Kepler-79

Kepler-79 is a star with four extra-solar planets noted for being super-puffs (low-density planets, apparently super-Earths with atmospheres much more extensive than Earth's). Characteristics:

• Cygnus - constellation.
• 20h02m04.11s - right ascension.
• +44deg22min53.65sec - declination.
• +13.98 - apparent magnitude.
• ~3300 ly - distance.
• 1.165 - M_Sun.
• 1.302 - radius(solar)
• 2.20 - luminosity(solar)

For comparison, a planet of Earth's density but three times Earth's radius would have 27 times Earth's mass: the most dense of these, Kepler-79b has only ~11 times Earth's mass, so if it is rocky, then much of its large radius (~3.5 times Earth's) must be atmosphere. Note that the orbital periods of the planets are reliably determined, but the other characteristics are derived through analysis and have considerable uncertainty, particularly their masses.