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Proper Name	Iolaus
Designations	Lerna b, HAT-P-42 b, TOI-571 b
Classification	Gas giant
Orbital Period	4 days, 15 hours
Mean Distance from Lerna	8.6 million km 0.0575 AU
Mass	0.975 x Jupiter
Diameter	1.277 x Jupiter
Temperature	1,427 K (1,154°C)
Parent star	Lerna (HAT-P-42), yellow dwarf in Hydra
Other planets in this system	None

09 01 22.650 +06 05 50.02

FoV: 5.99'

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