A newly revealed bow shock surrounds LS Pegasi, a well-studied cataclysmic variable (CV) star in the constellation Pegasus. This reddish arc of emission was discovered through deep imaging and analysis of archival H-alpha and OIII data, confirming early suspicions from wide-field sky surveys. The emission structure seen here is a bow shock — a shell of material shaped by the motion of the star through the interstellar medium.

LS Pegasi has been known as a variable star since 1935, but it wasn’t until 1988 that it was classified as a CV, a system where a white dwarf accretes matter from a companion. In August 2020, amateur astronomer Dana Patchick detected subtle nebulosity around LS Pegasi using VTSS and SHASSA data, leading to targeted observations and the confirmation of this shock feature. The discovery contributes to a growing list of CVs with extended emission structures, suggesting mass-loss events or wind interactions that persist on large scales.

Image Description and Details : There are a lot of variable stars in the Pleiades cluster. About 60 were identified in this view using the AAVSO star charts.
4 of those showed clear variability in my recordings of 9-1-2022


NSV 1300. which is of type BY Draconis variables. These are rotating variables, usually type K or M, so orange/red stars. What you see here are starspots (sunspots on a star) spinning in and out of view. It revolves in 4.5 hours and you see almost 2 laps.


V1188, is an eclipsing binary star with a period of 13.88 hours. It varies between 12.3 and 11.85.

YZ Tau also shows variability. This is an RR Lyrae type variable. with a period of 9 hours. These are pulsating stars that shrink and grow periodically.
Here you can already see a contraction (getting hotter) and expansion (getting colder) of the star.


OU Tau is also a BY type star, a rotating star with a stellar spot on it. It rotates in 9.5 hours. In this case you can already see 1 cautious dip when the starspot rotates in and out of our image

Copyright: Remco Kemperman