[amsat-bb] Re-entry predictions for BY70-1

Scott scott23192 at gmail.com
Mon Jan 30 00:35:29 UTC 2017

So, if you happen to be on a border between two grid squares & you make a 
satellite contact that becomes a meteor scatter contact, do you just sit 
back and watch your logging program explode?

-Scott,  K4KDR


-----Original Message----- 
From: Ken Alexander
Sent: Sunday, January 29, 2017 7:23 PM
To: amsat-bb at amsat.org
Subject: Re: [amsat-bb] Re-entry predictions for BY70-1

A unique meteor scatter opportunity!



On 2017-01-29 5:51 PM, Mac A. Cody wrote:
> Todd and Joe,
> Given that BY70-1 is a 2U cubesat measuring 10x10x20cm and weighing
> only a few kilograms (details here:
> https://amsat-uk.org/2016/12/27/by70-1-fm-transponder-satellite/),
> it will completely burn up upon reentry.  When and where it will
> burn up, of course, depends on the orbital dynamics, atmospheric
> conditions (the sun's radiation affects the height of the top of the
> atmosphere), and the satellite cross-section.  The eventual demise may
> be over one of the oceans or a cloudy region, with no one present or
> able to witness it.
> Since BY70-1 is reported to have 3-axis stabilization, we may be
> able to enjoy its use right up to its fiery end.  I have been trying
> to work BY70-1 as much as my other responsibilities will allow. I
> encourage all to do the same.
> 73,
> Mac / AE5PH
> On 01/29/2017 10:07 AM, Todd Deckard wrote:
>> Greetings Joe!
>> space-track.org lists the decay epoch as 2017-02-22 0:00:00 -- note this 
>> is not strictly the re-entry time but perhaps gives us an approximate 
>> window?
>> I do not understand the material very well.  It appears for large objects 
>> they will calculate a time-and-impact prediction as things become more 
>> certain but perhaps poor Bayi-Kepu-Weixing-1 may not rate as it doesn't 
>> pose a hazard.
>> I don't even know if it would be visible during re-entry given the speed?
>>> When will we have a closer idea of when it may re-enter?
>>> It would be neat to try to catch it on video.
>>> Joe WB9SBD 

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