Several stars in Serpens have been found to have planets. The brightest, Omega Serpentis, located between Epsilon and Mu, is an orange giant with a planet of at least 1.7 Jupiter-masses.[38] NN Serpentis, an eclipsing post-common-envelope binary consisting of a white dwarf and a red dwarf,[39] is very likely to have two planets causing variations in the period of the eclipses.[40] Although it does not have a planet, the solar analog HD 137510 has been found to have a brown dwarf companion within the brown-dwarf desert.[41]