The HD 7924 System

3 planets Cassiopeia

HD 7924 is a planetary system in the constellation Cassiopeia hosting 3 confirmed exoplanets, about 55 light-years from Earth.

HD 7924: Star and Habitable Zone

HD 7924

Surface temperature: 5,131 K (Sun: 5,772 K)
Mass: 0.65 M☉
Radius: 0.78 R☉

HD 7924 b HD 7924 c HD 7924 d

Too hot Optimistic habitable zone Conservative habitable zone Too cold

Habitable zone of HD 7924: 0.479–1.151 AU (conservative: 0.606–1.092 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.

See the full interactive habitable-zone view in the Exoplanet Explorer app ›

All 3 Planets in the HD 7924 System

Planet	Type	Orbit	Radius	ESI	Discovered
HD 7924 b	Super Earth	5.4 d	—	0.25	2008
HD 7924 c	Super Earth	15 d	—	0.26	2015
HD 7924 d	Super Earth	24 d	—	0.31	2015

Discovery History

The first planet found here, HD 7924 b, was discovered in 2008 using the radial velocity method. The most recent addition, HD 7924 d, followed in 2015.

2008 — HD 7924 b (Radial Velocity)
2015 — HD 7924 c (Radial Velocity)
2015 — HD 7924 d (Radial Velocity)

Frequently Asked Questions About HD 7924

How many planets does HD 7924 have?

HD 7924 has 3 confirmed exoplanets. More may await discovery.

Are any planets in the HD 7924 system habitable?

None of the known planets in HD 7924 orbit within the star's habitable zone.

How far away is HD 7924?

HD 7924 is about 55 light-years from Earth in the constellation Cassiopeia.

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