This week we stick with the winter targets which are now slowly becoming visible again early in the morning. The object this week is LkHa271. It is situated in the NGC1333 star forming region, and at a distance of roughly 280pc. This field has many very young and embedded stars, which are hence mostly faint and very red. Thus, for most of our participants this is one of the more challenging fields. In particular when observed in the Blue and Visual filters with a slightly smaller field of view, very often there are not enough stars visible to properly calibrate the photometry.
Nevertheless, we do have plenty of data for this field and the light curve of the object shows significant variability. On first sight it might look non-variable and just noise, but have a look at the scale. The star varies by at least three magnitudes on very short timescales. This means the brightness changes by almost a factor of 20 between the faint and bright state – on time scales as small as a week. But, as for most of the other YSOs, the star does not break out from it’s ‘normal’ range of variability. As you can see data has now started to come in for the current (7th) observing season of the field in HOYS. Thanks for staying up until the morning!