Re: Brightness of Starlink Generation 1 Satellites

Hi Jay,

great that the measurement itself can be ruled out.

About the comparison of the brightness to next stars, I read that when I
followed your referenced source[0]. For me, as an untrained person, that is
difficult to do by eye because I do not trust my brain and eyesight when I
do that live. I think I would produce too many outliers :).

Do you think such photos as in [1] would help? I would use astrometry.net
for the stars that give me the names and thus the magnitudes. And Also a
simple tool to measure the brightness at each pixel, so that I can compare
that to the satellites within the frame.
Would you recommend such a way for your campaigns? It would help me a lot
and would enable me to help when the bigger generation 2 starlinks will fly.

The original frame in [1] is from Nick James by the way and I used it for
explaining how to find satellites of the SpaceX Transporter 2 mission in
the IAC2021 Interactive Presentation [2].

[0] Mallama, 2022a. The method of visual satellite photometry.
https://arxiv.org/abs/2208.07834.
[1] https://photos.app.goo.gl/t6DgrgPyNfQ6dcuPA (I can also send it to, I
just did spare the mailing list to receive a bigger file)
[2]
https://iac2021-iaf.ipostersessions.com/Default.aspx?s=DF-0B-09-66-02-75-6C-82-8F-1B-8F-EA-0F-A2-E3-F9

Best regards,


Andreas

On Fri, Nov 4, 2022 at 6:13 AM JAY RESPLER <JRespler_at_superlink.net> wrote:

> Hello Andreas.
> I measure magnitude the same way for all observations, so that is not a
> factor.
> I compare satellite to nearby stars.
>
> -
> Jay Respler
> Monroe Township, New Jersey
>
> On 11/1/22 04:20:09 PM, Andreas Hornig via Seesat-l wrote:
>
> Hey Anthony and Jay,
>
> really a cool paper, thanks for sharing! :)
>
> Do you already have an idea what could be the reason why at 0 and 180
> degrees phase angle, the visor measurements seem to be
> apparently slightly brighter again?
>
> Could it be due to the measurement method itself, ...
> Andreas
>
> ------------------------------
>
>
>
> On Tue, Nov 1, 2022 at 1:45 PM Anthony Mallama via Seesat-l <seesat-l_at_satobs.org> wrote:
>
>
> Jay Respler and I have co-authored an article that quantifies the visual
> brightness of all three models of Starlink satellites. The characteristic
> magnitudes for the Original, VisorSat and Post-VisorSat designs are 4.7,
> 6.2 and 5.5, respectively. This analysis draws upon the thousands of
> Starlnk
> magnitudes that Jay has reported here on SeeSat. The paper can be
> downloaded from https://arxiv.org/abs/2210.17268.
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