Re: New bright satellite

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 25 Jul 2017 12:36:39 +0200
Op 25-7-2017 om 10:56 schreef Leo Barhorst:
> On Jul 11 I wrote:
> The sat wil rotate in all 3 directions and by reflecting the sunlight it could
> reach
> mag -10, much brighetr than ISS (mag -4) or the Iridium-1's (mag -8).
> 
> See the article on Spaceflight101.com with 2 video's and photo's.
> 
>>>
> This is unlike the Iridiums-1 that had a stable orientation and reflect the
> sunlight from the antennae panels in a small path over the earth.
> 
> As MAYAK would be rotating in all 3 directions I think the reflections will
> spread out over the earthsurface and one must be lucky to see them.
> 
> The video on Spaceflight101.com suggest otherwise. But only real observations
> could clarify that.



I have seen another source (that I can't find this fast) mentioning that Mayak
would actually be 3-axis stabilized for the first 3 or 4 weeks after launch,
i.e. like an Iridium. After this, they will let it tumble (but it will decay fast).

It is a pitty that the people behind Mayak aren't more forthcoming with
information about their spacecraft operations, certainly giving the media hype
they created about "the brightest object in the sky". Their website gives very
little useful information about the operational phase of the satellite.

- Marco

PS: ah, found a source (not the one I had seen earlier) mentioning the 4 week
stable orientation mode:
http://www.skyandtelescope.com/astronomy-news/bright-moon-new-satellite-mayak-light-sky/


-----
Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
e-mail: sattrackcam_at_langbroek.org

Cospar 4353 (Leiden):     52.15412 N, 4.49081 E (WGS84), +0 m ASL
Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL
Station (b)log: http://sattrackcam.blogspot.com
Twitter: _at_Marco_Langbroek
-----
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Received on Tue Jul 25 2017 - 05:37:22 UTC

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