It has also one of the longest periods, and hence is one of the most luminous in the class. There are still only a few Cepheids with longer periods, including RS Puppis, SV Vulpeculae, and the unusual S Vulpeculae.
This star stands out due to its exceptionally long orbital period, rendering it one of the most luminous in its group. A few other Cepheids have even longer orbital periods, including RS Puppis, SV Vulpeculae, and the unusual S Vulpeculae.