Observation by Graeme Coates: XY LMi Primary minimum

Uploaded by

Graeme Coates

Observer

Graeme Coates

Observed

2020 Mar 02 - 21:24

Uploaded

2020 Mar 03 - 08:55

Objects

Lightcurve
Variable star

Equipment

Home built 350mm Newtonian (f4.6)
SBIG ST2000XM
Astrodon V Filter
Losmandy Titan

Exposure

15sec exposures

Location

Standlake, W Oxon

Target name

XY LMi

Title

XY LMi Primary minimum

About this image

Data for determining ToM of the eclipsing binary XY LMi which is an EW type eclipsing binary with period 10.48535 h.

The time of minimum appears to be -0.0542d different to the predicted minimum from the Lichtenknecker Database value - this star has a last observed minimum in that database on 11/03/2017 where the ToM was -0.0395d different to the predicted value.

Files associated with this observation

Annotation 2020-03-03 012444.png (20.4 kB)

Like this image

Graham Winstanley, Dr Andrew Smith, Jeremy Shears, Dave Smith, James Screech, Ray Emery, David Basey, Dr Paul Leyland, Andy Wilson, Andrew Dumbleton, Peter Carson

Comments

Graeme Coates, 2020 Mar 04 - 09:19 UTC

https://iopscience.iop.org/article/10.1088/0004-6256/141/5/151 details this star - and has a quadratic formula for the light curve. The timing here is within 5 minutes of the predicted time using that formula.

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