Re: Starlink coating

From: Thierry Legault via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 20 Jan 2020 00:00:23 +0100
Hi, here is the video: https://youtu.be/6E_qyAyvugA

I can't see any difference between the "darksat" and the others...

Thierry
At 22:25 19/01/2020, Michael R Thompson via Seesat-l wrote:
>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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>
>Thierry Legault
>www.astrophoto.fr<http://www.astrophoto.fr>
>
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Thierry Legault
www.astrophoto.fr

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Received on Sun Jan 19 2020 - 17:02:24 UTC

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