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Central Texas
Astronomical Society



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14801 Farm to Market Road Rd 182, Clifton, TX 76634

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Science Imaging

Short Period Eclipsing Binary
Johnny Scarborough

Attached is a light curve of TYC 3807-759-1. This was created using my 10" Orion RC Truss telescope and ZWO Asi533mm camera. The period is listed as 5.4 hours. The light curve is about 6 hours, 1035 images. Each image is 5 sec. with a 5 sec. delay between each. More to come!


Johnny Scarborough

Jane48
What kind of variable is this star?



Sent from my Verizon, Samsung Galaxy smartphone


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Posted by: Johnny Scarborough on 3/19/2025 at 11:16 AM
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Attached is a light curve of TYC 3807-759-1. This was created using my 10" Orion RC Truss telescope and ZWO Asi533mm camera. The period is listed as 5.4 hours. The light curve is about 6 hours, 1035 images. Each image is 5 sec. with a 5 sec. delay between each. More to come!

Johnny Scarborough

Attachment(s):
File: 20250318_195042.jpg (2.3 MB) -- Address: https://images.clubexpress.com/901132/attach/4115063_0_20250318_195042.jpg



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Johnny Scarborough

It's an eclipsing binary. Two stars orbiting each other.

Primary and Secondary Eclipses:


The primary eclipse is the deeper dip that occurs when the brighter star is eclipsed.

 
The secondary eclipse is the shallower dip that occurs when the dimmer star is eclipsed. 

Thanks Johnny S


Jane48
Thanks. Very interesting work. -Paul




Jeffrey McClure

How big a scope does one need to contribute to this? My biggest is a 107mm refractor with a FL of 740mm.


Second question: will the necessary software run on an M1 Mac on OSX?

Johnny Scarborough
Your 107 should work. The stars vary in magnitude so there are targets for most apertures. 

AstroimageJ works with Linux, Windows and MAC OS. 

You would need a guiding system to maintain round stars, a stable mount that tracks well, at least a photometric V filter and a cooled camera. 

Of course all is available via remote use of PJMO!

Thanks for asking,
Johnny S 

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