value unc_up unc_lo author ref method 54.30 nan nan Waszczak 2015AJ....150...75W Lightcurve 54.78 nan nan Skiff 2019MPBu...46..458S Lightcurve 54.84 nan nan Durech 2023A&A...675A..24D Model 54.87 nan nan Skiff LCDB Lightcurve