Re: Starlink coating

From: Michael R Thompson via Seesat-l <seesat-l_at_satobs.org>
Date: Sun, 19 Jan 2020 21:25:35 +0000
For what it's worth, I've been told that the attitude during orbit raising doesn't really yield a lower magnitude, and the benefit won't be seen until it's in its operational orbit.  That could just be spin, I've been personally skeptical of the dark coating all along, but we'll see.

Thanks,
Michael
________________________________
From: Seesat-l <seesat-l-bounces+thomp376=purdue.edu_at_satobs.org> on behalf of PAUL MALEY via Seesat-l <seesat-l_at_satobs.org>
Sent: Sunday, January 19, 2020 5:45 AM
To: Thierry Legault <legault_at_club-internet.fr>; SEESAT <seesat-l_at_satobs.org>
Subject: Re: Starlink coating

From the observations I have made so far, I do not see any evidence of a Starlink satellite that appears to have any significantly lower reflectivity than all of the others. Maybe this remains to be seen if Starlink engineers have a time ordered way to make this happen for this launch.  All of the spacecraft seem to be as bright as previous launches up to this moment. If there is a "dark" satellite, lets keep looking to see if it shows up.

Paul

Paul D. Maley
https://pauldmaley.com
email: pdmaley_at_yahoo.com

    On Saturday, January 18, 2020, 4:49:57 PM MST, Thierry Legault via Seesat-l <seesat-l_at_satobs.org> wrote:

 hello, it the number #1130 (also named Starlink U) confirmed for the
"dark" one?

I took a video today (under processing) of the series T-N-AR-Q-P-U-B
and at first sight, the U does not look dimmer than the others (I'
not really surprised anyway... :-()

They are so bright! They passed through Aries and were clearly
brighter than alpha Aries (mag 2). The chain could be fascinating if
it was not frightening for the future of deep-sky astrophotography...

Thanks

Regards

At 23:46 07/01/2020, Thierry Legault via Seesat-l wrote:
>hello, thank you for the info!
>
>I took a video of a passage of Starlink-1 last week, their
>brightnesses seem to be relatively uniform:
>https://youtu.be/4tEbxVKxGKo
>
>I will try to take another one of Starlink-2 soon (when the weather
>is fine...), to see how the #1130 is different
>
>Regards
>
>
>At 15:04 07/01/2020, C. Bassa via Seesat-l wrote:
>>On Tue, Jan 7, 2020 at 2:57 PM Leo Barhorst via Seesat-l
>><seesat-l_at_satobs.org> wrote:
>> > There is only 1 satellitte with the coating according to Space-X.
>> > So we will have to see if one of the sats is dimmer than the others.
>>
>>Apparently SpaceX reports, through TS Kelso, that Starlink-1130 is the
>>satellite which has the coating applied.
>>https://twitter.com/TSKelso/status/1214375202865451009?s=20
>>
>>Celestrak has supplemental TLEs which include Starlink-1130 (temporary
>>ID 71130): https://celestrak.com/NORAD/elements/supplemental/starlink.txt
>>
>>Regards,
>>    Cees
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>
>Thierry Legault
>www.astrophoto.fr<http://www.astrophoto.fr>
>
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>Seesat-l mailing list
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Thierry Legault
www.astrophoto.fr<http://www.astrophoto.fr>

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Received on Sun Jan 19 2020 - 21:25:35 UTC

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