value unc_up unc_lo author ref method 6.53 nan nan Waszczak 2015AJ....150...75W Lightcurve 6.53 nan nan Durech 2023A&A...675A..24D Model 6.53 nan nan Behrend LCDB Lightcurve 6.53 nan nan Durech 2018A&A...617A..57D Model 6.53 nan nan Durech 2019A&A...631A...2D Model