Information about a survey the FAS is organising about low Earth orbit satellites.
Chris H
Subject: | [Allfassocs] FAS Survey Into the Growing Problem of Satellite Megaconstellations |
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Date: | Sat, 26 Aug 2023 00:01:56 +0100 |
From: | Dr Paul A Daniels (FAS) |
Reply-To: | Dr Paul A Daniels (FAS) |
Organisation: | Federation of Astronomical Societies |
To: | All FAS Members |
You may be aware of
the growing threat to amateur astronomy posed by the surge
in the number of satellites placed in low Earth orbit (LEO).
Most of the satellites should be fainter than naked
eye brightness but they still pose a problem to telescopic
observations, astrophotography, spectroscopy and radio
astronomy.
According to the Union of Concerned Scientists’
satellite database, up to the end of 2022 there were
6,718 functioning satellites in Earth orbit of which 5,938
were in LEO and over 80% of those were launched in just the
past 3 years. There are proposals for an estimated 250,000
satellites to be launched into LEO over the next decade.
This represents about a 40-fold increase over the current
number.
Jonathan McDowell
maintains a list of planned constellations on Jonathan's Space Pages
where, up to 22-Aug-2023, he shows a maximum total of
543,811 LEO satellites from 18 different planned
constellations. He doesn’t give a timescale but, if all are
launched as planned, this would eventually represent a more
than 90-fold increase over the current number!
The FAS is organising
a survey to investigate the effect that these satellites
have had on amateur astronomy observations. The survey will
run until midnight on 22nd September 2023 after
which the results will be collated and analysed and
presented at IAU Symposium 385 Astronomy and Satellite
Constellations: Pathways Forward (2nd‑6th October 2023,
La Palma, Canary Islands, Spain). The recommendations from
that symposium will be used to advise the international
bodies that make policy on the operation of satellites and
the sustainable use of space (particularly LEO).
This survey is open
to all. Whether or not the
growth in the number of satellites has affected you, the FAS
urges your members to take part in the survey. Can I ask
that you please pass this on to them and ask them to take
part – the survey should only take about 5 minutes to
complete.
This is an
opportunity for your members’ contributions to make a
positive difference to the future of astronomy!
If any of your
members have any images that demonstrate the problem of
satellite intrusion that you’d be willing to share
(credited) then please ask them to send them to me at fas@PROTECTED.
Best wishes
Paul
Dr Paul A Daniels,
FRAS
President,
Federation of Astronomical Societies
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Chris Holt, Secretary, Abingdon Astronomical Society Date: