Eclipsing binary star TY UMa (Remco Kemperman)

Eclipsing binary star TY UMa

I wanted to try out some photometry on a variable star. And I think it worked.

TY UMa (in ursa major) is an eclipsing binary star with 2 stars of almost the same brightness that orbit each other every 8.5 hours. So there is a dip every 4.25 hours. I can roughly see that pattern in my graph 😁

Taken on 24-04-2021 and 25-04-2021. The time in the graph is corrected to UTC.

The difference in brightness (V-C) is the difference between the measured star and the average brightness of 3 known non-variable stars in the frame. So it is a comparatieve value that measures the dip.

According to Wikipedia the brightnessof this binary star dips by 0.64 and 0.66 magnitudes. My measurement is approximately 0.5 magnitudes.

telescope: skywatcher 150 / 750PDS on HEQ5 mount

camera: QHY294M (no filters)

525 x 40 seconds, gain 0, offset 6. Binning 2x2 to get more well depth

calibration and registration of the individual frames in PixInsight

The program you see here to create the graph is Muniwin. Fortunatelly this program is fairly easy to understand and it costs 0 euro's😉.

Original
Final
B

B

Description: Same data, better graph. I have got a better understanding of Muniwin now to make a proper graph frame the data. Note to self: Muniwin does not work with 32 bit frames ;) only 16 bit.

Uploaded: ...

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Status	Basic failed
Started	...
Astrometry.net job	4463302
PixInsight job	n/a
PixInsight queue size	n/a
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