Re: Starlink Flare Hypothesis

From: Andreas Hornig via Seesat-l <>
Date: Mon, 20 Apr 2020 00:42:52 +0200
Hi Tony,

do you mean these fluctuation in brightness?

These were really well visible during the pass I experienced over Jena a
few hours ago. This peaking was also for all Starlink sats in the same
hemispherical region and moved a bit by time towards the alread set Sun.

Unfortuenately I had not setup my camera well enough for these flares. I
was there for checking something else.

(In AstroImageJ, I set the blue circle on the beginning and RA/DEC is above)

Best regards,


On Fri, Apr 17, 2020 at 7:01 PM Anthony Mallama via Seesat-l <> wrote:

> Alexandre Amorim and Brad Young have reported numerous bright flares of
> Starlink satellites during the past ten days. The celestial geometry of the
> brightest events, which range from -3 to -8 magnitude, are fairly
> consistent. The most striking aspect is that the azimuth of the satellite
> is approximately equal to that of the Sun in most cases.
> This geometry suggests that the flares are due to specular reflection of
> sunlight from the nadir-facing side of these flat-panel shaped satellites.
> The picture titled 'Antennas' at the SpaceX web site appears
> to show several such reflective areas on the nadir side.
> Tony Mallama
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Received on Sun Apr 19 2020 - 17:44:26 UTC

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