least the second generation ones) fulfill the requirements set by the astronomers at the Rubin Observatory, +7 mag (10x darker than the original ones). Meanwhile the satellites of the competitors OneWeb and Amazon can’t fulfill them without major design changes, because the altitude the satellites orbit at makes a significant difference.

    If the recommendations of the Rubin Observatory report were turned into regulations now, Starlink would barely be affected (they’d just have to stop the gen1 sat production a little early) while the competition would be set back several years.